X0304 4 2011-09-29 0 0001364742 BlackRock Inc. BLK 0001438849 Petach Ann Marie BLACKROCK, INC. 55 EAST 52ND STREET NEW YORK NY 10055 0 1 0 0 CFO and Senior MD Shares of Common Stock (par value $0.01 per share) 2011-09-29 4 F 0 3869 148.55 D 29832 D Shares of Common Stock (par value $0.01 per share) 2011-09-29 4 F 0 1919 148.55 D 27913 D Represents the withholding by BlackRock of Common Stock to satisfy tax obligation on the vesting of Restricted Stock Units granted in connection with a long-term incentive award to the Reporting Person in January 2007 under the Amended and Restated BlackRock, Inc. 1999 Stock Award and Incentive Plan. Includes (i) 1,205 Restricted Stock Units vesting on 1/31/12, (ii) 1,356 shares of Restricted Stock vesting in equal installments on 1/31/12 and 1/31/13, (iii) 2,000 shares of Restricted Stock vesting on 1/31/12, (iv) 3,991 shares of Restricted Stock vesting in installments on 1/31/12, 1/31/13 and 1/31/14 and (v) 6,549 shares of Restricted Stock vesting on 1/31/14. 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 Ann Marie Petach 2011-09-30