WRB 10-Q Quarterly Report June 30, 2021 | Alphaminr
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WRB 10-Q Quarter ended June 30, 2021

Balance Sheet
Cash Flow
Income Statement
Debt
BERKLEY W R CORP
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 10-Q
(Mark one)
☒ QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Quarterly Period Ended June 30, 2021
or
☐
Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.
For the Transition Period from to .
Commission File Number
1-15202

W. R. BERKLEY CORP ORATION
(Exact name of registrant as specified in its charter)
Delaware 22-1867895
(State or other jurisdiction of
incorporation or organization) 		(I.R.S. Employer Identification No.)
475 Steamboat Road Greenwich Connecticut 06830
(Address of principal executive offices) (Zip Code)
(203) 629-3000
(Registrant’s telephone number, including area code)
None
Former name, former address and former fiscal year, if changed since last report .
Securities registered pursuant to Section 12(b) of the Act:
Title Trading Symbol Name
Common Stock, par value $.20 per share WRB New York Stock Exchange
5.70% Subordinated Debentures due 2058 WRB-PE New York Stock Exchange
5.10% Subordinated Debentures due 2059 WRB-PF New York Stock Exchange
4.25% Subordinated Debentures due 2060 WRB-PG New York Stock Exchange
4.125% Subordinated Debentures due 2061 WRB-PH New York Stock Exchange
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐
1

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filer
☒
Accelerated filer ☐
Non-accelerated filer ☐ Smaller reporting company ☐
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒
Number of shares of common stock, $.20 par value, outstanding as of July 28, 2021: 177,529,889
2

TABLE OF CONTENTS
EX-101 INSTANCE DOCUMENT
EX-101 SCHEMA DOCUMENT
EX-101 CALCULATION LINKBASE DOCUMENT
EX-101 LABELS LINKBASE DOCUMENT
EX-101 PRESENTATION LINKBASE DOCUMENT
EX-101 DEFINITION LINKBASE DOCUMENT
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Part I — FINANCIAL INFORMATION
Item 1 . Financial Statements
W. R. BERKLEY CORPORATION AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS
(In thousands, except share data)
June 30,
2021 		December 31,
2020
(Unaudited) (Audited)
Assets
Investments:
Fixed maturity securities (amortized cost of $ 15,350,553 and $ 13,755,858 ; allowance for expected credit losses of $ 19,364 and $ 2,580 at June 30, 2021 and December 31, 2020, respectively)
$ 15,653,508 $ 14,159,369
Real estate 1,811,263 1,960,914
Investment funds 1,369,453 1,309,430
Arbitrage trading account 634,276 341,473
Equity securities 642,993 625,667
Loans receivable (net of allowance for expected credit losses of $ 1,970 and $ 5,437 at June 30, 2021 and December 31, 2020, respectively)
116,009 84,913
Total investments 20,227,502 18,481,766
Cash and cash equivalents 1,790,199 2,372,366
Premiums and fees receivable (net of allowance for expected credit losses of $ 24,808 and $ 22,883 at June 30, 2021 and December 31, 2020, respectively)
2,487,649 2,167,799
Due from reinsurers (net of allowance for expected credit losses of $ 7,283 and $ 7,801 at June 30, 2021 and December 31, 2020, respectively)
2,681,266 2,424,502
Deferred policy acquisition costs 627,647 556,168
Prepaid reinsurance premiums 680,773 648,376
Trading account receivables from brokers and clearing organizations 361,586 524,727
Property, furniture and equipment 428,723 405,930
Goodwill 169,652 169,652
Accrued investment income 122,524 120,464
Current and deferred federal and foreign income taxes 44,659 —
Other assets 675,737 700,215
Total assets $ 30,297,917 $ 28,571,965
Liabilities and Equity
Liabilities:
Reserves for losses and loss expenses $ 14,480,947 $ 13,784,430
Unearned premiums 4,544,524 4,073,191
Due to reinsurers 535,286 426,124
Trading account securities sold but not yet purchased 190 10,048
Current and deferred federal and foreign income taxes — 48,495
Other liabilities 1,229,970 1,178,546
Senior notes and other debt 1,911,753 1,623,025
Subordinated debentures 1,007,293 1,102,309
Total liabilities 23,709,963 22,246,168
Equity:
Preferred stock, par value $ 0.10 per share:
Authorized 5,000,000 shares; issued and outstanding - none
— —
Common stock, par value $ 0.20 per share:
Authorized 750,000,000 shares, issued and outstanding, net of treasury shares, 177,413,970 and 177,825,150 shares, respectively
70,535 70,535
Additional paid-in capital 1,035,166 1,012,483
Retained earnings 8,682,088 8,348,381
Accumulated other comprehensive loss ( 122,444 ) ( 62,172 )
Treasury stock, at cost, 175,262,530 and 174,851,350 shares, respectively
( 3,087,069 ) ( 3,058,425 )
Total stockholders’ equity 6,578,276 6,310,802
Noncontrolling interests 9,678 14,995
Total equity 6,587,954 6,325,797
Total liabilities and equity $ 30,297,917 $ 28,571,965
See accompanying notes to interim consolidated financial statements.
1

W. R. BERKLEY CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
(In thousands, except per share data)
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
2021 2020 2021 2020
REVENUES:
Net premiums written $ 2,212,181 $ 1,739,818 $ 4,262,219 $ 3,585,664
Change in net unearned premiums ( 240,557 ) ( 62,903 ) ( 440,639 ) ( 217,331 )
Net premiums earned 1,971,624 1,676,915 3,821,580 3,368,333
Net investment income 168,187 85,431 326,764 260,194
Net investment gains (losses):
Net realized and unrealized gains (losses) on investments 20,461 61,653 72,219 ( 81,632 )
Change in allowance for expected credit losses on investments 3,603 16,232 ( 13,316 ) ( 17,657 )
Net investment gains (losses) 24,064 77,885 58,903 ( 99,289 )
Revenues from non-insurance businesses 109,122 75,742 196,552 169,471
Insurance service fees 22,256 19,870 48,064 45,621
Other income 833 183 1,092 2,305
Total revenues 2,296,086 1,936,026 4,452,955 3,746,635
OPERATING COSTS AND EXPENSES:
Losses and loss expenses 1,203,647 1,135,126 2,325,238 2,242,379
Other operating costs and expenses 647,705 580,840 1,263,973 1,159,173
Expenses from non-insurance businesses 106,698 76,238 192,989 170,996
Interest expense 38,096 38,373 74,747 75,105
Total operating costs and expenses 1,996,146 1,830,577 3,856,947 3,647,653
Income before income taxes 299,940 105,449 596,008 98,982
Income tax expense ( 62,262 ) ( 33,793 ) ( 126,614 ) ( 30,852 )
Net income before noncontrolling interests 237,678 71,656 469,394 68,130
Noncontrolling interests ( 440 ) ( 396 ) ( 2,631 ) ( 1,288 )
Net income to common stockholders $ 237,238 $ 71,260 $ 466,763 $ 66,842
NET INCOME PER SHARE:
Basic $ 1.28 $ 0.38 $ 2.52 $ 0.36
Diluted $ 1.27 $ 0.38 $ 2.50 $ 0.35

See accompanying notes to interim consolidated financial statements.





2

W. R. BERKLEY CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
(In thousands)
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
2021 2020 2021 2020
Net income before noncontrolling interests $ 237,678 $ 71,656 $ 469,394 $ 68,130
Other comprehensive income (loss):
Change in unrealized currency translation adjustments 2,537 21,447 6,587 ( 76,747 )
Change in unrealized investment gains (losses), net of taxes 23,272 318,725 ( 66,858 ) 59,743
Other comprehensive income (loss) 25,809 340,172 ( 60,271 ) ( 17,004 )
Comprehensive income 263,487 411,828 409,123 51,126
Noncontrolling interests ( 439 ) ( 395 ) ( 2,630 ) ( 1,289 )
Comprehensive income to common stockholders $ 263,048 $ 411,433 $ 406,493 $ 49,837

See accompanying notes to interim consolidated financial statements.
3

W. R. BERKLEY CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (UNAUDITED)
(In thousands, except per share data)
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
2021 2020 2021 2020
COMMON STOCK:
Beginning and end of period $ 70,535 $ 70,535 $ 70,535 $ 70,535
ADDITIONAL PAID-IN CAPITAL:
Beginning of period $ 1,023,556 $ 1,063,084 $ 1,012,483 $ 1,056,042
Restricted stock units issued 597 1,204 72 ( 3,386 )
Restricted stock units expensed 11,013 11,755 22,611 23,387
End of period $ 1,035,166 $ 1,076,043 $ 1,035,166 $ 1,076,043
RETAINED EARNINGS:
Beginning of period $ 8,556,621 $ 7,877,371 $ 8,348,381 $ 7,932,372
Cumulative effect adjustment resulting from changes in accounting principles — — — ( 30,514 )
Net income to common stockholders 237,238 71,260 466,763 66,842
Dividends ( $0.63, $ 0.12 , $0.75 and $ 0.23 per share, respectively )
( 111,771 ) ( 21,351 ) ( 133,056 ) ( 41,420 )
End of period $ 8,682,088 $ 7,927,280 $ 8,682,088 $ 7,927,280
ACCUMULATED OTHER COMPREHENSIVE LOSS:
Unrealized investment gains (losses):
Beginning of period $ 199,584 $ ( 109,514 ) $ 289,714 $ 124,514
Cumulative effect adjustment resulting from changes in accounting principles — — — 24,952
Change in unrealized gains (losses) on securities without an allowance for expected credit losses 23,340 295,274 ( 77,145 ) 34,753
Change in unrealized (losses) gains on securities with an allowance for expected credit losses ( 69 ) 23,450 10,286 24,991
End of period 222,855 209,210 222,855 209,210
Currency translation adjustments:
Beginning of period ( 347,836 ) ( 480,007 ) ( 351,886 ) ( 381,813 )
Net change in period 2,537 21,447 6,587 ( 76,747 )
End of period ( 345,299 ) ( 458,560 ) ( 345,299 ) ( 458,560 )
Total accumulated other comprehensive loss $ ( 122,444 ) $ ( 249,350 ) $ ( 122,444 ) $ ( 249,350 )
TREASURY STOCK:
Beginning of period $ ( 3,087,860 ) $ ( 2,927,994 ) $ ( 3,058,425 ) $ ( 2,726,711 )
Stock exercised/vested 791 883 1,039 2,221
Stock repurchased — ( 96,281 ) ( 29,683 ) ( 298,902 )
End of period $ ( 3,087,069 ) $ ( 3,023,392 ) $ ( 3,087,069 ) $ ( 3,023,392 )
NONCONTROLLING INTERESTS:
Beginning of period $ 15,684 $ 44,069 $ 14,995 $ 43,403
Distributions ( 6,445 ) ( 189 ) ( 7,947 ) ( 417 )
Net income 440 396 2,631 1,288
Other comprehensive income (loss), net of tax ( 1 ) ( 1 ) ( 1 ) 1
End of period $ 9,678 $ 44,275 $ 9,678 $ 44,275
See accompanying notes to interim consolidated financial statements.
4

W. R. BERKLEY CORPORATION AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)
(In thousands)
For the Six Months
Ended June 30,
2021 2020
CASH FROM OPERATING ACTIVITIES:
Net income to common stockholders $ 466,763 $ 66,842
Adjustments to reconcile net income to net cash from operating activities:
Net investment (gains) losses ( 58,903 ) 99,289
Depreciation and amortization 70,597 64,065
Noncontrolling interests 2,631 1,288
Investment funds ( 100,246 ) 16,975
Stock incentive plans 23,122 25,731
Change in:
Arbitrage trading account ( 139,520 ) ( 26,158 )
Premiums and fees receivable ( 321,718 ) ( 204,203 )
Reinsurance accounts ( 178,442 ) ( 118,849 )
Deferred policy acquisition costs ( 72,125 ) ( 31,478 )
Income taxes ( 71,205 ) 9,387
Reserves for losses and loss expenses 705,454 525,785
Unearned premiums 473,395 259,237
Other ( 103,994 ) ( 108,060 )
Net cash from operating activities 695,809 579,851
CASH (USED IN) FROM INVESTING ACTIVITIES:
Proceeds from sale of fixed maturity securities 1,474,054 3,194,333
Proceeds from sale of equity securities 98,765 67,122
Distributions from investment funds 88,363 67,234
Proceeds from maturities and prepayments of fixed maturity securities 3,156,861 1,859,392
Purchase of fixed maturity securities ( 6,266,934 ) ( 4,189,664 )
Purchase of equity securities ( 143,836 ) ( 35,591 )
Real estate sold (purchased) 202,115 ( 30,178 )
Change in loans receivable ( 28,510 ) 963
Net purchases of property, furniture and equipment ( 48,273 ) ( 23,006 )
Change in balances due to security brokers 65,751 ( 24,382 )
Other 2 85
Net cash (used in) from investing activities ( 1,401,642 ) 886,308
CASH FROM (USED IN) FINANCING ACTIVITIES:
Repayment of senior notes and other debt ( 505,230 ) ( 1,160 )
Net proceeds from issuance of debt 686,893 298,447
Cash dividends to common stockholders ( 21,285 ) ( 41,420 )
Purchase of common treasury shares ( 29,683 ) ( 298,902 )
Other, net ( 6,725 ) ( 4,140 )
Net cash from (used in) financing activities 123,970 ( 47,175 )
Net impact on cash due to change in foreign exchange rates ( 304 ) ( 11,868 )
Net change in cash and cash equivalents ( 582,167 ) 1,407,116
Cash and cash equivalents at beginning of year 2,372,366 1,023,710
Cash and cash equivalents at end of period $ 1,790,199 $ 2,430,826
See accompanying notes to interim consolidated financial statements.
5


W. R. Berkley Corporation and Subsidiaries
NOTES TO INTERIM CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED )

(1) General
The unaudited consolidated financial statements, which include the accounts of W. R. Berkley Corporation and its subsidiaries (the “Company”), have been prepared on the basis of U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Accordingly, they do not include all the information and notes required by GAAP for annual financial statements. The unaudited consolidated financial statements reflect all adjustments, consisting only of normal recurring items, which are necessary to present fairly the Company’s financial position and results of operations on a basis consistent with the prior audited consolidated financial statements. Operating results for interim periods are not necessarily indicative of the results that may be expected for the year. All significant intercompany accounts and transactions have been eliminated. Reclassifications have been made in the 2020 financial statements as originally reported to conform to the presentation of the 2021 financial statements. The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the revenues and expenses reflected during the reporting period. For further information related to areas of judgment and estimates and other information necessary to understand the Company’s financial position and results of operations, refer to the audited consolidated financial statements and notes included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.
The income tax provision has been computed based on the Company’s estimated annual effective tax rate. The effective income tax rate differs from the federal income tax rate of 21 % principally because of state and foreign income taxes, which was partially offset by tax-exempt investment income and tax benefits related to equity-based compensation.


(2) Per Share Data
The Company presents both basic and diluted net income per share (“EPS”) amounts. Basic EPS is calculated by dividing net income by the weighted average number of common shares outstanding during the period (including 7,767,874 and 7,575,168 common shares held in a grantor trust as of June 30, 2021 and 2020, respectively). The common shares held in the grantor trust are for delivery upon settlement of vested but mandatorily deferred restricted stock units ("RSUs"). Shares held by the grantor trust do not affect diluted shares outstanding since the shares deliverable under vested RSUs were already included in diluted shares outstanding. Diluted EPS is based upon the weighted average number of basic and common equivalent shares outstanding during the period and is calculated using the treasury stock method for stock incentive plans. Common equivalent shares are excluded from the computation in periods in which they have an anti-dilutive effect.
The weighted average number of common shares used in the computation of basic and diluted earnings per share was as follows:
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
(In thousands) 2021 2020 2021 2020
Basic 185,155 185,979 185,175 188,133
Diluted 187,106 187,862 186,985 190,078


(3) Recent Accounting Pronouncements and Accounting Policies
Recently adopted accounting pronouncements:
All accounting and reporting standards that have become effective in 2021 were either not applicable to the Company or their adoption did not have a material impact on the Company.
Accounting and reporting standards that are not yet effective:
All recently issued but not yet effective accounting and reporting standards are either not applicable to the Company or are not expected to have a material impact on the Company.

6

(4) Consolidated Statements of Comprehensive Income

The following table presents the components of the changes in accumulated other comprehensive (loss) income ("AOCI"):
(In thousands) Unrealized Investment Gains (Losses) Currency Translation Adjustments Accumulated Other Comprehensive
(Loss) Income
As of and for the six months ended June 30, 2021
Changes in AOCI
Beginning of period $ 289,714 $ ( 351,886 ) $ ( 62,172 )
Other comprehensive (loss) income before reclassifications ( 87,168 ) 6,587 ( 80,581 )
Amounts reclassified from AOCI 20,310 — 20,310
Other comprehensive (loss) income ( 66,858 ) 6,587 ( 60,271 )
Unrealized investment gain related to noncontrolling interest ( 1 ) — ( 1 )
End of period $ 222,855 $ ( 345,299 ) $ ( 122,444 )
Amounts reclassified from AOCI
Pre-tax $ 25,709 (1) $ — $ 25,709
Tax effect ( 5,399 ) (2) — ( 5,399 )
After-tax amounts reclassified $ 20,310 $ — $ 20,310
Other comprehensive (loss) income
Pre-tax $ ( 84,931 ) $ 6,587 $ ( 78,344 )
Tax effect 18,073 — 18,073
Other comprehensive (loss) income $ ( 66,858 ) $ 6,587 $ ( 60,271 )
As of and for the three months ended June 30, 2021
Changes in AOCI
Beginning of period $ 199,584 $ ( 347,836 ) $ ( 148,252 )
Other comprehensive income before reclassifications 11,823 2,537 14,360
Amounts reclassified from AOCI 11,449 — 11,449
Other comprehensive income 23,272 2,537 25,809
Unrealized investment gain related to noncontrolling interest ( 1 ) — ( 1 )
Ending balance $ 222,855 $ ( 345,299 ) $ ( 122,444 )
Amounts reclassified from AOCI
Pre-tax $ 14,493 (1) $ — $ 14,493
Tax effect ( 3,044 ) (2) — ( 3,044 )
After-tax amounts reclassified $ 11,449 $ — $ 11,449
Other comprehensive income
Pre-tax $ 28,804 $ 2,537 $ 31,341
Tax effect ( 5,532 ) — ( 5,532 )
Other comprehensive income $ 23,272 $ 2,537 $ 25,809
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As of and for the six months ended June 30, 2020
Changes in AOCI
Beginning of period $ 124,514 $ ( 381,813 ) $ ( 257,299 )
Cumulative effect adjustment resulting from changes in accounting principles 24,952 — 24,952
Restated beginning of period 149,466 ( 381,813 ) ( 232,347 )
Other comprehensive income (loss) before reclassifications 36,986 ( 76,747 ) ( 39,761 )
Amounts reclassified from AOCI 22,757 — 22,757
Other comprehensive income (loss) 59,743 ( 76,747 ) ( 17,004 )
Unrealized investment loss related to noncontrolling interest 1 — 1
End of period $ 209,210 $ ( 458,560 ) $ ( 249,350 )
Amounts reclassified from AOCI
Pre-tax $ 28,806 (1) $ — $ 28,806
Tax effect ( 6,049 ) (2) — ( 6,049 )
After-tax amounts reclassified $ 22,757 $ — $ 22,757
Other comprehensive income (loss)
Pre-tax $ 62,777 $ ( 76,747 ) $ ( 13,970 )
Tax effect ( 3,034 ) — ( 3,034 )
Other comprehensive income (loss) $ 59,743 $ ( 76,747 ) $ ( 17,004 )
As of and for the three months ended June 30, 2020
Changes in AOCI
Beginning of period $ ( 109,514 ) $ ( 480,007 ) $ ( 589,521 )
Other comprehensive income before reclassifications 335,518 21,447 356,965
Amounts reclassified from AOCI ( 16,793 ) — ( 16,793 )
Other comprehensive income 318,725 21,447 340,172
Unrealized investment gain related to noncontrolling interest ( 1 ) — ( 1 )
Ending balance $ 209,210 $ ( 458,560 ) $ ( 249,350 )
Amounts reclassified from AOCI
Pre-tax $ ( 21,257 ) (1) $ — $ ( 21,257 )
Tax effect 4,464 (2) — 4,464
After-tax amounts reclassified $ ( 16,793 ) $ — $ ( 16,793 )
Other comprehensive income
Pre-tax $ 395,624 $ 21,447 $ 417,071
Tax effect ( 76,899 ) — ( 76,899 )
Other comprehensive income $ 318,725 $ 21,447 $ 340,172
____________
(1) Net investment gains (losses) in the consolidated statements of income.
(2) Income tax (expense) benefit in the consolidated statements of income.


(5) Statements of Cash Flows
Interest payments were $ 71,781,000 and $ 73,056,000 for the six months ended June 30, 2021 and 2020, respectively. Income taxes were $ 177,000,000 paid for the six months ended June 30, 2021. No income tax was paid for such period in 2020.

8

(6) Investments in Fixed Maturity Securities
At June 30, 2021 and December 31, 2020, investments in fixed maturity securities were as follows:
(In thousands) Amortized
Cost 		Allowance for Expected Credit Losses (1) Gross Unrealized Fair
Value 		Carrying
Value
Gains Losses
June 30, 2021
Held to maturity:
State and municipal $ 68,310 $ ( 453 ) $ 12,069 $ — $ 79,926 $ 67,857
Residential mortgage-backed 5,724 — 859 — 6,583 5,724
Total held to maturity 74,034 ( 453 ) 12,928 — 86,509 73,581
Available for sale:
U.S. government and government agency 488,196 — 14,890 ( 461 ) 502,625 502,625
State and municipal:
Special revenue 2,074,036 — 85,037 ( 1,433 ) 2,157,640 2,157,640
State general obligation 378,596 — 29,413 ( 250 ) 407,759 407,759
Pre-refunded 225,787 — 17,677 ( 607 ) 242,857 242,857
Corporate backed 156,970 — 9,082 ( 862 ) 165,190 165,190
Local general obligation 419,506 — 33,630 ( 426 ) 452,710 452,710
Total state and municipal 3,254,895 — 174,839 ( 3,578 ) 3,426,156 3,426,156
Mortgage-backed:
Residential 771,507 — 16,798 ( 8,189 ) 780,116 780,116
Commercial 137,996 — 5,740 ( 150 ) 143,586 143,586
Total mortgage-backed 909,503 — 22,538 ( 8,339 ) 923,702 923,702
Asset-backed 4,333,543 — 8,449 ( 24,129 ) 4,317,863 4,317,863
Corporate:
Industrial 3,019,720 ( 12 ) 94,056 ( 7,761 ) 3,106,003 3,106,003
Financial 1,583,291 — 51,103 ( 1,076 ) 1,633,318 1,633,318
Utilities 406,423 — 18,531 ( 1,106 ) 423,848 423,848
Other 177,445 — 416 ( 367 ) 177,494 177,494
Total corporate 5,186,879 ( 12 ) 164,106 ( 10,310 ) 5,340,663 5,340,663
Foreign government 1,103,503 ( 18,899 ) 17,176 ( 32,862 ) 1,068,918 1,068,918
Total available for sale 15,276,519 ( 18,911 ) 401,998 ( 79,679 ) 15,579,927 15,579,927
Total investments in fixed maturity securities $ 15,350,553 $ ( 19,364 ) $ 414,926 $ ( 79,679 ) $ 15,666,436 $ 15,653,508
____________
(1) Represents the amount of impairment that has resulted from credit-related factors. The change in the allowance for expected credit losses is recognized in the consolidated statements of income. Amount excludes unrealized losses relating to non-credit factors.
9

(In thousands) Amortized
Cost 		Allowance for Expected Credit Losses (1) Gross Unrealized Fair
Value 		Carrying
Value
Gains Losses
December 31, 2020
Held to maturity:
State and municipal $ 67,117 $ ( 798 ) $ 13,217 $ — $ 79,536 $ 66,319
Residential mortgage-backed 6,455 — 1,043 — 7,498 6,455
Total held to maturity 73,572 ( 798 ) 14,260 — 87,034 72,774
Available for sale:
U.S. government and government agency 586,020 — 18,198 ( 347 ) 603,871 603,871
State and municipal:
Special revenue 2,137,162 — 96,924 ( 714 ) 2,233,372 2,233,372
State general obligation 417,397 — 33,407 — 450,804 450,804
Pre-refunded 250,081 — 21,472 ( 162 ) 271,391 271,391
Corporate backed 206,356 — 8,755 ( 638 ) 214,473 214,473
Local general obligation 410,583 — 40,596 ( 555 ) 450,624 450,624
Total state and municipal 3,421,579 — 201,154 ( 2,069 ) 3,620,664 3,620,664
Mortgage-backed:
Residential 813,187 — 24,664 ( 5,238 ) 832,613 832,613
Commercial 181,105 — 6,725 ( 113 ) 187,717 187,717
Total mortgage-backed securities 994,292 — 31,389 ( 5,351 ) 1,020,330 1,020,330
Asset-backed 3,218,048 — 10,035 ( 33,497 ) 3,194,586 3,194,586
Corporate:
Industrial 2,456,516 ( 518 ) 115,926 ( 7,449 ) 2,564,475 2,564,475
Financial 1,513,943 — 62,947 ( 987 ) 1,575,903 1,575,903
Utilities 389,267 — 31,931 ( 33 ) 421,165 421,165
Other 109,353 — 696 ( 11 ) 110,038 110,038
Total corporate 4,469,079 ( 518 ) 211,500 ( 8,480 ) 4,671,581 4,671,581
Foreign government 993,268 ( 1,264 ) 28,007 ( 44,448 ) 975,563 975,563
Total available for sale 13,682,286 ( 1,782 ) 500,283 ( 94,192 ) 14,086,595 14,086,595
Total investments in fixed maturity securities $ 13,755,858 $ ( 2,580 ) $ 514,543 $ ( 94,192 ) $ 14,173,629 $ 14,159,369
____________
(1) Represents the amount of impairment that has resulted from credit-related factors. The change in the allowance for expected credit losses, excluding the cumulative effect adjustment resulting from changes in accounting principles, is recognized in the consolidated statements of income. Amount excludes unrealized losses relating to non-credit factors.
The following table presents the rollforward of the allowance for expected credit losses for state and municipal held to maturity securities for the six months ended June 30, 2021 and 2020:
(In thousands) 2021 2020
Allowance for expected credit losses, beginning of period $ 798 $ —
Cumulative effect adjustment resulting from changes in accounting principles — 69
Provision for expected credit losses ( 345 ) 879
Allowance for expected credit losses, end of period $ 453 $ 948
The following table presents the rollforward of the allowance for expected credit losses for state and municipal held to maturity securities for the three months ended June 30, 2021 and 2020:

10

(In thousands) 2021 2020
Allowance for expected credit losses, beginning of period $ 730 $ 107
Provision for expected credit losses ( 277 ) 841
Allowance for expected credit losses, end of period $ 453 $ 948
The following table presents the rollforward of the allowance for expected credit losses for available for sale securities for the six months ended June 30, 2021 and 2020:
2021 2020
(In thousands) Foreign Government Corporate Total Foreign Government Corporate Total
Allowance for expected credit losses, beginning of period $ 1,264 $ 518 $ 1,782 $ — $ — $ —
Cumulative effect adjustment resulting from changes in accounting principles — — — 35,645 — 35,645
Expected credit losses on securities for which credit losses were not previously recorded 18,990 16 19,006 12,494 6,797 19,291
Expected credit losses on securities for which credit losses were previously recorded ( 861 ) ( 517 ) ( 1,378 ) 547 ( 3,758 ) ( 3,211 )
Reduction due to disposals ( 494 ) ( 5 ) ( 499 ) ( 3,917 ) ( 2,315 ) ( 6,232 )
Allowance for expected credit losses, end of period $ 18,899 $ 12 $ 18,911 $ 44,769 $ 724 $ 45,493

The following table presents the rollforward of the allowance for expected credit losses for available for sale securities for the three months ended June 30, 2021 and 2020:
2021 2020
(In thousands) Foreign Government Corporate Total Foreign Government Corporate Total
Allowance for expected credit losses, beginning of period $ 19,993 $ 16 $ 20,009 $ 60,920 $ 6,436 $ 67,356
Expected credit losses on securities for which credit losses were not previously recorded — — — — 361 361
Expected credit losses on securities for which credit losses were previously recorded ( 600 ) ( 4 ) ( 604 ) ( 15,822 ) ( 3,758 ) ( 19,580 )
Reduction due to disposals ( 494 ) — ( 494 ) ( 329 ) ( 2,315 ) ( 2,644 )
Allowance for expected credit losses, end of period $ 18,899 $ 12 $ 18,911 $ 44,769 $ 724 $ 45,493
During the six months ended June 30, 2021, the Company increased the allowance for expected credit losses for available for sale securities utilizing its credit loss assessment process and inputs used in its credit loss model, primarily due to foreign government securities that had no reserve in prior periods. During the six months ended June 30, 2020, the Company increased the allowance for expected credit losses for available for sale securities primarily due to the negative impact to the financial markets caused by COVID-19.






11

The amortized cost and fair value of fixed maturity securities at June 30, 2021, by contractual maturity, are shown below. Actual maturities may differ from contractual maturities because certain issuers may have the right to call or prepay obligations.
(In thousands) Amortized
Cost (1) 		Fair
Value
Due in one year or less $ 1,735,412 $ 1,739,369
Due after one year through five years 6,570,612 6,726,040
Due after five years through ten years 3,888,420 3,993,735
Due after ten years 2,240,429 2,277,007
Mortgage-backed securities 915,227 930,285
Total $ 15,350,100 $ 15,666,436
________________
(1) Amortized cost is reduced by the allowance for expected credit losses of $ 453 thousand related to held to maturity securities.
At June 30, 2021 and December 31, 2020, there were no investments that exceeded 10% of common stockholders' equity, other than investments in United States government and government agency securities.


(7) Investments in Equity Securities
At June 30, 2021 and December 31, 2020, investments in equity securities were as follows:
(In thousands) Cost Gross Unrealized Fair
Value 		Carrying
Value
Gains Losses
June 30, 2021
Common stocks $ 367,228 $ 88,228 $ ( 5,956 ) $ 449,500 $ 449,500
Preferred stocks 208,685 8,398 ( 23,590 ) 193,493 193,493
Total $ 575,913 $ 96,626 $ ( 29,546 ) $ 642,993 $ 642,993
December 31, 2020
Common stocks $ 335,617 $ 28,742 $ ( 14,178 ) $ 350,181 $ 350,181
Preferred stocks 180,397 95,581 ( 492 ) 275,486 275,486
Total $ 516,014 $ 124,323 $ ( 14,670 ) $ 625,667 $ 625,667




(8) Arbitrage Trading Account
At June 30, 2021 and December 31, 2020, the fair and carrying values of the arbitrage trading account were $ 634 million and $ 341 million, respectively. The primary focus of the trading account is merger arbitrage. Merger arbitrage is the business of investing in the securities of publicly held companies which are the targets in announced tender offers and mergers. Arbitrage investing differs from other types of investing in its focus on transactions and events believed likely to bring about a change in value over a relatively short time period (usually four months or less).
The Company uses put options and call options in order to mitigate the impact of potential changes in market conditions on the merger arbitrage trading account. These options are reported at fair value. As of June 30, 2021, the fair value of long option contracts outstanding was $ 3 thousand (notional amount of $ 741 thousand) and the fair value of short option contracts outstanding was $ 183 thousand (notional amount of $ 9.8 million). Other than with respect to the use of these trading account securities, the Company does not make use of derivatives.





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(9) Net Investment Income
Net investment income consisted of the following:
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
(In thousands) 2021 2020 2021 2020
Investment income (loss) earned on:
Fixed maturity securities, including cash and cash equivalents and loans receivable $ 96,996 $ 105,843 $ 191,673 $ 233,861
Investment funds 61,311 ( 57,552 ) 100,246 ( 16,975 )
Arbitrage trading account 3,914 31,304 22,989 32,442
Equity securities 7,212 2,726 13,392 4,288
Real estate 872 5,045 2,032 11,141
Gross investment income 170,305 87,366 330,332 264,757
Investment expense ( 2,118 ) ( 1,935 ) ( 3,568 ) ( 4,563 )
Net investment income $ 168,187 $ 85,431 $ 326,764 $ 260,194


(10) Investment Funds
The Company evaluates whether it is an investor in a variable interest entity ("VIE"). Such entities do not have sufficient equity at risk to finance their activities without additional subordinated financial support, or the equity investors, as a group, do not have the characteristics of a controlling financial interest (primary beneficiary). The Company determines whether it is the primary beneficiary of an entity subject to consolidation based on a qualitative assessment of the VIE's capital structure, contractual terms, nature of the VIE's operations and purpose, and the Company's relative exposure to the related risks of the VIE on the date it becomes initially involved in the VIE and on an ongoing basis. The Company is not the primary beneficiary in any of its investment funds, and accordingly, carries its interests in investment funds under the equity method of accounting.
The Company’s maximum exposure to loss with respect to these investments is limited to the carrying amount reported on the Company’s consolidated balance sheet and its unfunded commitments, which were $ 166 million as of June 30, 2021.
Investment funds consisted of the following:
Carrying Value as of Income (Loss) from
Investment Funds
June 30, December 31, For the Six Months
Ended June 30,
(In thousands) 2021 2020 2021 2020
Financial services $ 452,233 $ 434,437 $ 48,990 $ ( 6,881 )
Real Estate 262,889 310,783 10,506 4,021
Transportation 271,536 190,125 17,177 ( 4,627 )
Energy 149,008 140,935 9,492 ( 20,968 )
Other funds 233,787 233,150 14,081 11,480
Total $ 1,369,453 $ 1,309,430 $ 100,246 $ ( 16,975 )
The Company's share of the earnings or losses from investment funds is generally reported on a one-quarter lag in order to facilitate the timely completion of the Company's consolidated financial statements.
Financial services investment funds include the Company’s minority investment in Lifson Re, a Bermuda reinsurance company. Effective January 1, 2021, Lifson Re participates on a fully collateralized basis in a majority of the Company’s reinsurance placements for a 22.5 % share of placed amounts. This pertains to all traditional reinsurance/retrocessional placements for both property and casualty business where there is more than one open market reinsurer participating. As of June 30, 2021, the Company has ceded approximately $ 139 million of written premiums to Lifson Re.


13


(11) Real Estate
Investment in real estate represents directly owned property held for investment, as follows:
Carrying Value
June 30, December 31,
(In thousands) 2021 2020
Properties in operation $ 1,586,911 $ 1,738,144
Properties under development 224,352 222,770
Total $ 1,811,263 $ 1,960,914

As of June 30, 2021, properties in operation included a long-term ground lease in Washington, D.C., an office complex in New York City, an office building in London, U.K., and the completed portion of a mixed-use project in Washington D.C. Properties in operation are net of accumulated depreciation and amortization of $ 64,226,000 and $ 86,970,000 as of June 30, 2021 and December 31, 2020, respectively. Related depreciation expense was $ 9,622,000 and $ 13,776,000 for the six months ended June 30, 2021 and 2020, respectively. Future minimum rental income expected on operating leases relating to properties in operation is $ 29,265,862 in 2021, $ 59,450,838 in 2022, $ 53,607,393 in 2023, $ 52,500,378 in 2024, $ 50,115,697 in 2025, $ 47,602,823 in 2026 and $ 597,389,153 thereafter.
During the three months ended June 30, 2021, the Company sold two office buildings in Palm Beach and West Palm Beach, Florida. One of these sales also resulted in a $ 102 million reduction of the Company's debt that was supporting the property.
A mixed-use project in Washington, D.C. has been under development in 2021 and 2020, with the completed portion reported in properties in operation as of June 30, 2021.

(12) Loans Receivable

At June 30, 2021 and December 31, 2020, loans receivable were as follows:
(In thousands) June 30,
2021 		December 31,
2020
Amortized cost (net of allowance for expected credit losses):
Real estate loans $ 89,821 $ 51,910
Commercial loans 26,188 33,003
Total $ 116,009 $ 84,913
Fair value:
Real estate loans $ 91,322 $ 53,593
Commercial loans 26,188 33,003
Total $ 117,510 $ 86,596
The real estate loans are secured by commercial and residential real estate primarily located in New York. These loans generally earn interest at fixed or stepped interest rates and have maturities through 2026. The commercial loans are with small business owners who have secured the related financing with the assets of the business. Commercial loans primarily earn interest on a fixed basis and have varying maturities generally not exceeding 10 years.
Loans receivable in non-accrual status were both $ 0.2 million as of June 30, 2021 and December 31, 2020.
The following table presents the rollforward of the allowance for expected credit losses for loans receivable for the six months ended June 30, 2021 and 2020:
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2021 2020
(In thousands) Real Estate Loans Commercial Loans Total Real Estate Loans Commercial Loans Total
Allowance for expected credit losses, beginning of period $ 1,683 $ 3,754 $ 5,437 $ 1,502 $ 644 $ 2,146
Cumulative effect adjustment resulting from changes in accounting principles — — — ( 905 ) 548 ( 357 )
Provision for expected credit losses ( 182 ) ( 3,285 ) ( 3,467 ) 3,721 3,209 6,930
Allowance for expected credit losses, end of period $ 1,501 $ 469 $ 1,970 $ 4,318 $ 4,401 $ 8,719
The following table presents the rollforward of the allowance for expected credit losses for loans receivable for the three months ended June 30, 2021 and 2020:
2021 2020
(In thousands) Real Estate Loans Commercial Loans Total Real Estate Loans Commercial Loans Total
Allowance for expected credit losses, beginning of period $ 1,608 $ 2,590 $ 4,198 $ 1,435 $ 2,493 $ 3,928
Provision for expected credit losses ( 107 ) ( 2,121 ) ( 2,228 ) 2,883 1,908 4,791
Allowance for expected credit losses, end of period $ 1,501 $ 469 $ 1,970 $ 4,318 $ 4,401 $ 8,719
The Company monitors the performance of its loans receivable and assesses the ability of the borrower to pay principal and interest based upon loan structure, underlying property values, cash flow and related financial and operating performance of the property and market conditions.
In evaluating the real estate loans, the Company considers their credit quality indicators, including loan to value ratios, which compare the outstanding loan amount to the estimated value of the property, the borrower’s financial condition and performance with respect to loan terms, the position in the capital structure, the overall leverage in the capital structure and other market conditions.

15

(13) Net Investment Gains (Losses)
Net investment gains (losses) were as follows:
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
(In thousands) 2021 2020 2021 2020
Net investment gains (losses):
Fixed maturity securities:
Gains $ 5,440 $ 14,844 $ 13,680 $ 19,775
Losses ( 2,236 ) ( 9,234 ) ( 4,307 ) ( 14,081 )
Equity securities (1):
Net realized gains on investment sales 6,256 5,727 14,828 5,727
Change in unrealized (losses) gains ( 18,239 ) 61,914 ( 42,574 ) ( 92,552 )
Investment funds ( 300 ) 913 47,371 31,096
Real estate 49,492 ( 7,137 ) 62,401 ( 7,824 )
Loans receivable ( 881 ) — ( 881 ) —
Other ( 19,071 ) ( 5,374 ) ( 18,299 ) ( 23,773 )
Net realized and unrealized gains (losses) on investments in earnings before allowance for expected credit losses 20,461 61,653 72,219 ( 81,632 )
Change in allowance for expected credit losses on investments:
Fixed maturity securities 1,375 21,023 ( 16,783 ) ( 10,727 )
Loans receivable 2,228 ( 4,791 ) 3,467 ( 6,930 )
Change in allowance for expected credit losses on investments 3,603 16,232 ( 13,316 ) ( 17,657 )
Net investment gains (losses) 24,064 77,885 58,903 ( 99,289 )
Income tax (expense) benefit ( 5,264 ) ( 18,098 ) ( 11,151 ) 22,476
After-tax net investment gains (losses) $ 18,800 $ 59,787 $ 47,752 $ ( 76,813 )
Change in unrealized investment gains (losses) on available for sale securities:
Fixed maturity securities without allowance for expected credit losses $ 28,511 $ 369,615 $ ( 94,058 ) $ 43,199
Fixed maturity securities with allowance for expected credit losses ( 69 ) 23,450 10,286 24,991
Investment funds 762 4,212 ( 257 ) ( 3,434 )
Other ( 400 ) ( 1,653 ) ( 902 ) ( 1,979 )
Total change in unrealized investment gains (losses) 28,804 395,624 ( 84,931 ) 62,777
Income tax (expense) benefit ( 5,532 ) ( 76,899 ) 18,073 ( 3,034 )
Noncontrolling interests ( 1 ) ( 1 ) ( 1 ) 1
After-tax change in unrealized investment gains (losses) of available for sale securities $ 23,271 $ 318,724 $ ( 66,859 ) $ 59,744
______________________
(1) The net realized gains or losses on investment sales represent the total gains or losses from the purchase dates of the equity securities. The change in unrealized (losses) gains consists of two components: (i) the reversal of the gain or loss recognized in previous periods on equity securities sold and (ii) the change in unrealized gain or loss resulting from mark-to-market adjustments on equity securities still held.


16

(14) Fixed Maturity Securities in an Unrealized Loss Position
The following tables summarize all fixed maturity securities in an unrealized loss position at June 30, 2021 and December 31, 2020 by the length of time those securities have been continuously in an unrealized loss position:
Less Than 12 Months 12 Months or Greater Total
(In thousands) Fair
Value 		Gross
Unrealized Losses 		Fair
Value 		Gross
Unrealized Losses 		Fair
Value 		Gross
Unrealized Losses
June 30, 2021
U.S. government and government agency $ 38,752 $ 458 $ 524 $ 3 $ 39,276 $ 461
State and municipal 205,730 2,222 22,655 1,356 228,385 3,578
Mortgage-backed 266,963 7,799 29,570 540 296,533 8,339
Asset-backed 2,581,697 6,817 606,663 17,312 3,188,360 24,129
Corporate 972,383 8,212 44,055 2,098 1,016,438 10,310
Foreign government 376,746 11,433 11,921 21,429 388,667 32,862
Fixed maturity securities $ 4,442,271 $ 36,941 $ 715,388 $ 42,738 $ 5,157,659 $ 79,679
December 31, 2020
U.S. government and government agency $ 47,649 $ 347 $ 17 $ — $ 47,666 $ 347
State and municipal 147,754 1,165 20,528 904 168,282 2,069
Mortgage-backed 212,388 5,121 23,943 230 236,331 5,351
Asset-backed 1,389,133 6,563 656,877 26,934 2,046,010 33,497
Corporate 612,177 6,721 39,985 1,759 652,162 8,480
Foreign government 143,729 22,871 6,218 21,577 149,947 44,448
Fixed maturity securities $ 2,552,830 $ 42,788 $ 747,568 $ 51,404 $ 3,300,398 $ 94,192
Substantially all of the securities in an unrealized loss position are rated investment grade, except for the securities in the foreign government classification. A significant amount of the unrealized loss on foreign government securities is the result of changes in currency exchange rates.
A summary of the Company’s non-investment grade fixed maturity securities that were in an unrealized loss position at June 30, 2021 is presented in the table below:
($ in thousands) Number of
Securities 		Aggregate
Fair Value 		Gross
Unrealized Loss
Foreign government 27 $ 108,910 $ 30,171
Corporate 10 36,482 2,058
Mortgage-backed 4 276 19
Asset-backed 1 113 1
Total 42 $ 145,781 $ 32,249
For fixed maturity securities that management does not intend to sell or to be required to sell, the portion of the decline in value that is considered to be due to credit factors is recognized in earnings, and the portion of the decline in value that is considered to be due to non-credit factors is recognized in other comprehensive income.
The Company has evaluated its fixed maturity securities in an unrealized loss position and believes the unrealized losses are due primarily to temporary market and sector-related factors rather than to issuer-specific factors. None of these securities are delinquent or in default under financial covenants. Based on its assessment of these issuers, the Company expects them to continue to meet their contractual payment obligations as they become due.

17

(15) Fair Value Measurements
The Company’s fixed maturity available for sale securities, equity securities and its arbitrage trading account securities are carried at fair value. Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels, as follows:
Level 1 - Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.
Level 2 - Quoted prices for similar assets or valuations based on inputs that are observable.
Level 3 - Estimates of fair value based on internal pricing methodologies using unobservable inputs. Unobservable inputs are only used to measure fair value to the extent that observable inputs are not available.
Substantially all of the Company’s fixed maturity securities were priced by independent pricing services. The prices provided by the independent pricing services are estimated based on observable market data in active markets utilizing pricing models and processes, which may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, sector groupings, matrix pricing and reference data. The pricing services may prioritize inputs differently on any given day for any security based on market conditions, and not all inputs are available for each security evaluation on any given day. The pricing services used by the Company have indicated that they will only produce an estimate of fair value if objectively verifiable information is available. The determination of whether markets are active or inactive is based upon the volume and level of activity for a particular asset class. The Company reviews the prices provided by pricing services for reasonableness and periodically performs independent price tests of a sample of securities to ensure proper valuation.
If prices from independent pricing services are not available for fixed maturity securities, the Company estimates the fair value. For Level 2 securities, the Company utilizes pricing models and processes which may include benchmark yields, sector groupings, matrix pricing, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, bids, offers and reference data. Where broker quotes are used, the Company generally requests two or more quotes and sets a price within the range of quotes received based on its assessment of the credibility of the quote and its own evaluation of the security. The Company generally does not adjust quotes received from brokers. For securities traded only in private negotiations, the Company determines fair value based primarily on the cost of such securities, which is adjusted to reflect prices of recent placements of securities of the same issuer, financial projections, credit quality and business developments of the issuer and other relevant information.
For Level 3 securities, the Company generally uses a discounted cash flow model to estimate the fair value of fixed maturity securities. The cash flow models are based upon assumptions as to prevailing credit spreads, interest rate and interest rate volatility, time to maturity and subordination levels. Projected cash flows are discounted at rates that are adjusted to reflect illiquidity, where appropriate.
18

The following tables present the assets and liabilities measured at fair value on a recurring basis as of June 30, 2021 and December 31, 2020 by level:
(In thousands) Total Level 1 Level 2 Level 3
June 30, 2021
Assets:
Fixed maturity securities available for sale:
U.S. government and government agency $ 502,625 $ — $ 502,625 $ —
State and municipal 3,426,156 — 3,426,156 —
Mortgage-backed 923,702 — 923,702 —
Asset-backed 4,317,863 — 4,317,863 —
Corporate 5,340,663 — 5,340,663 —
Foreign government 1,068,918 — 1,068,918 —
Total fixed maturity securities available for sale 15,579,927 — 15,579,927 —
Equity securities:
Common stocks 449,500 437,758 2,261 9,481
Preferred stocks 193,493 — 184,160 9,333
Total equity securities 642,993 437,758 186,421 18,814
Arbitrage trading account 634,276 621,883 12,393 —
Total $ 16,857,196 $ 1,059,641 $ 15,778,741 $ 18,814
Liabilities:
Trading account securities sold but not yet purchased $ 190 $ 190 $ — $ —
December 31, 2020
Assets:
Fixed maturity securities available for sale:
U.S. government and government agency $ 603,871 $ — $ 603,871 $ —
State and municipal 3,620,664 — 3,620,664 —
Mortgage-backed 1,020,330 — 1,020,330 —
Asset-backed 3,194,586 — 3,194,586 —
Corporate 4,671,581 — 4,670,581 1,000
Foreign government 975,563 — 975,563 —
Total fixed maturity securities available for sale 14,086,595 — 14,085,595 1,000
Equity securities:
Common stocks 350,181 340,966 — 9,215
Preferred stocks 275,486 — 266,155 9,331
Total equity securities 625,667 340,966 266,155 18,546
Arbitrage trading account 341,473 298,359 43,114 —
Total $ 15,053,735 $ 639,325 $ 14,394,864 $ 19,546
Liabilities:
Trading account securities sold but not yet purchased $ 10,048 $ 10,048 $ — $ —

19

The following tables summarize changes in Level 3 assets and liabilities for the six months ended June 30, 2021 and for the year ended December 31, 2020:
Gains (Losses) Included in:
(In thousands) Beginning
Balance 		Earnings (Losses) Other
Comprehensive
Income 		Impairments Purchases (Sales) Paydowns / Maturities Transfers In / (Out) Ending
Balance
Six Months Ended June 30, 2021
Assets:
Fixed maturities securities available for sale:
Corporate $ 1,000 $ — $ — $ — $ — $ ( 1,000 ) $ — $ — $ —
Total 1,000 — — — — ( 1,000 ) — — —
Equity securities:
Common stocks $ 9,215 $ 827 $ — $ — $ — $ ( 561 ) $ — $ — $ 9,481
Preferred stocks 9,331 2 — — — — — — 9,333
Total 18,546 829 — — — ( 561 ) — — 18,814
Arbitrage trading account — 1 — — — ( 1 ) — — —
Total $ 19,546 $ 830 $ — $ — $ — $ ( 1,562 ) $ — $ — $ 18,814
Year Ended
December 31, 2020
Assets:
Fixed maturities securities available for sale:
Corporate $ — $ — $ — $ — $ — $ — $ — $ 1,000 $ 1,000
Total — — — — — — — 1,000 1,000
Equity securities:
Common stocks 9,053 1,228 — — — ( 1,066 ) — — 9,215
Preferred stocks 6,505 ( 174 ) — — 3,000 — — — 9,331
Total 15,558 1,054 — — 3,000 ( 1,066 ) — — 18,546
Arbitrage trading account — 19 — — — ( 19 ) — — —
Total $ 15,558 $ 1,073 $ — $ — $ 3,000 $ ( 1,085 ) $ — $ 1,000 $ 19,546
For the six months ended June 30, 2021, there were no securities transferred into or out of Level 3. For the year ended December 31, 2020, a fixed maturity security was transferred from Level 2 into Level 3 as a result of observable valuation inputs no longer being available.

20

(16) Reserves for Loss and Loss Expenses
The Company's reserves for losses and loss expenses are comprised of case reserves and incurred but not reported liabilities ("IBNR"). When a claim is reported, a case reserve is established for the estimated ultimate payment based upon known information about the claim. As more information about the claim becomes available over time, case reserves are adjusted up or down as appropriate. Reserves are also established on an aggregate basis to provide for IBNR liabilities and expected loss reserve development on reported claims.
Loss reserves included in the Company’s financial statements represent management’s best estimates based upon an actuarially derived point estimate and other considerations. The Company uses a variety of actuarial techniques and methods to derive an actuarial point estimate for each operating unit. These methods include paid loss development, incurred loss development, paid and incurred Bornhuetter-Ferguson methods and frequency and severity methods. In circumstances where one actuarial method is considered more credible than the others, that method is used to set the point estimate. The actuarial point estimate may also be based on a judgmental weighting of estimates produced from each of the methods considered. Industry loss experience is used to supplement the Company’s own data in selecting “tail factors” in areas where the Company’s own data is limited. The actuarial data is analyzed by line of business, coverage and accident or policy year, as appropriate, for each operating unit.
The establishment of the actuarially derived loss reserve point estimate also includes consideration of qualitative factors that may affect the ultimate losses. These qualitative considerations include, among others, the impact of re-underwriting initiatives, changes in the mix of business, changes in distribution sources and changes in policy terms and conditions.
The key assumptions used to arrive at the best estimate of loss reserves are the expected loss ratios, rate of loss cost inflation, and reported and paid loss emergence patterns. Expected loss ratios represent management’s expectation of losses at the time the business is priced and written, before any actual claims experience has emerged. This expectation is a significant determinant of the estimate of loss reserves for recently written business where there is little paid or incurred loss data to consider. Expected loss ratios are generally derived from historical loss ratios adjusted for the impact of rate changes, loss cost trends and known changes in the type of risks underwritten. Expected loss ratios are estimated for each key line of business within each operating unit. Expected loss cost inflation is particularly important for the long-tail lines, such as excess casualty, and claims with a high medical component, such as workers’ compensation. Reported and paid loss emergence patterns are used to project current reported or paid loss amounts to their ultimate settlement value. Loss development factors are based on the historical emergence patterns of paid and incurred losses, and are derived from the Company’s own experience and industry data. The paid loss emergence pattern is also significant to excess and assumed workers’ compensation reserves because those reserves are discounted to their estimated present value based upon such estimated payout patterns.
Loss frequency and severity are measures of loss activity that are considered in determining the key assumptions described in our discussion of loss and loss expense reserves, including expected loss ratios, rate of loss cost inflation and reported and paid loss emergence patterns. Loss frequency is a measure of the number of claims per unit of insured exposure, and loss severity is a measure of the average size of claims. Factors affecting loss frequency include the effectiveness of loss controls and safety programs and changes in economic activity or weather patterns. Factors affecting loss severity include changes in policy limits, retentions, rate of inflation and judicial interpretations.
Another factor affecting estimates of loss frequency and severity is the loss reporting lag, which is the period of time between the occurrence of a loss and the date the loss is reported to the Company. The length of the loss reporting lag affects our ability to accurately predict loss frequency (loss frequencies are more predictable for lines with short reporting lags) as well as the amount of reserves needed for incurred but not reported losses (less IBNR is required for lines with short reporting lags). As a result, loss reserves for lines with short reporting lags are likely to have less variation from initial loss estimates. For lines with short reporting lags, which include commercial automobile, primary workers’ compensation, other liability (claims-made) and property business, the key assumption is the loss emergence pattern used to project ultimate loss estimates from known losses paid or reported to date. For lines of business with long reporting lags, which include other liability (occurrence), products liability, excess workers’ compensation and liability reinsurance, the key assumption is the expected loss ratio since there is often little paid or incurred loss data to consider. Historically, the Company has experienced less variation from its initial loss estimates for lines of businesses with short reporting lags than for lines of business with long reporting lags.
The key assumptions used in calculating the most recent estimate of the loss reserves are reviewed each quarter and adjusted, to the extent necessary, to reflect the latest reported loss data, current trends and other factors observed.
21

The table below provides a reconciliation of the beginning and ending reserve balances:
June 30,
(In thousands) 2021 2020
Net reserves at beginning of period $ 11,620,393 $ 10,697,998
Cumulative effect adjustment resulting from changes in accounting principles — 5,927
Restated net reserves at beginning of period 11,620,393 10,703,925
Net provision for losses and loss expenses:
Claims occurring during the current year (1) 2,308,309 2,222,671
Increase in estimates for claims occurring in prior years (2) (3) 1,530 2,050
Loss reserve discount accretion 15,399 17,658
Total 2,325,238 2,242,379
Net payments for claims:
Current year 279,703 289,154
Prior years 1,485,116 1,545,471
Total 1,764,819 1,834,625
Foreign currency translation ( 16,153 ) ( 45,572 )
Net reserves at end of period 12,164,659 11,066,107
Ceded reserves at end of period 2,316,288 2,022,797
Gross reserves at end of period $ 14,480,947 $ 13,088,904
_______________________________________
(1) Claims occurring during the current year are net of loss reserve discounts of $ 10 million and $ 5 million for the six months ended June 30, 2021 and 2020, respectively.
(2) The change in estimates for claims occurring in prior years is net of loss reserve discount. On an undiscounted basis, the estimates for claims occurring in prior years decreased by $ 16 million and $ 8 million for the six months ended June 30, 2021 and 2020, respectively.
(3) For certain retrospectively rated insurance policies and reinsurance agreements, reserve development is offset by additional or return premiums. Favorable development, net of additional and return premiums, was $ 4 million and $ 7 million for the six months ended June 30, 2021 and 2020, respectively.
The COVID-19 global pandemic has impacted, and may further impact, the Company’s results through its effect on claim frequency and severity. Loss cost trends have been impacted and may be further impacted by COVID-19-related claims in certain lines of business. Losses incurred from COVID-19-related claims have been offset, to a certain extent, by lower claim frequency in certain lines of our businesses; however, as the economy and legal systems have reopened, the benefit of lower claim frequency has begun to abate. Although as populations have continued to be vaccinated against the virus and the effects of the pandemic have receded in many jurisdictions, most particularly the United States, it remains too early to determine the ultimate net impact of COVID-19 on the Company. New variants of the COVID-19 virus, including the “Delta” variant, and the slowing of vaccination rates among certain populations continue to create risks with respect to loss costs and the potential for renewed impact of the other effects of COVID-19 associated with economic conditions, inflation, and social distancing and work from home rules.
Most of the COVID-19-related claims reported to the Company to date involve certain short-tailed lines of business, including contingency and event cancellation, business interruption, and film production delay. The Company has also received COVID-19-related claims for longer-tailed casualty lines of business such as workers’ compensation and other liability; however, the estimated incurred loss impact for these reported claims are not material at this time. Given the continuing uncertainty regarding the pandemic's pervasiveness, the future impact that the pandemic may have on claim frequency and severity remains uncertain at this time.
The Company has estimated the potential COVID-19 impact to its contingency and event cancellation, workers’ compensation, and other lines of business under a number of possible scenarios; however, due to COVID-19’s continued evolving impact, there remains a high degree of uncertainty around the Company’s COVID-19 reserves. In addition, should the pandemic continue or worsen as a result of new COVID-19 variants or otherwise, governments in the jurisdictions where we operate may renew their efforts to expand policy coverage terms beyond the policy’s intended coverage. Accordingly, losses arising from these actions, and the other factors described above, could exceed the Company’s reserves established for those related policies.
As of June 30, 2021, the Company had recognized losses for COVID-19-related claims activity, net of reinsurance, of approximately $ 241 million, of which $ 208 million relates to the Insurance segment and $ 33 million relates to the Reinsurance
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& Monoline Excess segment. Such $ 241 million of COVID-19-related losses included $ 164 million of reported losses and $ 77 million of IBNR. For the six months ended June 30, 2021, the Company recognized current accident year losses for COVID-19-related claims activity, net of reinsurance, of approximately $ 40 million, of which $ 38 million relates to the Insurance segment and $ 2 million relates to the Reinsurance & Monoline Excess segment.
During the six months ended June 30, 2021, favorable prior year development (net of additional and return premiums) of $ 4 million included $ 12 million of favorable development for the Insurance segment, partially offset by $ 8 million of adverse development for the Reinsurance & Monoline Excess segment.
The overall favorable development for the Insurance segment was primarily attributable to favorable development on the 2020 accident year, partially offset by adverse development on the 2016 through 2019 accident years. The favorable development on the 2020 accident year was largely concentrated in the commercial auto liability and other liability lines of business. During 2020 the Company achieved larger rate increases in these lines of business than were contemplated in our budget and in our initial loss ratio selections. The Company also experienced significantly lower reported claim frequency in these lines in 2020 relative to historical averages, and lower reported incurred losses relative to our expectations. We believe that the lower claim frequency and lower reported incurred losses were caused by the impacts of the COVID-19 pandemic, for example, lockdowns, reduced driving and traffic, work from home, court closures, etc.; however, due to the ongoing uncertainty regarding the ultimate impacts of the pandemic on accident year 2020 incurred losses, the Company did not adjust its reserves due to these lower trends during 2020. However, as the accident year has begun to mature, the Company has recognized some of the favorable accident year 2020 experience in its ultimate loss picks made as of June 30, 2021. The adverse development on the 2016 through 2019 accident years is concentrated in the other liability line of business, and is driven by a larger number than expected of large losses reported. The large losses particularly impacted directors and officers liability and excess and surplus lines casualty classes of business.
The overall adverse development for the Reinsurance & Monoline Excess segment was mainly concentrated in the non-proportional reinsurance assumed liability and non-proportional reinsurance assumed property lines of business, related to accident years 2018 through 2020. The development was driven by higher than expected reported losses on excess of loss treaties written in the U.S. and U.K.
During the six months ended June 30, 2020, favorable prior year development (net of additional and return premiums) of $ 7 million included $ 12 million of favorable development for the Insurance segment, partially offset by $ 5 million of adverse development for the Reinsurance & Monoline Excess segment.
The overall favorable development for the Insurance segment was primarily attributable to favorable development on workers’ compensation business, partially offset by adverse development on professional liability business. The favorable workers’ compensation development was spread across many accident years, including prior to 2010, but was especially significant in accident year 2019. The favorable workers’ compensation development reflects a continuation of the benign loss cost trends experienced during recent years, particularly the favorable claim frequency trends (i.e., number of reported claims per unit of exposure). The Company's ongoing workers’ compensation claims management efforts, including active medical case management and use of networks and specialty vendors to control medical and pharmaceutical benefit costs, have also added to the favorable workers’ compensation prior year development. The adverse professional liability development was concentrated in accident years 2016 through 2018 and predominately resulted from a greater than expected number of large losses being reported in the period in two niches of our professional liability business.
The adverse development for the Reinsurance & Monoline Excess segment was mainly driven by non-proportional reinsurance assumed liability business written in the U.K., primarily from accident years 2014 through 2018. The development was driven by a greater than expected number of reported large losses during the period.

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(17) Fair Value of Financial Instruments
The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments:
June 30, 2021 December 31, 2020
(In thousands) Carrying Value Fair Value Carrying Value Fair Value
Assets:
Fixed maturity securities $ 15,653,508 $ 15,666,436 $ 14,159,369 $ 14,173,629
Equity securities 642,993 642,993 625,667 625,667
Arbitrage trading account 634,276 634,276 341,473 341,473
Loans receivable 116,009 117,510 84,913 86,596
Cash and cash equivalents 1,790,199 1,790,199 2,372,366 2,372,366
Trading account receivables from brokers and clearing organizations 361,586 361,586 524,727 524,727
Due from broker — — 2,585 2,585
Liabilities:
Due to broker 63,276 63,276 — —
Trading account securities sold but not yet purchased 190 190 10,048 10,048
Senior notes and other debt 1,911,753 2,176,756 1,623,025 1,892,444
Subordinated debentures 1,007,293 1,112,812 1,102,309 1,202,842
The estimated fair values of the Company’s fixed maturity securities, equity securities and arbitrage trading account securities are based on various valuation techniques that rely on fair value measurements as described in Note 15. The fair value of loans receivable are estimated by using current institutional purchaser yield requirements for loans with similar credit characteristics, which is considered a Level 2 input. The fair value of the senior notes and other debt and the subordinated debentures is based on spreads for similar securities, which is considered a Level 2 input.


(18) Premiums and Reinsurance Related Information
The following is a summary of insurance and reinsurance financial information:
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
(In thousands) 2021 2020 2021 2020
Written premiums:
Direct $ 2,395,114 $ 1,892,359 $ 4,572,276 $ 3,856,848
Assumed 266,122 239,887 573,672 506,769
Ceded ( 449,055 ) ( 392,428 ) ( 883,729 ) ( 777,953 )
Total net premiums written $ 2,212,181 $ 1,739,818 $ 4,262,219 $ 3,585,664
Earned premiums:
Direct $ 2,151,739 $ 1,804,844 $ 4,154,784 $ 3,634,558
Assumed 259,166 232,996 518,707 461,210
Ceded ( 439,281 ) ( 360,925 ) ( 851,911 ) ( 727,435 )
Total net premiums earned $ 1,971,624 $ 1,676,915 $ 3,821,580 $ 3,368,333
Ceded losses and loss expenses incurred $ 255,163 $ 232,873 $ 553,903 $ 468,055
Ceded commissions earned $ 106,834 $ 85,593 $ 208,515 $ 166,638
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The following table presents the rollforward of the allowance for expected credit losses for premiums and fees receivable for the six months ended June 30, 2021 and 2020:
(In thousands) 2021 2020
Allowance for expected credit losses, beginning of period $ 22,883 $ 19,823
Cumulative effect adjustment resulting from changes in accounting principles — 1,270
Provision for expected credit losses 1,925 1,013
Allowance for expected credit losses, end of period $ 24,808 $ 22,106
The following table presents the rollforward of the allowance for expected credit losses for premiums and fees receivable for the three months ended June 30, 2021 and 2020:
(In thousands) 2021 2020
Allowance for expected credit losses, beginning of period $ 24,264 $ 21,524
Provision for expected credit losses 544 582
Allowance for expected credit losses, end of period $ 24,808 $ 22,106
The Company reinsures a portion of its insurance exposures in order to reduce its net liability on individual risks and catastrophe losses. The Company also cedes premiums to state assigned risk plans and captive insurance companies. Estimated amounts due from reinsurers are reported net of an allowance for expected credit losses.
The following table presents the rollforward of the allowance for expected credit losses associated with due from reinsurers for the six months ended June 30, 2021 and 2020:
(In thousands) 2021 2020
Allowance for expected credit losses, beginning of period $ 7,801 $ 690
Cumulative effect adjustment resulting from changes in accounting principles — 5,927
Provision for expected credit losses ( 518 ) 558
Allowance for expected credit losses, end of period $ 7,283 $ 7,175
The following table presents the rollforward of the allowance for expected credit losses associated with due from reinsurers for the three months ended June 30, 2021 and 2020:
(In thousands) 2021 2020
Allowance for expected credit losses, beginning of period $ 7,373 $ 6,800
Provision for expected credit losses ( 90 ) 375
Allowance for expected credit losses, end of period $ 7,283 $ 7,175

(19) Restricted Stock Units
Pursuant to its stock incentive plan, the Company may issue restricted stock units ("RSUs") to employees of the Company and its subsidiaries. The RSUs generally vest three to five years from the award date and are subject to other vesting and forfeiture provisions contained in the award agreement. RSUs are expensed pro-ratably over the vesting period. RSU expenses were $ 23 million for both the six months ended June 30, 2021 and 2020. A summary of RSUs issued in the six months ended June 30, 2021 and 2020 follows:
($ in thousands)
Units Fair Value
2021 1,531 $ 75
2020 724 $ 57

(20) Litigation and Contingent Liabilities
In the ordinary course of business, the Company is subject to disputes, litigation and arbitration arising from its insurance and reinsurance businesses. These matters are generally related to insurance and reinsurance claims and are considered in the establishment of loss and loss expense reserves. In addition, the Company may also become involved in legal actions which seek extra-contractual damages, punitive damages or penalties, including claims alleging bad faith in handling of
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insurance claims. The Company expects its ultimate liability with respect to such matters will not be material to its financial condition. However, adverse outcomes on such matters are possible, from time to time, and could be material to the Company’s results of operations in any particular financial reporting period.

(21) Leases
Lessees are required to recognize a right-of-use asset and a lease liability for leases with terms of more than 12 months on the balance sheet. All leases disclosed within this footnote are classified as operating leases. Recognized right-of-use asset and lease liability are reported within other assets and other liabilities, respectively, in the consolidated balance sheet. Lease expense is reported in other operating costs and expenses in the consolidated statement of income and accounted for on a straight-line basis over the lease term.
To determine the discount rate used to calculate present value of future minimum lease payments, the Company uses its incremental borrowing rate during the lease commencement period in line with the respective lease duration. In certain cases, the Company has the option to renew the lease. Lease renewal future payments are included in the present value of the future minimum lease payments when the Company determines it is reasonably certain to renew.
The main leases entered into by the Company are for office space used by the Company’s operating units across the world. Additionally, the Company, to a lesser extent, has equipment leases mainly for office equipment. Further information relating to operating lease expense and other operating lease information are as follows:
For the Three Months Ended
June 30, 		For the Six Months Ended June 30,
(In thousands) 2021 2020 2021 2020
Leases:
Lease cost $ 11,429 $ 10,878 $ 22,693 $ 22,114
Cash paid for amounts included in the measurement of lease liabilities reported in operating cash flows $ 11,920 $ 11,479 $ 23,297 $ 22,309
Right-of-use assets (reduced) obtained in exchange for new lease liabilities $ ( 181 ) $ 2,682 $ ( 151 ) $ 4,294

As of June 30,
($ in thousands) 2021 2020
Right-of-use assets $ 148,455 $ 180,011
Lease liabilities $ 185,738 $ 219,444
Weighted-average remaining lease term 6.7 years 6.8 years
Weighted-average discount rate 5.95 % 5.94 %
Contractual maturities of the Company’s future minimum lease payments are as follows:
(In thousands) June 30, 2021
Contractual Maturities:
2021 $ 22,960
2022 42,677
2023 39,081
2024 32,467
2025 23,227
Thereafter 59,736
Total undiscounted future minimum lease payments 220,148
Less: Discount impact ( 34,410 )
Total lease liability $ 185,738
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(22) Business Segments
The Company’s reportable segments include the following two business segments, plus a corporate segment:
• Insurance - predominantly commercial insurance business, including excess and surplus lines, admitted lines and specialty personal lines throughout the United States, as well as insurance business in the United Kingdom, Continental Europe, South America, Canada, Mexico, Scandinavia, Asia and Australia.
• Reinsurance & Monoline Excess - reinsurance business on a facultative and treaty basis, primarily in the United States, the United Kingdom, Continental Europe, Australia, the Asia-Pacific Region and South Africa, as well as operations that solely retain risk on an excess basis.
The accounting policies of the segments are the same as those described in the summary of significant accounting policies. Income tax expense and benefits are calculated based upon the Company's overall effective tax rate.
Summary financial information about the Company's reporting segments is presented in the following tables. Income (loss) before income taxes by segment includes allocated investment income. Identifiable assets by segment are those assets used in or allocated to the operation of each segment.
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Revenues
(In thousands) Earned
Premiums (1) 		Investment
Income 		Other Total (2) Pre-Tax Income (Loss) Net Income (Loss) to Common Stockholders
Three months ended June 30, 2021
Insurance $ 1,727,202 $ 116,703 $ 8,212 $ 1,852,117 $ 291,290 $ 230,313
Reinsurance & Monoline Excess 244,422 46,879 — 291,301 74,794 59,334
Corporate, other and eliminations (3) — 4,605 124,000 128,604 ( 90,208 ) ( 71,209 )
Net investment gains — — 24,064 24,064 24,064 18,800
Total $ 1,971,624 $ 168,187 $ 156,276 $ 2,296,086 $ 299,940 $ 237,238
Three months ended June 30, 2020
Insurance $ 1,465,044 $ 44,105 $ 8,018 $ 1,517,167 $ 76,546 $ 48,607
Reinsurance & Monoline Excess 211,871 23,461 — 235,332 12,566 10,689
Corporate, other and eliminations (3) — 17,865 87,777 105,642 ( 61,548 ) ( 47,823 )
Net investment gains — — 77,885 77,885 77,885 59,787
Total $ 1,676,915 $ 85,431 $ 173,680 $ 1,936,026 $ 105,449 $ 71,260
Six months ended June 30, 2021
Insurance $ 3,332,181 $ 221,941 $ 16,490 $ 3,570,612 $ 548,399 $ 429,022
Reinsurance & Monoline Excess 489,399 84,587 — 573,986 143,443 113,806
Corporate, other and eliminations (3) — 20,236 229,218 249,454 ( 154,737 ) ( 123,817 )
Net investment gains — — 58,903 58,903 58,903 47,752
Total $ 3,821,580 $ 326,764 $ 304,611 $ 4,452,955 $ 596,008 $ 466,763
Six Months Ended June 30, 2020
Insurance $ 2,949,999 $ 167,564 $ 16,490 $ 3,134,053 $ 252,493 $ 185,467
Reinsurance & Monoline Excess 418,334 61,171 — 479,505 49,080 39,877
Corporate, other and eliminations (3) — 31,459 200,907 232,366 ( 103,302 ) ( 81,689 )
Net investment losses — — ( 99,289 ) ( 99,289 ) ( 99,289 ) ( 76,813 )
Total $ 3,368,333 $ 260,194 $ 118,108 $ 3,746,635 $ 98,982 $ 66,842
_________________
(1) Certain amounts included in earned premiums of each segment are related to inter-segment transactions.
(2) Revenues for Insurance from foreign countries for the three months ended June 30, 2021 and 2020 were $ 221 million and $ 149 million, respectively, and for the six months ended June 30, 2021 and 2020 were $ 418 million and $ 317 million, respectively. Revenues for Reinsurance & Monoline Excess from foreign countries for the three months ended June 30, 2021 and 2020 were $ 90 million and $ 65 million, respectively, and for the six months ended June 30, 2021 and 2020 were $ 178 million and $ 134 million, respectively.
(3) Corporate, other and eliminations represent corporate revenues and expenses that are not allocated to business segments .
Identifiable Assets
(In thousands) June 30,
2021 		December 31,
2020
Insurance $ 22,771,988 $ 21,702,328
Reinsurance & Monoline Excess 4,670,226 4,654,158
Corporate, other and eliminations 2,855,703 2,215,479
Consolidated $ 30,297,917 $ 28,571,965

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Net premiums earned by major line of business are as follows:
For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
(In thousands) 2021 2020 2021 2020
Insurance:
Other liability $ 638,404 $ 544,465 $ 1,240,306 $ 1,091,594
Short-tail lines (1) 339,890 295,968 664,630 591,446
Workers' compensation 291,471 278,699 558,920 580,299
Commercial automobile 237,444 190,335 458,205 379,978
Professional liability 219,993 155,577 410,120 306,682
Total Insurance 1,727,202 1,465,044 3,332,181 2,949,999
Reinsurance & Monoline Excess:
Casualty reinsurance 152,531 130,459 302,169 253,190
Monoline excess (2) 48,247 41,062 94,120 83,224
Property reinsurance 43,644 40,350 93,110 81,920
Total Reinsurance & Monoline Excess 244,422 211,871 489,399 418,334
Total $ 1,971,624 $ 1,676,915 $ 3,821,580 $ 3,368,333
______________
(1) Short-tail lines include commercial multi-peril (non-liability), inland marine, accident and health, fidelity and surety, boiler and machinery and other lines.
(2) Monoline excess includes operations that solely retain risk on an excess basis.

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SAFE HARBOR STATEMENT
This is a “Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995. Any forward-looking statements contained herein, including statements related to our outlook for the industry and for our performance for the year 2021 and beyond, are based upon the Company’s historical performance and on current plans, estimates and expectations. The inclusion of this forward-looking information should not be regarded as a representation by us or any other person that the future plans, estimates or expectations contemplated by us will be achieved. They are subject to various risks and uncertainties, including but not limited to: the cyclical nature of the property casualty industry; the impact of significant competition, including new entrants to the industry; the long-tail and potentially volatile nature of the insurance and reinsurance business; product demand and pricing; claims development and the process of estimating reserves; investment risks, including those of our portfolio of fixed maturity securities and investments in equity securities, including investments in financial institutions, municipal bonds, mortgage-backed securities, loans receivable, investment funds, including real estate, merger arbitrage, energy related and private equity investments; the effects of emerging claim and coverage issues; the uncertain nature of damage theories and loss amounts, including claims for cybersecurity-related risks; natural and man-made catastrophic losses, including as a result of terrorist activities; the ongoing COVID-19 pandemic; the impact of climate change, which may alter the frequency and increase the severity of catastrophe events; general economic and market activities, including inflation, interest rates, and volatility in the credit and capital markets; the impact of the conditions in the financial markets and the global economy, and the potential effect of legislative, regulatory, accounting or other initiatives taken in response, on our results and financial condition; foreign currency and political risks (including those associated with the United Kingdom's withdrawal from the European Union, or "Brexit") relating to our international operations; our ability to attract and retain key personnel and qualified employees; continued availability of capital and financing; the success of our new ventures or acquisitions and the availability of other opportunities; the availability of reinsurance; our retention under the Terrorism Risk Insurance Program Reauthorization Act of 2019; the ability or willingness of our reinsurers to pay reinsurance recoverables owed to us; other legislative and regulatory developments, including those related to business practices in the insurance industry; credit risk related to our policyholders, independent agents and brokers; changes in the ratings assigned to us or our insurance company subsidiaries by rating agencies; the availability of dividends from our insurance company subsidiaries; potential difficulties with technology and/or cyber security issues; the effectiveness of our controls to ensure compliance with guidelines, policies and legal and regulatory standards; and other risks detailed from time to time in the Company’s filings with the Securities and Exchange Commission.
These risks and uncertainties could cause our actual results for the year 2021 and beyond to differ materially from those expressed in any forward-looking statement we make. Any projections of growth in our revenues would not necessarily result in commensurate levels of earnings. Our future financial performance is dependent upon factors discussed in our Annual Report on Form 10-K, elsewhere in this Form 10-Q and our other SEC filings. Forward-looking statements speak only as of the date on which they are made. Except to the extent required by applicable laws, the Company does not undertake any obligation to update or revise any forward-looking statement, whether as a result of new information, future developments or otherwise.

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Item 2 . Management’s Discussion and Analysis of Financial Condition and Results of Operations

Overview
W. R. Berkley Corporation is an insurance holding company that is among the largest commercial lines writers in the United States and operates worldwide in two segments of the property and casualty business: Insurance and Reinsurance & Monoline Excess. Our decentralized structure provides us with the flexibility to respond quickly and efficiently to local or specific market conditions and to pursue specialty business niches. It also allows us to be closer to our customers in order to better understand their individual needs and risk characteristics. While providing our business units with certain operating autonomy, our structure allows us to capitalize on the benefits of economies of scale through centralized capital, investment, reinsurance, enterprise risk management, and actuarial, financial and corporate legal staff support. The Company’s primary sources of revenues and earnings are its insurance operations and its investments.
An important part of our strategy is to form new operating units to capitalize on various business opportunities. Over the years, the Company has formed numerous operating units that are focused on important parts of the economy in the U.S., including healthcare, cyber security, energy and agriculture, and on growing international markets, including the Asia-Pacific region, South America and Mexico.
The profitability of the Company’s insurance business is affected primarily by the adequacy of premium rates. The ultimate adequacy of premium rates is not known with certainty at the time an insurance policy is issued because premiums are determined before claims are reported. The ultimate adequacy of premium rates is affected mainly by the severity and frequency of claims, which are influenced by many factors, including natural and other disasters, regulatory measures and court decisions that define and change the extent of coverage and the effects of economic inflation on the amount of compensation for injuries or losses. General insurance prices are also influenced by available insurance capacity, i.e., the level of capital employed in the industry, and the industry’s willingness to deploy that capital.
The Company’s profitability is also affected by its investment income and investment gains. The Company’s invested assets are invested principally in fixed maturity securities. The return on fixed maturity securities is affected primarily by general interest rates, as well as the credit quality and duration of the securities. Returns available on fixed maturity investments have been at low levels for an extended period.
The Company also invests in equity securities, merger arbitrage securities, investment funds, private equity, loans and real estate related assets. The Company's investments in investment funds and its other alternative investments have experienced, and the Company expects to continue to experience, greater fluctuations in investment income. The Company's share of the earnings or losses from investment funds is generally reported on a one-quarter lag in order to facilitate the timely completion of the Company's consolidated financial statements.
The COVID-19 pandemic, including the related impact on the U.S. and global economies, has adversely affected our results of operations. For the six months ended June 30, 2021, the Company recorded approximately $40 million for current accident year COVID-19-related losses, net of reinsurance. At the same time, COVID-19 has led to reduced loss frequency in certain lines of business (which has begun a return to pre-pandemic levels as many economies and legal systems have reopened as a result of populations becoming vaccinated). The ultimate impact of COVID-19 on the economy and the Company’s results of operations, financial position and liquidity is not within the Company’s control and unclear due to, among other factors, uncertainty in connection with its claims, reserves and reinsurance recoverables.
The scope, duration and magnitude of the direct and indirect effects of COVID-19 continue to evolve in ways that are difficult or impossible to anticipate. While many of the potential impacts on the Company have receded as populations have begun to become vaccinated, new variants of the COVID-19 virus, including the “Delta” variant, and the slowing of vaccination rates among certain populations, continue to create risks to the Company. As a result, the impact of COVID-19 on the Company’s results of operations for the first six months of 2021 is not necessarily indicative of its impact for the remainder of 2021 or beyond. Despite the effects of COVID-19 to date, the Company’s financial position and liquidity improved for the six months ended June 30, 2021.

Critical Accounting Estimates
The following presents a discussion of accounting policies and estimates relating to reserves for losses and loss expenses, assumed premiums and allowance for expected credit losses on investments. Management believes these policies and estimates are the most critical to its operations and require the most difficult, subjective and complex judgments.
Reserves for Losses and Loss Expenses . To recognize liabilities for unpaid losses, either known or unknown, insurers establish reserves, which is a balance sheet account representing estimates of future amounts needed to pay claims and
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related expenses with respect to insured events which have occurred. Estimates and assumptions relating to reserves for losses and loss expenses are based on complex and subjective judgments, often including the interplay of specific uncertainties with related accounting and actuarial measurements. Such estimates are also susceptible to change as significant periods of time may elapse between the occurrence of an insured loss, the report of the loss to the insurer, the ultimate determination of the cost of the loss and the insurer’s payment of that loss.
In general, when a claim is reported, claims personnel establish a “case reserve” for the estimated amount of the ultimate payment based upon known information about the claim at that time. The estimate represents an informed judgment based on general reserving practices and reflects the experience and knowledge of the claims personnel regarding the nature and value of the specific type of claim. Reserves are also established on an aggregate basis to provide for losses incurred but not reported (“IBNR”) to the insurer, potential inadequacy of case reserves and the estimated expenses of settling claims, including legal and other fees and general expenses of administrating the claims adjustment process. Reserves are established based upon the then current legal interpretation of coverage provided.
In examining reserve adequacy, several factors are considered in estimating the ultimate economic value of losses. These factors include, among other things, historical data, legal developments, changes in social attitudes and economic conditions, including the effects of inflation. The actuarial process relies on the basic assumption that past experience, adjusted judgmentally for the effects of current developments and anticipated trends, is an appropriate basis for predicting future outcomes. Reserve amounts are based on management’s informed estimates and judgments using currently available data. As additional experience and other data become available and are reviewed, these estimates and judgments may be revised. This may result in reserve increases or decreases that would be reflected in our results in periods in which such estimates and assumptions are changed.
Reserves do not represent an exact calculation of liability. Rather, reserves represent an estimate of what management expects the ultimate settlement and claim administration will cost. While the methods for establishing reserves are well tested over time, some of the major assumptions about anticipated loss emergence patterns are subject to uncertainty. These estimates, which generally involve actuarial projections, are based on management’s assessment of facts and circumstances then known, as well as estimates of trends in claims severity and frequency, judicial theories of liability and other factors, including the actions of third parties which are beyond the Company’s control. These variables are affected by external and internal events, such as inflation and economic volatility, judicial and litigation trends, reinsurance coverage, legislative changes and claim handling and reserving practices, which make it more difficult to accurately predict claim costs. The inherent uncertainties of estimating reserves are greater for certain types of liabilities where long periods of time elapse before a definitive determination of liability is made. Because setting reserves is inherently uncertain, the Company cannot provide assurance that its current reserves will prove adequate in light of subsequent events.
Loss reserves included in the Company’s financial statements represent management’s best estimates based upon an actuarially derived point estimate and other considerations. The Company uses a variety of actuarial techniques and methods to derive an actuarial point estimate for each operating unit. These methods include paid loss development, incurred loss development, paid and incurred Bornhuetter-Ferguson methods and frequency and severity methods. In circumstances where one actuarial method is considered more credible than the others, that method is used to set the point estimate. For example, the paid loss and incurred loss development methods rely on historical paid and incurred loss data. For new lines of business, where there is insufficient history of paid and incurred claims data, or in circumstances where there have been significant changes in claim practices, the paid and incurred loss development methods would be less credible than other actuarial methods. The actuarial point estimate may also be based on a judgmental weighting of estimates produced from each of the methods considered. Industry loss experience is used to supplement the Company’s own data in selecting “tail factors” and in areas where the Company’s own data is limited. The actuarial data is analyzed by line of business, coverage and accident or policy year, as appropriate, for each operating unit.
The establishment of the actuarially derived loss reserve point estimate also includes consideration of qualitative factors that may affect the ultimate losses. These qualitative considerations include, among others, the impact of re-underwriting initiatives, changes in the mix of business, changes in distribution sources and changes in policy terms and conditions. Examples of changes in terms and conditions that can have a significant impact on reserve levels are the use of aggregate policy limits, the expansion of coverage exclusions, whether or not defense costs are within policy limits, and changes in deductibles and attachment points.
The key assumptions used to arrive at the best estimate of loss reserves are the expected loss ratios, rate of loss cost inflation, and reported and paid loss emergence patterns. Expected loss ratios represent management’s expectation of losses at the time the business is written, before any actual claims experience has emerged. This expectation is a significant determinant of the estimate of loss reserves for recently written business where there is little paid or incurred loss data to consider. Expected loss ratios are generally derived from historical loss ratios adjusted for the impact of rate changes, loss cost trends and known
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changes in the type of risks underwritten. Expected loss ratios are estimated for each key line of business within each operating unit. Expected loss cost inflation is particularly important for the long-tail lines, such as excess casualty, and claims with a high medical component, such as workers’ compensation. Reported and paid loss emergence patterns are used to project current reported or paid loss amounts to their ultimate settlement value. Loss development factors are based on the historical emergence patterns of paid and incurred losses, and are derived from the Company’s own experience and industry data. The paid loss emergence pattern is also significant to excess and assumed workers’ compensation reserves because those reserves are discounted to their estimated present value based upon such estimated payout patterns. Management believes the estimates and assumptions it makes in the reserving process provide the best estimate of the ultimate cost of settling claims and related expenses with respect to insured events which have occurred; however, different assumptions and variables could lead to significantly different reserve estimates.
Loss frequency and severity are measures of loss activity that are considered in determining the key assumptions described in our discussion of loss and loss expense reserves, including expected loss ratios, rate of loss cost inflation and reported and paid loss emergence patterns. Loss frequency is a measure of the number of claims per unit of insured exposure, and loss severity is a measure of the average size of claims. Factors affecting loss frequency include the effectiveness of loss controls and safety programs and changes in economic activity or weather patterns. Factors affecting loss severity include changes in policy limits, retentions, rate of inflation and judicial interpretations.
Another factor affecting estimates of loss frequency and severity is the loss reporting lag, which is the period of time between the occurrence of a loss and the date the loss is reported to the Company. The length of the loss reporting lag affects our ability to accurately predict loss frequency (loss frequencies are more predictable for lines with short reporting lags) as well as the amount of reserves needed for incurred but not reported losses (less IBNR is required for lines with short reporting lags). As a result, loss reserves for lines with short reporting lags are likely to have less variation from initial loss estimates. For lines with short reporting lags, which include commercial automobile, primary workers’ compensation, other liability (claims-made) and property business, the key assumption is the loss emergence pattern used to project ultimate loss estimates from known losses paid or reported to date. For lines of business with long reporting lags, which include other liability (occurrence), products liability, excess workers’ compensation and liability reinsurance, the key assumption is the expected loss ratio since there is often little paid or incurred loss data to consider. Historically, the Company has experienced less variation from its initial loss estimates for lines of businesses with short reporting lags than for lines of business with long reporting lags.
The key assumptions used in calculating the most recent estimate of the loss reserves are reviewed each quarter and adjusted, to the extent necessary, to reflect the latest reported loss data, current trends and other factors observed. If the actual level of loss frequency and severity are higher or lower than expected, the ultimate losses will be different than management’s estimate. The following table reflects the impact of changes (which could be favorable or unfavorable) in frequency and severity, relative to our assumptions, on our loss estimate for claims occurring in 2020:
(In thousands) Frequency (+/-)
Severity (+/-) 1% 5% 10%
1% $ 89,102 $ 268,193 $ 492,056
5% 268,193 454,376 687,105
10% 492,056 687,105 930,917
Our net reserves for losses and loss expenses of approximately $12.2 billion as of June 30, 2021 relate to multiple accident years. Therefore, the impact of changes in frequency or severity for more than one accident year could be higher or lower than the amounts reflected above. The impact of such changes would likely be manifested gradually over the course of many years, as the magnitude of the changes became evident.
Approximately $2.7 billion, or 22%, of the Company’s net loss reserves as of June 30, 2021 relate to the Reinsurance & Monoline Excess segment. There is a higher degree of uncertainty and greater variability regarding estimates of excess workers' compensation and assumed reinsurance loss reserves. In the case of excess workers’ compensation, our policies generally attach at $1 million or higher. The claims which reach our layer therefore tend to involve the most serious injuries and many remain open for the lifetime of the claimant, which extends the claim settlement tail. These claims also occur less frequently but tend to be larger than primary claims, which increases claim variability. In the case of assumed reinsurance our loss reserve estimates are based, in part, upon information received from ceding companies. If information received from ceding companies is not timely or correct, the Company’s estimate of ultimate losses may not be accurate. Furthermore, due to delayed reporting of claim information by ceding companies, the claim settlement tail for assumed reinsurance is also extended. Management considers the impact of delayed reporting and the extended tail in its selection of loss development factors for these lines of business.
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Information received from ceding companies is used to set initial expected loss ratios, to establish case reserves and to estimate reserves for incurred but not reported losses on assumed reinsurance business. This information, which is generally provided through reinsurance intermediaries, is gathered through the underwriting process and from periodic claim reports and other correspondence with ceding companies. The Company performs underwriting and claim audits of selected ceding companies to determine the accuracy and completeness of information provided to the Company. The information received from the ceding companies is supplemented by the Company’s own loss development experience with similar lines of business as well as industry loss trends and loss development benchmarks.
Following is a summary of the Company’s reserves for losses and loss expenses by business segment:
(In thousands) June 30,
2021 		December 31,
2020
Insurance $ 9,507,305 $ 9,034,969
Reinsurance & Monoline Excess 2,657,354 2,585,424
Net reserves for losses and loss expenses 12,164,659 11,620,393
Ceded reserves for losses and loss expenses 2,316,288 2,164,037
Gross reserves for losses and loss expenses $ 14,480,947 $ 13,784,430

Following is a summary of the Company’s net reserves for losses and loss expenses by major line of business:
(In thousands) Reported Case
Reserves 		Incurred But
Not Reported 		Total
June 30, 2021
Other liability $ 1,673,040 $ 2,998,980 $ 4,672,020
Workers’ compensation (1) 993,429 871,719 1,865,148
Professional liability 430,557 973,725 1,404,282
Commercial automobile 449,611 404,732 854,343
Short-tail lines (2) 297,384 414,128 711,512
Total Insurance 3,844,021 5,663,284 9,507,305
Reinsurance & Monoline Excess (1) (3) 1,473,208 1,184,146 2,657,354
Total $ 5,317,229 $ 6,847,430 $ 12,164,659
December 31, 2020
Other liability $ 1,534,514 $ 2,864,760 $ 4,399,274
Workers’ compensation (1) 977,035 873,072 1,850,107
Professional liability 414,104 875,163 1,289,267
Commercial automobile 442,975 398,688 841,663
Short-tail lines (2) 295,313 359,345 654,658
Total Insurance 3,663,941 5,371,028 9,034,969
Reinsurance & Monoline Excess (1) (3) 1,442,099 1,143,325 2,585,424
Total $ 5,106,040 $ 6,514,353 $ 11,620,393
___________
(1) Reserves for workers’ compensation and Reinsurance & Monoline Excess are net of an aggregate net discount of $472 million and $483 million as of June 30, 2021 and December 31, 2020, respectively.
(2) Short-tail lines include commercial multi-peril (non-liability), inland marine, accident and health, fidelity and surety, boiler and machinery and other lines.
(3) Reinsurance & Monoline Excess includes property and casualty reinsurance, as well as operations that solely retain risk on an excess basis.
The Company evaluates reserves for losses and loss adjustment expenses on a quarterly basis. Changes in estimates of prior year losses are reported when such changes are made. The changes in prior year loss reserve estimates are generally the result of ongoing analysis of recent loss development trends. Original estimates are increased or decreased as additional information becomes known regarding individual claims and aggregate claim trends.
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Certain of the Company's insurance and reinsurance contracts are retrospectively rated, whereby the Company collects more or less premiums based on the level of loss activity. For those contracts, changes in loss and loss adjustment expenses for prior years may be fully or partially offset by additional or return premiums.
Net prior year development (i.e., the sum of prior year reserve changes and prior year earned premiums changes) for the six months ended June 30, 2021 and 2020 are as follows:
(In thousands) 2021 2020
Net increase in prior year loss reserves $ (1,530) $ (2,050)
Increase in prior year earned premiums 5,384 9,077
Net favorable prior year development $ 3,854 $ 7,027
The COVID-19 global pandemic has impacted, and may further impact, the Company’s results through its effect on claim frequency and severity. Loss cost trends have been impacted and may be further impacted by COVID-19-related claims in certain lines of business. Losses incurred from COVID-19-related claims have been offset, to a certain extent, by lower claim frequency in certain lines of our businesses; however, as the economy and legal systems have reopened, the benefit of lower claim frequency has begun to abate. Although as populations have continued to be vaccinated against the virus and the effects of the pandemic have receded in many jurisdictions, most particularly the United States, it remains too early to determine the ultimate net impact of COVID-19 on the Company. New variants of the COVID-19 virus, including the “Delta” variant, and the slowing of vaccination rates among certain populations continue to create risks with respect to loss costs and the potential for renewed impact of the other effects of COVID-19 associated with economic conditions, inflation, and social distancing and work from home rules.
Most of the COVID-19-related claims reported to the Company to date involve certain short-tailed lines of business, including contingency and event cancellation, business interruption, and film production delay. The Company has also received COVID-19-related claims for longer-tailed casualty lines of business such as workers’ compensation and other liability; however, the estimated incurred loss impact for these reported claims are not material at this time. Given the continuing uncertainty regarding the pandemic's pervasiveness, the future impact that the pandemic may have on claim frequency and severity remains uncertain at this time.
The Company has estimated the potential COVID-19 impact to its contingency and event cancellation, workers’ compensation, and other lines of business under a number of possible scenarios; however, due to COVID-19’s continued evolving impact, there remains a high degree of uncertainty around the Company’s COVID-19 reserves. In addition, should the pandemic continue or worsen as a result of new COVID-19 variants or otherwise, governments in the jurisdictions where we operate may renew their efforts to expand policy coverage terms beyond the policy’s intended coverage. Accordingly, losses arising from these actions, and the other factors described above, could exceed the Company’s reserves established for those related policies.
As of June 30, 2021, the Company had recognized losses for COVID-19-related claims activity, net of reinsurance, of approximately $241 million, of which $208 million relates to the Insurance segment and $33 million relates to the Reinsurance & Monoline Excess segment. Such $241 million of COVID-19-related losses included $164 million of reported losses and $77 million of IBNR. For the six months ended June 30, 2021, the Company recognized current accident year losses for COVID-19-related claims activity, net of reinsurance, of approximately $40 million, of which $38 million relates to the Insurance segment and $2 million relates to the Reinsurance & Monoline Excess segment.
During the six months ended June 30, 2021, favorable prior year development (net of additional and return premiums) of $4 million included $12 million of favorable development for the Insurance segment, partially offset by $8 million of adverse development for the Reinsurance & Monoline Excess segment.
The overall favorable development for the Insurance segment was primarily attributable to favorable development on the 2020 accident year, partially offset by adverse development on the 2016 through 2019 accident years. The favorable development on the 2020 accident year was largely concentrated in the commercial auto liability and other liability lines of business. During 2020 the Company achieved larger rate increases in these lines of business than were contemplated in our budget and in our initial loss ratio selections. The Company also experienced significantly lower reported claim frequency in these lines in 2020 relative to historical averages, and lower reported incurred losses relative to our expectations. We believe that the lower claim frequency and lower reported incurred losses were caused by the impacts of the COVID-19 pandemic, for example, lockdowns, reduced driving and traffic, work from home, court closures, etc.; however, due to the ongoing uncertainty regarding the ultimate impacts of the pandemic on accident year 2020 incurred losses, the Company did not adjust its reserves due to these lower trends during 2020. However, as the accident year has begun to mature, the Company has recognized some of the favorable accident year 2020 experience in its ultimate loss picks made as of June 30, 2021. The adverse development on the 2016 through 2019 accident years is concentrated in the other liability line of business, and is driven by a larger number
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than expected of large losses reported. The large losses particularly impacted directors and officers liability and excess and surplus lines casualty classes of business.
The overall adverse development for the Reinsurance & Monoline Excess segment was mainly concentrated in the non-proportional reinsurance assumed liability and non-proportional reinsurance assumed property lines of business, related to accident years 2018 through 2020. The development was driven by higher than expected reported losses on excess of loss treaties written in the U.S. and U.K.
During the six months ended June 30, 2020, favorable prior year development (net of additional and return premiums) of $7 million included $12 million of favorable development for the Insurance segment, partially offset by $5 million of adverse development for the Reinsurance & Monoline Excess segment.
The overall favorable development for the Insurance segment was primarily attributable to favorable development on workers’ compensation business, partially offset by adverse development on professional liability business. The favorable workers’ compensation development was spread across many accident years, including prior to 2010, but was especially significant in accident year 2019. The favorable workers’ compensation development reflects a continuation of the benign loss cost trends experienced during recent years, particularly the favorable claim frequency trends (i.e., number of reported claims per unit of exposure). The Company's ongoing workers’ compensation claims management efforts, including active medical case management and use of networks and specialty vendors to control medical and pharmaceutical benefit costs, have also added to the favorable workers’ compensation prior year development. The adverse professional liability development was concentrated in accident years 2016 through 2018 and predominately resulted from a greater than expected number of large losses being reported in the period in two niches of our professional liability business.
The adverse development for the Reinsurance & Monoline Excess segment was mainly driven by non-proportional reinsurance assumed liability business written in the U.K., primarily from accident years 2014 through 2018. The development was driven by a greater than expected number of reported large losses during the period.
Reserve Discount . The Company discounts its liabilities for certain workers’ compensation reserves. The amount of workers’ compensation reserves that were discounted was $1,406 million and $1,655 million at June 30, 2021 and December 31, 2020, respectively. The aggregate net discount for those reserves, after reflecting the effects of ceded reinsurance, was $472 million and $483 million at June 30, 2021 and December 31, 2020, respectively. At June 30, 2021, discount rates by year ranged from 0.7% to 6.5%, with a weighted average discount rate of 3.5%.
Substantially all of the workers’ compensation discount (97% of total discounted reserves at June 30, 2021) relates to excess workers’ compensation reserves. In order to properly match loss expenses with income earned on investment securities supporting the liabilities, reserves for excess workers’ compensation business are discounted using risk-free discount rates determined by reference to the U.S. Treasury yield curve. These rates are determined annually based on the weighted average rate for the period. Once established, no adjustments are made to the discount rate for that period, and any increases or decreases in loss reserves in subsequent years are discounted at the same rate, without regard to when any such adjustments are recognized. The expected loss and loss expense payout patterns subject to discounting are derived from the Company’s loss payout experience.
The Company also discounts reserves for certain other long-duration workers’ compensation reserves (representing approximately 3% of total discounted reserves at June 30, 2021), including reserves for quota share reinsurance and reserves related to losses regarding occupational lung disease. These reserves are discounted at statutory rates permitted by the Department of Insurance of the State of Delaware.
Assumed Reinsurance Premiums . The Company estimates the amount of assumed reinsurance premiums that it will receive under treaty reinsurance agreements at the inception of the contracts. These premium estimates are revised as the actual amount of assumed premiums is reported to the Company by the ceding companies. As estimates of assumed premiums are made or revised, the related amount of earned premiums, commissions and incurred losses associated with those premiums are recorded. Estimated assumed premiums receivable were approximately $54 million at June 30, 2021 and $44 million at December 31, 2020. The assumed premium estimates are based upon terms set forth in reinsurance agreements, information received from ceding companies during the underwriting and negotiation of agreements, reports received from ceding companies and discussions and correspondence with reinsurance intermediaries. The Company also considers its own view of market conditions, economic trends and experience with similar lines of business. These premium estimates represent management’s best estimate of the ultimate amount of premiums to be received under its assumed reinsurance agreements.
Allowance for Expected Credit Losses on Investments .
Fixed Maturity Securities – For fixed maturity securities in an unrealized loss position where the Company intends to sell, or it is more likely than not that it will be required to sell the security before recovery in value, the amortized cost basis is written down to fair value through net investment gains (losses). For fixed maturity securities in an unrealized loss position
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where the Company does not intend to sell, or it is more likely than not that it will not be required to sell the security before recovery in value, the Company evaluates whether the decline in fair value has resulted from credit losses or all other factors (non-credit factors). In making this assessment, the Company considers the extent to which fair value is less than amortized cost, changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. If this assessment indicates that a credit loss exists, the present value of cash flows expected to be collected from the security are compared to the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis, an allowance for expected credit losses is recorded for the credit loss through net investment gains (losses), limited by the amount that the fair value is less than the amortized cost basis. Effective January 1, 2020, the allowance is adjusted for any change in expected credit losses and subsequent recoveries through net investment gains (losses). The impairment related to non-credit factors is recognized in other comprehensive income (loss).
The Company’s credit assessment of allowance for expected credit losses uses a third party model for available for sale and held to maturity securities, as well as loans receivable. The allowance for expected credit losses is generally based on the performance of the underlying collateral under various economic and default scenarios that involve subjective judgments and estimates by management. Modeling these securities involves various factors, such as projected default rates, the nature and realizable value of the collateral, if any, the ability of the issuer to make scheduled payments, historical performance and other relevant economic and performance factors. A discounted cash flow analysis is used to ascertain the amount of the allowance for expected credit losses, if any. In general, the model reverts to the rating-level long-term average marginal default rates based on 10 years of historical data, beyond the forecast period. For other inputs, the model in most cases reverts to the baseline long-term assumptions linearly over 5 years beyond the forecast period. The long-term assumptions are based on the historical averages.
The Company classifies its fixed maturity securities by credit rating, primarily based on ratings assigned by credit rating agencies. For purposes of classifying securities with different ratings, the Company uses the average of the credit ratings assigned, unless in limited situations the Company’s own analysis indicates an internal rating is more appropriate. Securities that are not rated by a rating agency are evaluated and classified by the Company on a case-by-case basis.
A summary of the Company’s non-investment grade fixed maturity securities that were in an unrealized loss position at June 30, 2021 is presented in the table below:
($ in thousands) Number of
Securities 		Aggregate
Fair Value 		Gross Unrealized Loss
Foreign government 27 $ 108,910 $ 30,171
Corporate 10 36,482 2,058
Mortgage-backed 4 276 19
Asset-backed 1 113 1
Total 42 $ 145,781 $ 32,249
As of June 30, 2021, the Company has recorded an allowance for expected credit losses on fixed maturity securities of $19 million. The Company has evaluated the remaining fixed maturity securities in an unrealized loss position and believes the unrealized losses are due primarily to temporary market and sector-related factors rather than to issuer-specific factors. None of these securities are delinquent or in default under financial covenants. Based on its assessment of these issuers, the Company expects them to continue to meet their contractual payment obligations as they become due.
Loans Receivable – For loans receivable, the Company estimates an allowance for expected credit losses based on relevant information about past events, including historical loss experience, current conditions and forecasts that affect the expected collectability of the amortized cost of the financial asset. The allowance for expected credit losses is presented as a reduction to amortized cost of the financial asset in the consolidated balance sheet and changes to the estimate for expected credit losses are recognized through net investment gains (losses). Loans receivable are reported net of an allowance for expected credit losses of $2 million and $5 million as of June 30, 2021 and December 31, 2020, respectively.
Fair Value Measurements . The Company’s fixed maturity available for sale securities, equity securities, and its arbitrage trading account securities are carried at fair value. Fair value is defined as “the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.” The Company utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for similar assets in active markets. Level 3 inputs are unobservable inputs for the asset or liability. Unobservable inputs may only be used to measure fair value to the extent that observable inputs are not available. The fair
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value of the vast majority of the Company’s portfolio is based on observable data (other than quoted prices) and, accordingly, is classified as Level 2.
In classifying particular financial securities in the fair value hierarchy, the Company uses its judgment to determine whether the market for a security is active and whether significant pricing inputs are observable. The Company determines the existence of an active market by assessing whether transactions occur with sufficient frequency and volume to provide reliable pricing information. The Company determines whether inputs are observable based on the use of such information by pricing services and external investment managers, the uninterrupted availability of such inputs, the need to make significant adjustments to such inputs and the volatility of such inputs over time. If the market for a security is determined to be inactive or if significant inputs used to price a security are determined to be unobservable, the security is categorized in Level 3 of the fair value hierarchy.
Because many fixed maturity securities do not trade on a daily basis, the Company utilizes pricing models and processes which may include benchmark curves, benchmarking of like securities, sector groupings and matrix pricing. Market inputs used to evaluate securities include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers and reference data. Quoted prices are often unavailable for recently issued securities that are infrequently traded or securities that are only traded in private transactions. For publicly traded securities for which quoted prices are unavailable, the Company determines fair value based on independent broker quotations and other observable market data. For securities traded only in private negotiations, the Company determines fair value based primarily on the cost of such securities, which is adjusted to reflect prices of recent placements of securities of the same issuer, financial data, projections and business developments of the issuer and other relevant information.
The following is a summary of pricing sources for the Company's fixed maturity securities available for sale as of June 30, 2021:
($ in thousands) Carrying
Value 		Percent
of Total
Pricing source:
Independent pricing services $ 15,340,983 98.5 %
Syndicate manager 52,962 0.3
Directly by the Company based on:
Observable data 185,982 1.2
Total $ 15,579,927 100.0 %
Independent pricing services – Substantially all of the Company’s fixed maturity securities available for sale were priced by independent pricing services (generally one U.S. pricing service plus additional pricing services with respect to a limited number of foreign securities held by the Company). The prices provided by the independent pricing services are generally based on observable market data in active markets (e.g., broker quotes and prices observed for comparable securities). The determination of whether markets are active or inactive is based upon the volume and level of activity for a particular asset class. The Company reviews the prices provided by pricing services for reasonableness based upon current trading levels for similar securities. If the prices appear unusual to the Company, they are re-examined and the value is either confirmed or revised. In addition, the Company periodically performs independent price tests of a sample of securities to ensure proper valuation and to verify our understanding of how securities are priced. As of June 30, 2021, the Company did not make any adjustments to the prices provided by the pricing services. Based upon the Company’s review of the methodologies used by the independent pricing services, these securities were classified as Level 2.
Syndicate manager – The Company has a 15% participation in a Lloyd’s syndicate, and the Company’s share of the securities owned by the syndicate is priced by the syndicate’s manager. The majority of the securities are liquid, short duration fixed maturity securities. The Company reviews the syndicate manager’s pricing methodology and audited financial statements and holds discussions with the syndicate manager as necessary to confirm its understanding and agreement with security prices. Based upon the Company’s review of the methodologies used by the syndicate manager, these securities were classified as Level 2.
Observable data – If independent pricing is not available, the Company prices the securities directly. Prices are based on observable market data where available, including current trading levels for similar securities and non-binding quotations from brokers. The Company generally requests two or more quotes. If more than one quote is received, the Company sets a price within the range of quotes received based on its assessment of the credibility of the quote and its own evaluation of the security. The Company generally does not adjust quotes obtained from brokers. Since these securities were priced based on observable data, they were classified as Level 2.
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Cash flow model – If the above methodologies are not available, the Company prices securities using a discounted cash flow model based upon assumptions as to prevailing credit spreads, interest rates and interest rate volatility, time to maturity and subordination levels. Discount rates are adjusted to reflect illiquidity where appropriate. These securities were classified as Level 3.


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Results of Operations for the Six Months Ended June 30, 2021 and 2020
Business Segment Results

Following is a summary of gross and net premiums written, net premiums earned, loss ratios (losses and loss expenses incurred expressed as a percentage of net premiums earned), expense ratios (underwriting expenses expressed as a percentage of net premiums earned) and GAAP combined ratios (sum of loss ratio and expense ratio) for each of our business segments for the six months ended June 30, 2021 and 2020. The GAAP combined ratio represents a measure of underwriting profitability, excluding investment income. A GAAP combined ratio in excess of 100 indicates an underwriting loss; a number below 100 indicates an underwriting profit.
($ in thousands) 2021 2020
Insurance:
Gross premiums written $ 4,561,859 $ 3,859,511
Net premiums written 3,734,036 3,126,475
Net premiums earned 3,332,181 2,949,999
Loss ratio 61.3 % 66.1 %
Expense ratio 28.9 % 31.0 %
GAAP combined ratio 90.2 % 97.1 %
Reinsurance & Monoline Excess:
Gross premiums written $ 584,089 $ 504,107
Net premiums written 528,183 459,189
Net premiums earned 489,399 418,334
Loss ratio 57.4 % 70.3 %
Expense ratio 30.6 % 32.6 %
GAAP combined ratio 88.0 % 102.9 %
Consolidated:
Gross premiums written $ 5,145,948 $ 4,363,618
Net premiums written 4,262,219 3,585,664
Net premiums earned 3,821,580 3,368,333
Loss ratio 60.8 % 66.6 %
Expense ratio 29.1 % 31.2 %
GAAP combined ratio 89.9 % 97.8 %
Net Income to Common Stockholders . The following table presents the Company’s net income to common stockholders and net income per diluted share for the six months ended June 30, 2021 and 2020:
(In thousands, except per share data) 2021 2020
Net income to common stockholders $ 466,763 $ 66,842
Weighted average diluted shares 186,985 190,078
Net income per diluted share $ 2.50 $ 0.35
The Company reported net income to common stockholders of $467 million in 2021 compared to $67 million in 2020. The $400 million increase in net income was primarily due to an after-tax increase in underwriting income of $244 million mainly due to the growth in premium rates and exposure as well as reductions in loss ratio partly due to lower catastrophe losses and in expense ratio driven by net earned premium growth outpacing expense growth, an after-tax increase in net investment gains of $125 million (primarily resulting from the sale of certain real estate assets, change in market value on equity securities and the gain from disposition of an asset in an investment fund), an after-tax increase in net investment income of $52 million primarily due to investment funds, a reduction of $10 million in tax expense due to a change in the effective tax rate, an after-tax increase in profits from non-insurance businesses of $4 million and an after-tax increase in profit from insurance service businesses of $2 million, partially offset by an after-tax decrease in foreign currency gains of $17 million, an after-tax increase in corporate expenses of $18 million which includes an after-tax debt extinguishment expense of $9 million on debt redeemed in 2021 and increased incentive compensation costs, an after-tax decrease in other income of $1 million and an after-tax increase in minority interest expense of $1 million. The number of weighted average diluted shares decreased by approximately three million for 2021 compared to 2020 mainly reflecting shares repurchased in 2020 and 2021.

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Premiums . Gross premiums written were $5,146 million in 2021, an increase of 18% from $4,364 million in 2020. The increase was due to a $702 million increase in the Insurance segment and a $80 million increase in the Reinsurance & Monoline Excess segment. Approximately 81% of premiums expiring in 2021 were renewed, and 79% of premiums expiring in 2020 were renewed.
Average renewal premium rates for insurance and facultative reinsurance increased 9.8% in 2021 when adjusted for changes in exposures, and increased 11.2% excluding workers' compensation.
A summary of gross premiums written in 2021 compared with 2020 by line of business within each business segment follows:
• Insurance - gross premiums increased 18% to $4,562 million in 2021 from $3,860 million in 2020. Gross premiums increased $248 million (18%) for other liability, $234 million (43%) for professional liability, $119 million (27%) for commercial auto and $101 million (11%) for short-tail lines.
• Reinsurance & Monoline Excess - gross premiums increased 16% to $584 million in 2021 from $504 million in 2020. Gross premiums increased $57 million (20%) for casualty reinsurance, $21 million (19%) for monoline excess and $2 million (2%) for property reinsurance.
Net premiums written were $4,262 million in 2021, an increase of 19% from $3,586 million in 2020. Ceded reinsurance premiums as a percentage of gross written premiums were 17% in 2021 and 18% in 2020.
Premiums earned increased 13% to $3,822 million in 2021 from $3,368 million in 2020. Insurance premiums (including the impact of rate changes) are generally earned evenly over the policy term, and accordingly, recent rate increases will be earned over the upcoming quarters. Premiums earned in 2021 are related to business written during both 2021 and 2020. Audit premiums were $84 million in 2021 compared with $83 million in 2020.
Net Investment Income . Following is a summary of net investment income for the six months ended June 30, 2021 and 2020:
Amount Average Annualized
Yield
($ in thousands) 2021 2020 2021 2020
Fixed maturity securities, including cash and cash equivalents and loans receivable $ 191,673 $ 233,861 2.2 % 3.1 %
Investment funds 100,246 (16,975) 14.8 (2.8)
Arbitrage trading account 22,989 32,442 8.4 11.6
Equity securities 13,392 4,288 4.9 2.4
Real estate 2,032 11,141 0.2 1.1
Gross investment income 330,332 264,757 3.1 2.7
Investment expenses (3,568) (4,563) — —
Total $ 326,764 $ 260,194 3.0 % 2.7 %
Net investment income increased 26% to $327 million in 2021 from $260 million in 2020 due primarily to a $117 million increase in income from investment funds primarily from financial services and energy funds, a $9 million increase from equity securities and a $1 million decrease in investment expense, partially offset by a $42 million decrease in income from fixed maturity securities mainly driven by lower investment yields, a $9 million decrease from the arbitrage trading account and a $9 million decrease in real estate. The Company shortened the duration of its fixed maturity security portfolio, thereby reducing the potential impact of mark-to-market on the portfolio and positioning the Company to react quickly to changes in the current interest rate environment. Average invested assets, at cost (including cash and cash equivalents), were $21.6 billion in 2021 and $19.5 billion in 2020.
Insurance Service Fees . The Company earns fees from an insurance distribution business, a third-party administrator and as a servicing carrier of workers' compensation assigned risk plans for certain states. Insurance service fees increased to $48 million in 2021 from $46 million in 2020, mainly due to the business recovery from the pandemic.
Net Realized and Unrealized Gains (Losses) on Investments . The Company buys and sells securities and other investment assets on a regular basis in order to maximize its total return on investments. Decisions to sell securities and other investment assets are based on management’s view of the underlying fundamentals of specific investments as well as management’s expectations regarding interest rates, credit spreads, currency values and general economic conditions. Net
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realized and unrealized gains on investments were $72 million in 2021 compared with net losses of $82 million in 2020. The gains of $72 million in 2021 reflect net realized gains on investments of $115 million (primarily due to the sale of certain real estate assets and the disposition of an investment fund) partially offset by an increase in unrealized losses on equity securities of $43 million. In 2020, the net losses of $82 million reflected net realized gains on investment sales of $11 million and an increase in unrealized losses on equity securities of $93 million, which was primarily due to market disruptions as a result of COVID-19.
Change in Allowance for Expected Credit Losses on Investments . Based on credit factors, the allowance for expected credit losses is increased or decreased depending on the percentage of unrealized loss relative to amortized cost by security, changes in rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. For the six months ended June 30, 2021, the pre-tax change in allowance for expected credit losses on investments increased by $13 million ($10 million after-tax), which is reflected in net investment gains (losses), primarily related to foreign government securities which did not previously have an allowance. For the six months ended June 30, 2020, the pre-tax change in allowance for expected credit losses on investments increased by $18 million ($14 million after-tax), which is reflected in net investment gains (losses) primarily related to market disruptions as a result of COVID-19.
Revenues from Non-Insurance Businesses . Revenues from non-insurance businesses were derived from businesses engaged in the distribution of promotional merchandise, world-wide textile solutions and aviation-related businesses that provide services to aviation markets, including (i) the distribution, manufacturing, repair and overhaul of aircraft parts and components, (ii) the sale of new and used aircraft, and (iii) avionics, fuel, maintenance, storage and charter services. Revenues from non-insurance businesses were $197 million in 2021 and $169 million in 2020. The increase mainly relates to the business recovery from COVID-19 on aviation-related and textile businesses.
Losses and Loss Expenses . Losses and loss expenses increased to $2,325 million in 2021 from $2,242 million in 2020. The consolidated loss ratio was 60.8% in 2021 and 66.6% in 2020. Catastrophe losses, net of reinsurance recoveries, were $80 million (including current accident year losses of approximately $40 million related to COVID-19) in 2021 and $225 million (including losses of approximately $143 million related to COVID-19) in 2020. Favorable prior year reserve development (net of premium offsets) was $4 million in 2021 and $7 million in 2020. The loss ratio excluding catastrophe losses and prior year reserve development was 58.8% in 2021 and 60.1% in 2020.
A summary of loss ratios in 2021 compared with 2020 by business segment follows:
• Insurance - The loss ratio was 61.3% in 2021 and 66.1% in 2020. Catastrophe losses were $70 million in 2021 compared with $171 million in 2020. The Company reflected a best estimate (net of reinsurance) based upon available information for current accident year COVID-19-related losses of approximately $38 million, primarily related to contingency and event cancellation coverage. Favorable prior year reserve development was $12 million in both 2021 and 2020. The loss ratio excluding catastrophe losses and prior year reserve development decreased 0.9 points to 59.7% in 2021 from 60.6% in 2020.
• Reinsurance & Monoline Excess - The loss ratio was 57.4% in 2021 and 70.3% in 2020. Catastrophe losses were $10 million in 2021 compared with $54 million in 2020. The Company reflected a best estimate (net of reinsurance) based upon available information for current accident year COVID-19-related losses of approximately $2 million, primarily related to excess workers’ compensation and short-tail lines. Adverse prior year reserve development was $8 million in 2021 and $5 in 2020. The loss ratio excluding catastrophe losses and prior year reserve development decreased 2.7 points to 53.5% in 2021 from 56.2% in 2020.
Other Operating Costs and Expenses . Following is a summary of other operating costs and expenses:
($ in thousands) 2021 2020
Policy acquisition and insurance operating expenses $ 1,111,483 $ 1,051,158
Insurance service expenses 42,575 42,995
Net foreign currency gains (6,719) (28,923)
Debt extinguishment costs 11,520 —
Other costs and expenses 105,114 93,943
Total $ 1,263,973 $ 1,159,173
Policy acquisition and insurance operating expenses are comprised of commissions paid to agents and brokers, premium taxes and other assessments and internal underwriting costs. Policy acquisition and insurance operating expenses increased 6% and net premiums earned increased 13% from 2020. The expense ratio (underwriting expenses expressed as a percentage of net premiums earned) was 29.1% in 2021 and 31.2% in 2020. The improvement is primarily attributable to higher
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net premiums earned outpacing compensation expense growth and lower travel and entertainment expenses due to the global pandemic. However, to the extent our net premiums earned decrease or travel and entertainment expenses increase, due to the impact of the COVID-19 pandemic or otherwise, our expense ratio would be expected to increase.
Service expenses, which represent the costs associated with the fee-based businesses, were $43 million in both 2021 and 2020.
Net foreign currency gains result from transactions denominated in a currency other than a company's operating functional currency. Net foreign currency gains were $7 million in 2021 compared to $29 million in 2020. The reduction in gains is primarily related to less weakening of the Argentine Peso compared to the USD in 2021 versus 2020 and strengthening of the GBP compared to the USD in 2021 versus weakening in 2020.
Debt extinguishment costs of $12 million related to the redemption of $400 million of subordinated debentures in March and June 2021 that were due in 2056.
Other costs and expenses represent general and administrative expenses of the parent company and other expenses not allocated to business segments, including the cost of certain long-term incentive plans and new business ventures. Other costs and expenses increased to $105 million in 2021 from $94 million in 2020, primarily due to the increase in non-recurring performance-based compensation costs in 2021.
Expenses from Non-Insurance Businesses . Expenses from non-insurance businesses represent costs associated with businesses engaged in the distribution of promotional merchandise, world-wide textile solutions and aviation-related businesses that include (i) cost of goods sold related to aircraft and products sold and services provided, and (ii) general and administrative expenses. Expenses from non-insurance businesses were $193 million in 2021 compared to $171 million in 2020. The increase mainly relates to the business recovery from COVID-19 on aviation-related and textile businesses.
Interest Expense . Interest expense was $75 million in both 2021 and 2020. In May 2020, the Company issued $300 million aggregate principal amount of 4.00% senior notes due 2050. In September 2020, the Company issued an additional $170 million aggregate principal amount of 4.00% senior notes due 2050 and $250 million aggregate principal amount of 4.25% subordinated debentures due 2060 and repaid $300 million aggregate principal amount of 5.375% senior notes at maturity. In October 2020, the Company redeemed $350 million aggregate principal amount of 5.625% subordinated debentures due 2053. In February 2021, the Company issued $300 million aggregate principal amount of 4.125% subordinated debenture due 2061. In March 2021, the Company issued $400 million aggregate principal amount of 3.55% senior notes due 2052 and redeemed its $110 million aggregate principal amount of 5.90% subordinated debentures due 2056. On June 1, 2021, the Company redeemed the $290 million aggregate principal amount of its 5.75% subordinated debentures due 2056. These redemptions resulted in debt extinguishment costs of $12 million during six months ended June 30, 2021. Additionally in second quarter of 2021, the Company sold a real estate asset which resulted in a $102 million reduction of the Company's debt that was supporting the property.
The redemption of debentures and issuance of additional debentures in 2021, as described below in "Liquidity and Capital Resources -- Debt," are expected to decrease interest expense in 2021 and forward.
Income Taxes. The effective income tax rate was 21.2% in 2021 and 31.2% in 2020. For the six months ended June 30, 2021, the effective income tax rate differs from the federal income tax rate of 21% principally because of state and foreign income taxes, which was partially offset by tax-exempt investment income and tax benefits related to equity-based compensation. The increased effective income tax rate for the six months ended June 30, 2020 was principally because foreign jurisdictions were limited on the utilization of losses at different tax rates.
The Company has not provided U.S. deferred income taxes on the undistributed earnings of approximately $119 million of its non-U.S. subsidiaries since these earnings are intended to be permanently reinvested in the non-U.S. subsidiaries. In the future, if such earnings were distributed the Company projects that the incremental tax, if any, will be immaterial.






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Results of Operations for the Three Months Ended June 30, 2021 and 2020
Business Segment Results

Following is a summary of gross and net premiums written, net premiums earned, loss ratios (losses and loss expenses incurred expressed as a percentage of net premiums earned), expense ratios (underwriting expenses expressed as a percentage of net premiums earned) and GAAP combined ratios (sum of loss ratio and expense ratio) for each of our business segments for the three months ended June 30, 2021 and 2020. The GAAP combined ratio represents a measure of underwriting profitability, excluding investment income. A GAAP combined ratio in excess of 100 indicates an underwriting loss; a number below 100 indicates an underwriting profit.
($ in thousands) 2021 2020
Insurance:
Gross premiums written $ 2,421,846 $ 1,917,702
Net premiums written 1,994,212 1,543,157
Net premiums earned 1,727,202 1,465,044
Loss ratio 61.4 % 67.0 %
Expense ratio 28.5 % 30.7 %
GAAP combined ratio 89.9 % 97.7 %
Reinsurance & Monoline Excess:
Gross premiums written $ 239,390 $ 214,544
Net premiums written 217,969 196,661
Net premiums earned 244,422 211,871
Loss ratio 58.2 % 72.2 %
Expense ratio 30.4 % 32.9 %
GAAP combined ratio 88.6 % 105.1 %
Consolidated:
Gross premiums written $ 2,661,236 $ 2,132,246
Net premiums written 2,212,181 1,739,818
Net premiums earned 1,971,624 1,676,915
Loss ratio 61.0 % 67.7 %
Expense ratio 28.7 % 31.0 %
GAAP combined ratio 89.7 % 98.7 %
Net Income to Common Stockholders . The following table presents the Company’s net income to common stockholders and net income per diluted share for the three months ended June 30, 2021 and 2020:
(In thousands, except per share data) 2021 2020
Net income to common stockholders $ 237,238 $ 71,260
Weighted average diluted shares 187,106 187,862
Net income per diluted share $ 1.27 $ 0.38
The Company reported net income to common stockholders of $237 million in 2021 compared to $71 million in 2020. The $166 million increase in net income was primarily due to an after-tax increase in underwriting income of $142 million mainly due to the growth in premium rates and exposure as well as reductions in loss ratio partly due to lower catastrophe losses and in expense ratio driven by net earned premium growth outpacing expense growth, an after-tax increase in net investment income of $66 million primarily due to investment funds, a reduction of $12 million in tax expense due to a change in the effective tax rate, an after-tax increase in profits from non-insurance businesses of $2 million, an after-tax increase in profit from insurance service businesses of $1 million and a less than $1 million after-tax increase in other income, partially offset by an after-tax reduction in net investment gains of $42 million primarily due to change in market value on equity securities partially offset by the sale of a real estate asset, an after-tax increase in corporate expenses of $10 million which includes an after-tax debt extinguishment expense of $6 million on debt redeemed in the second quarter of 2021 and an after-tax decrease in foreign currency gains of $5 million. The number of weighted average diluted shares decreased by less than one million for 2021 compared to 2020 mainly reflecting shares repurchased in 2020 and 2021.

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Premiums . Gross premiums written were $2,661 million in 2021, an increase of 25% from $2,132 million in 2020. The increase was due to a $504 million increase in the Insurance segment and a $25 million increase in the Reinsurance & Monoline Excess segment. Approximately 81% of premiums expiring in 2021 were renewed, and 78% of premiums expiring in 2020 were renewed.
Average renewal premium rates for insurance and facultative reinsurance increased 8.5% in 2021 when adjusted for changes in exposures, and increased 9.7% excluding workers' compensation.
A summary of gross premiums written in 2021 compared with 2020 by line of business within each business segment follows:
• Insurance - gross premiums increased 26% to $2,422 million in 2021 from $1,918 million in 2020. Gross premiums increased $166 million (25%) for other liability, $142 million (50%) for professional liability, $76 million (34%) for commercial auto, $76 million (16%) for short-tail lines and $44 million (16%) for workers' compensation lines.
• Reinsurance & Monoline Excess - gross premiums increased 12% to $239 million in 2021 from $215 million in 2020. Gross premiums increased $24 million (17%) for casualty reinsurance and $5 million (25%) for monoline excess, partially offset by a $5 million (9%) reduction for property reinsurance.
Net premiums written were $2,212 million in 2021, an increase of 27% from $1,740 million in 2020. Ceded reinsurance premiums as a percentage of gross written premiums were 17% in 2021 and 18% in 2020.
Premiums earned increased 18% to $1,972 million in 2021 from $1,677 million in 2020. Insurance premiums (including the impact of rate changes) are generally earned evenly over the policy term, and accordingly, recent rate increases will be earned over the upcoming quarters. Premiums earned in 2021 are related to business written during both 2021 and 2020. Audit premiums were $52 million in 2021 compared with $41 million in 2020.
Net Investment Income . Following is a summary of net investment income for the three months ended June 30, 2021 and 2020:
Amount Average Annualized
Yield
($ in thousands) 2021 2020 2021 2020
Fixed maturity securities, including cash and cash equivalents and loans receivable $ 96,996 $ 105,843 2.2 % 2.7 %
Investment funds 61,311 (57,552) 17.9 (19.4)
Arbitrage trading account 3,914 31,304 2.5 20.6
Equity securities 7,212 2,726 5.2 3.1
Real estate 872 5,045 0.2 1.0
Gross investment income 170,305 87,366 3.2 1.8
Investment expenses (2,118) (1,935) — —
Total $ 168,187 $ 85,431 3.1 % 1.7 %
Net investment income increased 97% to $168 million in 2021 from $85 million in 2020 due primarily to a $119 million increase in income from investment funds primarily from financial services and energy funds and a $4 million increase from equity securities, partially offset by a $27 million decrease from the arbitrage trading account, a $9 million decrease in income from fixed maturity securities mainly driven by lower investment yields and a $4 million decrease in real estate. The Company shortened the duration of its fixed maturity security portfolio, thereby reducing the potential impact of mark-to-market on the portfolio and positioning the Company to react quickly to changes in the current interest rate environment. Average invested assets, at cost (including cash and cash equivalents), were $21.9 billion in 2021 and $19.6 billion in 2020.
Insurance Service Fees . The Company earns fees from an insurance distribution business, a third-party administrator and as a servicing carrier of workers' compensation assigned risk plans for certain states. Insurance service fees were $22 million in 2021 and $20 million in 2020, an increase mainly due to the business recovery from the pandemic.
Net Realized and Unrealized Gains (Losses) on Investments . The Company buys and sells securities and other investment assets on a regular basis in order to maximize its total return on investments. Decisions to sell securities and other investment assets are based on management’s view of the underlying fundamentals of specific investments as well as management’s expectations regarding interest rates, credit spreads, currency values and general economic conditions. Net realized and unrealized gains on investments were $20 million in 2021 compared with net gains of $62 million in 2020. The
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gains of $20 million in 2021 reflect net realized gains on investments of $39 million (primarily due to the sale of certain real estate assets) partially offset by an increase in unrealized losses on equity securities of $19 million. In 2020, the gains of $62 million reflected net realized losses on investment sales of $261 thousand and an increase in unrealized gains on equity securities of $62 million.
Change in Allowance for Expected Credit Losses on Investments. Based on credit factors, the allowance for expected credit losses is increased or decreased depending on the percentage of unrealized loss relative to amortized cost by security, changes in rating of the security by a rating agency, and adverse conditions specifically related to the security, among other factors. For the three months ended June 30, 2021, the pre-tax change in allowance for expected credit losses on investments decreased by $4 million ($3 million after-tax), which is reflected in net investment gains (losses), primarily related to the disposition of loans which were previously impaired. For the three months ended June 30, 2020, the pre-tax change in allowance for expected credit losses on investments decreased by $16 million ($13 million after-tax), which is reflected in net investment gains (losses), primarily related to market disruptions as a result of COVID-19.
Revenues from Non-Insurance Businesses . Revenues from non-insurance businesses were derived from businesses engaged in the distribution of promotional merchandise, world-wide textile solutions and aviation-related businesses that provide services to aviation markets, including (i) the distribution, manufacturing, repair and overhaul of aircraft parts and components, (ii) the sale of new and used aircraft, and (iii) avionics, fuel, maintenance, storage and charter services. Revenues from non-insurance businesses were $109 million in 2021 and $76 million in 2020. The increase mainly relates to the business recovery from COVID-19 on aviation-related and textile businesses.
Losses and Loss Expenses . Losses and loss expenses increased to $1,203 million in 2021 from $1,135 million in 2020. The consolidated loss ratio was 61.0% in 2021 and 67.7% in 2020. Catastrophe losses, net of reinsurance recoveries, were $44 million (including current accident year losses of approximately $25 million related to COVID-19) in 2021 and $146 million (including losses of approximately $86 million related to COVID-19) in 2020. Favorable prior year reserve development (net of premium offsets) was $400 thousand in 2021 and $3 million in 2020. The loss ratio excluding catastrophe losses and prior year reserve development was 58.8% in 2021 and 59.2% in 2020.
A summary of loss ratios in 2021 compared with 2020 by business segment follows:
• Insurance - The loss ratio was 61.4% in 2021 and 67.0% in 2020. Catastrophe losses were $37 million in 2021 compared with $114 million in 2020. The Company reflected a best estimate (net of reinsurance) based upon available information for current accident year COVID-19-related losses of approximately $23 million, primarily related to contingency and event cancellation coverage. Favorable prior year reserve development was $6 million in 2021 and $5 million in 2020. The loss ratio excluding catastrophe losses and prior year reserve development increased 0.3 points to 59.8% in 2021 from 59.5% in 2020, primarily due to higher than average non-weather related property losses.
• Reinsurance & Monoline Excess - The loss ratio was 58.2% in 2021 and 72.2% in 2020. Catastrophe losses were $7 million in 2021 compared with $32 million in 2020. The Company reflected a best estimate (net of reinsurance) based upon available information for current accident year COVID-19-related losses of approximately $2 million, primarily related to excess workers’ compensation and short-tail lines. Adverse prior year reserve development was $6 million in 2021 and $2 million in 2020. The loss ratio excluding catastrophe losses and prior year reserve development decreased 3.5 points to 52.9% in 2021 from 56.4% in 2020.
Other Operating Costs and Expenses. Following is a summary of other operating costs and expenses:
($ in thousands) 2021 2020
Policy acquisition and insurance operating expenses $ 565,733 $ 519,234
Insurance service expenses 21,789 20,423
Net foreign currency losses (1,125) (7,382)
Debt extinguishment costs 7,903 —
Other costs and expenses 53,405 48,565
Total $ 647,705 $ 580,840
Policy acquisition and insurance operating expenses are comprised of commissions paid to agents and brokers, premium taxes and other assessments and internal underwriting costs. Policy acquisition and insurance operating expenses increased 9% and net premiums earned increased 18% from 2020. The expense ratio (underwriting expenses expressed as a percentage of premiums earned) was 28.7% in 2021 and 31.0% in 2020. The improvement is primarily attributable to higher net premiums earned outpacing compensation expense growth. However, to the extent our net premiums earned decrease or travel
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and entertainment expenses increase, due to the impact of the COVID-19 pandemic or otherwise, our expense ratio would be expected to increase.
Service expenses, which represent the costs associated with the fee-based businesses, were $22 million in 2021 and $20 million in 2020.
Net foreign currency gains result from transactions denominated in a currency other than a company's operating functional currency. Net foreign currency gains were $1 million in 2021 compared to $7 million in 2020.
Debt extinguishment costs of $8 million in 2021 related to the redemption of a $290 million subordinated debenture in June 2021 that was due in 2056.
Other costs and expenses represent general and administrative expenses of the parent company and other expenses not allocated to business segments, including the cost of certain long-term incentive plans and new business ventures. Other costs and expenses increased to $53 million in 2021 from $49 million in 2020, primarily due to the increase in non-recurring performance-based compensation costs in 2021.
Expenses from Non-Insurance Businesses . Expenses from non-insurance businesses represent costs associated with businesses engaged in the distribution of promotional merchandise, world-wide textile solutions and aviation-related businesses that include (i) cost of goods sold related to aircraft and products sold and services provided, and (ii) general and administrative expenses. Expenses from non-insurance businesses were $107 million in 2021 compared to $76 million in 2020. The increase mainly relates to the business recovery from COVID-19 on aviation-related and textile businesses.
Interest Expense . Interest expense was $38 million in both 2021 and 2020. In May 2020, the Company issued $300 million aggregate principal amount of 4.00% senior notes due 2050. In September 2020, the Company issued an additional $170 million aggregate principal amount of 4.00% senior notes due 2050 and $250 million aggregate principal amount of 4.25% subordinated debentures due 2060 and repaid $300 million aggregate principal amount of 5.375% senior notes at maturity. In October 2020, the Company redeemed $350 million aggregate principal amount of 5.625% subordinated debentures due 2053. In February 2021, the Company issued $300 million aggregate principal amount of 4.125% subordinated debenture due 2061. In March 2021, the Company issued $400 million aggregate principal amount of 3.55% senior notes due 2052 and redeemed its $110 million aggregate principal amount of 5.90% subordinated debentures due 2056. On June 1, 2021, the Company redeemed the $290 million aggregate principal amount of its 5.75% subordinated debentures due 2056. These redemptions resulted in debt extinguishment costs of $12 million in 2021, including $8 million in the second quarter of 2021. Additionally in second quarter of 2021, the Company sold a real estate asset which resulted in a $102 million reduction of the Company's debt that was supporting the property.
The redemption of debentures and issuance of additional debentures in 2021, as described below in "Liquidity and Capital Resources -- Debt," are expected to decrease interest expense in 2021 and forward.
Income Taxes. The effective income tax rate was 20.8% in 2021 and 32.0% in 2020. The effective income tax rate
differs from the federal income tax rate of 21% principally because of state and foreign income taxes, which was partially offset by tax-exempt investment income and tax benefits related to equity-based compensation. The increased effective income tax rate for the three months ended June 30, 2021 was principally because foreign jurisdictions were limited on the utilization of losses at different tax rates.
The Company has not provided U.S. deferred income taxes on the undistributed earnings of approximately $119 million of its non-U.S. subsidiaries since these earnings are intended to be permanently reinvested in the non-U.S. subsidiaries. In the future, if such earnings were distributed the Company projects that the incremental tax, if any, will be immaterial.


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Investments
As part of its investment strategy, the Company establishes a level of cash and highly liquid short-term and intermediate-term securities that, combined with expected cash flow, it believes is adequate to meet its payment obligations. Due to the low fixed maturity investment returns, the Company invests in equity securities, merger arbitrage securities, investment funds, private equity, loans and real estate related assets. The Company's investments in investment funds and its other alternative investments have experienced, and the Company expects to continue to experience, greater fluctuations in investment income.
The Company also attempts to maintain an appropriate relationship between the average duration of the investment portfolio and the approximate duration of its liabilities (i.e., policy claims and debt obligations). The average duration of the fixed maturity portfolio, including cash and cash equivalents, was 2.4 years at both June 30, 2021 and December 31, 2020. The Company’s fixed maturity investment portfolio and investment-related assets as of June 30, 2021 were as follows:
($ in thousands) Carrying
Value 		Percent
of Total
Fixed maturity securities:
U.S. government and government agencies $ 502,625 2.3 %
State and municipal:
Special revenue 2,176,388 9.8
Local general obligation 452,710 2.0
State general obligation 451,588 2.0
Pre-refunded (1) 248,137 1.1
Corporate backed 165,190 0.8
Total state and municipal 3,494,013 15.7
Mortgage-backed:
Agency 661,323 3.0
Commercial 143,586 0.6
Residential-Prime 117,488 0.5
Residential-Alt A 7,029 —
Total mortgage-backed 929,426 4.1
Asset-backed 4,317,863 19.4
Corporate:
Industrial 3,106,003 13.9
Financial 1,633,318 7.3
Utilities 423,848 1.9
Other 177,494 0.8
Total corporate 5,340,663 23.9
Foreign government and foreign government agencies 1,068,918 4.8
Total fixed maturity securities 15,653,508 70.2
Equity securities:
Common stocks 449,500 2.0
Preferred stocks 193,493 0.9
Total equity securities 642,993 2.9
Cash and cash equivalents (2) 2,088,319 9.4
Real estate 1,811,263 8.1
Investment funds 1,368,661 6.1
Arbitrage trading account 634,276 2.8
Loans receivable 116,009 0.5
Total investments $ 22,315,029 100.0 %
____________________
(1) Pre-refunded securities are securities for which an escrow account has been established to fund the remaining payments of principal and interest through maturity. Such escrow accounts are funded almost exclusively with U.S. Treasury and U.S. government agency securities.
(2) Cash and cash equivalents includes trading accounts receivable from brokers and clearing organizations, trading account securities sold but not yet purchased and unsettled purchases.


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Fixed Maturity Securities . The Company’s investment policy with respect to fixed maturity securities is generally to purchase instruments with the expectation of holding them to their maturity. However, management of the available for sale portfolio is considered necessary to maintain an approximate matching of assets and liabilities as well as to adjust the portfolio as a result of changes in financial market conditions and tax considerations.
The Company’s philosophy related to holding or selling fixed maturity securities is based on its objective of maximizing total return. The key factors that management considers in its investment decisions as to whether to hold or sell fixed maturity securities are its view of the underlying fundamentals of specific securities as well as its expectations regarding interest rates, credit spreads and currency values. In a period in which management expects interest rates to rise, the Company may sell longer duration securities in order to mitigate the impact of an interest rate rise on the fair value of the portfolio. Similarly, in a period in which management expects credit spreads to widen, the Company may sell lower quality securities, and in a period in which management expects certain foreign currencies to decline in value, the Company may sell securities denominated in those foreign currencies. The sale of fixed maturity securities in order to achieve the objective of maximizing total return may result in realized gains; however, there is no reason to expect these gains to continue in future periods.
Equity Securities . Equity securities primarily represent investments in common and preferred stocks in companies with potential growth opportunities in different sectors, mainly in the financial institutions and energy sectors.
Investment Funds . At June 30, 2021, the carrying value of investment funds was $1,369 million, including investments in financial services funds of $452 million, transportation funds of $271 million, real estate funds of $263 million, other funds of $234 million and energy funds of $149 million. Investment funds are generally reported on a one-quarter lag.
Real Estate . Real estate is directly owned property held for investment. At June 30, 2021, real estate properties in operation included a long-term ground lease in Washington D.C., an office complex in New York City, an office building in London, and the completed portion of a mixed-use project in Washington D.C. In addition, part of the previously mentioned mixed-use project in Washington D.C. is under development. The Company expects to fund further development costs for the project with a combination of its own funds and external financing.
Arbitrage Trading Account . The arbitrage trading account is comprised of direct investments in arbitrage securities. Merger arbitrage is the business of investing in the securities of publicly held companies that are the targets in announced tender offers and mergers.
Loans Receivable . Loans receivable, which are carried at amortized cost (net of allowance for expected credit losses), had an amortized cost of $116 million and an aggregate fair value of $118 million at June 30, 2021. The amortized cost of loans receivable is net of an allowance for expected credit losses of $2 million as of June 30, 2021. Loans receivable include real estate loans of $90 million that are secured by commercial and residential real estate located primarily in New York. Real estate loans generally earn interest at fixed or stepped interest rates and have maturities through 2026. Loans receivable include commercial loans of $26 million that are secured by business assets and have fixed interest rates with varying maturities not exceeding 10 years.
Market Risk . The fair value of the Company’s investments is subject to risks of fluctuations in credit quality and interest rates. The Company uses various models and stress test scenarios to monitor and manage interest rate risk. The Company attempts to manage its interest rate risk by maintaining an appropriate relationship between the effective duration of the investment portfolio and the approximate duration of its liabilities (i.e., policy claims and debt obligations). The effective duration for the fixed maturity portfolio (including cash and cash equivalents) was 2.4 years at both June 30, 2021 and December 31, 2020.
In addition, the fair value of the Company’s international investments is subject to currency risk. The Company attempts to manage its currency risk by matching its foreign currency assets and liabilities where considered appropriate.

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Liquidity and Capital Resources
Cash Flow . Cash flow provided from operating activities increased to $696 million in the first six months of 2021 from $580 million in the first six months of 2020, primarily due to an increase in premium receipts, net of reinsurance and commissions settled, partially offset by an increase in tax payments.
The Company's insurance subsidiaries' principal sources of cash are premiums, investment income, service fees and proceeds from sales and maturities of portfolio investments. The principal uses of cash are payments for claims, taxes, operating expenses and dividends. The Company expects its insurance subsidiaries to fund the payment of losses with cash received from premiums, investment income and fees. The Company generally targets an average duration for its investment portfolio that is within 1.5 years of the average duration of its liabilities so that portions of its investment portfolio mature throughout the claim cycle and are available for the payment of claims if necessary. In the event operating cash flow and proceeds from maturities and prepayments of fixed income securities are not sufficient to fund claim payments and other cash requirements, the remainder of the Company's cash and investments is available to pay claims and other obligations as they become due. The Company's investment portfolio is highly liquid, with approximately 79% invested in cash, cash equivalents and marketable fixed maturity securities as of June 30, 2021. If the sale of fixed maturity securities were to become necessary, a realized gain or loss equal to the difference between the cost and sales price of securities sold would be recognized.
Debt . At June 30, 2021, the Company had senior notes, subordinated debentures and other debt outstanding with a carrying value of $2,919 million and a face amount of $2,937 million, including $300 million aggregate principal amount of its 4.125% subordinated debentures due 2061 issued in February 2021 as well as $400 million aggregate principal amount of its 3.55% senior notes due 2052 issued in March 2021. The Company redeemed its $110 million aggregate principal amount of 5.90% subordinated debentures due 2056 on March 1, 2021 and its $290 million aggregate principal amount of 5.75% subordinated debentures due 2056 on June 1, 2021. Additionally in the second quarter of 2021, the Company sold a real estate asset which resulted in a $102 million reduction of the Company's debt that was supporting the property. The maturities of the outstanding debt are $3 million in 2021, $426 million in 2022, $3 million in 2025, $250 million in 2037, $350 million in 2044, $470 million in 2050, $400 million in 2052, $185 million in 2058, $300 million in 2059, $250 million in 2060 and $300 million in 2061.
Equity . At June 30, 2021, total common stockholders’ equity was $6.6 billion, common shares outstanding were 177,413,970 and stockholders’ equity per outstanding share was $37.08. During the six months ended June 30, 2021, the Company repurchased 465,063 shares of its common stock for $30 million. In the second quarter of 2021, the Board declared a regular quarterly cash dividend of $0.13 per share and a special cash dividend of $0.50 per share. The number of common shares outstanding excludes shares held in a grantor trust established by the Company for delivery upon settlement of vested but mandatorily deferred RSUs.
Total Capital . Total capitalization (equity, debt and subordinated debentures) was $9.5 billion at June 30, 2021. The percentage of the Company’s capital attributable to senior notes, subordinated debentures and other debt was 31% at June 30, 2021 and 30% at December 31, 2020.

Item 3 . Quantitative and Qualitative Disclosure About Market Risk
Reference is made to the information under “Investments - Market Risk” under the caption “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Form 10-Q.

Item 4. Controls and Procedures
Disclosure Controls and Procedures. The Company’s management, including its Chief Executive Officer and Chief Financial Officer, has conducted an evaluation of the effectiveness of the Company’s disclosure controls and procedures pursuant to Securities Exchange Act Rule 13a-14 as of the end of the period covered by this quarterly report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the Company has in place effective controls and procedures designed to ensure that information required to be disclosed by the Company in the reports it files or submits under the Securities Exchange Act of 1934, as amended, and the rules thereunder, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.
Changes in Internal Control over Financial Reporting. During the quarter ended June 30, 2021, there were no changes in the Company’s internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

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PART II — OTHER INFORMATION
Item 1. Legal Proceedings
Please see Note 20 to the notes to the interim consolidated financial statements.

Item 1A. Risk Factors
There have been no material changes from the risk factors previously disclosed in the Company’s annual report on Form 10-K for the fiscal year ended December 31, 2020.


Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
The Company did not repurchase any of its shares during the three months ended June 30, 2021, and accordingly the number of shares authorized for purchase by the Company remains 6,269,659.


Item 6. Exhibits
Number
( 31.1 )
Certification of the Chief Executive Officer pursuant to Rule 13a-14(a)/ 15d-14(a).
( 31.2 )
Certification of the Chief Financial Officer pursuant to Rule 13a-14(a)/ 15d-14(a).
( 32.1 )
Certification of the Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.


W. R. BERKLEY CORPORATION



Date: August 2, 2021 /s/ W. Robert Berkley, Jr.
W. Robert Berkley, Jr.
President and Chief Executive Officer
Date: August 2, 2021 /s/ Richard M. Baio
Richard M. Baio
Executive Vice President - Chief Financial Officer
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