SAC's biggest hedge funds, called SAC Capital Management LP and SAC Capital International Ltd.

WSJ: SAC Sees Investors Pulling Out $3.5 Billion

Tortoise's biggest single holding is Houston's Kinder Morgan Energy Partners LP (49, KMP) .

FORBES

"The carriers have been saying in a gentle way to RIM, 'Guys, you won't be doing this, '" said Robin Dua, chief executive of EnStream LP, a firm set up by Canada's three biggest wireless companies to implement their mobile-payments strategy.

WSJ: RIM, Carriers Fight Over Digital Wallet