Obsidian, the company is called Obsidian Entertainment.
That said, the folks at Obsidian (especially the creators of the original Fallout and New Vegas) have said they have no interest in doing a Fallout game. Tim Cain specifically mentioned during the Outer Worlds Q&A that the Fallout ship had sailed.
I think that Obsidian is better off doing non-Fallout things (and personally Outer Worlds is so much "Fallout Alternate Space Timeline" already that I'd much rather see them continue with Outer Worlds as the closest thing they ever again do to Fallout). It's just interesting to point out how many of the "Fallout birds" will come home to roost at Microsoft.