The Securities and Exchanges Commission in the US is investigating whether former HP CEO Mark Hurd passed on information about the technology giant's acquisition of EDS before it was completed.
According to a Wall Street Journal report this is part of a broad inquiry into Hurd's departure from HP in acrimonious circumstances.
Hurd left his position in August after allegations of sexual harassment and false expense claims.
HP acquired EDS in 2008 for more than £7bn.
According to Wall Street Journal sources the SEC is checking whether Hurd passed information to a former HP event hostess in 2008, before the deal was announced.
Hurd is now co-president at Oracle.