Bioshock and Bioshock Infinite were by Irrational Games (2K Boston). Bioshock 2 was by 2K Marin.

Ken Levine shut down the studio after Infinite as they disliked the stress and scale of development - missing the days of small development teams.

That was back in 2014. Levine’s studio he set up immediately after the closure has yet to release a game but supposedly their first project, Judas, is not too far from completion (it was meant to be out this year in March but, so far, there’s no news).