13 Joseph DiMenna
Zweig-DiMenna Partners
$450 million
Joe DiMenna, 49, has been on a roll. The manager of New York–based Zweig-DiMenna has racked up double-digit returns for each of the past five years, culminating in last year’s breathtaking 80 percent net return. DiMenna, a bottom-up specialist, benefited on the long side from positions in basic materials, energy, communications and media, and technology, and on the short side in financial services, homebuilding and other consumer-oriented sectors.