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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 8-K
Current Report
Pursuant to Section 13 or 15 (d) of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event reported)—March 13, 2026
ASSURED GUARANTY LTD.
(Exact name of registrant as specified in its charter)

Bermuda | 001-32141 | 98-0429991
(State or other jurisdiction of incorporation or organization) | (Commission File Number) | (I.R.S. Employer Identification No.)

30 Woodbourne Avenue
Hamilton HM 08 Bermuda
(Address of principal executive offices)
Registrant’s telephone number, including area code: (441) 279-5700
Not applicable
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):
☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Securities registered pursuant to Section 12(b) of the Act:

Title of each class: | Trading Symbol(s) | Name of exchange on which registered
Common Shares | $0.01 par value per share | AGO | New York Stock Exchange
Assured Guaranty US Holdings Inc. 6.125% Senior Notes due 2028 (and the related guarantee of Registrant) | AGO/28 | New York Stock Exchange
Assured Guaranty US Holdings Inc. 3.150% Senior Notes due 2031 (and the related guarantee of Registrant) | AGO/31 | New York Stock Exchange
Assured Guaranty US Holdings Inc. 3.600% Senior Notes due 2051 (and the related guarantee of Registrant) | AGO/51 | New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 ( §240.12b-2 of this chapter).
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02 | Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

(b)
On March 13, 2026, Stephen Donnarumma, the Chief Credit Officer of Assured Guaranty Ltd. (“AGL” and together with its subsidiaries, the “Company”), notified the Company of his decision to retire from his position, effective September 30, 2026. From October 1, 2026 until April 2, 2027, Mr. Donnarumma will continue to serve the Company as a senior advisor to its Chief Executive Officer.
Mr. Donnarumma joined the Company in 1993 and has served as Chief Credit Officer of Assured Guaranty Inc., a wholly owned subsidiary of AGL, since 2007 and as Chief Credit Officer of AGL since 2018.
The Company is grateful to Mr. Donnarumma for his more than three decades of dedicated service and his significant contributions.
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

| Assured Guaranty Ltd.
| By: | /s/ Ling Chow
|  | Name: Ling Chow Title: General Counsel

DATE: March 19, 2026
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