Chubb Ltd — Director's Dealing 2010

May 20, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ACE Ltd (ACE)
CIK: 0000896159
Period of Report: 2010-05-18

Reporting Person: BANCROFT PHILIP V (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-05-18	Common Shares	A	4750	—	Acquired	180032	Direct
2010-05-18	Common Shares	F	4410	$52.75	Disposed	175622	Direct

Footnotes

F1: Represents a premium award pursuant to the ACE Limited 2004 Long-Term Incentive Plan. As disclosed in the Company's Current Report on Form 8-K dated February 28, 2006, the reporting person was entitled to a premium performance award equal to 100% of the number of actual shares earned from the target award granted on February 22, 2006 if the Company's cumulative performance over the four year performance period exceeded the peer group's 75th percentile. On May 18, 2010, the Compensation Committee determined that such performance measure had been met and the premium shares were issued.

F2: Common Shares being withheld to pay tax liability.