Stellios Technologies Raises $5M in Pre-Seed Funding

Stellios Technologies, an El Segundo, CA-based high-energy power systems company developing high-power microwave, directed-energy, compact-fusion, and advanced-propulsion technologies, has raised $5 million in a Pre-Seed funding round.

The round saw backers including Sofreh Capital, Wave Function Ventures, Cubit Capital, Mana Ventures, Atoms & Bits, Output Capital, and Erik Bruckner, among others.

The company will use the funding to build its initial systems, establish research and manufacturing facilities, and expand its team.

What is Stellios Technologies?

Stellios Technologies develops high-energy power systems for defence and industrial applications. Its technology includes high-power microwave systems, directed-energy equipment, advanced propulsion, and compact fusion research.

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The company builds key hardware components, including vacuum-electronic devices and high-voltage power systems. It combines these with power electronics, software-based controls, and AI-supported engineering to develop smaller and more affordable systems.

Its initial commercial focus is on high-power microwave systems designed for counter-drone defence and industrial uses such as geothermal drilling, advanced materials processing, and fusion research.

How Much Funding Has Stellios Technologies Raised?

Stellios Technologies has raised $5 million in its pre-seed funding round. The source does not provide details of previous funding rounds or total funding raised to date.

Who Invested in Stellios Technologies’ Pre-Seed?

The $5 million pre-seed round included participation from:

• Sofreh Capital
• Wave Function Ventures
• Cubit Capital
• Mana Ventures
• Atoms & Bits
• Output Capital
• Erik Bruckner
• Other investors

Why the Funding Matters

Stellios Technologies will use the funding to build and deliver its initial contracted high-power microwave systems and establish research and pilot manufacturing facilities in the United States.

The company also plans to expand its engineering and leadership teams, increase sales and government business development, and continue research into compact fusion technology.

Who founded Stellios Technologies?

Stellios Technologies was founded in 2026 by Richard Starson. The company is headquartered in El Segundo, California.

"Stellios is on a mission to ensure that the United States dominates the next generation of high-energy power systems," said Dr. Richard Starson, founder and CEO of Stellios Technologies. "The ability to generate, deliver, and harness extreme levels of power will be critical to American technological and military leadership in the 21st century.

"At Cubit Capital, we look for founders with firsthand knowledge of a critical problem, the technical experience to address it, and early customer traction," said Philip Carson, Partner at Cubit Capital. "Stellios brings all three.

Market and Business Growth

Stellios is developing high-power microwave systems for defence and industrial applications. Its defence technology is designed to address electronic systems and multiple drones, while industrial applications include geothermal drilling, materials processing and plasma heating for fusion research.

The company is also developing klystrons, gyrotrons, and integrated power systems. Alongside its commercial work, it is advancing Stellios Core, its compact aneutronic fusion programme.

What Happens Next?

Stellios plans to deliver its initial contracted systems, establish domestic research and pilot manufacturing facilities and expand its team. It will also pursue government and commercial opportunities while continuing to develop its high-power microwave and compact fusion technologies.

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