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0 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ANNUAL REPORT PURSUANT TO 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 For the Transition Period from to Commission File No. 1-11778 CHUBB LIMITED ( Exact name of registrant as specified in its charter ) Switzerland ( State or other jurisdiction of incorporation or organization ) Baerengasse 32 Zurich , Switzerland CH - 8001 Title of each class Common Shares , par value CHF 24.15 per share Guarantee of Chubb INA Holdings Inc. 0.30 % Senior Notes due 2024 Guarantee of Chubb INA Holdings Inc. 0.875 % Senior Notes due 2027 Guarantee of Chubb INA Holdings Inc. 1.55 % Senior Notes due 2028 Guarantee of Chubb INA Holdings Inc. 0.875 % Senior Notes due 2029 Guarantee of Chubb INA Holdings Inc. 1.40 % Senior Notes due 2031 Guarantee of Chubb INA Holdings Inc. 2.50 % Senior Notes due 2038 Large accelerated filer Non - accelerated filer ( Address of principal executive offices ) ( Zip Code ) +41 ( 0 ) 43 456 76 00 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : 98-0091805 ( I.R.S. Employer Identification No. ) Trading Symbol ( s ) CB CB / 24A CB / 27 CB / 28 CB / 29A CB / 31 CB / 38A Name of each exchange on which registered New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes No 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 ( §232.405 of this chapter ) 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 . Accelerated filer Smaller reporting company Emerging growth company 0 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 . 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 Act ) . Yes No The aggregate market value of voting stock held by non - affiliates as of June 30 , 2020 ( the last business day of the registrant's most recently completed second fiscal quarter ) , was approximately $ 57 billion . For the purposes of this computation , shares held by directors and officers of the registrant have been excluded . Such exclusion is not intended , nor shall it be deemed , to be an admission that such persons are affiliates of the registrant . As of February 11 , 2021 , there were 450,224,906 Common Shares par value CHF 24.15 of the registrant outstanding . Documents Incorporated by Reference Certain portions of the registrant's definitive proxy statement relating to its 2021 Annual General Meeting of Shareholders are incorporated by reference into Part III of this report .