I think they already sold it but I do not know what they really did of course, most likely they have still an amount in their cold storage and sold a part too to make some good money.
Well I think that was sold too. Because think about after the incident the price decrease rapidly and after for some weeks the price is increasing it again. I guess that is because the demand of bitcoin increased as the hacker sold it already and it is in the market already that helped the price to recover but not for bitfinex.