Portal Space Systems
PrivateLast Round
Series A
Mar 26, 2026
Est. Valuation
$250M
Total Funding Raised
$68.45M
Momentum
Top 5%
of companies Caplight tracks
Company Overview
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, Computing Hardware
Business Model
B2G
Customer Profile
Government Contracts, Hardware Sales
AI Layer
Application
Keywords
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 | 87% | |
| Katalyst Space Technologies | 83% | |
| ClearSpace | 80% |
Portal Space Systems Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| Series A | Mar 26, 2026 | ||||
| Grant | Dec 10, 2025 | ||||
| Seed | Apr 3, 2025 | ||||
| Grant | Aug 22, 2024 | ||||
| Grant | Apr 30, 2024 |
Portal Space Systems Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| Atypical | Seed |
| Geodesic Capital | Grant, Series A |
| AlleyCorp | Grant, Series A, Seed |
| Offline Ventures | Seed |
| Trajectory Ventures | Series A |
| First In | Seed |
| Booz Allen Ventures | Grant, Series A |
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.
Recent news
Latest coverage and updates
- partners_withAug 25, 2026
Portalsystems partnered with Rebel Space Technologies, Inc. on Aug 25th '26.
- partners_withAug 24, 2026
Portalsystems partnered with Maverick Space Systems Inc. on Aug 20th '26.
- launchesAug 20, 2026
Portalsystems will launch Supernova spacecraft on Jul 1st '28.
- expands_facilitiesAug 20, 2026
Portalsystems will expand facilities to Bothell, Washington, United States, Northern America, Americas on Jul 1st '27.
- launchesAug 18, 2026
Portalsystems launched Starburst-1 on Aug 18th '26.
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.
Request accessFrequently 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 with no public stock price. No recent secondary market data is available.
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. Visit https://www.caplight.com to learn more.
When was Portal Space Systems's last funding round?
Portal Space Systems's most recent funding round was Series A on April 9, 2024.
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 for private companies. Visit https://www.caplight.com to monitor Portal Space Systems's secondary market activity and sign up for updates.