X0306 4 2021-05-20 0 0000896159 Chubb Ltd CB 0001352881 SCULLY ROBERT W CHUBB BUILDING 17 WOODBOURNE AVENUE HAMILTON D0 HM 08 BERMUDA 1 0 0 0 Common Shares 2021-05-20 4 A 0 2047 A 25437 D Common Shares 2021-05-20 4 F 0 813 166.16 D 24624 D Common Shares 17450 I By Robert W Scully 2015 Revocable Trust Common Shares 2775 I By Daughter Restricted stock award granted as director fees under a Chubb Limited long-term incentive plan (the "Plan"), which meets the requirements of Rule 16b-3. Such restricted stock will vest on the day of the next annual Chubb Limited shareholders meeting, assuming the reporting person is a director of Chubb Limited on such date. Common Shares being withheld in order to pay tax liability. The reporting person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose. /s/ Samantha Froud, Attorney-in-fact 2021-05-24