BusinessweekConquests and Setbacks of a Corporate AgitatorFacebookXLinkedInEmailLinkGiftExpandBloomberg; Getty ImagesFacebookXLinkedInEmailLinkGiftGift this articleContact us:Provide news feedback or report an errorConfidential tip?Send a tip to our reportersSite feedback:Take our SurveyNew WindowFacebookXLinkedInEmailLinkGiftBy Roben FarzadAugust 25, 2011 at 9:43 PM UTCBookmarkSaveLock This article is for subscribers only.This article is part of the August 29, 2011 issue of businessweek.Chevron RightHis notable investment hits and misses.