UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2013 -------------- Check here if Amendment [_]; Amendment Number: -------------- This Amendment (Check only one.): [_]is a restatement. [_]adds new holdings entries. Institutional Investment Manager filing this Report: Name: Astenbeck Capital Management LLC ---------------------------------------------------- 500 Nyala Farm Road ---------------------------------------------------- Westport, Connecticut 06880 ---------------------------------------------------- Form 13F File Number: 028-14243 -------------------------- The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Jill Arnold ------------------------------------------------ Title: Vice President, General Counsel and Secretary ------------------------------------------------ Phone: 203-221-6180 ------------------------------------------------ Signature, Place, and Date of Signing: /s/ Jill Arnold Westport, Connecticut May 14, 2013 --------------- --------------------- ------------ [Signature] [City, State] [Date] [X] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [_] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [_] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) List of Other Managers Reporting for this Manager: None FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 2 --------------------------- Form 13F Information Table Entry Total: 22 --------------------------- Form 13F Information Table Value Total: $567,422 --------------------------- (x thousand) List of Other Included Managers: 1. Astenbeck Holdings LLC 2. AJH Capital LLC ------------------------------------------------------------------------------------------------------------------------------------ COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8 ------------------------------------------------------------------------------------------------------------------------------------ VALUE SHRS OR PUT/ INVESTMENT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x $1000) PRN AMT SH/PRN CALL DISCRETION MANAGER SOLE SHARED NONE ------------------------------------------------------------------------------------------------------------------------------------ ANADARKO PETE CORP COM 032511 10 7 38,891 444,717 SH Defined 1, 2 444,717 ------------------------------------------------------------------------------------------------------------------------------------ BP PLC SPONSORED ADR 055622 10 4 26,368 622,632 SH Defined 1, 2 622,632 ------------------------------------------------------------------------------------------------------------------------------------ CAMERON INTERNATIONAL CORP COM 13342B 10 5 26,344 404,046 SH Defined 1, 2 404,046 ------------------------------------------------------------------------------------------------------------------------------------ CANADIAN NAT RES LTD COM 136385 10 1 14,980 466,241 SH Defined 1, 2 466,241 ------------------------------------------------------------------------------------------------------------------------------------ CHEVRON CORP NEW COM 166764 10 0 34,219 287,988 SH Defined 1, 2 287,988 ------------------------------------------------------------------------------------------------------------------------------------ CME GROUP INC COM 12572Q 10 5 1,842 30,000 SH Defined 1, 2 30,000 ------------------------------------------------------------------------------------------------------------------------------------ CONOCOPHILLIPS COM 20825C 10 4 33,309 554,221 SH Defined 1, 2 554,221 ------------------------------------------------------------------------------------------------------------------------------------ CONTINENTAL RESOURCES INC COM 212015 10 1 21,200 243,877 SH Defined 1, 2 243,877 ------------------------------------------------------------------------------------------------------------------------------------ CORE LABORATORIES N V COM N22717 10 7 14,823 107,477 SH Defined 1, 2 107,477 ------------------------------------------------------------------------------------------------------------------------------------ ENSCO PLC SHS CLASS A G3157S 10 6 5,372 89,539 SH Defined 1, 2 89,539 ------------------------------------------------------------------------------------------------------------------------------------ EOG RES INC COM 26875P 10 1 38,364 299,557 SH Defined 1, 2 299,557 ------------------------------------------------------------------------------------------------------------------------------------ EXXON MOBIL CORP COM 30231G 10 2 13,514 149,976 SH Defined 1, 2 149,976 ------------------------------------------------------------------------------------------------------------------------------------ FREEPORT-MCMORAN COPPER & GO COM 35671D 85 7 33,712 1,018,495 SH Defined 1, 2 1,018,495 ------------------------------------------------------------------------------------------------------------------------------------ HALLIBURTON CO COM 406216 10 1 11,352 280,926 SH Defined 1, 2 280,926 ------------------------------------------------------------------------------------------------------------------------------------ NATIONAL OILWELL VARCO INC COM 637071 10 1 36,318 513,333 SH Defined 1, 2 513,333 ------------------------------------------------------------------------------------------------------------------------------------ RANGE RES CORP COM 75281A 10 9 34,902 430,681 SH Defined 1, 2 430,681 ------------------------------------------------------------------------------------------------------------------------------------ ROYAL DUTCH SHELL PLC SPONS ADR A 780259 20 6 28,727 440,870 SH Defined 1, 2 440,870 ------------------------------------------------------------------------------------------------------------------------------------ SCHLUMBERGER LTD COM 806857 10 8 16,693 222,899 SH Defined 1, 2 222,899 ------------------------------------------------------------------------------------------------------------------------------------ SOUTHWESTERN ENERGY CO COM 845467 10 9 20,124 540,100 SH Defined 1, 2 540,100 ------------------------------------------------------------------------------------------------------------------------------------ STATOIL ASA SPONSORED ADR 85771P 10 2 55,800 2,266,451 SH Defined 1, 2 2,266,451 ------------------------------------------------------------------------------------------------------------------------------------ SUNCOR ENERGY INC NEW COM 867224 10 7 12,162 405,253 SH Defined 1, 2 405,253 ------------------------------------------------------------------------------------------------------------------------------------ TOTAL S A SPONSORED ADR 89151E 10 9 48,406 1,008,873 SH Defined 1, 2 1,008,873 ------------------------------------------------------------------------------------------------------------------------------------