Board Thread:Questions and Answers/@comment-10797017-20130627100621/@comment-11051098-20130808141630

It's true that Kenpachi doesn't kill off opponents who can't fight back. But Nnoitra got back up after Kenpachi refused to kill him, and almost cut him in half with Kendô. And when the fight was over, Nnoitra lied on the ground with a visible massive blood loss.

I think everything points at Nnoitra being dead. Besides, Kubo himself have confirmed that only Harribel and Grimmjow are alive, of the Espada.

Nothing's to say that he doesn't change his mind during this arc, though. I would love to see Nnoitra again, rampaging in blood lust against a bunch of Stern Ritters and killing some. But it was heavily implied that he died, and I think he is dead.