In a fundraising environment where many tech startups are struggling to hold their valuations, Mach Industries just nearly quadrupled its. The three-year-old defense technology company announced a $300 million Series C on Monday, valuing the business at $1.8 billion — up from $470 million just twelve months ago.
For a company founded in 2023 by then-19-year-old MIT dropout Ethan Thornton, the trajectory has been extraordinary. The round was led by Infinite Capital, a deep-tech-focused fund, and Ribbit Capital, which has quietly expanded beyond its fintech roots to back some of the most aggressive bets in AI and compute infrastructure. Bedrock Capital, Sequoia Capital, and Khosla Ventures also participated.
Thornton told TechCrunch the company went out targeting $200 million and ended up significantly oversubscribed even after raising the target to $300 million: "We went out to raise 200 and we were extremely oversubscribed at 200 and happy with the price, so we decided to push up to 300. We're still oversubscribed at the 300 mark."
Mach currently has five autonomous vehicles in development — it has not publicly detailed all of them — and recently completed a major acquisition, also undisclosed. The company operates in the autonomous weapons space, which is capital-intensive by nature and increasingly favored by the defense procurement establishment as governments look for asymmetric solutions to modern conflict scenarios.
The broader trend: defense tech has become one of the hottest verticals in venture capital. A combination of elevated geopolitical tensions, rapid advances in drone and autonomous system technology, and bipartisan political support for defense modernization has pushed institutional capital into a sector that was largely taboo for Silicon Valley a decade ago. Andreessen Horowitz's American Dynamism fund, Founders Fund's deep defense positions, and now Infinite Capital's thesis all reflect the same shift.
Thornton's story — dropout-to-unicorn in three years — is being held up as emblematic of a new archetype: young founders willing to operate in regulated, hardware-heavy verticals that software-only investors have historically avoided.
Why It Matters
Mach's funding round signals that the defense tech investment wave is accelerating, not plateauing. As autonomous systems move from prototype to procurement, the startups that can demonstrate real hardware delivery — not just software — are capturing an unusual combination of venture capital enthusiasm and the promise of durable government contracts.