It's generally assumed thee are a multitude of different companies working on various components of this program producing various things. Rivtech, Doubletech, Actem, XEDRA.
However, for the official lore, we're avoiding any specific names. At some point in the future we'd like to actually introduce a way to dynamically generate names for these companies tied to a specific world, so what might be a Rivtech item in one world might be a Doubletech property in the next. Important names might change too.
The overall lore, though, is generally unconcerned with which individual company manufactured or developed which particular weapon, so we'll be trying to avoid it. We won't be naming the president, for example, either.
XE-101 was renamed to XE-037 in the lab notes. I'll also be replacing them with/adding actual in game lab notes later on.