Two Sigma, the successful quant hedge fund, is dogged by two cofounders who don't get along. Disagreements between Overdeck and Siegel only surfaced publicly for the first time last week. The disclosure was highly unusual for a hedge fund since they generally have much lighter disclosure requirements than their public counterparts, experts say, making the filing all the more notable. The firm has been known mainly as a premier quantitative hedge fund since its founding. Then when it comes to planning for the next generation of leaders to take over from hedge fund founders, the transition can be difficult.

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Persons: John Overdeck, David Siegel, Overdeck, Siegel, Mark Pickard, Jonathan Hitchon, Sarah Jacobs, Kevin Mullally, Mullally Organizations: Sigma, Street Journal, Overdeck, Wall Street, Business, University of Central Locations: New York, Manhattan's SoHo, University of Central Florida