Phase Four Overview
- Year Founded
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2015
- Status
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Acquired/Merged
- Employees
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44
- Latest Deal Type
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M&A
Phase Four General Information
Description
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.
Contact Information
Website
phasefour.ioCorporate Office
- 12605 South Van Ness Avenue
- Hawthorne, CA 90250-3321
- United States
Corporate Office
- 12605 South Van Ness Avenue
- Hawthorne, CA 90250-3321
- United States
Phase Four Valuation & Funding
| Deal Type | Date | Amount | Raised to Date | Post-Val | Status | Stage |
|---|---|---|---|---|---|---|
| 15. Merger/Acquisition | 24-Sep-2025 | Completed | Generating Revenue | |||
| 14. Later Stage VC (Series C) | 17-Jan-2025 | Completed | Generating Revenue | |||
| 13. Later Stage VC | 13-Mar-2024 | Completed | Generating Revenue | |||
| 12. Accelerator/Incubator | 05-Oct-2023 | Completed | Generating Revenue | |||
| 11. Debt - General | 30-Jun-2022 | Completed | Generating Revenue | |||
| 10. Debt - General | 30-Sep-2021 | Completed | Generating Revenue | |||
| 9. Later Stage VC (Series B) | 11-Jun-2021 | Completed | Generating Revenue | |||
| 8. Debt - PPP | 30-Apr-2020 | Completed | Generating Revenue | |||
| 7. Later Stage VC (Series A) | 29-Jan-2020 | $3.57M | $15.1M | Completed | Generating Revenue | |
| 6. Seed Round | 23-May-2018 | $9.3M | $11.6M | Completed | Startup |
Phase Four Cap Table
| Stock | # of Shares Authorized |
Par Value | Dividend Rate (%) | Original Issue Price |
Liquidation | Liquidation Pref. Multiple |
Conversion Price | % Owned |
|---|---|---|---|---|---|---|---|---|
| Series B-2 | ||||||||
| Series B-1 | ||||||||
| Series A-2 | ||||||||
| Series A-1 | ||||||||
| Seed 6 | ||||||||
| Seed 5 | ||||||||
| Seed 4 | ||||||||
| Seed 3 | ||||||||
| Seed 2 | 559,198 | $0.000100 | 8% | $1.97 | $1.97 | $1.97 | 0.59% | |
| Seed 1 | 1,128,675 | $0.000100 | 8% | $0.99 | $0.99 | $0.99 | 1.18% |
Phase Four Comparisons
Industry
Financing
Details
Phase Four Competitors (6)
One of Phase Four’s 6 competitors is Benchmark Space Systems, a Venture Capital-Backed company based in Burlington, VT.
| Company Name | Financing Status | Location | Employees | Total Raised | Last Financing Date/Type | Last Financing Amount |
|---|---|---|---|---|---|---|
| Benchmark Space Systems | Venture Capital-Backed | Burlington, VT | ||||
| Enpulsion | Corporation | Schwechat, Austria | ||||
| Revolution Space | Venture Capital-Backed | Boston, MA | ||||
| Orbion Space Technology | Formerly VC-backed | Houghton, MI | ||||
| ThrustMe | Venture Capital-Backed | Paris, France |
Phase Four Related Research & Analysis
Explore institutional-grade private market research from our team of analysts.
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Verticals
Phase Four Patents
Phase Four Recent Patent Activity
| Publication ID | Patent Title | Status | First Filing Date | Technology (CPC) | Citations |
|---|---|---|---|---|---|
| EP-4026159-A1 | Propellant injector system for plasma production devices and thrusters | Pending | 04-Sep-2019 | ||
| EP-4026159-A4 | Propellant injector system for plasma production devices and thrusters | Pending | 04-Sep-2019 | ||
| WO-2021046044-A1 | Propellant injector system for plasma production devices and thrusters | Inactive | 04-Sep-2019 | ||
| WO-2020117354-A2 | Optimized rf-sourced gridded ion thruster and components | Inactive | 28-Sep-2018 | ||
| WO-2020117354-A3 | Optimized rf-sourced gridded ion thruster and components | Inactive | 28-Sep-2018 | F03H1/0043 |
Phase Four Signals
Growth Rate
Growth
Size Multiple
Key Data Points
Similarweb Unique Visitors
Majestic Referring Domains
Phase Four Former Investors (23)
| Investor Name | Investor Type | Holding | Investor Since | Participating Rounds |
|---|---|---|---|---|
| Alpha Bridge Ventures | Venture Capital | Minority | ||
| Alsop Louie Partners | Venture Capital | Minority | ||
| Alumni Ventures | Venture Capital | Minority | ||
| Arden Road Investments | Venture Capital | Minority | ||
| Autochrome Ventures | Venture Capital | Minority |
Phase Four FAQs
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When was Phase Four founded?
Phase Four was founded in 2015.
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Where is Phase Four headquartered?
Phase Four is headquartered in Hawthorne, CA.
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What is the size of Phase Four?
Phase Four has 44 total employees.
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What industry is Phase Four in?
Phase Four’s primary industry is Aerospace and Defense.
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Is Phase Four a private or public company?
Phase Four is a Private company.
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What is Phase Four’s current revenue?
The current revenue for Phase Four is .
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How much funding has Phase Four raised over time?
Phase Four has raised $63.8M.
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Who are Phase Four’s investors?
Alpha Bridge Ventures, Alsop Louie Partners, Alumni Ventures, Arden Road Investments, and Autochrome Ventures are 5 of 23 investors who have invested in Phase Four.
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Who are Phase Four’s competitors?
Benchmark Space Systems, Enpulsion, Revolution Space, Orbion Space Technology, and ThrustMe are some of the 6 competitors of Phase Four.
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When was Phase Four acquired?
Phase Four was acquired on 24-Sep-2025.
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Who acquired Phase Four?
Phase Four was acquired by Quantum Space.
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