8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15 (d) OF

THE SECURITIES EXCHANGE ACT OF 1934

DATE OF EARLIEST EVENT REPORTED: February 20, 2013

ATP OIL & GAS CORPORATION

(Exact name of registrant as specified in its charter)

Commission file number: 001-32647

Texas	76-0362774
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

4600 Post Oak Place, Suite 100

Houston, Texas 77027

(Address of principal executive offices)

(Zip Code)

(713) 622-3311

(Registrant’s telephone number, including area code)

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 7.01. Regulation FD Disclosure.

As previously disclosed, on August 17, 2012, ATP Oil & Gas Corporation (the “Company”) filed a voluntary petition for relief (the “Bankruptcy Filing”) under Chapter 11 of Title 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Southern District of Texas (the “Bankruptcy Court”) Case No. 12-36187.

On February 20, 2013, the Company filed with the Bankruptcy Court its monthly operating report for January 2013 (the “January Monthly Operating Report”). Also on February 20, 2013, the Company filed with the Bankruptcy Court an amended monthly operating report for December 2012 (the “Amended December Monthly Operating Report” and together with the January Monthly Operating Report, the “Monthly Operating Reports”). A copy of the January Monthly Operating Report is furnished as Exhibit 99.1 to this Current Report on Form 8-K, and a copy of the Amended December Monthly Operating Report is furnished as Exhibit 99.2 to this Current Report on Form 8-K.

Limitation on Incorporation by Reference

In accordance with General Instruction B.2 of Form 8-K, the information in this Item 7.01 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing.

Cautionary Statement Regarding Financial and Operating Data

The Company cautions investors and potential investors not to place undue reliance upon the information contained in the Monthly Operating Reports, which were not prepared for the purpose of providing the basis for an investment decision relating to any of the securities of the Company. The Monthly Operating Reports are limited in scope, cover a limited time period, and have been prepared solely for the purpose of complying with the monthly reporting requirements of the Bankruptcy Court. The Monthly Operating Reports were not audited or reviewed by independent accountants, are in a format prescribed by applicable bankruptcy laws, and are subject to future adjustment and reconciliation. There can be no assurance that, from the perspective of an investor or potential investor in the Company’s securities, the Monthly Operating Reports are complete. The Monthly Operating Reports also contain information for periods that are shorter or otherwise different from those required in the Company’s reports pursuant to the Exchange Act, and such information might not be indicative of the Company’s financial condition or operating results for the period that would be reflected in the Company’s financial statements or in its reports pursuant to the Exchange Act. Results set forth in the Monthly Operating Reports should not be viewed as indicative of future results.

Cautionary Statement Regarding Forward-Looking Statements

Certain statements in this Current Report on Form 8-K are forward-looking as defined in the Private Securities Litigation Reform Act of 1995. These statements involve certain risks and uncertainties that may be beyond our control and may cause our actual future results to differ materially from our current expectations both in connection with the Chapter 11 case and the Company’s business and financial prospects. Statements of management’s expectations, including its desire to successfully restructure in order to position the Company for long term viability and success, to address its financial challenges, to address important issues in an orderly way and to make the Company stronger and more competitive are based on current assumptions and expectations. No assurance can be made that these events will come to fruition. We do not undertake to update our forward-looking statements. Factors that could affect our results include, but are not limited to: (i) the ability of the Company to continue as a going concern, (ii) the ability of the Company to obtain Bankruptcy Court approval with respect to motions in the Chapter 11 case, (iii) the ability of the Company to prosecute, develop and consummate one or more plans of reorganization with respect to the Chapter 11 case, (iv) the effects of the Bankruptcy Filing on the Company and the interests of various creditors, equity holders and other constituents, (v) Bankruptcy Court rulings in the Chapter 11 case and the outcome of the cases in general, (vi) the length of time the Company will operate under the Chapter 11 cases, (vii) risks associated with third-party motions in the Chapter 11 case, which may interfere with the ability of the Company to develop one or more plans of reorganization and consummate such plans once they are developed, (viii) the potential adverse effects of the Chapter 11 proceedings on the Company’s liquidity or results of operations, (ix) the ability to execute the Company’s business and restructuring plans, (x) increased legal costs related to the Company’s Bankruptcy Filing and other litigation, and (xi) the ability of the Company to maintain contracts that are critical to its operation, including to obtain and maintain normal terms with their vendors, customers, landlords and service providers and to retain key executives, managers and employees. In the event that the risks disclosed

in the Company’s public filings and those discussed above cause results to differ materially from those expressed in the Company’s forward-looking statements, the Company’s business, financial condition, results of operations or liquidity, and the interests of creditors, equity holders and other constituents, could be materially adversely affected. The Company undertakes no obligation (and expressly disclaims any such obligation) to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. For additional information concerning factors that could cause actual results to materially differ from those projected herein, please refer to the Company’s reports on Form 10-K and Form 10-Q.

Additional information regarding the Bankruptcy Filings is available on the internet at www.atpog.com. Filings with the Bankruptcy Court and claims information are available at www.kccllc.net/atpog.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

The following exhibits are filed in accordance with the provisions of Item 601 of Regulation S-K:

Exhibit	Exhibit Description
99.1	January Monthly Operating Report
99.2	Amended December Monthly Operating Report

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 and thereunto duly authorized.

	ATP Oil & Gas Corporation
Date: February 26, 2013	By:	/s/ Albert L. Reese Jr.
		Albert L. Reese Jr. Chief Financial Officer

Exhibit Index

Exhibit	Exhibit Description
99.1	January Monthly Operating Report
99.2	Amended December Monthly Operating Report

EX-99.1

Exhibit 99.1

Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 1 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 COMPARATIVE BALANCE SHEETS ASSETS FILING DATE MONTH MONTH MONTH MONTH MONTH MONTH 8/17/2012 8/31/2012 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 CURRENT ASSETS Cash $ 6,119,734 $ 47,144,872 $ 54,512,686 $ 39,600,277 $ 21,768,168 $ 27,461,947 $ 31,017,288 Restricted Cash 4,840,908 14,841,112 82,549,173 39,780,233 32,834,527 6,761,481 4,842,120 Accounts Receivable, Net 48,962,845 48,202,892 51,860,095 49,641,379 43,065,163 44,230,795 42,127,058 Accounts Receivable, Related Party———762,714 762,714 Accounts Receivable, Affiliates 699,367,083 705,099,121 710,056,471 715,813,853 721,441,532 728,001,311 733,427,809 Prepaid Expenses and Other Current Assets 18,938,661 19,533,602 14,207,138 11,902,075 15,435,513 13,558,411 11,371,647 TOTAL CURRENT ASSETS 778,229,231 834,821,599 913,185,563 856,737,817 834,544,903 820,776,659 823,548,636 Oil & Gas Properties 2,914,007,759 2,939,625,568 2,988,835,104 2,962,670,018 2,958,065,891 2,974,039,661 2,990,718,996 Less Accumulated DD&A and Impairment 1,622,583,195 1,636,941,332 1,650,846,528 1,664,818,884 1,685,343,773 1,702,319,023 1,715,599,235 OIL & GAS PROPERTIES, NET 1,291,424,564 1,302,684,236 1,337,988,576 1,297,851,134 1,272,722,118 1,271,720,638 1,275,119,761 OTHER ASSETS 1. Deferred Tax Assets————2. Investments in Affiliates 892,154,554 888,614,697 869,098,552 864,632,911 860,285,519 854,658,147 851,317,990 3. Deferred Financing Costs—net 2,075,258 2,171,506 1,970,434 1,836,314 1,756,502 1,690,150 1,630,373 4. Furniture & Fixtures, net 482,093 463,201 440,959 418,736 396,666 374,663 354,364 5. Other Non-current Receivable 12,269,065 12,273,726 12,278,238 12,282,902 12,287,418 12,292,086 12,296,755 6. Non-current Restricted Cash———10,828,192 21,511,292 TOTAL ASSETS $ 2,976,634,765 $ 3,041,028,965 $ 3,134,962,322 $ 3,033,759,814 $ 2,981,993,126 $ 2,972,340,535 $ 2,985,779,171 MOR-2 Revised 07/01/98 Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 2 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 COMPARATIVE BALANCE SHEETS LIABILITIES & OWNERS’ FILING DATE MONTH MONTH MONTH MONTH MONTH MONTH EQUITY 8/17/2012 8/31/2012 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 LIABILITIES POST-PETITION LIABILITIES(MOR-4) $—$ 501,051,920 $ 631,908,259 $ 559,111,503 $ 573,175,745 $ 606,981,811 $ 650,659,808 PRE-PETITION LIABILITIES Secured obligations 2,014,806,960 1,650,999,715 1,648,605,960 1,651,917,233 1,666,895,379 1,666,667,861 1,669,859,237 Priority unsecured obligations 11,287,816 11,287,816 10,759,598 10,759,598 10,759,598 10,759,598 10,759,598 Unsecured obligations 251,241,600 251,241,600 198,576,609 191,241,071 153,633,566 154,530,858 145,344,702 Other pre-petition obligations————TOTAL CLAIMABLE PRE-PETITION LIABILITIES 2,277,336,376 1,913,529,131 1,857,942,167 1,853,917,902 1,831,288,543 1,831,958,317 1,825,963,537 Asset Retirement Obligation (1) 149,468,228 150,114,665 149,970,805 151,553,115 150,540,263 150,639,591 151,600,166 Derivative Liability 1,962,381———Other obligations (2) 544,832,478 510,150,491 536,415,044 520,685,753 504,590,990 486,816,091 475,335,236 TOTAL LIABILITIES 2,973,599,463 3,074,846,207 3,176,236,275 3,085,268,273 3,059,595,541 3,076,395,810 3,103,558,747 OWNERS’ EQUITY (DEFICIT) PREFERRED STOCK 277,406,044 277,406,044 277,406,044 136,457,044 136,457,044 136,457,044 136,457,044 COMMON STOCK 52,660 52,660 52,660 73,288 73,288 73,288 73,288 TREASURY STOCK (911,729) (911,729) (911,729) (911,729) (911,729) (911,729) (911,729) ADDITIONAL PAID-IN CAPITAL 536,339,243 536,976,475 537,384,047 678,615,495 678,990,045 678,096,005 678,392,363 8/1-8/17 TRANSLATION ADJUSTMENT (3) 1,363,677———RETAINED EARNINGS: Filing Date (811,214,593) (811,214,593) (811,214,593) (811,214,593) (811,214,593) (811,214,593) (811,214,593) RETAINED EARNINGS: Post Filing Date—(32,699,588) (37,323,566) (43,748,848) (65,899,091) (85,830,539) (96,514,352) Equity in earnings of ATPIP and ATP Titan: Post Filing Date—(3,426,511) (6,666,816) (10,779,116) (15,097,379) (20,724,751) (24,061,597) TOTAL OWNERS’ EQUITY (DEFICIT) 3,035,302 (33,817,242) (41,273,953) (51,508,459) (77,602,415) (104,055,275) (117,779,576) TOTAL LIABILITIES & OWNERS’ EQUITY $ 2,976,634,765 $ 3,041,028,965 $ 3,134,962,322 $ 3,033,759,814 $ 2,981,993,126 $ 2,972,340,535 $ 2,985,779,171 MOR-3 Revised 07/01/98 (1) (2) (3) ARO represents GAAP present value estimate of future cash flows. ARO is subject to certain potential bonding requirements, some of which have not been determined as of the date of this filing. Other obligations include term NPI and ORRI interests which are accounted for as obligations under GAAP because they are granted on proved properties where production is reasonably assured. Amounts associated with these other obligations are not payable until production occurs. Our August 17 through August 31, 2012 income was estimated using an allocation of 15/31 days for certain line items. Our balance sheet line items represent the August 17 balances when possible; otherwise amounts presented represent July 31 balances. Because of this, an equity translation adjustment is required. Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 3 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 SCHEDULE OF POST-PETITION LIABILITIES MONTH MONTH MONTH MONTH MONTH MONTH 8/31/2012 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 TRADE ACCOUNTS PAYABLE (MOR-5) $ 11,682,314 $ 9,262,572 $ 4,618,385 $ 14,180,863 $ 15,322,843 $ 11,996,568 ACCOUNTS PAYABLE—AFFILIATES—5,762,204 5,766,203 5,764,704 2,357,704 2,346,253 TAX PAYABLE Federal Payroll Taxes———State Payroll Taxes———Ad Valorem Taxes———Other Taxes———TOTAL TAXES PAYABLE———SECURED DEBT POST-PETITION 414,344,609 524,877,029 525,532,714 528,769,960 560,562,828 598,571,531 ACCRUED INTEREST PAYABLE 583,204 4,625,503 4,852,269 5,000,980 3,332,769 5,045,322 ACCRUED PROFESSIONAL FEES* 746,512 440,553 715,540—2,338,073—OTHER ACCRUED LIABILITIES 1. Payroll accruals———2. Other accruals 55,145,058 77,503,779 10,701,453 12,937,793 17,103,704 27,310,623 3. Other payables 18,550,223 9,436,619 6,924,939 6,521,445 5,963,890 5,389,511 TOTAL POST-PETITION LIABILITIES (MOR-3) $ 501,051,920 $ 631,908,259 $ 559,111,503 $ 573,175,745 $ 606,981,811 $ 650,659,808 *Payment requires Court Approval MOR-4 Revised 07/01/98 Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 4 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 AGING OF POST-PETITION LIABILITIES MONTH 1/31/2013 DAYS TOTAL TRADE FEDERAL STATE AD VALOREM, ACCOUNTS (1) TAXES TAXES OTHER TAXES 0-30 $ 11,542,277 $ 11,542,277 $—$—$—31-60 512,435 512,435——61-90 (15,448) (15,448)——91+ (42,696) (42,696)——TOTAL $ 11,996,568 $ 11,996,568 $—$—$—AGING OF ACCOUNTS RECEIVABLE DAYS TOTAL Revenue Joint Interest (2) Other 0-30 DAYS $ 34,319,409 $ 32,026,011 $ 2,139,745 $ 153,653 31-60 DAYS 903,370—903,370—61-90 DAYS 355,367—355,367—91+ DAYS 6,259,589—6,067,166 192,423 TOTAL $ 41,837,735 $ 32,026,011 $ 9,465,648 $ 346,076 MOR-5 Revised 07/01/98 (1) 31-60 day balance comprised of invoices which were paid in February 2013. (2) 91+ day balance includes $2,013,375 of amounts being withheld over WI% dispute and $415,789 of amounts regarding Black Elk/Nippon lawsuit Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 5 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 STATEMENT OF INCOME (LOSS) MONTH MONTH MONTH MONTH MONTH MONTH FILING TO 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 DATE REVENUES (MOR-1) $ 17,962,067 $ 37,184,014 $ 36,306,806 $ 31,765,591 $ 32,224,068 $ 30,171,748 $ 185,614,294 GROSS PROFIT 17,962,067 37,184,014 36,306,806 31,765,591 32,224,068 30,171,748 185,614,294 OPERATING EXPENSES: Lease Operating Expenses 3,596,446 7,405,660 7,072,186 8,386,269 8,814,772 6,504,280 41,779,613 Processing fees, related party 3,456,290 6,590,000 6,643,000 6,590,000 6,643,000 6,643,000 36,565,290 Depreciation, depletion and amortization 6,958,244 13,927,439 13,994,578 20,546,958 15,875,072 13,300,510 84,602,801 Impairment of oil and gas properties—— 1,122,182—1,122,182 Accretion 508,076 1,059,370 1,032,207 1,000,518 1,009,476 960,222 5,569,869 Abandonment(Gain)/Loss 32,108 130,910—(4,564)—158,454 Compensation Expense 778,853 1,165,292 1,359,794 1,265,270 821,145 993,692 6,384,046 Professional Fees 882,462 (35,889) 967,109 341,154 1,156,098 117,935 3,428,869 Other General & Administrative 131,419 76,284 224,881 (50,919) (23,259) 469,993 828,399 TOTAL OPERATING EXPENSES 16,343,898 30,319,066 31,293,755 38,079,250 35,413,922 28,989,632 180,439,523 INCOME (LOSS) FROM OPERATIONS (MOR-1) 1,618,169 6,864,948 5,013,051 (6,313,659) (3,189,854) 1,182,116 5,174,771 INTEREST INCOME 2,033,953 4,504,888 4,860,557 4,818,186 5,135,175 5,401,059 26,753,818 INTEREST (EXPENSE), NET (2,191,113) (13,303,416) (15,464,387) (16,457,399) (15,503,937) (15,824,520) (78,744,772) DERIVATIVES GAIN/(LOSS)—(30,879) (972) 4,387 (49,716) (80,324) (157,504) DEBT EXTINGUISHMENT GAIN/(LOSS) (6,937,100)———(6,937,100) TOTAL INT, DER.& OTHER ITEMS (7,094,260) (8,829,407) (10,604,802) (11,634,826) (10,418,478) (10,503,785) (59,085,558) NET INCOME (LOSS) BEFORE REORGANIZATION EXPENSES (5,476,091) (1,964,459) (5,591,751) (17,948,485) (13,608,332) (9,321,669) (53,910,787) REORGANIZATION (EXPENSES): US Trustee fees (30,000)—(30,000)—(30,000) (90,000) Professional fees (1,037,305) (2,659,519) (803,531) (4,201,758) (6,323,116) (1,332,144) (16,357,373) Debt valuation adjustments————Claims adjustments (26,156,192)———(26,156,192) Interest income————REORGANIZATION EXPENSES, NET: (27,223,497) (2,659,519) (833,531) (4,201,758) (6,323,116) (1,362,144) (42,603,565) NET INCOME (LOSS) (MOR-1) $ (32,699,588) $ (4,623,978) $ (6,425,282) $ (22,150,243) $ (19,931,448) $ (10,683,813) $ (96,514,352) Accrual Accounting Required, Otherwise Footnote with Explanation. MOR-6 Revised 07/01/98 Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 6 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 CASH RECEIPTS AND MONTH MONTH MONTH MONTH MONTH MONTH FILING TO DISBURSEMENTS 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 DATE 1. CASH-BEGINNING OF MONTH $ 6,119,734 $ 47,144,872 $ 54,512,686 $ 39,600,277 $ 21,768,168 $ 27,461,947 $ 6,119,734 RECEIPTS: 1. COLLECTION OF NET REVENUE ACCOUNTS RECEIVABLE 21,003,439 34,319,343 29,583,979 31,906,235 30,003,561 27,380,551 174,197,108 2. COLLECTION OF JOINT INTEREST ACCOUNTS RECEIVABLE—681,206 383,486 75,705 422,632 370,126 1,933,155 3. OTHER OPERATING RECEIPTS (MOR-7B)—310,803 115,223 653,805 96,689 116,279 1,292,799 4. FINANCING RECEIPTS (MOR-7B) 406,338,823 40,091,939 42,508,352 6,946,412 54,258,956 36,219,712 586,364,194 TOTAL RECEIPTS** 427,342,262 75,403,291 72,591,040 39,582,157 84,781,838 64,086,668 763,787,256 (Withdrawal) Contribution by Individual Debtor MFR-2* DISBURSEMENTS: 5. TERM-LIMITED ORRI 940,089 2,991,609 1,766,390 3,838,613 3,112,889 3,577,064 16,226,654 6. TERM-LIMITED NPI—12,645,837 21,087,710 16,535,724 18,117,033 13,883,293 82,269,597 7. DERIVATIVE SETTLEMENTS PAID (RECEIVED) 2,141,118 30,879 90,352 (4,387) 49,716 80,324 2,388,002 8. LEASE OPERATING COSTS—1,702,508 10,662,317 3,560,882 8,849,102 11,790,128 36,564,937 9. GOMEZ PIPELINE OBLIGATION 830,833 877,160 1,026,951 898,828—922,920 4,556,692 10. TITAN FEE 5,500,000 10,000,000 5,000,000 5,000,000 10,000,000 5,000,000 40,500,000 11. ATPIP FEES 1,571,182 1,571,682 1,518,682 1,571,682 (71,318) 1,532,633 7,694,543 12. GENERAL & ADMINISTRATIVE (MOR-7B) 437,500 2,264,864 2,129,975 1,650,573 3,681,736 1,576,444 11,741,092 13. OTHER OPERATING DISBURSEMENTS (MOR-7B)————TOTAL DISBURSEMENTS FROM OPERATIONS 11,420,722 32,084,539 43,282,377 33,051,915 43,739,158 38,362,806 201,941,517 14. CAPEX CASH DISBURSMENTS (MOR-7B)—34,933,676 38,100,489 14,214,751 24,455,908 17,350,856 129,055,680 15. BANKRUPTCY & PROFESSIONAL FEES (MOR-9A) 620,479 572,818 1,311,798 5,432,032 4,019,279 1,353,443 13,309,849 16. FINANCING PAYMENTS—PRINCIPAL AND INTEREST (MOR-7B) 374,275,923 444,444 4,808,785 4,715,568 6,873,714 3,464,222 394,582,656 TOTAL DISBURSEMENTS** 386,317,124 68,035,477 87,503,449 57,414,266 79,088,059 60,531,327 738,889,702 17. NET CASH FLOW 41,025,138 7,367,814 (14,912,409) (17,832,109) 5,693,779 3,555,341 24,897,554 18. CASH—END OF MONTH (MOR-2) $ 47,144,872 $ 54,512,686 $ 39,600,277 $ 21,768,168 $ 27,461,947 $ 31,017,288 $ 31,017,288 * Applies to Individual debtors only MOR-7A **Numbers for the current month should balance (match) Revised 07/01/98 RECEIPTS and CHECKS/OTHER DISBURSEMENTS lines on MOR-8 Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 7 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 CASH RECEIPTS AND MONTH MONTH MONTH MONTH MONTH MONTH FILING TO DISBURSEMENTS DETAIL 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 DATE OTHER OPERATING RECEIPTS (Line 3) Miscellaneous $—$ 310,803 $ 115,223 $ 653,805 $ 96,689 $ 116,279 $ 1,292,799 GENERAL & ADMINISTRATIVE (Line 12) Compensation 352,523 1,235,511 1,008,815 907,731 2,723,959 662,086 6,890,625 Rent—55,812 110,518—3,419 1,987 171,736 Office and general costs—89,235 82,965 11,151 13,253 23,878 220,482 Travel related—26,191 20,791 10,447 12,346 2,198 71,973 D&O 82,413 81,233 97,420 20,502 20,000—301,568 Other costs 2,564 776,882 809,466 700,742 908,759 886,295 4,084,708 GENERAL & ADMINISTRATIVE TOTAL 437,500 2,264,864 2,129,975 1,650,573 3,681,736 1,576,444 11,741,092 OTHER OPERATING DISBURSEMENTS (Line 13)————CAPEX CASH DISBURSMENTS (Line 14) Maintenance/Other—27,985—346,243 484,645 858,873 Clipper project—34,933,676 37,895,335 13,391,177 10,981,074 5,770,884 102,972,146 Gomez #9 project————Plugging and abandonment of oil and gas properties—177,169 823,574 13,128,591 11,095,327 25,224,661 CAPEX CASH DISBURSMENTS TOTAL—34,933,676 38,100,489 14,214,751 24,455,908 17,350,856 129,055,680 FINANCING PAYMENTS—PRINCIPAL AND INTEREST (Line 16) 1st lien principal and interest 367,338,823———367,338,823 New facility principal and interest 6,937,100 444,444 4,808,785 4,715,568 6,873,714 3,464,222 27,243,833 FINANCING PAYMENTS—PRINCIPAL AND INTEREST TOTAL 374,275,923 444,444 4,808,785 4,715,568 6,873,714 3,464,222 394,582,656 FINANCING RECEIPTS (Line 4) New facility proceeds $ 406,338,823 $ 40,091,939 $ 42,508,352 $ 6,946,412 $ 54,258,956 $ 36,219,712 $ 586,364,194 MOR-7B Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 8 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 CASH ACCOUNT RECONCILIATION MONTH OF 1/31/2013 BANK NAME JPMorgan Chase JPMorgan Chase JPMorgan Chase JPMorgan Chase JPMorgan Chase Green Bank ACCOUNT NUMBER 113334321 1000027441 6300050955 58902066488 113400841 3300247239 ACCOUNT TYPE Operating Deposit Controlled Disbursement Cafeteria Plan Other Payroll TOTAL BANK BALANCE $ 35,803,460 $—$—$ 12,103 $—$ 413,052 $ 36,228,615 DEPOSITS IN TRANSIT—2,298——2,298 OUTSTANDING CHECKS—5,213,625——5,213,625 ADJUSTED BANK BALANCE $ 35,803,460 $—$ (5,211,327) $ 12,103 $—$ 413,052 $ 31,017,288 BEGINNING CASH—PER BOOKS $ 29,562,451 $—$ (2,449,742) $ 24,100 $—$ 325,138 $ 27,461,947 RECEIPTS* 64,078,578—8,090—64,086,668 TRANSFERS BETWEEN ACCOUNTS (13,370,172)—12,620,172—750,000—(WITHDRAWAL) OR INDIVIDUAL CONTRIBUTION BY DEBTOR MFR-2————CHECKS/OTHER DISBURSEMENTS* 44,467,397—15,381,757 20,087—662,086 60,531,327 ENDING CASH—PER BOOKS $ 35,803,460 $—$ (5,211,327) $ 12,103 $—$ 413,052 $ 31,017,288 MOR-8 *Numbers should balance (match) TOTAL RECEIPTS and Revised 07/01/98 TOTAL DISBURSEMENTS lines on MOR-7A Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 9 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 PAYMENTS TO INSIDERS AND PROFESSIONALS Of the total disbursements shown for the month, list the amount paid to insiders (as defined in Section 101(31)(A)-(F) of the U.S. Bankruptcy Code) and the professionals. Also, for insiders, identify the type of compensation paid (e.g., salary, commission, bonus, etc.) (Attach additional pages as necessary). MONTH MONTH MONTH MONTH MONTH (1) MONTH INSIDERS: NAME/COMP TYPE 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 1 T. Paul Bulmahn (salary) $ 17,767 $ 36,197 $ 36,798 $ 36,798 $ 36,798 $—2 Leland E. Tate (salary) 14,634 29,267 29,267 29,267 29,267 26,151 3 Leland E. Tate (bonus)—— 202,263—4 Albert L. Reese Jr. (salary) 11,577 23,154 24,863 24,863 24,863 19,348 5 Albert L. Reese Jr. (bonus)—— 194,172—6 George R. Morris (salary) 11,848 23,741 25,554 25,554 25,554 23,386 7 George R. Morris (bonus)—— 183,875—8 John E. Tschirhart (salary) 8,731 17,463 18,455 18,455 9,227—9 Keith R. Godwin (salary) 11,302 22,604 24,257 24,257 24,257 15,363 10 Keith R. Godwin (bonus)—— 182,404—TOTAL INSIDERS (MOR-1) $ 75,859 $ 152,426 $ 159,194 $ 159,194 $ 912,680 $ 84,248 MONTH MONTH MONTH MONTH MONTH MONTH PROFESSIONALS 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 Debtor Professionals (MOR-9B) $—$—$—$ 4,169,875 $ 1,893,728 $—DIP Lender Professionals (MOR-9B) 620,479 572,818 1,281,798 1,262,157 428,722 1,323,443 Committee Professionals (MOR-9B)—— 1,696,829—US Trustee (MOR-9B)—30,000—30,000 TOTAL PROFESSIONALS (MOR-1) $ 620,479 $ 572,818 $ 1,311,798 $ 5,432,032 $ 4,019,279 $ 1,353,443 MOR-9A (1) ATP made certain bonus payments to ATP insiders that are in the process of being repaid to the estate, which repayment will Revised 07/01/98 be complete by April 2013. Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 10 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 PAYMENTS TO PROFESSIONALS MONTH MONTH MONTH MONTH MONTH MONTH PROFESSIONALS 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1/31/2013 DEBTOR PROFESSIONALS Debtor Legal Advisors 1 Mayer Brown, LLP $—$—$—$ 2,084,621 $ 1,130,702 $—2 Munsch, Hardt, Kopf & Harr, PC——10,668 43,102—Debtor Financial Advisors 3 Jefferies & Company, Inc.——1,093,148 148,457—4 Opportune, LLP——534,924 471,467—Debtor Other 5 Kurtzman Carson Consultants, LLC——446,514—6 Blackhill Advisors, LP—— 100,000—TOTAL DEBTOR PROFESSIONALS (MOR-9A):——4,169,875 1,893,728—DIP LENDER PROFESSIONALS DIP Legal Advisors 7 Bingham McCutchen LLP 620,479—429,209 669,528—648,060 8 Cravath, Swaine & Moore LLP—572,818——387,855 9 Winstead PC—317,303 304,440—10 Haynes and Boone, LLP—— 215,069 21,300 11 Slaughter and May———27,254 12 De Brauw Blackstone———27,722 DIP Financial Advisors 13 Houlihan Lokey—535,286 164,133 152,036 159,780 DIP Other 14 Netherland Sewell & Associates, Inc.——40,540 61,617 41,378 15 Arthur C. Leblanc, Jr——83,516—16 Merrill Communications———10,094 TOTAL DIP PROFESSIONALS (MOR-9A): 620,479 572,818 1,281,798 1,262,157 428,722 1,323,443 COMMITTEE PROFESSIONALS Committee Legal Advisors 17 Milbank, Tweed, Hadley & McCloy, LLP—— 1,514,418—18 Porter Hedges, LLP—— 182,411—TOTAL COMMITTEE PROFESSIONALS (MOR-9A):—— 1,696,829—19 US Trustee Payment Center (MOR-9A) $—$—$ 30,000 $—$—$ 30,000 MOR-9B Revised 07/01/98 Case 12-36187 Document 1472 Filed in TXSB on 02/20/13 Page 11 of 11

EX-99.2

Exhibit 99.2 Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 1 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 COMPARATIVE BALANCE SHEETS ASSETS FILING DATE MONTH MONTH MONTH MONTH MONTH (1) MONTH 8/17/2012 8/31/2012 9/30/2012 10/31/2012 11/30/2012 12/31/2012 CURRENT ASSETS Cash $ 6,119,734 $ 47,144,872 $ 54,512,686 $ 39,600,277 $ 21,768,168 $ 27,461,947 Restricted Cash 4,840,908 14,841,112 82,549,173 39,780,233 32,834,527 6,761,481 Accounts Receivable, Net 48,962,845 48,202,892 51,860,095 49,641,379 43,065,163 44,230,795 Accounts Receivable, Related Party———762,714 Accounts Receivable, Affiliates 699,367,083 705,099,121 710,056,471 715,813,853 721,441,532 728,001,311 Prepaid Expenses and Other Current Assets 18,938,661 19,533,602 14,207,138 11,902,075 15,435,513 13,558,411 TOTAL CURRENT ASSETS 778,229,231 834,821,599 913,185,563 856,737,817 834,544,903 820,776,659 Oil & Gas Properties 2,914,007,759 2,939,625,568 2,988,835,104 2,962,670,018 2,958,065,891 2,974,039,661 Less Accumulated DD&A and Impairment 1,622,583,195 1,636,941,332 1,650,846,528 1,664,818,884 1,685,343,773 1,702,319,023 OIL & GAS PROPERTIES, NET 1,291,424,564 1,302,684,236 1,337,988,576 1,297,851,134 1,272,722,118 1,271,720,638 OTHER ASSETS 1. Deferred Tax Assets———2. Investments in Affiliates 892,154,554 888,614,697 869,098,552 864,632,911 860,285,519 854,658,147 3. Deferred Financing Costs—net 2,075,258 2,171,506 1,970,434 1,836,314 1,756,502 1,690,150 4. Furniture & Fixtures, net 482,093 463,201 440,959 418,736 396,666 374,663 5. Other Non-current Receivable 12,269,065 12,273,726 12,278,238 12,282,902 12,287,418 12,292,086 6. Non-current Restricted Cash———10,828,192 TOTAL ASSETS $ 2,976,634,765 $ 3,041,028,965 $ 3,134,962,322 $ 3,033,759,814 $ 2,981,993,126 $ 2,972,340,535 MOR-2 Revised 07/01/98 (1) The amendments to the December 2012 MOR relate to certain bonus payments to ATP insiders that are in the process of being repaid to the estate, which repayment will be complete by April 2013. The effect of this change is recorded as a receivable—related party with a corresponding credit to December 2012 compensation expense. Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 2 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 COMPARATIVE BALANCE SHEETS LIABILITIES & OWNERS’ FILING DATE MONTH MONTH MONTH MONTH MONTH (4) MONTH EQUITY 8/17/2012 8/31/2012 9/30/2012 10/31/2012 11/30/2012 12/31/2012 LIABILITIES POST-PETITION LIABILITIES(MOR-4) $—$ 501,051,920 $ 631,908,259 $ 559,111,503 $ 573,175,745 $ 606,981,811 PRE-PETITION LIABILITIES Secured obligations 2,014,806,960 1,650,999,715 1,648,605,960 1,651,917,233 1,666,895,379 1,666,667,861 Priority unsecured obligations 11,287,816 11,287,816 10,759,598 10,759,598 10,759,598 10,759,598 Unsecured obligations 251,241,600 251,241,600 198,576,609 191,241,071 153,633,566 154,530,858 Other pre-petition obligations———TOTAL CLAIMABLE PRE-PETITION LIABILITIES 2,277,336,376 1,913,529,131 1,857,942,167 1,853,917,902 1,831,288,543 1,831,958,317 Asset Retirement Obligation (1) 149,468,228 150,114,665 149,970,805 151,553,115 150,540,263 150,639,591 Derivative Liability 1,962,381———Other obligations (2) 544,832,478 510,150,491 536,415,044 520,685,753 504,590,990 486,816,091 TOTAL LIABILITIES 2,973,599,463 3,074,846,207 3,176,236,275 3,085,268,273 3,059,595,541 3,076,395,810 OWNERS’ EQUITY (DEFICIT) PREFERRED STOCK 277,406,044 277,406,044 277,406,044 136,457,044 136,457,044 136,457,044 COMMON STOCK 52,660 52,660 52,660 73,288 73,288 73,288 TREASURY STOCK (911,729) (911,729) (911,729) (911,729) (911,729) (911,729) ADDITIONAL PAID-IN CAPITAL 536,339,243 536,976,475 537,384,047 678,615,495 678,990,045 678,096,005 8/1-8/17 TRANSLATION ADJUSTMENT (3) 1,363,677———RETAINED EARNINGS: Filing Date (811,214,593) (811,214,593) (811,214,593) (811,214,593) (811,214,593) (811,214,593) RETAINED EARNINGS: Post Filing Date—(32,699,588) (37,323,566) (43,748,848) (65,899,091) (85,830,539) Equity in earnings of ATPIP and ATP Titan: Post Filing Date—(3,426,511) (6,666,816) (10,779,116) (15,097,379) (20,724,751) TOTAL OWNERS’ EQUITY (DEFICIT) 3,035,302 (33,817,242) (41,273,953) (51,508,459) (77,602,415) (104,055,275) TOTAL LIABILITIES & OWNERS’ EQUITY $ 2,976,634,765 $ 3,041,028,965 $ 3,134,962,322 $ 3,033,759,814 $ 2,981,993,126 $ 2,972,340,535 MOR-3 Revised 07/01/98 (1) (2) (3) (4) ARO represents GAAP present value estimate of future cash flows. ARO is subject to certain potential bonding requirements, some of which have not been determined as of the date of this filing. Other obligations include term NPI and ORRI interests which are accounted for as obligations under GAAP because they are granted on proved properties where production is reasonably assured. Amounts associated with these other obligations are not payable until production occurs. Our August 17 through August 31, 2012 income was estimated using an allocation of 15/31 days for certain line items. Our balance sheet line items represent the August 17 balances when possible; otherwise amounts presented represent July 31 balances. Because of this, an equity translation adjustment is required. The amendments to the December 2012 MOR relate to certain bonus payments to ATP insiders that are in the process of being repaid to the estate, which repayment will be complete by April 2013. The effect of this change is recorded as a receivable—related party with a corresponding credit to December 2012 compensation expense. Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 3 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 SCHEDULE OF POST-PETITION LIABILITIES MONTH MONTH MONTH MONTH MONTH MONTH 8/31/2012 9/30/2012 10/31/2012 11/30/2012 12/31/2012 TRADE ACCOUNTS PAYABLE (MOR-5) $ 11,682,314 $ 9,262,572 $ 4,618,385 $ 14,180,863 $ 15,322,843 ACCOUNTS PAYABLE—AFFILIATES—5,762,204 5,766,203 5,764,704 2,357,704 TAX PAYABLE Federal Payroll Taxes———State Payroll Taxes———Ad Valorem Taxes———Other Taxes———TOTAL TAXES PAYABLE———SECURED DEBT POST-PETITION 414,344,609 524,877,029 525,532,714 528,769,960 560,562,828 ACCRUED INTEREST PAYABLE 583,204 4,625,503 4,852,269 5,000,980 3,332,769 ACCRUED PROFESSIONAL FEES* 746,512 440,553 715,540—2,338,073 OTHER ACCRUED LIABILITIES 1. Payroll accruals———2. Other accruals 55,145,058 77,503,779 10,701,453 12,937,793 17,103,704 3. Other payables 18,550,223 9,436,619 6,924,939 6,521,445 5,963,890 TOTAL POST-PETITION LIABILITIES (MOR-3) $ 501,051,920 $ 631,908,259 $ 559,111,503 $ 573,175,745 $ 606,981,811 *Payment requires Court Approval MOR-4 Revised 07/01/98 Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 4 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 AGING OF POST-PETITION LIABILITIES MONTH 12/31/2012 DAYS TOTAL TRADE FEDERAL STATE AD VALOREM, ACCOUNTS TAXES TAXES OTHER TAXES 0-30 $ 15,143,819 $ 15,143,819 $—$—$—31-60 2,218 2,218——61-90 206,647 206,647——91+ (29,841) (29,841)——TOTAL $ 15,322,843 $ 15,322,843 $—$—$—AGING OF ACCOUNTS RECEIVABLE DAYS TOTAL Revenue Joint Interest (1) Other (2) 0-30 DAYS $ 36,653,573 $ 33,965,019 $ 2,688,554 $—31-60 DAYS—— 61-90 DAYS 361,944 (109) 362,053—91+ DAYS 6,925,955 (32,297) 6,067,166 891,086 TOTAL $ 43,941,472 $ 33,932,613 $ 9,117,773 $ 891,086 MOR-5 Revised 07/01/98 (1) 91+ day balance includes $2,013,375 of amounts being withheld over WI% dispute and $415,789 of amounts regarding Black Elk/Nippon lawsuit (2) 91+ day balance includes $793,841 due from Israel Tax Authority for VAT taxes and other East Med receivables Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 5 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 STATEMENT OF INCOME (LOSS) MONTH MONTH MONTH MONTH MONTH (1) MONTH FILING TO 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 DATE REVENUES (MOR-1) $ 17,962,067 $ 37,184,014 $ 36,306,806 $ 31,765,591 $ 32,224,068 $ 155,442,546—GROSS PROFIT 17,962,067 37,184,014 36,306,806 31,765,591 32,224,068 155,442,546 OPERATING EXPENSES: Lease Operating Expenses 3,596,446 7,405,660 7,072,186 8,386,269 8,814,772 35,275,333 Processing fees, related party 3,456,290 6,590,000 6,643,000 6,590,000 6,643,000 29,922,290 Depreciation, depletion and amortization 6,958,244 13,927,439 13,994,578 20,546,958 15,875,072 71,302,291 Impairment of oil and gas properties—— 1,122,182 1,122,182 Accretion 508,076 1,059,370 1,032,207 1,000,518 1,009,476 4,609,647 Abandonment(Gain)/Loss 32,108 130,910—(4,564) 158,454 Compensation Expense 778,853 1,165,292 1,359,794 1,265,270 821,145 5,390,354 Professional Fees 882,462 (35,889) 967,109 341,154 1,156,098 3,310,934 Other General & Administrative 131,419 76,284 224,881 (50,919) (23,259) 358,406 TOTAL OPERATING EXPENSES 16,343,898 30,319,066 31,293,755 38,079,250 35,413,922 151,449,891 INCOME (LOSS) FROM OPERATIONS (MOR-1) 1,618,169 6,864,948 5,013,051 (6,313,659) (3,189,854) 3,992,655 INTEREST INCOME 2,033,953 4,504,888 4,860,557 4,818,186 5,135,175 21,352,759 INTEREST (EXPENSE), NET (2,191,113) (13,303,416) (15,464,387) (16,457,399) (15,503,937) (62,920,252) DERIVATIVES GAIN/(LOSS)—(30,879) (972) 4,387 (49,716) (77,180) DEBT EXTINGUISHMENT GAIN/(LOSS) (6,937,100)—— (6,937,100) TOTAL INT, DER.& OTHER ITEMS (7,094,260) (8,829,407) (10,604,802) (11,634,826) (10,418,478) (48,581,773) NET INCOME (LOSS) BEFORE REORGANIZATION EXPENSES (5,476,091) (1,964,459) (5,591,751) (17,948,485) (13,608,332) (44,589,118) REORGANIZATION (EXPENSES): US Trustee fees (30,000)—(30,000)—(60,000) Professional fees (1,037,305) (2,659,519) (803,531) (4,201,758) (6,323,116) (15,025,229) Debt valuation adjustments———Claims adjustments (26,156,192)—— (26,156,192) Interest income———REORGANIZATION EXPENSES, NET: (27,223,497) (2,659,519) (833,531) (4,201,758) (6,323,116) (41,241,421) NET INCOME (LOSS) (MOR-1) $ (32,699,588) $ (4,623,978) $ (6,425,282) $ (22,150,243) $ (19,931,448) $ (85,830,539) Accrual Accounting Required, Otherwise Footnote with Explanation. MOR-6 Revised 07/01/98 (1) The amendments to the December 2012 MOR relate to certain bonus payments to ATP insiders that are in the process of being repaid to the estate, which repayment will be complete by April 2013. The effect of this change is recorded as a receivable—related party with a corresponding credit to December 2012 compensation expense. Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 6 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 CASH RECEIPTS AND MONTH MONTH MONTH MONTH MONTH MONTH FILING TO DISBURSEMENTS 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 DATE 1. CASH-BEGINNING OF MONTH $ 6,119,734 $ 47,144,872 $ 54,512,686 $ 39,600,277 $ 21,768,168 $ 6,119,734 RECEIPTS: 1. COLLECTION OF NET REVENUE ACCOUNTS RECEIVABLE 21,003,439 34,319,343 29,583,979 31,906,235 30,003,561 146,816,557 2. COLLECTION OF JOINT INTEREST ACCOUNTS RECEIVABLE—681,206 383,486 75,705 422,632 1,563,029 3. OTHER OPERATING RECEIPTS (MOR-7B)—310,803 115,223 653,805 96,689 1,176,520 4. FINANCING RECEIPTS (MOR-7B) 406,338,823 40,091,939 42,508,352 6,946,412 54,258,956 550,144,482 TOTAL RECEIPTS** 427,342,262 75,403,291 72,591,040 39,582,157 84,781,838 699,700,588 (Withdrawal) Contribution by Individual Debtor MFR-2* DISBURSEMENTS: 5. TERM-LIMITED ORRI 940,089 2,991,609 1,766,390 3,838,613 3,112,889 12,649,590 6. TERM-LIMITED NPI—12,645,837 21,087,710 16,535,724 18,117,033 68,386,304 7. DERIVATIVE SETTLEMENTS PAID (RECEIVED) 2,141,118 30,879 90,352 (4,387) 49,716 2,307,678 8. LEASE OPERATING COSTS—1,702,508 10,662,317 3,560,882 8,849,102 24,774,809 9. GOMEZ PIPELINE OBLIGATION 830,833 877,160 1,026,951 898,828—3,633,772 10. TITAN FEE 5,500,000 10,000,000 5,000,000 5,000,000 10,000,000 35,500,000 11. ATPIP FEES 1,571,182 1,571,682 1,518,682 1,571,682 (71,318) 6,161,910 12. GENERAL & ADMINISTRATIVE (MOR-7B) 437,500 2,264,864 2,129,975 1,650,573 3,681,736 10,164,648 13. OTHER OPERATING DISBURSEMENTS (MOR-7B)———TOTAL DISBURSEMENTS FROM OPERATIONS 11,420,722 32,084,539 43,282,377 33,051,915 43,739,158 163,578,711 14. CAPEX CASH DISBURSMENTS (MOR-7B)—34,933,676 38,100,489 14,214,751 24,455,908 111,704,824 15. BANKRUPTCY & PROFESSIONAL FEES (MOR-9A) 620,479 572,818 1,311,798 5,432,032 4,019,279 11,956,406 16. FINANCING PAYMENTS—PRINCIPAL AND INTEREST (MOR-7B) 374,275,923 444,444 4,808,785 4,715,568 6,873,714 391,118,434 TOTAL DISBURSEMENTS** 386,317,124 68,035,477 87,503,449 57,414,266 79,088,059 678,358,375 17. NET CASH FLOW 41,025,138 7,367,814 (14,912,409) (17,832,109) 5,693,779 21,342,213 18. CASH—END OF MONTH (MOR-2) $ 47,144,872 $ 54,512,686 $ 39,600,277 $ 21,768,168 $ 27,461,947 $ 27,461,947 * Applies to Individual debtors only MOR-7A **Numbers for the current month should balance (match) Revised 07/01/98 RECEIPTS and CHECKS/OTHER DISBURSEMENTS lines on MOR-8 Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 7 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 CASH RECEIPTS AND MONTH MONTH MONTH MONTH MONTH MONTH FILING TO DISBURSEMENTS DETAIL 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 DATE OTHER OPERATING RECEIPTS (Line 3) Miscellaneous $—$ 310,803 $ 115,223 $ 653,805 $ 96,689 $ 1,176,520 GENERAL & ADMINISTRATIVE (Line 12) Compensation 352,523 1,235,511 1,008,815 907,731 2,723,959 6,228,539 Rent—55,812 110,518—3,419 169,749 Office and general costs—89,235 82,965 11,151 13,253 196,604 Travel related—26,191 20,791 10,447 12,346 69,775 D&O 82,413 81,233 97,420 20,502 20,000 301,568 Other costs 2,564 776,882 809,466 700,742 908,759 3,198,413 GENERAL & ADMINISTRATIVE TOTAL 437,500 2,264,864 2,129,975 1,650,573 3,681,736 10,164,648 OTHER OPERATING DISBURSEMENTS (Line 13)———CAPEX CASH DISBURSMENTS (Line 14) Maintenance/Other—27,985—346,243 374,228 Clipper project—34,933,676 37,895,335 13,391,177 10,981,074 97,201,262 Gomez #9 project———Plugging and abandonment of oil and gas properties—177,169 823,574 13,128,591 14,129,334 CAPEX CASH DISBURSMENTS TOTAL—34,933,676 38,100,489 14,214,751 24,455,908 111,704,824 FINANCING PAYMENTS—PRINCIPAL AND INTEREST (Line 16) 1st lien principal and interest 367,338,823—— 367,338,823 New facility principal and interest 6,937,100 444,444 4,808,785 4,715,568 6,873,714 23,779,611 FINANCING PAYMENTS—PRINCIPAL AND INTEREST TOTAL 374,275,923 444,444 4,808,785 4,715,568 6,873,714 391,118,434 FINANCING RECEIPTS (Line 4) New facility proceeds $ 406,338,823 $ 40,091,939 $ 42,508,352 $ 6,946,412 $ 54,258,956 $ 550,144,482 MOR-7B Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 8 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 CASH ACCOUNT RECONCILIATION MONTH OF 12/31/2012 BANK NAME JPMorgan Chase JPMorgan Chase JPMorgan Chase JPMorgan Chase JPMorgan Chase Green Bank ACCOUNT NUMBER 113334321 1000027441 6300050955 58902066488 113400841 3300247239 ACCOUNT TYPE Operating Deposit Controlled Disbursement Cafeteria Plan Other Payroll TOTAL BANK BALANCE $ 29,562,450 $—$—$ 24,100 $—$ 325,138 $ 29,911,688 DEPOSITS IN TRANSIT————OUTSTANDING CHECKS—2,449,741——2,449,741 ADJUSTED BANK BALANCE $ 29,562,450 $—$ (2,449,741) $ 24,100 $—$ 325,138 $ 27,461,947 BEGINNING CASH—PER BOOKS $ 27,267,821 $—$ (5,785,405) $ 27,655 $—$ 258,097 $ 21,768,168 RECEIPTS* 81,202,110 3,579,728—— 84,781,838 TRANSFERS BETWEEN ACCOUNTS (17,112,640) (3,579,728) 17,901,368—2,791,000—(WITHDRAWAL) OR INDIVIDUAL CONTRIBUTION BY DEBTOR MFR-2————CHECKS/OTHER DISBURSEMENTS* 61,794,840—14,565,705 3,555—2,723,959 79,088,059 ENDING CASH—PER BOOKS $ 29,562,451 $—$ (2,449,742) $ 24,100 $—$ 325,138 $ 27,461,947 MOR-8 *Numbers should balance (match) TOTAL RECEIPTS and Revised 07/01/98 TOTAL DISBURSEMENTS lines on MOR-7A Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 9 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 PAYMENTS TO INSIDERS AND PROFESSIONALS Of the total disbursements shown for the month, list the amount paid to insiders (as defined in Section 101(31)(A)-(F) of the U.S. Bankruptcy Code) and the professionals. Also, for insiders, identify the type of compensation paid (e.g., salary, commission, bonus, etc.) (Attach additional pages as necessary). MONTH MONTH MONTH MONTH MONTH (1) MONTH INSIDERS: NAME/COMP TYPE 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 1 T. Paul Bulmahn (salary) $ 17,767 $ 36,197 $ 36,798 $ 36,798 $ 36,798 2 Leland E. Tate (salary) 14,634 29,267 29,267 29,267 29,267 3 Leland E. Tate (bonus)—— 202,263 4 Albert L. Reese Jr. (salary) 11,577 23,154 24,863 24,863 24,863 5 Albert L. Reese Jr. (bonus)—— 194,172 6 George R. Morris (salary) 11,848 23,741 25,554 25,554 25,554 7 George R. Morris (bonus)—— 183,875 8 John E. Tschirhart (salary) 8,731 17,463 18,455 18,455 9,227 9 Keith R. Godwin (salary) 11,302 22,604 24,257 24,257 24,257 10 Keith R. Godwin (salary)—— 182,404 TOTAL INSIDERS (MOR-1) $ 75,859 $ 152,426 $ 159,194 $ 159,194 $ 912,680 MONTH MONTH MONTH MONTH MONTH MONTH PROFESSIONALS 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 Debtor Professionals (MOR-9B) $—$—$—$ 4,169,875 $ 1,893,728 DIP Lender Professionals (MOR-9B) 620,479 572,818 1,281,798 1,262,157 428,722 Committee Professionals (MOR-9B)—— 1,696,829 US Trustee (MOR-9B)—30,000—TOTAL PROFESSIONALS (MOR-1) $ 620,479 $ 572,818 $ 1,311,798 $ 5,432,032 $ 4,019,279 MOR-9A (1) ATP made certain bonus payments to ATP insiders that are in the process of being repaid to the estate, which repayment will Revised 07/01/98 be complete by April 2013. Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 10 of 11

CASE NAME: ATP Oil & Gas Corporation CASE NUMBER: 12-36187 PAYMENTS TO PROFESSIONALS MONTH MONTH MONTH MONTH MONTH MONTH PROFESSIONALS 8/17/12 to 8/31/12 9/30/2012 10/31/2012 11/30/2012 12/31/2012 DEBTOR PROFESSIONALS Debtor Legal Advisors 1 Mayer Brown, LLP $—$—$—$ 2,084,621 $ 1,130,702 2 Munsch, Hardt, Kopf & Harr, PC——10,668 43,102 Debtor Financial Advisors 3 Jefferies & Company, Inc.——1,093,148 148,457 4 Opportune, LLP——534,924 471,467 Debtor Other 5 Kurtzman Carson Consultants, LLC——446,514—6 Blackhill Advisors, LP—— 100,000 TOTAL DEBTOR PROFESSIONALS (MOR-9A):——4,169,875 1,893,728 DIP LENDER PROFESSIONALS DIP Legal Advisors 7 Bingham McCutchen LLP 620,479—429,209 669,528—8 Cravath, Swaine & Moore LLP—572,818——9 Winstead PC—317,303 304,440—10 Haynes and Boone, LLP—— 215,069 DIP Financial Advisors 11 Houlihan Lokey—535,286 164,133 152,036 DIP Other 12 Netherland Sewell & Associates, Inc.——40,540 61,617 13 Arthur C. Leblanc, Jr——83,516—TOTAL DIP PROFESSIONALS (MOR-9A): 620,479 572,818 1,281,798 1,262,157 428,722 COMMITTEE PROFESSIONALS Committee Legal Advisors 14 Milbank, Tweed, Hadley & McCloy, LLP—— 1,514,418 15 Porter Hedges, LLP—— 182,411 TOTAL COMMITTEE PROFESSIONALS (MOR-9A):—— 1,696,829 16 US Trustee Payment Center (MOR-9A) $—$—$ 30,000 $—$—MOR-9B Revised 07/01/98 Case 12-36187 Document 1471 Filed in TXSB on 02/20/13 Page 11 of 11