Petrillo Louis T. - 03 Mar 2026 Form 4 Insider Report for ARCH CAPITAL GROUP LTD. (ACGL)

Reporting relationship: Officer of Subsidiary
Issuer ticker: ACGL
Reported as of: 03 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Mar 2026, 16:19:04 UTC
Prior SEC filing: 02 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Louis Petrillo

Key filing fact

Petrillo Louis T. filed Form 4 for ARCH CAPITAL GROUP LTD. (ACGL) on 05 Mar 2026.

Key facts

This page summarizes Petrillo Louis T.'s Form 4 filing for ARCH CAPITAL GROUP LTD. (ACGL).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 05 Mar 2026, 16:19.

Change

Previous filing in this sequence was filed on 02 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001227095 Primary reporting owner

PETRILLO LOUIS T

Relationship: Officer of Subsidiary
Address: ARCH CAPITAL SERVICES LLC, 360 HAMILTON AVENUE, SUITE 600, WHITE PLAINS
Signature: /s/ Louis Petrillo
Signature date: 05 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ACGL transaction

Common Shares, $.0011 par value per share

Award

Transaction value
Shares: +2,889
Change %: +1.8%
Price: $0.000000^*
Shares after: 159,520
Date: 03 Mar 2026
Ownership: Direct

ACGL transaction

Common Shares, $.0011 par value per share

Tax liability

Transaction value
Shares: -8,030
Change %: -5%
Price: $98.42^*
Shares after: 151,490
Date: 04 Mar 2026
Ownership: Direct

ACGL holding

Common Shares, $.0011 par value per share

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 100
Date: 03 Mar 2026
Ownership: By Household
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ACGL transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value
Shares: +10,331
Change %
Price: $0.000000^*
Shares after: 10,331
Date: 03 Mar 2026
Ownership: Direct
Underlying class: Common Shares, $.0011 par value per share
Underlying amount: 10,331
Exercise price: $100.48
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

These shares are owned by the reporting person's step sons, who share the reporting person's household.

Footnote F2

This stock option is exercisable in three equal annual installments commencing March 3, 2027, and the next two installments on March 3, 2028 and March 3, 2029, subject to the applicable award agreement.