I was just wandering: how many studios does Bethesda Game StudioS have? If they had only one studio they would call their-self/themselves Bethesda Game Studio, or not?

https://en.wikipedia.org/wiki/Bethesda_Softworks (the publisher) owns several other developers like ID and Arkane, but http://bgs.gamesas.com/ is one entity, without a little over 100 employees. That's why they tend to work on a single game at a time, with a bit of overlap between the end of one and the start of the next.

A minor correction....Bethesda Softworks and seven gaming studios are all owned by Zenimax Media. Go https://en.wikipedia.org/wiki/ZeniMax_Media and check the title panel for a list of the subsidiaries.

https://en.wikipedia.org/wiki/Bethesda_Softworks

So actually the list is:

Bethesda Game Studios
Zenimax Online Studios
id Software
Arkane Studios
MachineGames
Tango Gameworks
BattleCry Studios

There is actually aswell another list on the Bethesda site:

http://gamesas.com/en-gb/studios

I read aswell an interview, that Bethesda was in a time of getting all studios running together in a good way, they archived now. Because of this, they announced to produce more games in the future. About 3-4 in a year.

http://www.technobuffalo.com/2015/08/21/bethesda-wants-to-release-three-or-four-big-titles-a-year/

Let's hope, that the quality of the games won't decrease then. But most likely, each studio will work on another game then.

Edit: Yes, the name is ZeniMax Media. There is aswell a site with the Studios there. Seems to be the same one.

https://www.zenimax.com/studios

Btw. Thats intresting:

Owner Providence Equity Partners (25%)
ProSiebenSat.1 Media (9%)

Thats one of the larger german TV companies. Ouch, that will lead to a lot of advertising for Fallout 4 here.