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This grant was approved by the Management Development and Compensation Committee on January 10, 2018.  Restricted Stock Units vest in equal installments on 1/31/19, 1/31/20 and 1/31/21."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes Common Stock, Restricted Stock that will vest over a period of 1 to 3 years and Restricted Stock Units that will vest in whole or in part only on the satisfaction of one or more previously-disclosed Common Stock price targets. Restricted Stock and Restricted Stock Units are payable solely by delivery of an equal number of shares of Common Stock."}],"balance_after":282278.6,"source":{"system":"sec-edgar","filing":"0001127602-18-002101","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1059246/000112760218002101/form4.xml","form_type":"4"}},{"id":4251295,"issuer":{"id":12961,"kind":"organization","name":"BlackRock Inc.","symbol":"BLK"},"owners":[{"id":14737,"kind":"person","name":"KAPITO ROBERT","position":1,"cik":"0001059246","reported_name":"KAPITO ROBERT","relationship":{"director":true,"officer":true,"officer_title":"President"}}],"security":"Shares Of Common Stock (par Value $0.01 Per Share)","published_at":"2017-07-26T20:16:09.000Z","date":"2017-07-24","kind":"gift","acquired":false,"shares":17360,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes Common Stock and Restricted Stock Units that will vest over a period of 1 to 3 years. Each Restricted Stock Unit is payable solely by delivery of an equal number of shares of Common Stock."}],"balance_after":276074.6,"source":{"system":"sec-edgar","filing":"0001127602-17-024163","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1059246/000112760217024163/form4.xml","form_type":"4"}},{"id":4300272,"issuer":{"id":12961,"kind":"organization","name":"BlackRock Inc.","symbol":"BLK"},"owners":[{"id":14737,"kind":"person","name":"KAPITO ROBERT","position":1,"cik":"0001059246","reported_name":"KAPITO ROBERT","relationship":{"director":true,"officer":true,"officer_title":"President"}}],"security":"Shares Of Common Stock (par Value $0.01 Per Share)","published_at":"2017-05-31T21:10:03.000Z","date":"2017-05-30","kind":"gift","acquired":false,"shares":3000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes Common Stock and Restricted Stock Units that will vest over a period of 1 to 3 years. Each Restricted Stock Unit is payable solely by delivery of an equal number of shares of Common Stock."}],"balance_after":293434.6,"source":{"system":"sec-edgar","filing":"0001127602-17-019872","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1059246/000112760217019872/form4.xml","form_type":"4"}},{"id":4471563,"issuer":{"id":12961,"kind":"organization","name":"BlackRock Inc.","symbol":"BLK"},"owners":[{"id":14737,"kind":"person","name":"KAPITO ROBERT","position":1,"cik":"0001059246","reported_name":"KAPITO ROBERT","relationship":{"director":true,"officer":true,"officer_title":"President"}}],"security":"Shares Of Common Stock (par Value $0.01 Per Share)","published_at":"2017-02-02T21:48:17.000Z","date":"2017-01-31","kind":"tax_withholding","acquired":false,"shares":23669,"price":375.18,"value":8880135.42,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes Common Stock, Restricted Stock that will vest over a period of 1 to 3 years and Restricted Stock Units that will vest in whole or in part only on the satisfaction of one or more previously-disclosed Common Stock price targets. Restricted Stock and Restricted Stock Units are payable solely by delivery of an equal number of shares of Common Stock."}],"balance_after":296434.6,"source":{"system":"sec-edgar","filing":"0001127602-17-003611","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1059246/000112760217003611/form4.xml","form_type":"4"}},{"id":4486912,"issuer":{"id":12961,"kind":"organization","name":"BlackRock Inc.","symbol":"BLK"},"owners":[{"id":14737,"kind":"person","name":"KAPITO ROBERT","position":1,"cik":"0001059246","reported_name":"KAPITO ROBERT","relationship":{"director":true,"officer":true,"officer_title":"President"}}],"security":"Shares Of Common Stock (par Value $0.01 Per Share)","published_at":"2017-01-19T21:22:37.000Z","date":"2017-01-17","kind":"grant","acquired":true,"shares":8552,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects an award value of $3,209,000 converted to a number of Restricted Stock Units by dividing the approved award value by $375.22, which was the average of the high and low price per share of Common Stock on January 17, 2017.  This grant was approved by the Management Development and Compensation Committee on January 11, 2017.  Restricted Stock Units vest in equal installments on 1/31/18, 1/31/19 and 1/31/20."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes Common Stock, Restricted Stock Units that will vest over a period of 1 to 3 years and Restricted Stock Units that will vest in whole or in part only on the satisfaction of one or more previously-disclosed Common Stock price targets. Each Restricted Stock Unit is payable solely by delivery of an equal number of shares of Common Stock."}],"balance_after":320103.6,"source":{"system":"sec-edgar","filing":"0001127602-17-002065","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1059246/000112760217002065/form4.xml","form_type":"4"}}]}