X0306 4 2020-12-07 0 0000896159 Chubb Ltd CB 0001577594 BOROUGHS TIMOTHY ALAN THE CHUBB BUILDING, 17 WOODBOURNE AVENUE HAMILTON D0 HM 08 BERMUDA 0 1 0 0 Executive Vice President* Common Shares 2020-12-07 4 M 0 17321 85.39 A 185465 D Common Shares 2020-12-07 4 S 0 17321 152.45 D 168144 D Common Shares 3260 I Family Foundation Options to Acquire Common Shares 85.39 2020-12-07 4 M 0 17321 0.00 D 2023-02-28 Common Shares 17321 105244 D The Common Shares reported herein as being sold were sold at a range of between $152.37 and $152.63 per share. The sale price reported above represents the weighted average sale price for the reported transaction and has been rounded to the nearest cent. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such price range. Options vested as follows: 1/3 on February 28, 2014, 1/3 on February 28, 2015 and 1/3 on February 28, 2016. All options of this tranche have been exercised. Total includes options from other tranches with different exercise prices, vesting and expiration dates. *& Chief Investment Officer, Chubb Limited /s/ Samantha Froud, Attorney-in-fact 2020-12-09