Ingot is a company affiliated with the IMC. They most likely are a water treatment company, because of heavy references to the Titanfall map, Runoff, and the conveniently named location in Kings Canyon, Runoff, and Water Treatment. Ingot had originally no alliances with either of the two major factions (IMC, or Militia) but was quickly put under IMC influence early on in the frontier timeline. (likely before the Titan Wars) the water facilities are always in use of an IMC base, or IMC controlled area.
Ingot water treatment facility poster on Eden