Exhibit 99.1

NEWS RELEASE

KOSMOS ENERGY ANNOUNCES SECOND QUARTER 2012 RESULTS

COMPANY ALSO PROVIDES UPDATE ON JUBILEE AND 2012 CAPITAL PROGRAM

DALLAS, Texas, August 6, 2012 — Kosmos Energy (NYSE: KOS) announced today financial and operating results for the second quarter of 2012, including a net loss attributable to common shareholders of $25 million, or $0.07 per basic and diluted share. This compares to a pro forma net loss for the second quarter of 2011 of $0.03 per basic and diluted share.

Highlights for the quarter ended June 30, 2012, include:

·                  Sold one Jubilee lifting, totaling 997,000 barrels of oil, at a realized price of $112.60 per barrel

·                  Enhanced productivity of two additional Phase 1 wells at Jubilee through the acid stimulation program

·                  Flow tested the Ntomme-2A well at more than 20,000 barrels of oil per day combined from multiple zones

·                  Captured significant new acreage offshore Mauritania, adding 6.7 million gross acres to the Company’s exploration portfolio

·                  Executed a joint exploration agreement, subject to customary closing conditions, with Chevron regarding the Company’s offshore Suriname position

Brian F. Maxted, Chief Executive Officer, said, “Kosmos’ second quarter was highly focused on progressing both our near- and long-term growth strategies. At Jubilee, the production outlook is improved as we’ve made good progress resolving the productivity issues impacting Phase 1 wells and we are moving quickly toward first production from Phase 1A. In addition, we anticipate submitting the TEN plan of development for approval as our second offshore development later this year. Our 2012 exploration program is off to a great start with the Wawa discovery, and we have a number of important targets remaining this year, including two significant prospects in Ghana and our first operated well onshore Cameroon. Longer-term, we are making significant progress in the exploration of our other areas, where the processing of seismic data recently acquired offshore Morocco is advancing and we are preparing to initiate a large 3D seismic acquisition program offshore Suriname in the next few weeks.”

Second quarter 2012 oil revenues were $112 million versus $124 million in the second quarter of 2011, on sales of approximately 997,000 barrels of oil for each period. The second quarter 2012 lifting priced at $112.60 per barrel, or a premium to Dated Brent of approximately $0.77 per barrel. During the second quarter of 2012, Kosmos underlifted production by approximately 240,000 net barrels due to the timing of liftings versus production.

Production expense for the second quarter of 2012 was $20 million, including $10 million related to acid stimulation costs incurred on Jubilee Phase 1 wells. Excluding these costs, the Company’s production expense was approximately $9.37 per barrel sold, down from $14.36 per barrel for the same period last year. This significant reduction is primarily a result of the purchase of the Jubilee floating production,

storage and offloading vessel (FPSO) at year-end 2011, which capitalized the asset and ceased all forward lease payments.

Exploration expense in the second quarter of 2012 was $17 million, which included certain seismic, geologic and geophysical studies, as well as a portion of costs associated with the Teak-4A well. In the second quarter of 2011, exploration expense was primarily composed of unsuccessful well costs. General and administrative (G&A) costs were $35 million for the second quarter of 2012, with over 50 percent related to non-cash, equity-based compensation expense. Total G&A was up from the same period last year, primarily as a result of the Company’s growth and transition from a private to a public company in mid-2011. Depletion and depreciation expense was $33 million in the second quarter of 2012, up from $23 million in the second quarter of 2011. The increase is primarily a result of the capitalization of the Jubilee FPSO and the ongoing capital spending for development of the Jubilee field. In addition, the recording of year-end 2011 reserves impacted the 2012 depletion rate.

Income tax expense for the second quarter of 2012 was approximately $23 million, with approximately two-thirds incurred as a result of the taxable income associated with the Company’s Ghana operations. The remainder of the amount is primarily composed of a change in the Company’s deferred tax asset position related to equity compensation under the long-term incentive program.

Jubilee Update and 2012 Capital Outlook

As part of the ongoing production enhancement program at the Jubilee field offshore Ghana, Kosmos Energy and partners have performed acid stimulations on five Phase 1 production wells. Well productivity on each of the wells treated has been significantly enhanced.

Current production at the field is approximately 83,000 barrels of oil per day gross, with one well currently ramping up following acid stimulation. This represents the highest production level for the field to-date in 2012. Supported by the ongoing production enhancement program at Phase 1 and two new Phase 1A production wells to be brought online before the end of the year, Kosmos anticipates a higher production exit rate at year-end 2012.

With the success of the Company’s acid stimulation program at Jubilee, Kosmos Energy does not anticipate performing any further sidetrack operations in the current year. The removal of these sidetracks, along with updated appraisal plans on the Company’s West Cape Three Points Block, accounts for the majority of the reduction in the 2012 capital program, which is currently estimated to be $500 million.

Conference Call and Webcast Information

Kosmos will host a conference call and webcast to discuss second quarter 2012 financial and operating results today at 10:00 a.m. Central time (11:00 a.m. Eastern time). A live webcast of the event can be accessed on the Investors page of Kosmos’ website at www.kosmosenergy.com. The dial-in telephone number for the call is +1.877.407.3982. Callers outside the United States should dial +1.201.493.6780. A replay of the webcast will be available on the Investors page of Kosmos’ website for approximately 90 days following the event.

About Kosmos Energy

Kosmos Energy is a leading independent oil and gas exploration and production company focused on frontier and emerging areas in Africa and South America. The Company’s asset portfolio includes existing production, major discoveries and exploration prospects offshore Ghana, as well as exploration licenses with significant hydrocarbon potential offshore Mauritania, Morocco and Suriname and onshore Cameroon. Kosmos is listed on the New York Stock Exchange and is traded under the ticker symbol KOS. For additional information, visit www.kosmosenergy.com.

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements, other than statements of historical facts, included in this press release that address activities, events or developments that the Company expects, believes or anticipates will or may occur in the future are forward-looking statements.  The Company’s estimates and forward-looking statements are mainly based on its current expectations and estimates of future events and trends, which affect or may affect its businesses and operations. Although the Company believes that these estimates and forward-looking statements are based upon reasonable assumptions, they are subject to several risks and uncertainties and are made in light of information currently available to the Company. When used in this press release, the words “anticipate,” “believe,” “intend,” “expect,” “plan,” “will” or other similar words are intended to identify forward-looking statements. Such statements are subject to a number of assumptions, risks and uncertainties, many of which are beyond the control of the Company, which may cause actual results to differ materially from those implied or expressed by the forward-looking statements. Further information on such assumptions, risks and uncertainties is available in the Company’s Securities and Exchange Commission (“SEC”) filings.  The Company’s SEC filings are available on the Company’s website at www.kosmosenergy.com.  Kosmos undertakes no obligation and does not intend to update or correct these forward-looking statements to reflect events or circumstances occurring after the date of this press release, except as required by applicable law. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. All forward-looking statements are qualified in their entirety by this cautionary statement.

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CONTACT:

Investor Relations

Brad Whitmarsh

+1.214.445.9772

bwhitmarsh@kosmosenergy.com

Kosmos Energy Ltd.

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Kosmos Energy Ltd.

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