Phase Four
PrivateLast Round
M&A
Sep 22, 2025
Total Funding Raised
$57.9M
Momentum
Top 25%
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.
- Aug 20, 2026
Monthly visitors increased 1726% MoM, reaching 1.8K.
- Sep 23, 2025
Multimode propulsion assets acquired by Quantum Space, LLC.
Phase Four 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 Phase Four's valuation, stock price, and market status.
Is Phase Four a public or private company?
Phase Four is a private company.
What is the current stock price of Phase Four?
Phase Four is a private company with no public stock price. No recent secondary market data is available.
How much is Phase Four worth (valuation)?
Valuation information for Phase Four is not publicly available.
Can I buy Phase Four stock?
Phase Four 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 Phase Four's last funding round?
Phase Four's most recent funding round was M&A on September 22, 2025.
Who are the main investors in Phase Four?
Key investors in Phase Four include Leonid Capital Partners, Alsop Louie Partners, New Science Ventures.
Will Phase Four IPO soon?
No public IPO plans have been announced for Phase Four.
How can I track Phase Four secondary market activity?
Caplight tracks bids, offers, and trades for private companies. Visit https://www.caplight.com to monitor Phase Four's secondary market activity and sign up for updates.