• ZA/UM itself, or it's shambling corpse.

• Red Info. The company Kurvitz and Rostov founded after they left ZA/UM, funded by Netease. Unfortunately we don't know much about what they are doing, other than that they have a project. Understandably the legal battle for the rights of Disco Elysium probably came first.

• Longdue. Unfortunately we know the least about this studio, just some concept art and some PR speak.

• Dark Math. This studio has a trailer for a game that's um... a little familiar, it's also associated with Kaur Kender who was one of the people involved in the shenanigans that went down at ZA/UM. Article

• and now Summer Eternal, who don't have a trailer or proof of concept or pretty much anything except a manifesto (and are therefore the true inheritors of the crown, imo). That said, they're explicitly set up as a worker's co-op with a structure that's designed to prevent a hostile takeover, so it seems some hard lessons have been learnt

The scuttlebutt is that ZA/UM's non-compete clause for their ex-staff expired today, which is the reason for all these announcements, but that's speculation that can't be corroborated so take it with a pinch of salt.