Arch Capital (ACGL)

=== SEC Form 3 — Statement of Changes in Beneficial Ownership === Document Type: 3 Period of Report: 2026-09-03 --- Issuer --- Name: ARCH CAPITAL GROUP LTD. (ACGL) CIK: 0000947484 --- Reporting Owner --- Name: Halgan Jerome CIK: 0001869662 Role: Officer (CEO, Arch Glob Reinsurance Grp) --- Holdings --- [Holding #1] Security: Common Shares, $.0011 par value per share Ownership: D (Direct) [Holding #2] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F1] 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. [Holding #3] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F2] This stock option is exercisable in three equal annual installments commencing December 28, 2018, and the next two installments on December 28, 2019 and December 28, 2020, subject to the applicable award agreement. [Holding #4] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F3] This stock option is exercisable in three equal annual installments commencing May 11, 2019, and the next two installments on May 11, 2020 and May 11, 2021, subject to the applicable award agreement. [Holding #5] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F4] This stock option is exercisable in three equal annual installments commencing February 28, 2020, and the next two installments on February 28, 2021 and February 28, 2022, subject to the applicable award agreement. [Holding #6] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F5] This stock option is exercisable in three equal annual installments commencing February 27, 2021, and the next two installments on February 27, 2022 and February 27, 2023, subject to the applicable award agreement. [Holding #7] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F6] This stock option is exercisable in three equal annual installments commencing February 26, 2022, and the next two installments on February 26, 2023 and February 26, 2024, subject to the applicable award agreement. [Holding #8] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F7] This stock option is exercisable in three equal annual installments commencing February 25, 2023, and the next two installments on February 25, 2024 and February 25, 2025, subject to the applicable award agreement. [Holding #9] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F8] This stock option is exercisable in three equal annual installments commencing February 24, 2024, and the next two installments on February 24, 2025 and February 24, 2026, subject to the applicable award agreement. [Holding #10] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F9] This stock option is exercisable in three equal annual installments commencing March 6, 2024, and the next two installments on March 6, 2025 and March 6, 2026, subject to the applicable award agreement [Holding #11] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F10] The stock option is exercisable in three equal annual installments commencing February 27, 2025, and the next two installments on February 27, 2026 and February 27, 2027, subject to the applicable award agreement [Holding #12] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F11] The stock option is exercisable in three equal annual installments commencing March 4, 2026, and the next two installments on March 4, 2027 and March 4, 2028, subject to the applicable award agreement. [Holding #13] Security: Stock Option (Right to Buy) Ownership: D (Direct) [Holding #14] Security: Stock Option (Right to Buy) Ownership: D (Direct) Footnotes: [F12] 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. --- Footnotes (Complete Index) --- F1: 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. F10: The stock option is exercisable in three equal annual installments commencing February 27, 2025, and the next two installments on February 27, 2026 and February 27, 2027, subject to the applicable award agreement F11: The stock option is exercisable in three equal annual installments commencing March 4, 2026, and the next two installments on March 4, 2027 and March 4, 2028, subject to the applicable award agreement. F12: 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. F2: This stock option is exercisable in three equal annual installments commencing December 28, 2018, and the next two installments on December 28, 2019 and December 28, 2020, subject to the applicable award agreement. F3: This stock option is exercisable in three equal annual installments commencing May 11, 2019, and the next two installments on May 11, 2020 and May 11, 2021, subject to the applicable award agreement. F4: This stock option is exercisable in three equal annual installments commencing February 28, 2020, and the next two installments on February 28, 2021 and February 28, 2022, subject to the applicable award agreement. F5: This stock option is exercisable in three equal annual installments commencing February 27, 2021, and the next two installments on February 27, 2022 and February 27, 2023, subject to the applicable award agreement. F6: This stock option is exercisable in three equal annual installments commencing February 26, 2022, and the next two installments on February 26, 2023 and February 26, 2024, subject to the applicable award agreement. F7: This stock option is exercisable in three equal annual installments commencing February 25, 2023, and the next two installments on February 25, 2024 and February 25, 2025, subject to the applicable award agreement. F8: This stock option is exercisable in three equal annual installments commencing February 24, 2024, and the next two installments on February 24, 2025 and February 24, 2026, subject to the applicable award agreement. F9: This stock option is exercisable in three equal annual installments commencing March 6, 2024, and the next two installments on March 6, 2025 and March 6, 2026, subject to the applicable award agreement --- Signature --- /s/ /s/ Jerome Halgan (2026-09-14)