Steelhead Composites key facts
as of Oct 2026- Manufacturer of composite overwrapped pressure vessels intended to provide lightweight, high-pressure storage for propulsion, life support, and energy systems in demanding environments.
- Steelhead Composites is valued at approximately $10.0M as of Oct 2026, set at its later-stage round, Nov 2025; nothing has traded since, per PrivateMarketView’s mark.
- It has raised $45.8M across 11 recorded rounds; the latest was Debt ($750K) in Jun 2026.
- Notable investors include Keiretsu Forum, E8 (Seattle), Denver Ventures, Lateral Capital Management, Tamarack Global — 24 tracked in total.
- 1 investment vehicle was formed to buy Steelhead Composites shares in the last 12 months, reporting $513K sold to 71 investors, per SEC Form D filings.
- Steelhead Composites has filed 11 Form Ds with the SEC since 2012, most recently Aug 2024 ($15.0M sold to 1 investors).
- Status: Privately Held (backing).
Valued at $10.0M at its later-stage round, Nov 2025. Nothing has traded since.
- ·The complete investor list: 24 names
- ·Watch Steelhead Composites: the Monday email on marks, rounds and moves
Steelhead Composites funding rounds
11 roundsVehicles formed to buy Steelhead Composites shares
secondary demand · SEC Form D filingsIn the last 12 months, 1 investment vehicle were formed to buy Steelhead Composites shares, reporting $513K sold to 71 investors. Most recent filing Dec 2025.
Membership and data by Private Market View
Who backs Steelhead Composites
24+Steelhead Composites valuation
Steelhead Composites was valued at $10 million at its later-stage round in Nov 2025. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.
How much has Steelhead Composites raised?
Steelhead Composites has raised $45.8 million across 11 recorded rounds since 2012. The largest was a $750,000 debt round in Jun 2026.
Steelhead Composites has filed 11 Form Ds with the SEC since 2012, most recently in Aug 2024 ($15 million sold to 1 investor).
Institutional holders and vehicles
In the last 12 months, 1 investment vehicle was formed to buy Steelhead Composites shares, reporting $513,400 sold to 71 investors, per SEC Form D filings (most recent Dec 2025).
Steelhead Composites investors
24 investors are on record for Steelhead Composites, including Keiretsu Forum, E8 (Seattle), Denver Ventures and Lateral Capital Management. By type, the record holds 5 venture capital firms, 1 family office and 1 angel investor. The debt round in Jun 2026 drew 1 investor.
About Steelhead Composites
Manufacturer of composite overwrapped pressure vessels intended to provide lightweight, high-pressure storage for propulsion, life support, and energy systems in demanding environments. The company offers vertically integrated manufacturing with in-house liner spinforming, filament winding, precision machining, and full qualification testing, enabling aerospace, defense, mobility, underwater, and satellite operators to deploy flight-qualified storage hardware capable of scaling from prototyping to full production.
- Sector
- Business Products and Services (B2B)
- HQ
- Golden, CO, United States
- Founded
- 2012
- Employees
- 30
- Website
- steelheadcomposites.com/
- Ownership
- Privately Held (backing)
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