ACGL insider transactions

Director Posner Brian S sold $58,980 worth of Depositary Shares (3,000 units at $19.66), closing all direct ownership in the company (SEC Form 4)

Director Posner Brian S sold $34,283 worth of Depositary Shares (2,000 units at $17.14), closing all direct ownership in the company (SEC Form 4)

Director Triplett Neal F was granted 3,398 shares, increasing direct ownership by 74% to 8,013 units (SEC Form 4)

Director Posner Brian S was granted 2,071 shares, increasing direct ownership by 2% to 122,175 units (SEC Form 4)

Director Moczarski Alexander S was granted 2,071 shares, increasing direct ownership by 105% to 4,037 units (SEC Form 4)

Director Mallesch Eileen A was granted 2,071 shares, increasing direct ownership by 18% to 13,802 units (SEC Form 4)

Director Kilcoyne Moira A. was granted 3,398 shares, increasing direct ownership by 10% to 35,842 units (SEC Form 4)

Director Houston Daniel Joseph was granted 3,398 shares, increasing direct ownership by 34% to 13,313 units (SEC Form 4)

Director Goodman Laurie was granted 2,071 shares, increasing direct ownership by 6% to 37,573 units (SEC Form 4)

Director Ebong Francis was granted 2,071 shares, increasing direct ownership by 19% to 12,878 units (SEC Form 4)

Director Bunce John L Jr was granted 3,398 shares, increasing direct ownership by 0.22% to 1,563,067 units (SEC Form 4)

Chair Pasquesi John M was granted 5,256 shares (SEC Form 4)

Director Houston Daniel Joseph bought $498,650 worth of shares (5,300 units at $94.08), increasing direct ownership by 115% to 9,915 units (SEC Form 4)

Director Posner Brian S sold $51,345 worth of Depositary Shares (3,000 units at $17.11), decreasing direct ownership by 60% to 2,000 units (SEC Form 4)

President, Arch Capital Group Gansberg David exercised 10,770 shares at a strike of $18.90 and sold $569,266 worth of shares (5,907 units at $96.37), increasing direct ownership by 1% to 336,559 units (SEC Form 4)

CEO Papadopoulo Nicolas exercised 21,930 shares at a strike of $18.90 and sold $2,112,063 worth of shares (21,930 units at $96.31) (SEC Form 4)

President, Arch Capital Group Rajeh Maamoun gifted 40,600 shares and received a gift of 40,600 shares, decreasing direct ownership by 9% to 428,378 units (SEC Form 4)

President, Arch Capital Group Rajeh Maamoun was granted 6,843 shares, increasing direct ownership by 1% to 468,978 units (SEC Form 4)

Chief Investment Officer Todd Christine was granted 3,981 shares, increasing direct ownership by 4% to 100,230 units (SEC Form 4)

Officer of Subsidiary Petrillo Louis T was granted 2,889 shares and covered exercise/tax liability with 8,030 shares, decreasing direct ownership by 3% to 151,490 units (SEC Form 4)

CFO and Treasurer Morin Francois was granted 5,329 shares, increasing direct ownership by 2% to 298,788 units (SEC Form 4)

President, Arch Capital Group Gansberg David was granted 6,843 shares and covered exercise/tax liability with 12,519 shares, decreasing direct ownership by 2% to 331,696 units (SEC Form 4)

CEO Papadopoulo Nicolas was granted 21,318 shares, increasing direct ownership by 3% to 871,594 units (SEC Form 4)

Officer of Subsidiary Petrillo Louis T covered exercise/tax liability with 312 shares, decreasing direct ownership by 0.20% to 156,631 units (SEC Form 4)

President, Arch Capital Group Gansberg David covered exercise/tax liability with 553 shares, decreasing direct ownership by 0.16% to 337,372 units (SEC Form 4)

Chief Investment Officer Todd Christine was granted 25,046 shares, increasing direct ownership by 35% to 96,249 units (SEC Form 4)

CFO and Treasurer Morin Francois was granted 27,432 shares, increasing direct ownership by 10% to 293,459 units (SEC Form 4)

President, Arch Capital Group Rajeh Maamoun was granted 28,546 shares, increasing direct ownership by 7% to 462,135 units (SEC Form 4)

President, Arch Capital Group Gansberg David was granted 28,546 shares and covered exercise/tax liability with 509 shares, increasing direct ownership by 9% to 337,925 units (SEC Form 4)

Officer of Subsidiary Petrillo Louis T covered exercise/tax liability with 412 shares and was granted 17,136 shares, increasing direct ownership by 12% to 156,943 units (SEC Form 4)

CEO Papadopoulo Nicolas was granted 46,674 shares, increasing direct ownership by 6% to 850,276 units (SEC Form 4)

President, Arch Capital Group Rajeh Maamoun exercised 47,430 shares at a strike of $27.12 and sold $4,558,858 worth of shares (47,430 units at $96.12) (SEC Form 4)

CHAIR Pasquesi John M gifted 53,000 shares and sold $19,970,731 worth of shares (212,666 units at $93.91) (SEC Form 4)

OFFICER OF SUBSIDIARY Petrillo Louis T gifted 42 shares and received a gift of 14 shares, decreasing direct ownership by 0.03% to 139,971 units (SEC Form 4)

SEC Form 4 filed by Arch Capital Group Ltd.

President, Arch Capital Group Gansberg David covered exercise/tax liability with 9,494 shares, decreasing direct ownership by 3% to 309,888 units (SEC Form 4)

Director Vollaro John D gifted 2,192 shares (SEC Form 4)

PRESIDENT, ARCH CAPITAL GROUP Rajeh Maamoun sold $941,464 worth of shares (10,000 units at $94.15), decreasing direct ownership by 2% to 433,589 units (SEC Form 4)

Director Vollaro John D gifted 194,999 shares and received a gift of 194,999 shares (SEC Form 4)

Director Posner Brian S bought $17,338 worth of Depositary Shares (1,000 units at $17.34), increasing direct ownership by 25% to 5,000 units (SEC Form 4)

EVP AND CFO Morin Francois exercised 12,630 shares at a strike of $18.90 and sold $1,194,576 worth of shares (12,630 units at $94.58) (SEC Form 4)

CHAIR Pasquesi John M sold $9,329,000 worth of shares (99,056 units at $94.18) (SEC Form 4)

OFFICER OF SUBSIDIARY Petrillo Louis T exercised 16,650 shares at a strike of $18.90, sold $1,573,944 worth of shares (16,650 units at $94.53), gifted 10 shares and received a gift of 10 shares, decreasing direct ownership by 0.01% to 140,013 units (SEC Form 4)

Director Goodman Laurie was granted 1,564 shares, increasing direct ownership by 5% to 35,502 units (SEC Form 4)

Director Triplett Neal F was granted 2,912 shares, increasing direct ownership by 171% to 4,615 units (SEC Form 4)

Director Posner Brian S was granted 1,564 shares, increasing direct ownership by 1% to 120,104 units (SEC Form 4)

CHAIR Pasquesi John M was granted 4,260 shares (SEC Form 4)

Director Moczarski Alexander S was granted 1,564 shares, increasing direct ownership by 389% to 1,966 units (SEC Form 4)

Director Mallesch Eileen A was granted 1,564 shares, increasing direct ownership by 15% to 11,731 units (SEC Form 4)

Director Kilcoyne Moira A. was granted 2,912 shares, increasing direct ownership by 10% to 32,444 units (SEC Form 4)

Director Houston Daniel Joseph was granted 2,912 shares, increasing direct ownership by 171% to 4,615 units (SEC Form 4)

Director Ebong Francis was granted 1,564 shares, increasing direct ownership by 17% to 10,807 units (SEC Form 4)

Director Bunce John L Jr was granted 2,912 shares, increasing direct ownership by 0.19% to 1,559,669 units (SEC Form 4)

Amendment: CEO Papadopoulo Nicolas exercised 9,213 shares at a strike of $15.84 and covered exercise/tax liability with 1,577 shares, increasing direct ownership by 0.96% to 803,354 units (SEC Form 4)

CEO Papadopoulo Nicolas exercised 9,213 shares at a strike of $15.84, covered exercise/tax liability with 1,577 shares and sold $706,177 worth of shares (7,636 units at $92.48) (SEC Form 4)

OFFICER OF SUBSIDIARY Petrillo Louis T was granted 3,042 shares, covered exercise/tax liability with 9,916 shares, exercised 21,000 shares at a strike of $15.84 and sold $1,927,335 worth of shares (21,000 units at $91.78), decreasing direct ownership by 5% to 140,023 units (SEC Form 4)

PRESIDENT, ARCH CAPITAL GROUP Rajeh Maamoun was granted 7,484 shares, increasing direct ownership by 2% to 443,341 units (SEC Form 4)

CHIEF INVESTMENT OFFICER Todd Christine was granted 3,744 shares, increasing direct ownership by 6% to 70,955 units (SEC Form 4)

EVP AND CFO Morin Francois was granted 4,789 shares, increasing direct ownership by 2% to 274,681 units (SEC Form 4)

President, Arch Capital Group Gansberg David was granted 7,484 shares and covered exercise/tax liability with 13,873 shares, decreasing direct ownership by 2% to 319,382 units (SEC Form 4)