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Table of Contents ☑ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT UNDER SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 Or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Bermuda For the transition period from to Commission File Number 001-32141 ASSURED GUARANTY LTD . ( State or other jurisdiction of incorporation ) ( Exact name of Registrant as specified in its charter ) 98-0429991 ( I.R.S. employer identification no . ) 30 Woodbourne Avenue , Hamilton HM 08 Bermuda ( 441 ) 279-5700 ( Address , including zip code , and telephone number , including area code , of Registrant's principal executive office ) None ( Former name , former address and former fiscal year , if changed since last report ) Securities registered pursuant to Section 12 ( b ) of the Act : Common Shares Assured Guaranty Municipal Holdings Inc. 6-7 / 8 % $ 100,000,000 Quarterly Interest Bonds due 2101 ( and the related guarantee of Registrant ) Title of each class : $ 0.01 per share Trading Symbol ( s ) Name of exchange on which registered AGO New York Stock Exchange AGO PRB New York Stock Exchange Assured Guaranty Municipal Holdings Inc. 6.25 % $ 230,000,000 Quarterly Interest Bonds due 2102 ( and the related guarantee of Registrant ) AGO PRE New York Stock Exchange Assured Guaranty Municipal Holdings Inc. 5.60 % $ 100,000,000 Quarterly Interest Bonds due 2103 ( and the related guarantee of Registrant ) AGO PRF New York Stock Exchange Assured Guaranty US Holdings Inc. 5.000 % $ 500,000,000 Senior Notes due 2024 ( and the related guarantee of Registrant ) AGO 24 New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : None No ☐ Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes ☐ No ☑ Indicate by check mark whether the registrant : ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the Registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ☑ No ◎ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . Yes ☑No ☐ Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Large accelerated filer Non - accelerated filer ☑ ☐ Accelerated filer Smaller reporting company 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 . ㅁㅁㅁ Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . ☑ Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes ☐ No ☑