These guys do General Implanted Bionics. The name is occassionally shortened to “GIB,” and they are the largest stakeholder in biological implants.
This corporation specifically focuses on implants that feel natural and naturally integrate with the body, attempting to bring maintenance down as little as possible. Firmament Corporation implants need to be charged and typically need a power center in the form of an integrated sub-battery, but they can use electricity and in far larger bursts. Their implants also have very low failure rates, probably due to their long history of research and deployment.
Most notably, one of the very few corporations to have existed pre-Cataclysm.