Got Alaska Air Group, Navistar International, and Great Lakes Chemical to revoke poison pills this year. Will continue to plague management at Aetna. Last year, led dissident group that won three board seats at ICN Pharmaceuticals.DAVID WINTERS, Franklin Mutual Advisers
Along with Iridian Asset Management's David L. Cohen, soliciting proxies to elect three new directors at ICN. If they succeed, dissidents will control six of the nine board seats, and try to oust Chairman Milan Panic.RICHARD GRUBMAN, Highfields Capital
Attempted unsuccessfully to take control of Reader's Digest Association in March, 2002. But his pressure led the company to dismantle its dual-stock structure. He's unhappy with a management plan to entrench itself by using a staggered timetable to elect board members.SAMUEL WYLY, Ranger Governance
Lost proxy battle to win board seats at Computer Associates last year, but company later drafted independent directors and promised to abandon pro forma accounting. Now, wants to oust Chairman Charles Wang, CEO Sanjay Kumar, and other senior execs.