Yes, MachineGames and Tango are owned by ZeniMax. They are published by Bethesda Softworks, the parent company of Bethesda Game Studios and a ZeniMax subsidiary

Yes, MachineGames and Tango are owned by ZeniMax. They are published by Bethesda Softworks, the parent company of Bethesda Game Studios and a ZeniMax subsidiary. I don't really understand the point of this faux pedantry, seeing as there is a meaning of Bethesda that fits my post.