KOSMOS ENERGY ANNOUNCES FIRST QUARTER 2025 RESULTS

DALLAS - May 6, 2025-- Kosmos Energy Ltd. ("Kosmos" or the "Company") (NYSE/LSE: KOS) announced today its financial and operating results for the first quarter of 2025. For the quarter, the Company generated a net loss of $111 million, or $0.23 per diluted share. When adjusted for certain items that impact the comparability of results, the Company generated an adjusted net loss⁽¹⁾ of $105 million, or $0.22 per diluted share for the first quarter of 2025.

FIRST QUARTER 2025 HIGHLIGHTS

•     Net Production(2): ~60,500 barrels of oil equivalent per day (boepd), with sales of ~49,600 boepd, underlifted by approximately 1.0 million barrels of oil equivalent (mmboe)

•     Revenues: $290 million, or $65.27 per boe (excluding the impact of derivative cash settlements)

•     Production expense: $167 million ($24.99 per boe excluding $58.1 million of production expenses associated with the Greater Tortue Ahmeyim (GTA) liquefied natural gas (LNG) project)

•     Capital expenditures: $86 million

•     Post quarter end, commenced export from the GTA project offshore Mauritania & Senegal in April 2025; Currently lifting a second cargo

•     Completed the 4D seismic survey over Jubilee and TEN that will be used to high grade the 2026+ drilling campaign

•    Successfully completed the Spring reserve-based lending facility (RBL) redetermination maintaining the $1.35 billion facility size

Commenting on the Company's first quarter 2025 performance, Chairman and Chief Executive Officer Andrew G. Inglis said: "While the macro backdrop continues to be volatile, Kosmos' priorities announced with our full year 2024 results in February remain unchanged - the delivery of free cash flow from increasing production and a rigorous focus on costs. We are seeing evidence of this with a material reduction in year-on-year capex in the first quarter and production starting to rise in the second quarter after heavy scheduled 1Q maintenance.

Operationally, the GTA partnership achieved a major milestone in April exporting the first cargo from the project, with a second currently loading. Production is ramping up to the contracted sales volume, with potential to push higher towards, or beyond, the nameplate capacity of the floating LNG (FLNG) vessel of 2.7 mtpa. In Ghana, the partnership completed the 4D seismic survey. This new seismic data, combined with the latest processing techniques, will support the high grading of the future infill drilling program.

Financially, the actions taken in 2024 to improve the resilience of the company enable Kosmos to better withstand the current market volatility. We concluded the spring RBL redetermination with a strong reserve base supporting the $1.35 billion facility capacity, with ample liquidity. In addition, we continue to focus on reducing the company's capex and overhead costs and are delivering the targeted reductions.

The long-term outlook for our portfolio of high-quality assets remains positive. A 2P reserves-to-production ratio of over 20 years supports the long-term potential of Kosmos as we focus in the near term on cash generation, cost control and debt paydown."

FINANCIAL UPDATE

Net capital expenditure for the first quarter of 2025 was $86 million, below guidance primarily due to the Ghana 4D seismic campaign coming in under budget and a one-month delay in drilling Winterfell-4. We are working to reduce full year 2025 capex below the $400 million guidance given with the full year 2024 results.  In addition, we have made significant progress on the $25 million overhead reduction target.

Operating costs per barrel of oil equivalent were in line with guidance, but higher year on year, reflecting the lower production and higher maintenance in the first quarter of 2025, including a construction support vessel at Jubilee prior to and during the scheduled shutdown and the Winterfell-3 workover.

In March, Kosmos successfully concluded the RBL redetermination, maintaining a facility size of $1.35 billion which is supported by a borrowing base that is materially higher, at a long-term price deck below the current forward curve.

The Company generated net cash provided by operating activities of approximately $(1) million and free cash flow⁽¹⁾ of approximately $(91) million. As previously signaled, the first quarter free cash flow was impacted by the timing of liftings, heavy scheduled maintenance across the portfolio, and no cash flow contribution from GTA sales in the first quarter.

Kosmos exited the first quarter of 2025 with approximately $2.85 billion of net debt⁽¹⁾ and available liquidity of approximately $400 million. Post quarter end, Kosmos continued its rolling hedging program adding an additional two million barrels of oil. The company now has approximately 40% of remaining 2025 oil production hedged with a floor of approximately $65/boe and a ceiling of approximately $80/boe.

OPERATIONAL UPDATE

Production

Total net production⁽²⁾ in the first quarter of 2025 averaged approximately 60,500 boepd, impacted by planned shutdowns at Jubilee in Ghana and at the Kodiak host facility in the Gulf of America. Both shutdowns have been completed, with no major scheduled shutdowns for the remainder of the year. Production was slightly below guidance primarily due to the delayed ramp-up at GTA. Full year 2025 production guidance for GTA remains at 20-25 gross cargos as production ramps up towards the annual contracted level. Full year 2025 company production guidance is unchanged at 70,000 - 80,000 boepd.

The Company exited the quarter in a net underlift position of approximately 1.2 mmboe.

Mauritania and Senegal

The GTA project successfully exported its first LNG cargo in early April, a major milestone for the project. Production has continued to ramp-up with a second cargo currently lifting. Production in the first quarter averaged approximately 1,300 boepd net (7.8 mmcfd). All four FLNG trains are now operational and are being tested at ~10% above the nameplate capacity. Additionally, the subsurface is performing ahead of expectations, with higher connected volumes potentially reducing the number of future wells required.

Near-term, the partnership is continuing to work to reduce operating costs on GTA phase 1, eliminating duplicate costs related to the handover from commissioning to operations. We are also actively progressing the FPSO refinancing which is expected to be completed in the second half of the year. The operator is also investigating alternative operating models that could further materially reduce costs.

The partnership has commenced work on Phase 1+, a low-cost brownfield expansion of the development that is expected to double gas sales through increased LNG production and domestic gas. The expansion would leverage existing infrastructure put in place for the initial phase of GTA with low-cost upgrades to existing facilities that should drive materially lower unit costs and enhance overall project returns.

Ghana

Production in Ghana averaged approximately 33,000 boepd net in the first quarter of 2025. Kosmos lifted two cargos from Ghana during the quarter, in line with guidance.

At Jubilee (38.6% working interest), oil production in the first quarter averaged approximately 66,600 bopd gross, reflecting the scheduled FPSO shutdown that ran from March 25, 2025 to April 8, 2025. The shutdown was completed safely and on budget.

The Noble Venturer rig is due to arrive later this month to drill two Jubilee wells in 2025. The rig is scheduled to undertake a four-well drilling campaign on Jubilee in 2026, which will benefit from the 4D seismic data that is currently being processed with state-of-the-art algorithms.

In the first quarter of 2025, gas production net to Kosmos was approximately 5,300 boepd in line with expectations.

At TEN (20.4% working interest), oil production averaged approximately 16,900 bopd gross for the first quarter.

Gulf of America

Production in the Gulf of America averaged approximately 17,200 boepd net (~85% oil) during the first quarter reflecting the scheduled Kodiak shutdown. Remediation of the Winterfell-3 well was unsuccessful and the partnership is currently evaluating a future sidetrack to produce those reserves. Drilling of the Winterfell-4 well is currently underway and is expected online in the third quarter of 2025.

On Tiberius, Kosmos (operator, 50% working interest) continues to progress the development with our partner Oxy (50% working interest), evaluating opportunities to further enhance the project. This has resulted in a lower cost development, which will be supported by new ocean bottom node (OBN) seismic data being acquired this year.

Equatorial Guinea

Production in Equatorial Guinea averaged approximately 25,700 bopd gross and 9,000 bopd net in the first quarter. Kosmos lifted 0.5 cargos from Equatorial Guinea during the quarter, in line with guidance.

For the remainder of the year, production should be supported through a cost effective well work program.

(1) A Non-GAAP measure, see attached reconciliation of non-GAAP measure.

(2) Production means net entitlement volumes. In Ghana, Equatorial Guinea, and Mauritania and Senegal this means those volumes net to Kosmos' working interest or participating interest and net of royalty or production sharing contract effect. In the Gulf of America, this means those volumes net to Kosmos' working interest and net of royalty.

Conference Call and Webcast Information

Kosmos will host a conference call and webcast to discuss first quarter 2025 financial and operating results today, May 6, 2025, at 10:00 a.m. Central time (11:00 a.m. Eastern time). The live webcast of the event can be accessed on the Investors page of Kosmos' website at http://investors.kosmosenergy.com/investor-events. The dial-in telephone number for the call is +1-877-407-0784. Callers in the United Kingdom should call 0800 756 3429. Callers outside the United States should dial +1-201-689-8560. 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 deepwater exploration and production company focused on meeting the world's growing demand for energy. We have diversified oil and gas production from assets offshore Ghana, Equatorial Guinea, Mauritania, Senegal and the Gulf of America. Additionally, in the proven basins where we operate we are advancing high-quality development opportunities, which have come from our exploration success. Kosmos is listed on the NYSE and LSE and is traded under the ticker symbol KOS. As an ethical and transparent company, Kosmos is committed to doing things the right way. The Company's Business Principles articulate our commitment to transparency, ethics, human rights, safety and the environment. Read more about this commitment in the Kosmos Sustainability Report. For additional information, visit www.kosmosenergy.com.

Non-GAAP Financial Measures

EBITDAX, Adjusted net income (loss), Adjusted net income (loss) per share, free cash flow, and net debt are supplemental non-GAAP financial measures used by management and external users of the Company's consolidated financial statements, such as industry analysts, investors, lenders and rating agencies. The Company defines EBITDAX as Net income (loss) plus (i) exploration expense, (ii) depletion, depreciation and amortization expense, (iii) equity based compensation expense, (iv) unrealized (gain) loss on commodity derivatives (realized losses are deducted and realized gains are added back), (v) (gain) loss on sale of oil and gas properties, (vi) interest (income) expense, (vii) income taxes, (viii) debt modifications and extinguishments, (ix) doubtful accounts expense and (x) similar other material items which management believes affect the comparability of operating results. The Company defines Adjusted net income (loss) as Net income (loss) adjusted for certain items that impact the comparability of results. The Company defines free cash flow as net cash provided by operating activities less Oil and gas assets, Other property, and certain other items that may affect the comparability of results and excludes non-recurring activity such as acquisitions, divestitures and National Oil Company ("NOC") financing. NOC financing refers to the amounts funded by Kosmos under the Carry Advance Agreements that the Company has in place with the national oil companies of each of Mauritania and Senegal related to the financing of the respective national oil companies' share of certain development costs at Greater Tortue Ahmeyim. The Company defines net debt as total long-term debt less cash and cash equivalents and total restricted cash.

We believe that EBITDAX, Adjusted net income (loss), Adjusted net income (loss) per share, free cash flow, Net debt and other similar measures are useful to investors because they are frequently used by securities analysts, investors and other interested parties in the evaluation of companies in the oil and gas sector and will provide investors with a useful tool for assessing the comparability between periods, among securities analysts, as well as company by company. EBITDAX, Adjusted net income (loss), Adjusted net income (loss) per share, free cash flow, and net debt as presented by us may not be comparable to similarly titled measures of other companies.

This release also contains certain forward-looking non-GAAP financial measures, including free cash flow. Due to the forward-looking nature of the aforementioned non-GAAP financial measures, management cannot reliably or reasonably predict certain of the necessary components of the most directly comparable forward-looking GAAP measures, such as future impairments and future changes in working capital. Accordingly, we are unable to present a quantitative reconciliation of such forward-looking non-GAAP financial measures to their most directly comparable forward-looking GAAP financial measures. Amounts excluded from these non-GAAP measures in future periods could be significant.

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 Kosmos expects, believes or anticipates will or may occur in the future are forward-looking statements. Kosmos' 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 Kosmos 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 Kosmos. 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 Kosmos, 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 Kosmos' Securities and Exchange Commission ("SEC") filings. 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.

###