Kosmos Energy Ltd. (Kosmos) (NYSE: KOS) notes announcement by Tullow Oil plc (Tullow) (LSE: TLW) regarding a potential transaction involving Tullow and Kosmos and confirms that it is in very preliminary discussions with Tullow regarding a possible all-share offer by Kosmos for Tullow.

There can be no certainty that any offer will be made, nor as to the terms on which any offer might be made. Pursuant to Rule 2.5 of the Code, Kosmos reserves the right to vary the form and/or mix of the offer consideration and vary the transaction structure. A further announcement will be made as and when appropriate.

As stated in today’s announcement by Tullow, in accordance with Rule 2.6(a) of the Code, Kosmos is required, by not later than 5.00 p.m. on 9 January 2025, to either announce a firm intention to make an offer for Tullow in accordance with Rule 2.7 of the Code or announce that it does not intend to make an offer, in which case the announcement will be treated as a statement to which Rule 2.8 of the Code applies. This deadline can be extended with the consent of the Takeover Panel in accordance with Rule 2.6(c) of the Code.

About KOSMOS

Kosmos is a full-cycle deepwater, independent oil and gas exploration and production company focused along the offshore Atlantic Margins. Our key assets include production offshore Ghana, Equatorial Guinea and the U.S. Gulf of Mexico, as well as a world-class gas development offshore Mauritania and Senegal. We also pursue a proven basin exploration program in Equatorial Guinea, Ghana and the U.S. Gulf of Mexico. Kosmos is listed on the New York Stock Exchange and London Stock Exchange 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.

About Tullow

Tullow is an independent energy company that is building a better future through responsible oil and gas development in Africa.