EX-32.1 11 dex321.htm CERTIFICATION OF CEO PURSUANT TO 18 U.S.C SECTION 1350

EXHIBIT 32.1

Certification of CEO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Annual Report on Form 10-K of Ambac Financial Group, Inc. (the “Company”) for the year ended December 31, 2010, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), David W. Wallis, as Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ David W. Wallis
Name: David W. Wallis Title: President and Chief Executive Officer Date: March 16, 2011