Billionaire Bill Ackman has never been reluctant to blaze trails. He became the first hedge fund manager to get directly involved in a hostile takeover when backed Valeant Pharmaceuticals' $50 billion bid for Allergan. And Ackman is leading a costly and very public crusade against Herbalife, which he says is little more than a pyramid scheme. Now he's considering listing his offshore fund in London, a move that would free him from the whims of wimpy investors. But potential shareholders should beware. Ackman's recent record is mixed, at best. And his brand of activist investing will never be as big across the pond as it is in the U.S.

More from Video

Replay: Jim Cramer on the Markets, 10-Year Yield, Oil Prices and Foot Locker

Replay: Jim Cramer on the Markets, 10-Year Yield, Oil Prices and Foot Locker

Video: You Could Live in a Ritz-Carlton or St. Regis Home

Video: You Could Live in a Ritz-Carlton or St. Regis Home

KPMG Chair & CEO: There's No One-Size-Fits All Approach to Diversity

KPMG Chair & CEO: There's No One-Size-Fits All Approach to Diversity

Best Buy's Billionaire Founder: We Were 'Late to the Game' in Online Shopping

Best Buy's Billionaire Founder: We Were 'Late to the Game' in Online Shopping

Jim Cramer: Intuit Had a Fantastic Quarter

Jim Cramer: Intuit Had a Fantastic Quarter