Is YSS a Buy? What to Consider in 2026
Short answer
The bull case for York Space Systems (YSS) rests on Government space-architecture demand: York is an incumbent prime on Space Development Agency tranches and is positioned into next-generation national security programs including missile-tracking layers and the Golden Dome initiative. Revenue (TTM) is ~$396M. If you believe that thesis holds, the real questions become position sizing and overlap, not timing. The main risk to that view: York is not yet profitable and reported a large trailing net loss, so its valuation embeds expectations of future growth and margin improvement that may not materialize. Whether YSS is a buy comes down to whether you believe the thesis. This is informational, not a recommendation, and Walnut is not an investment adviser.
York Space Systems, Inc. (NYSE: YSS) is a vertically integrated space and defense prime headquartered in Greenwood Village, Colorado. Founded in 2012 and formerly known as Yellowstone Midco Holdings II, it designs, produces, integrates, and operates spacecraft and constellations built on standardized satellite platforms (S-CLASS, LX-CLASS, and M-CLASS). Its largest customer is the US Space Development Agency, where it has been a prime awardee across the Proliferated Warfighter Space Architecture (PWSA) tranches, and it is positioned into national-security programs tied to missile tracking and the Golden Dome initiative. The company went public in late January 2026 and has been acquiring suppliers, including propulsion maker Orbion Space Technology and solar-technology firm Solestial, to build out a more vertically integrated stack. The investment picture is one of rapid top-line growth paired with heavy investment and losses. Revenue rose more than 50 percent in 2025 to roughly $386M and trailing revenue is near $396M, with management guiding 2026 revenue to a $545M to $595M range backed largely by existing backlog. At the same time the business is unprofitable, reporting a sizeable net loss, and its results skew toward fixed-price contracts and a concentrated government customer base. That combination, real contracts and a defense-demand tailwind against negative earnings and a recent-IPO valuation, is the central tension for anyone studying the name.
What's the case for buying YSS?
1. Government space-architecture demand
York is an incumbent prime on Space Development Agency tranches and is positioned into next-generation national security programs including missile-tracking layers and the Golden Dome initiative. This proliferated low-Earth-orbit build-out is a multi-year procurement cycle that underpins much of the reported backlog.
2. Backlog conversion and revenue growth
Backlog rose to roughly $642M, up about 18 percent, and management guides 2026 revenue to $545M to $595M with over 70 percent of the midpoint expected from existing backlog. Converting that pipeline into delivered spacecraft on fixed-price terms is the primary driver of the growth story.
3. Vertical integration via acquisitions
The company acquired propulsion supplier Orbion Space Technology and agreed to acquire solar-technology firm Solestial, aiming to bring more of the satellite bus in-house. Successful integration could improve margins and supply control, though it also raises execution and integration demands.
4. Commercial constellation diversification
York finalized a $187M commercial contract for a 20-plus satellite constellation on its M-CLASS platform, with a stated pathway for follow-on orders. Growing commercial revenue would reduce reliance on a single government customer over time.
What are the risks to YSS?
York is not yet profitable and reported a large trailing net loss, so its valuation embeds expectations of future growth and margin improvement that may not materialize. Customer concentration is significant, with the Space Development Agency a dominant buyer and a heavy mix of fixed-price contracts that can compress margins if costs run over. As a company that only went public in January 2026, it has a short track record as a listed issuer, limited profitability history, and a volatile share price (a 52-week range of roughly $17 to $45). Government budget shifts, program delays, and integration risk from recent acquisitions could all weigh on results.
How is YSS valued? (as of JULY 2026)
Snapshot for YSS as of July 2026, sourced from Yahoo Finance and may be delayed. Valuation figures move with price and earnings; verify the current numbers with your broker before deciding.
- Revenue (TTM): ~$396M
- 2025 Revenue: ~$386M (+52% YoY)
- 2026 Revenue guidance: ~$545M to $595M
- Net income (TTM): ~-$249M (net loss)
- Market cap: ~$2.7B to $3.2B
- Share price: ~$21 to $25
York trades at roughly 6 to 8 times trailing revenue with no positive earnings, a valuation typical of a high-growth, recently public defense-space name. Backlog of about $642M and 2026 guidance imply continued strong growth, but the net loss and heavy investment mean the market is pricing future execution rather than current profits. Figures are approximate and drawn from mid-2026 public sources.
How do you decide if YSS is a buy?
Rather than asking whether YSS is a buy in the abstract, it tends to help to answer four questions:
- Thesis: do you believe the case above, and is it still true today?
- Time horizon: a single stock can be volatile, so a longer horizon absorbs more of the swings.
- Position sizing: a thesis can be right and the sizing still wrong; decide how much of your portfolio one name should be.
- Overlap: check whether you already hold YSS indirectly through an index or sector ETF before adding more.
For the full picture, see the YSS stock guide (what the company does, the ETFs that hold it, similar stocks, and the themes it fits). In Walnut you can ask its AI about YSS against your real portfolio and see your actual exposure before deciding.
The bottom line on YSS
The bottom line: York Space Systems's story right now is Government space-architecture demand, with revenue (ttm) at ~$396M. If you believe that narrative continues, the call is about sizing YSS sensibly and checking overlap with what you own; if you doubt it (the risk: york is not yet profitable and reported a large trailing net loss, so its valuation embeds expectations of future growth and margin improvement that may not materialize.), it is not for you. Decide from the thesis, not the ticker. Walnut is not an investment adviser.
Build a basket around YSS with Walnut
Use York Space Systems as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
Is YSS a good stock to buy right now?
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The case for York Space Systems right now is Government space-architecture demand, with revenue (ttm) at ~$396M. If you believe that thesis holds, YSS is a way to own it and the real questions are sizing and overlap, not timing; the main risk to that view is york is not yet profitable and reported a large trailing net loss, so its valuation embeds expectations of future growth and margin improvement that may not materialize. So it comes down to whether you believe the thesis. Walnut is not an investment adviser and this is not a recommendation.
What does York Space Systems do?
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York Space Systems, Inc.
What are the main risks of YSS?
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York is not yet profitable and reported a large trailing net loss, so its valuation embeds expectations of future growth and margin improvement that may not materialize. Customer concentration is significant, with the Space Development Agency a dominant buyer and a heavy mix of fixed-price contracts that can compress margins if costs run over. As a company that only went public in January 2026, it has a short track record as a listed issuer, limited profitability history, and a volatile share price (a 52-week range of roughly $17 to $45). Government budget shifts, program delays, and integration risk from recent acquisitions could all weigh on results.
What company is stock ticker YSS?
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YSS is the NYSE ticker for York Space Systems, Inc., a US space and defense prime based in Greenwood Village, Colorado that designs and builds satellite platforms and constellations. It was formerly known as Yellowstone Midco Holdings II and went public in January 2026.
What does York Space Systems do?
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York designs, produces, integrates, and operates spacecraft using standardized satellite platforms marketed as S-CLASS, LX-CLASS, and M-CLASS. It serves national security, government, and commercial customers, and is a prime contractor on US Space Development Agency programs.
Is YSS a real operating business or a shell?
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It is a real operating business founded in 2012 with roughly 710 employees, about $396M in trailing revenue, a backlog near $642M, and active government and commercial contracts. It is not a shell, though it is newly public and not yet profitable.
How much revenue does York Space Systems generate?
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Trailing revenue is roughly $396M, with 2025 revenue near $386M (up more than 50 percent year over year). Management has guided 2026 revenue to a range of about $545M to $595M, largely backed by existing backlog.
Walnut is informational and is not an investment adviser. This page is educational and not a recommendation to buy or sell YSS; figures are approximate and dated, and your own situation, time horizon, and risk tolerance should drive any decision. Verify current data before investing.