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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1364742	Blackrock Inc.	BLK	Security Brokers, Dealers & Flotation Companies (6211)	320174431

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1059242	Bennett Golub	Blackrock, Inc. 55 East 52Nd Street New York NY 10055	Chief Risk Officer	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Shares Of Common Stock (Par Value $0.01 Per Share)	Acquisiton	2012-01-23	20,000	$37.36	258,874	No	4	M	Direct
Shares Of Common Stock (Par Value $0.01 Per Share)	Disposition	2012-01-23	20,000	$185.39	238,874	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock (Par Value $0.01 Per Share)	Employee Stock Option (right to buy)	Disposition	2012-01-23	20,000	$0.00	20,000	$37.36

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0	2006-12-31	2012-10-15	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Shares Of Common Stock (Par Value $0.01 Per Share)	56,223	Indirect	Trust for benefit of family

Footnotes

Includes 586.5889 shares of Common Stock acquired by the reporting person under the BlackRock, Inc. Employee Stock Purchase Plan. Also includes 1,307.7895 shares of Common Stock held in the BlackRock, Inc. Retirement Savings Plan.
[Footnote 1 cont.] Also includes (i) 2,326 Restricted Stock Units vesting on 1/31/12, (ii) 2,832 shares of Restricted Stock vesting in equal installments on 1/31/12 and 1/31/13, (iii) 1,715 shares of Restricted Stock vesting on 1/31/12, (iv) 5,925 shares of Restricted Stock vesting in equal installments on 1/31/12, 1/31/13 and 1/31/14, (v) 5,613 shares of Restricted Stock vesting on 1/31/14, (vi) 4,762 Restricted Stock Units vesting in installments on 1/31/13, 1/31/14 and 1/31/15 and (vii) 9,830 Restricted Stock Units awarded on 1/20/12 that will vest in whole or in part only on the satisfaction of one or more previously-disclosed Common Stock price targets, but which may not vest before 1/31/16 and will expire on 1/31/18 to the extent not then vested. Each Restricted Stock Unit is payable solely by delivery of an equal number of shares of Common Stock.
This transaction was executed in multiple trades at prices ranging from $185.06 to $185.61. The price reported represents the weighted average sale price of these trades. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the shares sold at each separate price.