Key facts
- Phase Four’s last known valuation is $120.0M (Jun 2021).
- It has raised $63.8M across 4 recorded rounds; the latest was Early Stage VC ($12.9M) in Jan 2025.
- Phase Four has filed 5 Form Ds with the SEC since 2016, most recently Jan 2025 ($12.9M sold to 6 investors).
- Status: Acquired/Merged.
- ·Post-money valuations for all 4 rounds
- ·Watchlist + deal alerts for Phase Four
Funding rounds
4 roundsAbout Phase Four
Developer of satellite propulsion systems designed to economically advance space missions. The company's systems are small, low in mass, with a thrust-to-power ratio and a patented magnetic nozzle to direct thrust, enabling clients to reduce costs and maneuver their satellites into elliptical, geostationary and polar orbits.
- Sector
- Business Products and Services (B2B)
- HQ
- Hawthorne, CA, United States
- Founded
- 2015
- Employees
- 44
- Website
- phasefour.io/
- Ownership
- Acquired/Merged
Phase Four doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Phase Four shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Phase Four in its N-PORT filings yet. We sweep new filings monthly.