Xcout Intel
PHASE FOUR, INC.
Phase Four, Inc. is an aerospace company founded in 2015 that operates in California and develops propulsion technologies.
Subscribe to see PHASE FOUR, INC.’s full profile → the full roster, investors in every round, weekly hiring history and every corporate event
PHASE FOUR, INC. at a glance
PHASE FOUR, INC. is an aerospace company headquartered in United States. It has raised at least $30.2M across the 5 funding rounds on record, 4 of them with a disclosed amount. Its most recent funding round, Growth, closed in January 2025. Xcout tracks 6 named people at PHASE FOUR, INC., including STEPHEN KISER (Chief Executive Officer).
PHASE FOUR, INC. leadership
- STEPHEN KISERChief Executive Officer
- STEPHEN KISERExecutive Officer
- JAMES BRIDENSTINEDirector
- JAMES J.A. BRIDENSTINEDirector
- Stewart AlsopDirector
- Thomas J.A. LavinDirector
PHASE FOUR, INC. funding rounds
At least $30.2M raised across the 5 rounds on record (4 with a disclosed amount). Every round on record:
| Date | Round | Amount | Investors |
|---|---|---|---|
| Growth | Undisclosed | 1 named | |
| Series B | $20M | 2 named | |
| SEC Form D filing | $5.5M | — | |
| SEC Form D filing | $3.6M | — | |
| SEC Form D filing | $1.1M | — |
Who invested in each round, lead investors, valuations and the co-investor graph — open the full funding history →
Investors
PHASE FOUR, INC. competitors
A few of PHASE FOUR, INC.'s closest competitors — see the full list of competitors and alternatives →
Pangea Aerospace, now known as Pangea Propulsion, is a specialized propulsion company headquartered in Barcelona, Spain. Founded in 2018, it focuses on advanced space propulsion solutions.
Initium Aerospace is an aviation and aerospace component manufacturing company headquartered in San Francisco, California. It specializes in space research, technology, and aerospace engineering solutions.
GATE Space builds high-thrust chemical propulsion systems and mobility solutions powered by patented rocket engines and green propellants. Their products enable satellites, capsules, and landing vehicles to perform rapid maneuvers and precise orbit and attitude control.
Venus Aerospace Corp. is a space technology company based in Texas, United States, focused on revolutionizing rocket engine propulsion, rotating detonation rocket engines (RDRE), and hypersonic flight.
Ursa Major designs and manufactures aerospace and defense systems, including hypersonics, solid rocket motors, and space propulsion technologies. Utilizing additive manufacturing and modular architectures, the company serves the defense and aerospace sectors by providing scalable, American-made propulsion systems and all-up rounds for various missions.
Dream Aerospace Technologies Pvt. Ltd. is a deeptech aerospace startup focused on delivering indigenous, green propulsion solutions for satellite missions. Its research facility is located at IIT Kanpur with founders' offices in Chennai, India.
Get PHASE FOUR, INC.'s news by email
Funding rounds, acquisitions, new executives, launches and expansions, each with a two-line summary and a link to the source. One short email a day, only when there is news.
Free: up to 5 companies, daily. Subscribers also follow whole sectors and saved filters (M&A in Israel, AI funding…), get instant alerts, in-app notifications and signed webhooks, and open the full profile behind every name. Subscribe →
Share this card
Post the link and the card appears automatically — each network fetches the image itself.
More on PHASE FOUR, INC. in Xcout Intel
- 6 named people with titles, LinkedIn and board committees
- 5 funding rounds with the investors in each, and who they co-invest with
- The full competitor set, tracking, exports and API access