ITEM 8.01 Other Events.

From October 1, 2012 through December 31, 2012, Arch Capital Group Ltd. ("ACGL") repurchased 3,924,306 common shares for an aggregate purchase price of $172.1 million. At December 31, 2012, $769.9 million of share repurchases were available under ACGL's share repurchase program. ACGL continues to repurchase common shares under the repurchase program, including under its previously adopted Rule 10b5-1 plan. Repurchases under the program may be effected from time to time in open market or privately negotiated transactions. The timing and amount of the repurchase transactions under this program will depend on a variety of factors, including market conditions and corporate and regulatory considerations.

In addition, and as previously reported, ACGL issued special off-cycle grants of share-based awards to certain key employees of ACGL and its subsidiaries in September and November 2012. These awards will cliff vest on the fifth anniversary of the grant date. These awards consisted of (1) an aggregate of 999,930 restricted common shares and restricted common share units of ACGL and
(2) share appreciation rights and stock options covering an aggregate of 999,930 common shares of ACGL.

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