York Space Systems Inc. is a vertically integrated space and defense prime contractor specializing in the rapid production of mission-ready spacecraft platforms and satellite constellations. The company's core offerings include its proprietary S-CLASS, LX-CLASS, and M-CLASS satellite platforms, which scale from 200 kg to 2,000 kg to support diverse missions such as communications, earth observation, and classified operations. York provides comprehensive end-to-end solutions spanning spacecraft manufacturing, payload integration, launch support, and on-orbit operations through its software-enabled ground systems. The vast majority of York's revenue is derived from U.S. government and defense contracts, notably serving as a primary provider for the Department of Defense's Proliferated Warfighter Space Architecture (PWSA). The company differentiates itself through a disciplined manufacturing playbook that leverages high-volume production techniques and software automation to reduce costs and accelerate delivery timelines. Recent strategic acquisitions, including Orbion Space Technology and Solestial, have further vertically integrated its supply chain in critical areas like propulsion and solar cell manufacturing.