Linear Train Industries is an international industrial company that maintain the orbital elevator's transportation systems. The face of the company has always been about transportation technology, but the company is unofficially a resource of Celestial Being. The linear trains of the 3 orbital elevators transport resources and Gundams in space. Whenever Virtue and/or Kyrios enters Earth, their only way of returning to Ptolemy is through the linear trains, this applies to Exia and Dynames as well.
The president of Linear Trains Industries is Laguna Harvey, a Celestial Being agent. He would later betray Celestial Being, using company resources to secretly develop his own GN Technology to create the GNW Gundam Throne series.
History
Joining Celestial Being
Laguna's affiliation with Celestial Being is an untold tale. The fact his company provides resources to Celestial Being and related to Aeolia Schenberg's orbital elevator plans suggest his family or at least himself was part of of the secret organization for a very long time. He had Linear Train Industries assist Celestial Being sneaking in materials, equipment, Gundams, and operatives in between Earth, orbital elevators, and various Lagrange points.
Personal Agenda
Much of Laguna's intentions are unknown. It's speculated he wanted more than just wealth, he wanted political influence and/or power. Ribbons Almark and Alejandro Corner secretly was in contact with him to start developing GN-tech based on stolen CB data. The Gundam Thrones Units dispatched in Episode 16 to aid the four Gundam Meisters in the Taklamakan Desert.
Creating Team Trinity
The full history of the Trinity siblings is unclear, however they have been secretly active before the events of A.D. 2307. According to the novelization, the Trinitys are actually the children of Ribbons Almark. Using his own genetic material, he used cloning facilities to give birth to his personal Meister troupe. For unexplained reasons, the Trinitys are fully aware of their creation, but not of their "father". After activation, they were sent to Laguna Harvey, given a spaceship, the Throne Gundams, and various secrets pertaining Celestial Being. The Trinitys began their own interventions and CB stayed away. Laguna Harvey directed the Trinitys giving them missions, information, and resupply.
Destroying Celestial Being
Using the data from the Throne Gundams Linear Train Industries created the GNX-509T Throne Varanus. Alejandro invited Ms. Deborah to a secret establishment, requesting her to be the test pilot of the Throne Varanus. Throne Varanus is the prototype for the upcoming GNX-603T GN-X series. Although the full scope of his intentions are unknown, it appears he's been attempting to gain favor and greater influence over the world by offering GN-Tech to the world. It's unclear why would he destroy his own group, but exterminating the Trinity's seem to be part of his plans. He unleashed the Thrones to cause chaos and then give the world GN-X's to destroy them. Laguna is manipulated by the Innovators into building and selling thirty GN Drive-equipped GN-X mobile suits to the three power blocs.