Key facts
as of Sep 2026- Portal Space Systems’s last known valuation is $250.0M (Mar 2026).
- It has raised $80.0M across 1 recorded rounds; the latest was Later Stage VC ($61.5M) in Mar 2026.
- Notable investors include AlleyCorp, Offline Ventures, Geodesic Capital, Fuse (Seattle), First In — 15 tracked in total.
- 1 institutional filer reports fund marks on Portal Space Systems across 1 filings.
- Portal Space Systems has filed 1 Form D with the SEC, most recently Mar 2026 ($61.5M sold to 32 investors).
- Status: Privately Held (backing).
- ·Post-money valuations for all 1 rounds
- ·The complete investor list — 15 names
- ·Watchlist + deal alerts for Portal Space Systems
Recorded secondary trades
No secondary trades in Portal Space Systems shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
1 filers · latest Apr 20261 SEC-registered fund reported 1 fair-value mark on Portal Space Systems between Apr 2026 and Apr 2026. Filer-level marks and implied $/share are available to Pro members.
Funding rounds
1 roundsLeadership
- Jeffery ThornburgChief Executive Officer & Chief Technology Officer
About Portal Space Systems
Provider of space maneuverability services intended to empower the next generation of space operators to maintain space superiority. The company offers tactical responsiveness and dynamic space operations via its payload-agnostic platform, with of payload capacity and powered by a novel solar-thermal propulsion system, enabling clients to achieve tactical responsiveness in orbit on demand.
- Sector
- Business Products and Services (B2B)
- HQ
- Bothell, WA, United States
- Founded
- 2021
- Employees
- 40
- Website
- portalsystems.space/
- Ownership
- Privately Held (backing)