Arch Capital (ACGL)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-18 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: ARCH CAPITAL GROUP LTD. (ACGL) CIK: 0000947484 --- Reporting Owner --- Name: Morin Francois CIK: 0001741826 Role: Officer (CFO and Treasurer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Shares, $.0011 par value per share Date: 2026-08-18 | Code: M (Exercise of derivative) Shares: +11,010 | Price: $27.09 Total Value: $298,224.57 Shares Owned After: 195,836 | Ownership: D (Direct) [Transaction #2] Security: Common Shares, $.0011 par value per share Date: 2026-08-18 | Code: S (Open market sale) Shares: -11,010 | Price: $99.32 Total Value: $1,093,528.61 Shares Owned After: 184,826 | Ownership: D (Direct) Footnotes: [F1] The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $99.14 to $99.56. Upon request, the full information regarding the number of shares sold at each separate price within the range will be provided to the issuer, any security holder of the issuer or the staff of the Securities Exchange Commission. [F2] Amount includes 267 Common Shares acquired on May 29, 2026 under the Arch Capital Group Ltd. Employee Share Purchase Plan. --- Derivative Transactions --- [Transaction #1] Security: Stock Option (Right to Buy) Date: 2026-08-18 | Code: M (Exercise of derivative) Shares: -11,010 | Price: $0.00 Exercisable: N/A | Expires: 2027-05-08 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F4] This stock option is exercisable in three equal annual installments commencing May 8, 2018, and the next two installments on May 8, 2019 and May 8, 2020, subject to the applicable award agreement. --- Holdings --- [Holding #1] Security: Common Shares, $.0011 par value per share Ownership: I (Indirect) Footnotes: [F3] The shares were previously owned directly in a joint account with the insider's spouse and were contributed to a revocable trust for the benefit of the insider's spouse. --- Footnotes (Complete Index) --- F1: The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $99.14 to $99.56. Upon request, the full information regarding the number of shares sold at each separate price within the range will be provided to the issuer, any security holder of the issuer or the staff of the Securities Exchange Commission. F2: Amount includes 267 Common Shares acquired on May 29, 2026 under the Arch Capital Group Ltd. Employee Share Purchase Plan. F3: The shares were previously owned directly in a joint account with the insider's spouse and were contributed to a revocable trust for the benefit of the insider's spouse. F4: This stock option is exercisable in three equal annual installments commencing May 8, 2018, and the next two installments on May 8, 2019 and May 8, 2020, subject to the applicable award agreement. --- Signature --- /s/ /s/ Louis Petrillo, Attorney-in-Fact (2026-08-20)