News Release Details

Kosmos Energy Ltd files Form 8-K

On 19 December 2018, Kosmos Energy Ltd ("Kosmos") announced that it had elected to redomesticate in the State of Delaware. On 28 December 2018, Kosmos filed a Form 8-K with the U.S. Securities and Exchange Commission ("SEC") confirming that the redomestication will take effect on 28 December 2018, with Kosmos' ISIN and SEDOL changing to US5006881065 and BJ1MZF7 respectively after market close on this date. The Form 8-K is available on the SEC's website at http://www.sec.gov and on the Kosmos' website at http://investors.kosmosenergy.com/financial-information/sec-filings.

About Kosmos Energy Ltd

Kosmos is a full-cycle deepwater independent oil and gas exploration and production company focused along the Atlantic Margin. Our key assets include production offshore Ghana, Equatorial Guinea and U.S.Gulf of Mexico, as well as a world-class gas development offshore Mauritania and Senegal. We also maintain a sustainable exploration program balanced between proven basin short-cycle exploration (Equatorial Guinea and U.S.Gulf of Mexico), emerging basins (Mauritania, Senegal and Suriname) and frontier basins (Cote d'Ivoire, Namibia and Sao Tome and Principe). 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.

CONTACT:

Investor Relations

Jamie Buckland, +44 (0) 203 954 2831

jbuckland@kosmosenergy.com

or

Rhys Williams +1-214-445-9693

rwilliams@kosmosenergy.com

or

Media Relations

Thomas Golembeski, +1-214-445-9674

tgolembeski@kosmosenergy.com