Sec Form 3 Filing - Enns Peter C. @ Chubb Ltd - 2021-07-01

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Enns Peter C. 2. Issuer Name and Ticker or Trading Symbol Chubb Ltd [ CB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive Vice President and* (Last) (First) (Middle) THE CHUBB BUILDING, 17 WOODBOURNE AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 07/01/2021 (Street) HAMILTON, D0HM 08 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares 26,136 ( 1 ) ( 2 ) ( 3 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Options to Acquire $ 158.99 ( 4 ) 04/01/2031 Common Shares 15,095 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Enns Peter C. THE CHUBB BUILDING 17 WOODBOURNE AVENUE HAMILTON, D0HM 08 Executive Vice President and* Signatures /s/ Samantha Froud, Attorney-in-fact 07/02/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Included in the total are 13,587 shares of restricted stock granted pursuant to the Chubb Limited 2016 Long-Term Incentive Plan (the "Plan"). These shares vests in equal installments on April 1, 2022, April 1, 2023, April 1, 2024 and April 1, 2025. ( 2 )Included in the total are 5,787 shares of restricted stock granted pursuant to the Plan. These shares vests on April 1, 2024 subject to the satisfaction of certain service and performance based criteria. ( 3 )Included in the total are 3,762 shares of restricted stock granted pursuant to the Plan, representing a premium performance award with respect to the performance restricted stock awards. These shares vest on April 1, 2024 subject to the satisfaction of certain service and performance based criteria. These shares will not be entitled to vote until vested. Dividends on these shares shall be accumulated and distributed only when, and to the extent, that the shares have vested. ( 4 )Options awarded pursuant to the plan. Options vest in equal installments on April 1, 2022, April 1, 2023 and April 1, 2024.

Remarks: *Chief Financial Officer

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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