BlackRock , a firm that has thrived under the vibrant , independent leadership of a core of top executives , headed by Laurence D. Fink , its chief executive , will now operate under a tighter leash .
Laurence D. Fink /business/person/company BlackRock
NNP , DT NN WDT VBZ VBN IN DT JJ , JJ NN IN DT NN IN JJ NNS , VBN IN NNP NNP NNP , PRP$ JJ NN , MD RB VB IN DT JJR NN .
Laurence D. Fink
PERSON
BlackRock
ORGANIZATION
/business/person/company