I think it does, but I'm not 100% sure. He never showed it, there were no hints, and awakening it in his 50s is a little strange. Also, it looks like Oda tends to give really powerful CoC only to pirates, with the exception of Garp, who is a pirate in everything but name. So I would not be surprised to see Akainu use CoC, but so far he has looked like a DF merchant.