Publication of Proxy Statement

Kosmos Energy Ltd - Notice of ASM

For immediate release 2 May 2023

Kosmos Energy Ltd. (the "Company")

Publication of Proxy Statement

The Company's Proxy Statement on Schedule 14A pursuant to Section 14(a) of the Securities Exchange Act of 1934, dated 28 April 2023 (the "Proxy Statement"), has been submitted to the National Storage Mechanism and is available for inspection at:

https://data.fca.org.uk/#/nsm/nationalstoragemechanism.

A copy of the Proxy Statement is also available to view on the Investors' page of the Company's website at www.kosmosenergy.com and Forms of Instruction will be posted to stockholders in due course.

The 2023 annual stockholders meeting will be held in a virtual meeting webcast format only, at 8:00 a.m. CDT (2:00 p.m. BST) on Thursday, June 8, 2023.

CONTACT:

Investor Relations

Jamie Buckland

+44 203 954 2831

jbuckland@kosmosenergy.com

Media Relations

Thomas Golembeski

+1-214-445-9674

tgolembeski@kosmosenergy.com

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