Steelhead Composites

• ·Steelhead Composites’s last known valuation is $10.0M (Nov 2025).
• ·It has raised $45.8M across 11 recorded rounds; the latest was Seed Round ($1.9M) in Oct 2025.
• ·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).

In 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. Vehicles like these are how secondary buyers pool demand for a name; a rising count is a demand signal.

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)