York Space Systems (Yellowstone) (YSS) Stock Price, News & Analysis
Company Description
York Space Systems Inc. (NYSE: YSS) provides space and defense mission solutions for national security, government, and commercial customers. The company operates as a U.S.-based defense and commercial prime focused on small satellites, spacecraft systems, ground operations, downlink capabilities, and software-enabled services across the space mission lifecycle.
York develops proprietary hardware and software intended to support customer requirements from spacecraft design and production through launch, operations, and mission services. Its offering spans several complementary categories: Components, Subsystems, Spacecraft Platforms, Ground Operation, Global Downlink, and Software-Enabled Services. These capabilities support missions for U.S. federal government-controlled agencies and domestic commercial customers, including national security space architectures and commercial space programs.
The company derives a majority of its revenue from long-term firm-fixed-price production contracts. These contracts are tied to the design of small satellites, launch services, and ground services. As a mission prime, York combines spacecraft manufacturing, mission operations, supply-chain coordination, and software capabilities to deliver integrated space systems rather than a single component or service line.
York’s operating model includes high-rate manufacturing capacity, a domestic supply chain, and mission operations centers that support deployed spacecraft and operational constellations. The company’s public updates describe work on national defense and warfighter space capabilities, proliferated low Earth orbit architectures, and communications demonstrations involving government and commercial services.
In 2026, York completed its acquisition of Orbion Space Technology, a manufacturer of flight-proven electric specialty aerospace systems. The acquisition added spacecraft subsystem capability to York’s integrated space ecosystem and aligned with the company’s focus on domestic production capacity and constellation-scale mission requirements.
York Space Systems is a Delaware corporation with common stock listed on the New York Stock Exchange under the symbol YSS. The company is based in Colorado, with regulatory filings identifying its principal executive office in Greenwood Village.
Stock Performance
York Space Systems (Yellowstone) (YSS) stock last closed at $18.87. At a market capitalization of $2.2B, YSS is classified as a mid-cap stock with approximately 129.7M shares outstanding.
YSS Rankings
Latest News
York Space Systems (Yellowstone) has 10 recent news articles. Of the recent coverage, 1 article coincided with positive price movement and 9 with negative movement. Key topics include acquisition. View all YSS news →
SEC Filings
York Space Systems (Yellowstone) has filed 5 recent SEC filings, including 2 Form 4, 1 Form 4/A, 1 Form 8-K/A, 1 Form 8-K. The most recent filing was submitted on July 10, 2026. SEC filings provide transparency into a company's financial condition, material events, and regulatory compliance. View all YSS SEC filings →
Financial Highlights
Upcoming Events
Production deliveries through 2027
PExT demonstration extended
Expanded PExT demonstrations
York Space Systems (Yellowstone) has 3 upcoming scheduled events. The next event, "Production deliveries through 2027", is scheduled for January 1, 2027 (in 156 days). Investors can track these dates to stay informed about potential catalysts that may affect the YSS stock price.
Short Interest History
Short interest in York Space Systems (Yellowstone) (YSS) currently stands at 8.5 million shares, up 4.4% from the previous reporting period, representing 7.3% of the float. Since January 2026, short interest has increased by 417.7%. The 8.1 days to cover indicates moderate liquidity for short covering.
Days to Cover History
Days to cover for York Space Systems (Yellowstone) (YSS) currently stands at 8.1 days, up 72% from the previous period. This moderate days-to-cover ratio suggests reasonable liquidity for short covering, requiring about a week of average trading volume. The days to cover has increased 712% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 1.0 to 8.1 days.
YSS Company Profile & Sector Positioning
York Space Systems (Yellowstone) (YSS) operates in the Aerospace & Defense industry within the broader Guided Missiles & Space Vehicles & Parts sector and is listed on the NYSE. In monthly performance, the stock ranks #3,591 among all tracked companies.