X0306 4 2013-02-13 0 0001171500 PLATINUM UNDERWRITERS HOLDINGS LTD PTP 0001241508 PRICE MICHAEL D PLATINUM UNDERWRITERS HOLDINGS, LTD. 69 PITTS BAY ROAD, 2ND FLOOR PEMBROKE D0 HM 08 BERMUDA 1 1 0 0 President and CEO Common Shares 2013-02-13 4 A 0 3130 0.00 A 245548 D These common shares represent the payment of the first half of an award granted on February 14, 2012 under the Amended and Restated Executive Incentive Plan of Platinum Underwriters Holdings, Ltd. for the 2012-2013 performance cycle. /s/ Christina M. Parker, Attorney-in-Fact 2013-02-15