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| Carl Icahn | Locksmith Capital | Sandell Asset Managament |
| Chapman Capital | Loeb Arbitrage | Shamrock Activist Value Fund |
| Clinton Group | MFP Investors | Steel Partners |
| Costa Brava | MMI Investments | Steel Partners (Japan) |
| Crescendo Partners | Monarch Activist Fund | Strategic Turnaround Partners |
| Dalton Investments (Japan) | Nanes Balkany Partners | Sun Capital |
| Discovery Equity Partners | New Mountain Capital | TCI |
| Elliott Associates | Newcastle Capital | Third Point |
| Firebrand Capital | Nierenberg Investment | Trian Fund |
| FrontFour Capital | Obrem Capital | ValueAct Capital |
| Gamco Investors | Oliver Press Partners | Wattles Capital |
| Greenlight Capital | Owl Creek | Western Investment |
| Harbinger Capital | Pershing Square Capital | Wintergreen Advisers |
| Ironfire Capital | Pirate Capital | Wynnefield Capital |
| Jana Partners | Ramius Capital |
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