Portal Space Systems key facts
as of Oct 2026- Provider of space maneuverability services intended to empower the next generation of space operators to maintain space superiority.
- Portal Space Systems is valued at approximately $217.5M as of Oct 2026, down 13% since its later-stage round, Mar 2026, per PrivateMarketView’s mark.
- 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 2 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).
Down 13% since its later-stage round, Mar 2026 ($250.0M post-money).
- ·The complete investor list: 15 names
- ·Watch Portal Space Systems: the Monday email on marks, rounds and moves
Institutional fund marks on Portal Space Systems
1 filers · latest Jul 20261 SEC-registered fund reported 2 fair-value marks on Portal Space Systems between Apr 2026 and Jul 2026. Filer-level marks and implied $/share are available to Pro members.
Membership and data by Private Market View
Portal Space Systems funding rounds
1 roundsPortal Space Systems leadership
- Jeffery ThornburgChief Executive Officer & Chief Technology Officer
Who backs Portal Space Systems
15+Portal Space Systems valuation
Portal Space Systems is valued at approximately $217 million as of Oct 2026. The figure is set by institutional fund marks. The reference point is its later-stage round in Mar 2026, at a $250 million post-money valuation; the current figure is down 13% since.
Recent activity
In the last 90 days, Portal Space Systems's record added 1 institutional fund mark (latest period Jul 2026).
How much has Portal Space Systems raised?
Portal Space Systems has raised $80 million in total; 1 of its rounds is on record. The largest on record was a $61.5 million later-stage round in Mar 2026.
Portal Space Systems has filed 1 Form D with the SEC, most recently in Mar 2026 ($61.5 million sold to 32 investors).
Institutional holders and vehicles
1 SEC-registered fund reported 2 fair-value marks on Portal Space Systems between Apr 2026 and Jul 2026, in their N-PORT filings. Filer-level marks and implied per-share values are available to Pro members.
Portal Space Systems investors
15 investors are on record for Portal Space Systems, including AlleyCorp, Offline Ventures, Geodesic Capital and Fuse (Seattle). The later-stage round in Mar 2026 drew 32 investors.
Who runs Portal Space Systems
4 people are listed on the Portal Space Systems team: 1 executive and 3 board members, including Jeffery Thornburg (Chief Executive Officer). 4 of them have a verified direct contact on file.
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)
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