Ackman's Pershing Square Discloses 1.92M Share Stake in Legg Mason (LM)

William Ackman's Pershing Square Capital disclosed they held a 1.92 million share stake in Legg Mason (NYSE: LM) at the quarter ended March 31, 2007. Pershing Square disclosed the stake today after confidential treatment, which concealed the stake, expired.

William Ackman is known as an activist investor.