X0306 4 2019-05-02 0 0000947484 ARCH CAPITAL GROUP LTD. ACGL 0001286007 GRANDISSON MARC C/O ARCH CAPITAL GROUP LTD. WATERLOO HOUSE, 100 PITTS BAY ROAD PEMBROKE D0 HM 08 BERMUDA 0 1 0 0 President & CEO Common Shares, $.0011 par value per share 2019-05-02 4 M 0 68400 6.431 A 1900536 I Owned with spouse Common Shares, $.0011 par value per share 2019-05-02 4 F 0 12992 33.86 D 1887544 I Owned with spouse Common Shares, $0011 par value per share 2019-05-06 4 S 0 55408 33.8629 D 1832136 I Owned with spouse Common Shares, $.0011 par value per share 115487 D Common Shares, $.0011 par value per share 1980 I By spouse Share Appreciation Right 6.431 2019-05-02 4 M 0 68400 0 D 2019-05-06 Common Shares, $.0011 par value per share 68400 0 D The share appreciation right became exercisable in three equal annual installments, with the first installment becoming exercisable on May 6, 2010 and the next two installments on May 6, 2011 and May 6, 2012, subject to the applicable award agreement. In connection with the exercise of the share appreciation rights award described in Table II, 12,992 common shares were disposed of in satisfaction of the exercise price. The reporting person received a net issuance of 55,408 common shares. Represents a weighted average sales price; the sales prices range from $33.85 to $33.91. Upon request, the full sales information regarding the number of shares sold at each price increment will be provided to the Commission or to the security holder of the issuer. /s/ Marc Grandisson 2019-05-06