It led to the ouster earlier this year of Maurice R. Greenberg as chief executive of the American International Group , a company that he ran for 38 years , and has drawn investigative scrutiny of insurance units of Berkshire Hathaway , the holding company of Warren E. Buffett .
American International Group
Maurice R. Greenberg
/business/company/major_shareholders
Maurice R. Greenberg
American International Group
/business/company_shareholder/major_shareholder_of
PERSON
Maurice R. Greenberg
ORGANIZATION
American International Group
ORGANIZATION
Berkshire Hathaway