Exhibit 99.1
MMMMMMMMMMMM Contango Oil & Gas Company MMMMMMMMMMMMMMM C123456789 IMPORTANT SPECIAL MEETING INFORMATION 000004 000000000.000000 ext 000000000.000000 ext ENDORSEMENT_LINE SACKPACK 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext MR A SAMPLE Electronic Voting Instructions DESIGNATION (IF ANY) Available 24 hours a day, 7 days a week! ADD 1 ADD 2 Instead of mailing your proxy, you may choose one of the voting ADD 3 methods outlined below to vote your proxy. ADD 4 VALIDATION DETAILS ARE LOCATED BELOW IN THE TITLE BAR. MMMMMMMMM ADD 5 Proxies submitted by the Internet or telephone must be received by ADD 6 1:00 a.m., Central Time, on October 1, 2013. Vote by Internet Go to www.investorvote.com/MCF Or scan the QR code with your smartphone Follow the steps outlined on the secure website Vote by telephone Call toll free 1-800-652-VOTE (8683) within the USA, US territories & Canada on a touch tone telephone Follow the instructions provided by the recorded message Using a black ink pen, mark your votes with an X as shown in X this example. Please do not write outside the designated areas. Special Meeting Proxy Card 1234 5678 9012 345 qIF YOU HAVE NOT VOTED VIA THE INTERNET OR TELEPHONE, FOLD ALONG THE PERFORATION, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q A Proposals — The Board of Directors recommends you vote FOR proposals 1, 2 and 3. For Against Abstain For Against Abstain + 1. To approve the issuance of shares of Contango Oil & 2. To approve, on an advisory (non-binding) Gas Company common stock, par value $0.04 per basis, the compensation that may be paid or share, to Crimson Exploration Inc. stockholders in become payable to Contango’s named connection with the merger contemplated by the executive officers that is based on or otherwise Agreement and Plan of Merger, dated as of April 29, related to the proposed transactions. 2013, by and among Contango Oil & Gas Company, Contango Acquisition, Inc. and Crimson Exploration Inc. 3. To approve the adjournment of the special meeting to a later date, if necessary or appropriate, to solicit additional proxies in the event there are not sufficient votes at the time of the special meeting to approve the merger proposal. B Non-Voting Items Change of Address — Please print your new address below. Comments — Please print your comments below. Meeting Attendance Mark the box to the right if you plan to attend the Annual Meeting. C Authorized Signatures — This section must be completed for your vote to be counted. — Date and Sign Below Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name, by authorized officer. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. C 1234567890 J N T MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE 140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MMMMMMM1UP X 1 6 6 6 2 5 1 MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND + 01O63E
Important Notice Regarding the Availability of Proxy Materials for the Special Meeting: The Notice of Special Meeting and Joint Proxy Statement/Prospectus is/are available at www.contango.com/vote. qIF YOU HAVE NOT VOTED VIA THE INTERNET OR TELEPHONE, FOLD ALONG THE PERFORATION, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q Proxy — CONTANGO OIL & GAS COMPANY THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS SPECIAL MEETING OF STOCKHOLDERS October 1, 2013 The undersigned hereby revokes all prior proxies and appoints Joseph J. Romano and Brad Juneau, and each of them, as proxies with full powers of substitution, to represent and to vote all of the shares of common stock of Contango Oil & Gas Company that the undersigned is entitled to vote at the special meeting of stockholders to be held on October 1, 2013 at 9:30 a.m., Central Daylight Time, at 3700 Buffalo Speedway, Second Floor, Houston, Texas 77098, and at any adjournment or postponement thereof. THIS PROXY, WHEN PROPERLY EXECUTED, WILL BE VOTED IN THE MANNER DIRECTED HEREIN BY THE UNDERSIGNED STOCKHOLDER. IF NO SPECIFIC DIRECTION IS GIVEN, THE PROXY WILL BE VOTED “FOR” EACH OF THE PROPOSALS SET FORTH ON THE REVERSE SIDE. The proxies are authorized to vote in their discretion upon such other matters as may properly be brought before the special meeting of stockholders or any adjournment or postponement of it. (If you noted any Address Changes and/or Comments above, please mark corresponding box on the reverse side.) Continued and to be signed on reverse side