A company at Market Street 582. Founded by Marshall Alexander it has many successful diversified companies tied to the development of Mars. Having got the early rights to silicon mining, they own almost everything on the planet.
The building headquarters is described as the biggest building in San Francisco. The inside has a large spacious interior, but combined with an extremely paranoid security system loadout.
In Martian Memorandium, Tex first encounters the secretary Rhonda Foxworth. He can access Alexander's office, as well as the bathroom behind the secretary, where he can recover her earring.