
Quarterhorse
Hermeus series of uncrewed high-speed test aircraft leading toward a hypersonic jet.
- Milestone
- Mar 2, 2026
Photo: Hermeus · Editorial use (company media kit)


Startup · United States
HQ Atlanta, United StatesFounded 2018
Hermeus is an aerospace company dedicated to building the world’s fastest aircraft, specializing in the rapid design, development, and testing of high-Mach and hypersonic vehicles. Their mission is to deliver advanced, cost-effective, and quickly deployable high-speed aircraft for the American warfighter, ensuring the United States and its allies maintain a technological edge in defense. Hermeus works closely with the Department of Defense and leverages innovative hybrid engine technology—combining turbine and ramjet capabilities—to enable their aircraft to take off, break the sound barrier, and accelerate to hypersonic speeds. Their product lineup includes the Chimera engine, the Quarterhorse test vehicle, and the Darkhorse hypersonic platform, all aimed at making routine and affordable testing in previously inaccessible flight environments possible.

Hermeus series of uncrewed high-speed test aircraft leading toward a hypersonic jet.
Photo: Hermeus · Editorial use (company media kit)
Newest unveiled first. Open a product for its milestone timeline, components and sources.
| Announced | Stage | Amount | Valuation | Lead investors | Other investors | Confidence |
|---|---|---|---|---|---|---|
| Apr 7, 2026 | Debt | $150M | — | — | Hercules Capital | Confirmed |
| Apr 7, 2026 | Series C | $200M | $1.00B | Khosla Ventures | 137 Ventures, Bling Capital, Canaan Partners, Founders Fund, Georgia Tech Foundation, In-Q-Tel, RTX Ventures | Confirmed |
| 2025 | Series B | Undisclosed | — | — | — | Speculative |
| Aug 22, 2024 | Series B | $40.0M | — | — | — | Confirmed |
| Mar 10, 2022 | Series B | $100M | — | — | Bling Capital, Canaan Partners, Founders Fund, In-Q-Tel, Khosla Ventures | Reported |
| Aug 5, 2021 | Grant | $60.0M | — | U.S. Air Force | — | Confirmed |
| Oct 29, 2020 | Series A | $16.0M | — | Canaan Partners | Bling Capital, Khosla Ventures | Reported |
| May 13, 2019 | Seed | Undisclosed | — | Khosla Ventures | — | Reported |
Totals add known amounts using recorded USD conversions where available; other currencies are shown separately. A ~ marks an estimated amount.
| Announced | Award | Agency | Type | Program | Obligated | Ceiling | Confidence |
|---|---|---|---|---|---|---|---|
| May 28, 2026 | DIU high-Mach flight and payload release demonstration (scaled to $219M)press:hermeus:2026-05-28:diu-high-mach | Defense Innovation Unit | Contract | — | — | Up to $219M | Confirmed |
Obligated is what has been committed so far; ceiling is the most the award can reach. Joint values cover all recipients and are excluded from this company’s money totals.
Wikipedia · Supports Organization · founded year
“The company was founded in 2018”
Black Flag · Supports Organization
“Designs, builds, and tests high-speed uncrewed aircraft for national defense and security applications, specializing in hypersonic technology.”
Hermeus · Supports Organization · name
“Hermeus | Fast Planes, Fast.”
Hermeus · Supports System
“Quarterhorse Mk 1 is the first in a series of uncrewed aircraft on Hermeus’ iterative development roadmap.”
U.S. SEC EDGAR · Apr 14, 2026 · Supports Funding round · amount
“<totalAmountSold>200589992</totalAmountSold>”
Hermeus / PR Newswire · Apr 7, 2026 · Supports Funding round · amount, Funding round · investors, Funding round · post money valuation usd
“This financing, comprising $200 million in equity and $150 million in debt”
TechCrunch · Apr 7, 2026 · Supports Funding round
“The remaining $150 million comes in the form of debt”
U.S. SEC EDGAR · Aug 27, 2024 · Supports Funding round · amount
“<totalAmountSold>119589879</totalAmountSold>”
U.S. SEC EDGAR · Aug 23, 2024 · Supports Funding round · amount
“<totalAmountSold>19227260</totalAmountSold>”
U.S. SEC EDGAR · Aug 22, 2024 · Supports Funding round · amount
“<totalAmountSold>39955107</totalAmountSold>”
CNBC · Mar 10, 2022 · Supports Funding round · amount
“Hypersonic aircraft startup Hermeus on Thursday announced a $100 million round of funding”
Hermeus (via GlobalSecurity.org) · Aug 5, 2021 · Supports Funding round · amount
“announced today the signing of a $60 million U.S. Air Force partnership for flight testing its first aircraft, Quarterhorse”
U.S. SEC EDGAR · Nov 12, 2020 · Supports Funding round · amount
“<totalAmountSold>14999986</totalAmountSold>”
TechCrunch · Oct 29, 2020 · Supports Funding round · amount
“has raised a $16 million Series A round, led by Canaan Partners”
GeekWire · May 13, 2019 · Supports Funding round
“The financing round was led by Khosla Ventures, with additional participation from private investors.”
InsideDefense · Supports Funding round
“The Air Force and a group of venture capital firms have struck a $60 million contract with Georgia-based aerospace start-up Hermeus Corporation”
Hermeus (via Airframer) · Supports Funding round
“Hermeus is excited to announce a $100 million Series B funding round led by Sam Altman.”
Hermeus · May 28, 2026 · Supports Government award
“Hermeus, a venture-backed defense aviation company, has secured a $159 million contract modification with the Defense Innovation Unit (DIU). This increases the total contract ceiling to $219 million to demonstrate high-Mach flight and high-speed payload release.”
PR Newswire via StreetInsider (Hermeus) · May 11, 2026 · Supports Role
“today announced that Zach Shore has been appointed Chief Executive Officer, effective June 1, 2026. AJ Piplica, the company's founding CEO, will transition to the role of Executive Chairman.”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.