Tonheld Mining Corporation was a mining company that held exclusive rights to mine the asteroid fields of the Halmad system during the final years of the Galactic Republic. The company's headquarters was located on the asteroid A3 at Site A3. After efficiently hollowing out the asteroids around 36 ABY, the company abandoned the asteroid field. Many years later, Wraith Squadron used Site A3 as a staging point for their base when posing as the Hawk-bats.