Clay B. Lifflander, a hedge fund manager who in 2008 muscled his way onto the board of Unisys Corp. in an attempt to boost its stock price, resigned his board seat Tuesday, Unisys said in a regulatory filing.

Lifflander's company, MMI Investments L.P., owned as much as 9.1 percent of the Blue Bell company, or 32.3 million shares.

The New York investors unsuccessfully pushed Unisys to spin off its profitable government-contract business.

As of Sept. 30, MMI held 750,000 shares of Unisys stock.

Unisys shares were up 22 cents to $25.35 early this afternoon.    - Harold Brubaker