Phase Four is building a game-changing, high performance, in-space propulsion system. Guiding smallsat missions with unprecedented control, mission duration and cost effectiveness, Phase Four’s modular thruster is the perfect solution for a wide range of applications.
Location: United States, California, El Segundo
Employees: 11-50
Total raised: $26M
Founded date: 2015
Investors 8
Funding Rounds 1
| Date | Series | Amount | Investors |
| 11.06.2021 | Series B | $26M | - |
Mentions in press and media 26
| Date | Title | Description |
| 13.09.2025 | Apex Raises $200 Million Series D To Scale Satellite Production and Support Next-Generation Constellations | Apex Space has secured $200 million in a Series D financing round led by Interlagos, pushing its valuation above the billion-dollar mark. This latest investment underscores the company’s rapid growth and reinforces its position as a preferr... |
| 16.01.2025 | Phase Four: In-Space Propulsion Design Company Raises Series C Funding | Phase Four, a leader in advanced in-space propulsion design and manufacturing, announced the first closing of its Series C funding round. The company has secured nearly 60% of the target raise with strong participation from new and existing... |
| 14.01.2025 | Phase Four Propels Forward with Series C Funding | In the vast expanse of space, where innovation meets ambition, Phase Four is making waves. The Los Angeles-based company, a pioneer in in-space propulsion design and manufacturing, recently announced the first closing of its Series C fundin... |
| 13.01.2025 | Phase Four: In-Space Propulsion Company Raises Series C | Phase Four, a leader in advanced in-space propulsion design and manufacturing, announced the first close of its Series C funding round, securing nearly 60% of the target raise with strong participation from new and existing investors. And t... |
| 10.01.2025 | Phase Four Holds First Closing of Series C Funding | Phase Four, a Los Angeles, CA-based in-space propulsion design and manufacturing company, held the first closing of its Series C funding. The round, whose amount was not disclosed, was led by Artemis Group Capital. The company, which plans ... |
| 29.09.2024 | Agile Space Industries Raises Strategic Investment From Veteran Ventures | Veteran Ventures Capital (VVC), a VC firm focused on investing in dual-use national security technology businesses led by veteran entrepreneurs and leaders, announced a strategic investment in Agile Space Industries, a leading innovator of ... |
| 01.12.2021 | Phase Four aims to roll out its next-gen plasma thruster in the first half of 2022 | Space startup Phase Four will be rolling out the next generation of its Maxwell radio-frequency plasma propulsion system next year, which the company says offers key performance improvements to allow spacecraft using it a wider range of man... |
| 16.06.2021 | Phase Four Introduces Two New Products and Unveils Revolutionary Subscription Service for Small Satellite Manufacturers | |
| 15.06.2021 | SoftBank Vision Fund 2 builds momentum | IRL, a Gen-Z-focused messaging app maker with just 25 employees, became a unicorn on Tuesday. It’s an enormous valuation for a company with so few workers. But IRL’s attainment of unicorn status had been anticipated for a while. New social ... |
| 15.06.2021 | SoftBank ramps up its unicorn bets in 2021, taking a social media company to $1 billion | This is the web version of Term Sheet, a daily newsletter on the biggest deals and dealmakers. Sign up to get it delivered free to your inbox. IRL, a Gen-Z-focused messaging app maker with just 25 employees, became a unicorn on Tuesday. It’... |
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