BANF 10-Q Quarter ended Sept. 30, 2011

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the quarterly period ended September 30, 2011

OR

For the transition period from              to

Commission File Number 0-14384

BancFirst Corporation

(Exact name of registrant as specified in charter)

(405) 270-1086

(Registrant’s telephone number, including area code)

N/A

(Former name, former address and former fiscal year, if changed since last report)

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 x No ¨ .

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (sec. 232-405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes x No ¨ .

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act).    Yes ¨ No x

As of October 31, 2011 there were 15,130,708 shares of the registrant’s Common Stock outstanding.

BANCFIRST CORPORATION

(Dollars in thousands, except per share data)

The accompanying Notes are an integral part of these consolidated financial statements.

2

BANCFIRST CORPORATION

(Unaudited)

(Dollars in thousands, except per share data)

The accompanying Notes are an integral part of these consolidated financial statements.

3

BANCFIRST CORPORATION

CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(Unaudited)

(Dollars in thousands, except per share data)

The accompanying Notes are an integral part of these consolidated financial statements.

4

BANCFIRST CORPORATION

(Unaudited)

(Dollars in thousands)

The accompanying Notes are an integral part of these consolidated financial statements.

5

BANCFIRST CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

The accompanying consolidated financial statements include the accounts of BancFirst Corporation, Council Oak Partners, LLC, BancFirst Insurance Services, Inc., The Okemah National Bank, 1st Bank Oklahoma and BancFirst and its subsidiaries (the “Company”). The operating subsidiaries of BancFirst are Council Oak Investment Corporation, Council Oak Real Estate, Inc., BancFirst Agency, Inc., Lenders Collection Corporation and BancFirst Community Development Corporation. All significant intercompany accounts and transactions have been eliminated. Assets held in a fiduciary or agency capacity are not assets of the Company and, accordingly, are not included in the consolidated financial statements.

The unaudited interim financial statements contained herein reflect all adjustments which are, in the opinion of management, necessary to provide a fair statement of the financial position and results of operations of the Company for the interim periods presented. All such adjustments are of a normal and recurring nature. There have been no significant changes in the accounting policies of the Company since December 31, 2010, the date of the most recent annual report.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States inherently involves the use of estimates and assumptions that affect the amounts reported in the financial statements and the related disclosures. These estimates relate principally to the determination of the allowance for loan losses, income taxes, the fair value of financial instruments and the valuation of intangibles. Such estimates and assumptions may change over time and actual amounts realized may differ from those reported. Certain items in prior financial statements have been reclassified to conform to the current presentation.

In July 2010, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2010-20 “Receivables (Topic 310)—Disclosures about the Credit Quality of Financing Receivables and the Allowance for Credit Losses,” which expands the disclosure requirements concerning the credit quality of an entity’s financing receivables and its allowance for loan losses. The new disclosures that relate to information as of the end of the reporting period were effective as of December 31, 2010, whereas the disclosures related to activity that occurred during the reporting periods were effective January 1, 2011. The adoption of this disclosure-only guidance did not have an effect on the Company’s financial statements. See Note (5) for disclosure.

In December 2010, the FASB issued ASU 2010-28 “Intangibles – Goodwill and Other (Topic 350)—When to Perform Step 2 of the Goodwill Impairment Test for Reporting Units with Zero or Negative Carrying Amounts.” The amendments in this update affect all entities that have recognized goodwill and have one or more reporting units whose carrying amount for purposes of performing Step 1 of the goodwill impairment test is zero or negative. For public entities, the amendments in this update were effective for fiscal years, and interim periods within those years, beginning after December 15, 2010. The Company does not have any reporting units with zero or negative carrying amounts, therefore the adoption of this update did not have an effect on the Company’s financial statements.

In April 2011, the FASB issued ASU No. 2011-02, “Receivables (Topic 310)—A Creditor’s Determination of Whether a Restructuring Is a Troubled Debt Restructuring.” ASU 2011-02 clarifies which loan modifications constitute troubled debt restructurings and is intended to assist creditors in determining whether a modification of the terms of a receivable meets the criteria to be considered a troubled debt restructuring, both for purposes of recording an impairment loss and for disclosure of troubled debt restructurings. In evaluating whether a restructuring constitutes a troubled debt restructuring, a creditor must separately conclude, under the guidance clarified by ASU 2011-02, that both of the following exist: (a) the restructuring constitutes a concession; and (b) the debtor is experiencing financial difficulties. ASU 2011-02 was effective for the Company on July 1, 2011, and applies retrospectively to restructurings occurring on or after January 1, 2011. Adoption of ASU 2011-02 did not have a significant effect on the Company’s financial statements.

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In May 2011, the FASB issued ASU No. 2011-04, “Fair Value Measurement (Topic 820)—Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. generally accepted accounting principles (“GAAP”) and International Financial Reporting Standards (“IFRS”).” ASU 2011-04 is an update to explain how to measure fair value. This amendment does not require additional fair value measurements and is not intended to establish valuation standards or affect valuation practices outside of financial reporting. This amendment was put forth in order to describe many of the requirements in GAAP for measuring fair value and for disclosing information about fair value measurements consistent with IFRS. ASU 2011-04 will be effective for the Company on December 16, 2011, and applies prospectively. Adoption of ASU 2011-04 is not expected to have a significant effect on the Company’s financial statements.

In June 2011, the FASB issued ASU No. 2011-05, “Comprehensive Income (Topic 220)—Presentation of Comprehensive Income.” ASU 2011-05 is an update to improve the comparability, consistency, and transparency of financial reporting, to increase the prominence of items reported in other comprehensive income, and to facilitate convergence of GAAP and IFRS. The Company adopted ASU 2011-05 as of September 30, 2011, and it applies retrospectively. The adoption of ASU 2011-05 did not have a significant effect on the Company’s financial statements.

In September 2011, the FASB issued ASU No. 2011-08, “Intangibles – Goodwill and Other (Topic 350).” ASU 2011-08 is an update to simplify how entities test for goodwill impairment. The amendments in the update permit the Company to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If these factors determined that the fair value exceeds the carrying amount then the Company is not required to calculate the fair value of the reporting unit. The Company adopted ASU 2011-08 as of September 30, 2011. Adoption of ASU 2011-08 did not have a significant effect on the Company’s financial statements.

On July 12, 2011, the Company completed the acquisition of FBC Financial Corporation and its subsidiary bank, 1st Bank Oklahoma with banking locations in Claremore, Tulsa, Verdigris, and Inola, Oklahoma. The Company paid a premium of $1.5 million above the equity capital of FBC Financial Corporation. At acquisition, 1st Bank Oklahoma had approximately $217 million in total assets, $116 million in loans, $178 million in deposits and $18 million in equity capital. The bank will operate under its present name until it is merged into BancFirst, which is expected to be on February 17, 2012. The acquisition did not have a material effect on the Company’s consolidated financial statements.

On December 15, 2010, the Company completed the acquisition of OK Bancorporation, Inc., and its subsidiary bank, The Okemah National Bank. At acquisition, The Okemah National Bank had approximately $73 million in total assets, $32 million in loans, $62 million in deposits, and $9 million in equity capital. The bank operated as The Okemah National Bank until it was merged into BancFirst on October 21, 2011. The acquisition did not have a material effect on the Company’s consolidated financial statements.

On December 10, 2010, the Company completed the acquisition of Exchange Bancshares of Moore, Inc., and its subsidiary bank, Exchange National Bank of Moore. At acquisition, Exchange National Bank of Moore had approximately $147 million in total assets, $47 million in loans, $116 million in deposits, and $10 million in equity capital. Exchange National Bank of Moore operated as a subsidiary of BancFirst Corporation until it was merged into BancFirst on June 17, 2011. The acquisition did not have a material effect on the Company’s consolidated financial statements.

On October 8, 2010, the Company completed the acquisition of Union National Bancshares, Inc., and its subsidiary bank, Union Bank of Chandler with offices in Chandler and Tulsa, Oklahoma. At acquisition, Union Bank of Chandler had approximately $134 million in total assets, $90 million in loans, $117 million in deposits, and $15 million in equity capital. Union Bank of Chandler operated as a subsidiary of BancFirst Corporation until it was merged into BancFirst on November 12, 2010. The acquisition did not have a material effect on the Company’s consolidated financial statements.

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The Company recorded a total of $13.3 million of goodwill and core deposit intangibles as a result of the three acquisitions completed in 2010. The combined acquisitions added approximately $354 million in total assets, $169 million in loans and $295 million in deposits. The effects of these acquisitions were included in the consolidated financial statements of the Company from the date of acquisition forward. The Company does not believe these acquisitions, individually or in aggregate were material to the Company’s consolidated financial statements.

The Federal Reserve enacted a final rule on June 29, 2011 establishing the debit card interchange rate at $0.21 per transaction and five basis points multiplied by the value of the transaction that was effective on October 1, 2011 for banks exceeding $10 billion in assets.

Effective June 30, 2010, the Company ceased participation in the Transaction Account Guarantee Program (“TAGP”) for extended coverage of noninterest-bearing transaction deposit accounts. Accordingly, the standard insurance amount was in effect for the Company’s deposit accounts through December 31, 2010. In November 2010, the FDIC issued a final rule to implement provisions of the Dodd-Frank Act that provide for temporary unlimited coverage for noninterest-bearing transaction accounts. The separate coverage for noninterest-bearing transaction accounts became effective on December 31, 2010 and terminates on December 31, 2012.

On April 1, 2010, the Company’s insurance agency BancFirst Insurance Services, Inc., also operating as Wilcox & McGrath, Inc., completed its acquisition of RBC Agency, Inc., which has offices in Shawnee and Stillwater. BancFirst Insurance Services, Inc. has offices in Oklahoma City, Tulsa, Lawton and Muskogee. The acquisition did not have a material effect on the Company’s consolidated financial statements.

On March 21, 2010, Congress passed student loan reform legislation centralizing student lending in a governmental agency, which as of June 30, 2010 resulted in an end to the student loan programs provided by the Company. As of September 30, 2011, the Company had no student loans held for sale and had approximately $48.4 million of student loans held for investment.

The following table summarizes securities held for investment and securities available for sale:

The following table summarizes the amortized cost and estimated market values of securities held for investment:

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The following table summarizes the amortized cost and estimated market values of securities available for sale:

The maturities of securities held for investment and available for sale are summarized in the following table using contractual maturities. Actual maturities may differ from contractual maturities due to obligations that are called or prepaid. For purposes of the maturity table, mortgage-backed securities, which are not due at a single maturity date, have been presented at their contractual maturity.