EC 20-F DEF-14A Report Dec. 31, 2011

ECOPETROL S.A.

20-Fs

20-F	Fiscal year ended Dec. 31, 2023
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20-F	Fiscal year ended Dec. 31, 2011
20-F	Fiscal year ended Dec. 31, 2010
20-F	Fiscal year ended Dec. 31, 2009

TABLE OF CONTENTS

Item 1. Identity Of Directors, Senior Management and Advisors 5 Item 2. Offer Statistics and Expected Timetable 5 Item 3. Key Information 5 Item 4. Information on The Company 21 Item 4A. Unresolved Staff Comments 64 Item 5. Operating and Financial Review and Prospects 64 Item 6. Directors, Senior Management and Employees 85 Item 7. Major Shareholders and Related Party Transactions 93 Item 8. Financial Information 97 Item 9. The Offer and Listing 99 Item 10. Additional Information 101 Item 11. Quantitative and Qualitative Disclosures About Market Risk 110 Item 12. Description Of Securities Other Than Equity Securities 112 Item 12A. Debt Securities 112 Item 12B. Warrants and Rights 112 Item 12C. Other Securities 112 Item 12D. American Depositary Shares 112 Item 13. Defaults, Dividend Arrearages and Delinquencies 113 Item 14. Material Modifications To The Rights Of Security Holders and Use Of Proceeds 113 Item 15. Controls and Procedures 114 Item 16. [reserved] 115 Item 16A. Audit Committee Financial Expert 115 Item 16B. Code Of Ethics 115 Item 16C. Principal Accountant Fees and Services 115 Item 16D. Exemptions From The Listing Standards For Audit Committees 116 Item 16E. Purchases Of Equity Securities By The Issuer and Affiliated Purchasers 116 Item 16F. Change in Registrant S Certifying Accountant 116 Item 16G. Corporate Governance 116 Item 16H. Mine Safety Disclosure 118 Item 17. Financial Statements 118 Item 18. Financial Statements 118 Item 19. Exhibits 119 Item 1. Identity Of Directors, Senior Management and Advisors Item 2. Offer Statistics and Expected Timetable Item 3. Key Information Item 4. Information on The Company Item 4A. Unresolved Staff Comments Item 5. Operating and Financial Review and Prospects Item 6. Directors, Senior Management and Employees Item 7. Major Shareholders and Related Party Transactions Item 8. Financial Information Item 9. The Offer and Listing Item 10. Additional Information Item 11. Quantitative and Qualitative Disclosures About Market Risk Item 12. Description Of Securities Other Than Equity Securities Item 12A. Debt Securities Item 12B. Warrants and Rights Item 12C. Other Securities Item 12D. American Depositary Shares Item 13. Defaults, Dividend Arrearages and Delinquencies Item 14. Material Modifications To The Rights Of Security Holders and Use Of Proceeds Item 15. Controls and Procedures Item 16. [reserved]Item 16A. Audit Committee Financial Expert Item 16B. Code Of Ethics Item 16C. Principal Accountant Fees and Services Item 16D. Exemptions From The Listing Standards For Audit Committees Item 16E. Purchases Of Equity Securities By The Issuer and Affiliated Purchasers Item 16F. Change in Registrant S Certifying Accountant Item 16G. Corporate Governance Item 16H. Mine Safety Disclosure Item 17. Financial Statements Item 18. Financial Statements Item 19. Exhibits Item 2011 2010 Item Number Of People

Customer name	Ticker
Apache Corporation	APA
VOXX International Corporation	VOXX
EOG Resources, Inc.	EOG
Ferro Corporation	FOE
Ferro Corporation	FOE
The Goodyear Tire & Rubber Company	GT
Martin Marietta Materials, Inc.	MLM
Mohawk Industries, Inc.	MHK
The New York Times Company	NYT
Newmont Corporation	NEM
Silgan Holdings Inc.	SLGN

EC 20-F Report ended Dec. 31, 2011