Hermeus Raises $350 Million at a $1 Billion Valuation as It Moves Headquarters to El Segundo

Overview

Hermeus closed a $350 million Series C on April 7, 2026, and said the round lifted the company to a $1 billion valuation, according to the company’s announcement. The defense aviation startup said the financing is meant to move it from prototyping toward mission-ready, high-Mach aircraft, with TechCrunch reporting that the package includes $200 million in equity and $150 million in debt.

What We Know

The equity portion was led by Khosla Ventures, while Canaan Partners, Founders Fund, RTX Ventures, Bling Capital, and In-Q-Tel also backed the round, according to Hermeus’ release. The company also named Cox Enterprises’ Socium Ventures, Destiny Tech100, Georgia Tech Foundation, 137 Ventures, and GSBackers among the new investors, and said debt capital is coming from Silicon Valley Bank, Pinegrove Venture Partners, Hercules Capital, and Trinity Capital, per the same announcement.

Hermeus says the money will help it build multiple aircraft in parallel, scale manufacturing capacity, and accelerate the path to ramjet-powered flight, according to the release. The company also said it is opening a new headquarters in El Segundo, California, while its Atlanta site shifts toward production, the announcement said.

The Los Angeles Times reported that Hermeus is relocating from Atlanta to El Segundo to build autonomous hypersonic aircraft for the military, opening executive offices and a facility for its next prototype, a supersonic plane intended to reach Mach 3 (Los Angeles Times). The same report said the company still has a longer-term goal of eventually developing a hypersonic plane reaching Mach 5. TechCrunch added that Hermeus flew a demonstrator last month that was about the size of an F-16, and said the next iteration is supposed to go supersonic (TechCrunch).

What We Don’t Know

Hermeus has not publicly disclosed the debt covenants, if any, attached to the $150 million debt portion, nor has it published a firm timetable for when the El Segundo facility will begin producing aircraft beyond prototypes. The sources also do not provide a customer delivery date or a schedule for the supersonic test campaign.

Analysis

The financing is notable less for the headline valuation than for how it is structured. A defense hardware startup taking on a meaningful debt tranche alongside equity suggests investors are willing to underwrite a capital-intensive aircraft program without forcing all of the risk into dilution, as TechCrunch reported. The move to El Segundo reinforces that reading: Hermeus is not just raising money, it is repositioning itself inside a Southern California aerospace cluster that the Los Angeles Times says is drawing aerospace and defense companies back into the region (Los Angeles Times).