Top executives of Fortress Investment Group (nyse: FIG - news - people ) also showed up in February to ring the opening bell at their debut.

FORBES: Waiting For Blackstone's Comeback

Then there are the IPOs by buyout firms themselves, a trend that started this spring with Fortress Investment Group (nyse: FIG - news - people ) but which picked up a lot of steam when Blackstone floated 10% of its management company in June.

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