Hermeus
Develops uncrewed high-Mach aircraft and turbine-based combined cycle propulsion, flying the Quarterhorse series toward supersonic and Mach 3 flight for defense customers.
X-51A WaveRider hypersonic test vehicle under a B-52 wing at Edwards Air Force Base. Photo: U.S. Air Force/Chad Bellay, Public domain (U.S. government work).
Funding history
| Date | Round | Amount |
|---|---|---|
| Apr 2026 | Series C | $350M |
Why it matters
Series C of $200M equity and $150M debt at a $1B valuation (Apr 2026); Quarterhorse Mk 2.1 flight completed, production in El Segundo and Atlanta.
Is Hermeus publicly traded?
Hermeus is privately held as of November 14, 2026: there is no ticker and no announced IPO. Shares are not available on public exchanges.
Information only, not investment advice.
Key figures confirmed by multiple sourcesLast verified November 14, 2026
Hermeus: key questions
What does Hermeus do?
Develops uncrewed high-Mach aircraft and turbine-based combined cycle propulsion, flying the Quarterhorse series toward supersonic and Mach 3 flight for defense customers.
What does Hermeus make?
Products named by Hermeus include Quarterhorse.
Where is Hermeus based?
Hermeus is headquartered in El Segundo, California. It was founded in 2018.
What is Hermeus' valuation?
Hermeus was valued at $1B as of Apr 2026, after a $350M Series C (Apr 2026).
How much funding has Hermeus raised?
Total funding is >$500M, based on announced and reported rounds. Latest round: Series C, $350M, Apr 2026.
Who are Hermeus' investors?
Notable investors include Khosla Ventures, Founders Fund, RTX Ventures, In-Q-Tel, Canaan Partners.
Is Hermeus publicly traded?
Hermeus is privately held as of November 14, 2026: there is no ticker and no announced IPO. Shares are not available on public exchanges.
Can you buy Hermeus stock?
Not on a public exchange: Hermeus is a private company. Shares of private companies change hands only in private transactions open to accredited investors, when the company allows it. This is not investment advice.
Sources
- builtin.com/articles/hermeus-raises-350m-series-c-20260408
- aeromorning.com/en/hermeus-secures-350-million-in-funding/
Figures come from company announcements, government sources and press reports. Spot an error? Send a correction. Nothing here is investment advice.
Similar companies
More hypersonic and propulsion companiesAgile Space Industries
Durango, ColoradoDesigns, 3D prints and tests in-space propulsion systems and chemical rocket engines for spacecraft and defense missions.
Beehive Industries
Centennial, ColoradoDesigns and 3D prints small expendable turbojet engines, the Frenzy family, for affordable cruise missiles, loitering munitions and drones.
Castelion
Torrance, CaliforniaDevelops low-cost, mass-producible hypersonic strike weapons, led by the Blackbeard missile, with in-house solid rocket motor production in New Mexico.