York Space Systems Inc (YSS)

York Space Systems Inc is a common stock listing on the NYSE for York Space Systems Inc, an aerospace and defense company serving national security, government, and commercial customers in the United States. The company develops proprietary hardware and software intended to support mission requirements across the space ecosystem, with activities that include the design, production, integration, and operation of spacecraft and constellations. Its spacecraft portfolio includes the S-CLASS, LX-CLASS, and M-CLASS platforms, which are designed to address different space market needs. York Space Systems also provides software that supports payload integration and commonality across platforms, along with software-enabled services. Founded in 2012 and based in Greenwood Village, Colorado, the company was formerly known as Yellowstone Midco Holdings II, LLC and adopted its current name in January 2026.

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