X0306 4 2015-12-31 0 0001061630 BLACKSTONE MORTGAGE TRUST, INC. BXMT 0001203060 DOBROWSKI THOMAS E 117 YORK AVENUE SPRING LAKE NJ 07762 1 0 0 0 Class A Common Stock 2015-12-31 4 A 0 673 A 32775 D Represents an award of Class A Common Stock Units in lieu of retainer and meeting fees that convert to shares of Class A Common Stock on a one-for-one basis as determined at the time of the grant. The number of shares of Class A Common Stock subject to the award was calculated by dividing $18,750 in retainer and meeting fees by the average adjusted closing price for the fourth quarter of 2015. /s/ Anthony F. Marone, Jr., Attorney-In-Fact 2016-01-04