Aspen Insurance Holdings Limited (AHL-PC) IRANNOTICE Disclosure regarding Iran Threat Reduction and Syria Human Rights Act

October 31, 2018

Michael Cain

Group General Counsel and Company Secretary

United States Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Re: Notice Pursuant to Section 13(r) of the Securities Exchange Act of 1934, as amended (the “Act”)

Ladies and Gentlemen:

Aspen Insurance Holdings Limited (the “Issuer”) hereby provides notice that disclosure of potential activity described in Section 13(r) of the Act has been included in the Issuer’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2018, which was filed with the U.S. Securities and Exchange Commission on October 31, 2018.

Respectfully submitted,

Aspen Insurance Holdings Limited

By: /s/ Michael Cain

Name: Michael Cain

Title: Group General Counsel and Company Secretary