Yellowstone Midco Holdings II, LLC

Operating from its headquarters in Greenwood Village, Colorado, York Space Systems (formerly Yellowstone Midco Holdings II, LLC) designs, manufactures, integrates, and operates spacecraft for national security, government, and commercial customers. The company develops proprietary hardware and software solutions that address mission requirements across the space ecosystem throughout the full mission lifecycle, from design through operational deployment.

The company's core offerings include three primary spacecraft platforms: the S-CLASS, LX-CLASS, and M-CLASS satellite platforms, which serve different market segments and customer requirements. Complementing these hardware products, York Space Systems provides software capabilities that enable flexible payload integration and maintain supply chain commonalities across its platform architecture. The company also delivers software-enabled services related to spacecraft and constellation management.

Founded in 2012, York Space Systems operates as a prime contractor within the aerospace and defense sector, serving both government and commercial space markets in the United States. The company generates revenue through spacecraft manufacturing, integration services, and operational support activities across its product portfolio.