Portal Space Systems
PrivateLast Round
Series A
Mar 11, 2026
Est. Valuation
$250M
Total Funding Raised
$68.45M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
Portal Space Systems operates in Frontier & Industrial Tech and is based in Bothell, Washington. Its latest recorded funding round was a Grant round in December 2025.
Portal Space Systems is an aerospace and defense company that develops highly maneuverable, refuelable spacecraft powered by a novel solar-thermal propulsion system.
Sector
Frontier & Industrial Tech
Verticals
Space Technology, Defense Tech
Business Model
B2B
Customer Profile
Government Contracts, Hardware Sales
AI Layer
Application
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Portal Space Systems Comparables
Compare Portal Space Systems with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Starfish Space | 86% | |
| Katalyst Space Technologies | 85% | |
| ClearSpace | 84% |
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Portal Space Systems Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series A | Mar 11, 2026 | ||||
| Grant | Dec 10, 2025 | ||||
| Seed | Apr 3, 2025 | ||||
| Grant | Aug 22, 2024 | ||||
| Grant | Apr 30, 2024 |
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Key People
Founding team and executive leadership
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Portal Space Systems Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Atypical | Seed |
| Geodesic Capital | Grant, Series A |
| AlleyCorp | Grant, Series A, Seed |
| Gaingels | Series A |
| Offline Ventures | Seed |
| Trajectory Ventures | Series A |
| First In | Seed |
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Market signals
Structured signals derived from secondary market and firmographic data.
- Aug 30, 2026
Grew 23% QoQ, from 35 to 43 employees.
- Jul 21, 2026
Grew 57% QoQ, from 28 to 44 employees.
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Recent news
Latest coverage and updates
- launchesOct 21, 2026
In Mar '26, Portalsystems launches Mini-Nova, a tissue-box-sized technology demonstration payload that validates critical control and power systems in the harsh environment of space.
- recognized_asSep 29, 2026
Space Northwest named Portalsystems Emerging Space Company of the Year at its annual awards during its Space Week kickoff event in Washington, recognizing the company’s growth and development of next-generation spacecraft and orbital mobility capabilities.
- receives_awardSep 29, 2026
Portalsystems won Space Northwest’s Rising Star award for emerging space companies.
- partners_withAug 25, 2026
Portalsystems and Rebel Space Technologies, Inc. team up to explore putting spectrum monitoring technology aboard spacecraft, extending ground-based electronic-threat detection into orbit, on Aug 25th '26.
- partners_withAug 24, 2026
Portalsystems and Maverick Space Systems Inc. partner on the Motus Via Sol mission, with Maverick Space Systems Inc. serving as the exclusive launch integration partner handling payload accommodation and manifest optimization; the partnership is announced Aug 20th '26.
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Portal Space Systems Filings
Explore SEC and related filing metadata, where available.
| Type | Date | Amount Offered | Amount Sold | Filing | Pages | Download |
|---|
Filing documents are not displayed on this public page. Request access to learn about available coverage.
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Frequently Asked Questions
Common questions about Portal Space Systems's valuation, stock price, and market status.
Is Portal Space Systems a public or private company?
Portal Space Systems is a private company.
What is the current stock price of Portal Space Systems?
Portal Space Systems is a private company, so its shares have no public market price. Caplight tracks Portal Space Systems's secondary market activity and provides MarketPrice™ estimates of its share price to Caplight users.
How much is Portal Space Systems worth (valuation)?
Portal Space Systems's valuation is estimated at $250.0M based on funding round data.
Can I buy Portal Space Systems stock?
Portal Space Systems shares may be available on secondary markets subject to transfer restrictions. Caplight facilitates secondary market transactions for accredited investors.
When was Portal Space Systems's last funding round?
Portal Space Systems's most recent funding round was Series A on March 11, 2026.
Who are the main investors in Portal Space Systems?
Key investors in Portal Space Systems include Geodesic Capital, AlleyCorp, Mach33 Financial Group.
Will Portal Space Systems IPO soon?
No public IPO plans have been announced for Portal Space Systems.
How can I track Portal Space Systems secondary market activity?
Caplight tracks bids, offers, and trades in Portal Space Systems's shares on secondary markets.