Frank I think I actually have little bit of a answer. You likely know all this
L1
QUOTE (Target: Wastelands, Wake of the Comet)
Treffpunkt Raumhafen is a Proteus AG space station, located at L1 (an unstable Lagrange point, between Earth and the Moon) in the Earth-Moon system. The name roughly translates from German as "Meeting place space port".
The station was kept secret while under construction. Proteus AG made a very public bid for one of the rewards in Dunkelzahn's Will, and while everyone was concentrating on that, were quietly sending up construction materials from their Devil's Island Arcology.
The station became fully operational in early 2062. It is used for general zero-g research and development, as well as black research projects. Space on the station is also leased to AG Chemie Europa, Transys Neuronet and ECC Eurotronics.
L3
QUOTE (Target: Wastelands (p. 84))
Helios is the only known manned space station beyond lunar orbit. It is owned by Ares Macrotechnology, and sits at the "L3" solar LaGrange point directly opposite of the Earth in solar orbit. The purpose of the space station is unknown (although it is suspected to be a launch platform for future deep space missions and a deep space observatory), and Ares has kept the project under wraps.
QUOTE (Target: Wastelands (p. 84))
Nerva is a space station at the L3 LaGrange Point. Harris-3M built it before 2027, using the station for zero-gravity research, though some believe Harris was conducting black projects onboard. The Crash Virus of 2029 shut down Nerva, killing all aboard. When Fuchi purchased Harris-3M's assets, the megacorporation chose to not to salvage Nerva. So the station is currently an inoperational hulk.
L5
QUOTE (Target: Wastelands (p. 82))
The Junkyard is the nickname of Angel Station, a space station at the L5 LaGrange Point. Harris-3M built Angel Station before 2027, using it for microtronics and material engineering. The Crash Virus of 2029 shut down Angel Station, killing all aboard. When Fuchi purchased Harris-3M's assets, the megacorporation chose to not to salvage Angel Station. Because of the hulk's location at a LaGrange Point, it tends to attract space junk. Yamatetsu intends to construct a new station at the L5 LaGrange Point, but Novatech, as successor in interest to Fuchi, claim that the area belongs to it. The Corporate Court is deciding the dispute.