IRA RENNERT

$3

BILLION  SELF-MADE SCORE: * SOURCE: INVESTMENTS AGE: 85 RESIDENCE: NEW YORK CITY PHILANTHROPY SCORE:

A Brooklyn native and former credit analyst, he amassed a fortune dealing in junk bonds in the 1980s and 1990s. Today his Renco Group, an industrial empire, has estimated revenues of $5 billion. Rennert is enmeshed in a legal battle with Ron Perelman (No. 63) over ownership stakes in Humvee maker AM General.