Phase Four
PrivateLast Round
M&A
Sep 22, 2025
Total Funding Raised
$57.9M
Momentum
Top 50%
of companies Caplight tracks
Company Overview
Phase Four is an aerospace company that develops advanced satellite propulsion systems, including plasma propulsion and radio-frequency thrusters, to enhance the agility and cost-effectiveness of space missions.
Sector
Frontier & Industrial Tech
Verticals
Space Technology, Defense Tech, Satellite Communications
Business Model
B2B
Customer Profile
Hardware Sales, Government Contracts
AI Layer
Non-AI
Keywords
Historical Pricing
Historical view of private secondary pricing and transaction trends.
Phase Four Comparables
Compare Phase Four with similar companies based on industry and business-model similarity.
| Company | Similarity | Market Cap |
|---|---|---|
| Morpheus Space | 87% | |
| Benchmark Space Systems | 87% | |
| ThrustMe | 83% | |
Phase Four Funding Rounds
Historical fundraising activity
| Round | Date | Amount Raised | Valuation | Investors | Sources |
|---|---|---|---|---|---|
| M&A | Sep 22, 2025 | ||||
| M&A | Sep 12, 2025 | ||||
| Series C | Jan 9, 2025 | ||||
| Debt | Mar 13, 2024 | ||||
| Grant | Aug 19, 2021 | ||||
Series B | Jun 11, 2021 |
Phase Four Investors
Notable investors and investment history
| Investor | Rounds |
|---|---|
| The Artemis Group | Series C |
| Leonid Capital Partners | Debt |
| SpaceWERX | Grant |
| Defense Advanced Research Projects Agency | Grant |
| U.S. Space Force | Grant |
| Alsop Louie Partners | Seed, Series A |
| Wolverine Angel Network | Seed |
Market signals
Structured signals derived from secondary market and firmographic data.
- Sep 23, 2025
Multimode propulsion assets acquired by Quantum Space, LLC.
- Jan 9, 2025
Raised $13M with The Artemis Group participating.
Phase Four 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 Phase Four's valuation, stock price, and market status.