ARCH CAPITAL GROUP LTD. — Director's Dealing 2017

May 10, 2017

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ARCH CAPITAL GROUP LTD. (ACGL)
CIK: 0000947484
Period of Report: 2017-05-08

Reporting Person: PETRILLO LOUIS T (Officer of Subsidiary)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2017-05-08	Common Shares, $.0033 par value per share	A	5720	—	Acquired	63033	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2017-05-08	Stock Option (right to buy)	$96.26	A	5720	Acquired	2027-05-08	Common Shares, $.0033 per share (5720)	Direct

Footnotes

F1: Represents restricted shares that vest in three equal annual installments on May 8th in each of 2018, 2019 and 2020, subject to the applicable award agreement.

F2: The stock option will become exercisable in three equal annual installments, with the first installment becoming exercisable on May 8, 2018 and the next two installments on May 8, 2019 and May 8, 2020, subject to the applicable award agreement.