Federal prosecutors in Manhattan have opened an investigation into whether Maurice R. Greenberg , the former chairman and chief executive of the insurance giant American International Group , orchestrated an effort to manipulate the company 's stock price in his final weeks as chief , people officially briefed on the inquiry said yesterday .
Maurice R. Greenberg /business/company_shareholder/major_shareholder_of American International Group
American International Group /business/company/major_shareholders Maurice R. Greenberg
NNP NNS IN NNP VBP VBN DT NN IN IN NNP NNP NNP , DT JJ NN CC JJ NN IN DT NN JJ NNP NNP NNP , VBD DT NN TO VB DT NN POS NN NN IN PRP$ JJ NNS IN NN , NNS RB VBN IN DT NN VBD NN .
Maurice R. Greenberg
PERSON
American International Group
ORGANIZATION
/business/company_shareholder/major_shareholder_of
American International Group
ORGANIZATION
Maurice R. Greenberg
PERSON
/business/company/major_shareholders