August 7, 2017

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

RE: Notice of disclosure filed in Exchange Act Quarterly Report under Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012 and Section 13(r) of the Exchange Act

Ladies and Gentlemen:

Pursuant to Section 219 of the Iran Threat Reduction and Syria Human Rights Act of 2012 and Section 13(r) of the Securities Exchange Act of 1934, as amended, notice is hereby provided that Kosmos Energy Ltd. has made disclosure pursuant to those provisions in its Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2017, which was filed with the U.S. Securities and Exchange Commission on August 7, 2017.

Respectfully submitted,

Kosmos Energy Ltd.

c/o Kosmos Energy, LLC 8176 Park Lane, Suite 500 Dallas, Texas 75231 Phone 214-445-9600 Fax

214 363 9024