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
B2B
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.
- Jul 21, 2026
Grew 57% QoQ, from 28 to 44 employees.
- Jun 27, 2026
Grew 91% QoQ, from 22 to 42 employees.
Portal Space Systems Filings
SEC and related filings with document metadata.
| Typed | Date | Amount Offered | Amount Sold | Filling | Pages | Download |
|---|---|---|---|---|---|---|
Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation |
Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation |
Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation |
Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation | Sign Up to view | Mock Valuation |
Frequently Asked Questions
Common questions about Portal Space Systems's valuation, stock price, and market status.