X0306 4 2016-02-01 0001364742 BlackRock Inc. BLK 0001542481 Mallow Matthew J. BLACKROCK, INC. 55 EAST 52ND STREET NEW YORK NY 10055 1 General Counsel and Senior MD Common Stock 2016-02-01 4 F 0 3271 314.26 D 16568.12 D Represents the withholding by BlackRock of Common Stock to satisfy tax obligation on the vesting of the reporting person's Restricted Stock Units granted under the Second Amended and Restated BlackRock, Inc. 1999 Stock Award and Incentive Plan. Includes 300.12 shares of Common Stock acquired by the reporting person under the BlackRock, Inc. Employee Stock Purchase Plan. Also includes (i) 1,515 Restricted Stock Units vesting on 1/31/17, (ii) 2,569 Restricted Stock Units vesting in equal installments on 1/31/17 and 1/31/18, (iii) 4,221 Restricted Stock Units that will vest in equal installments on 1/31/17, 1/31/18 and 1/31/19 and (iv) 1,723 Restricted Stock Units vesting on 1/31/17. Each Restricted Stock Unit is payable solely by delivery of an equal number of shares of Common Stock. /s/ Daniel R. Waltcher as Attorney-in-Fact for Matthew J. Mallow 2016-02-03