# Realta Fusion

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/realta-fusion

- Industry: Power & Utilities
- Headquarters: Madison, US
- Website: www.realtafusion.com
- Total disclosed funding: $45M
- Latest round: Series A (May 1, 2025)
- Investors on record: 7

## About

Based in the US, Realta Fusion Inc. offers fusion energy solutions, modular fusion energy systems delivering zero-carbon industrial heat and power for data centers and heavy industries. Based in Wisconsin, US,, founded in 2022, Realta Fusion Inc. operates as a fusion energy company that develops compact magnetic mirror fusion generators. The company was Co-founded by Cary Forest as a spun-out of ARPA-e-funded project at the University of Wisconsin-Madison. In Feb 2026, Realta Fusion Inc. raised USD 9.5 million in venture debt funding from Silicon Valley Bank. Realta Fusion develops compact, scalable, modular CoSMo fusion energy systems that deliver zero-carbon industrial heat and electricity. Its offerings include fusion reactor system design, on-site energy solutions for data centers and heavy industries, and ongoing research, engineering, and commercialization services supporting clean energy deployment. Realta Fusion generate revenue by selling or deploying compact, modular fusion energy systems that provide on-site industrial heat and electricity, earning income from long-term energy supply agreements, system sales, and partnerships with data centers and heavy industrial customers seeking zero-carbon power. The company plans to use the February 2026 funding to continue derisking and advancing the physics of its compact, modular CoSMo fusion system toward commercialization.

## Funding rounds

- Series A, May 1, 2025, $36M — Mayfield Fund, Khosla Ventures, Future Ventures, TitletownTech Ventures, WARF Ventures, GSBackers, Avila VC
- Seed, May 12, 2023, $9M — Khosla Ventures, WARF Ventures

## Investors

- Khosla Ventures (https://capitalatlas.ai/funds/khosla-ventures) — Seed, Series A
- WARF Ventures (https://capitalatlas.ai/funds/warf-ventures) — Seed, Series A
- Mayfield Fund (https://capitalatlas.ai/funds/mayfield-fund) — Series A
- Future Ventures — Series A
- TitletownTech Ventures (https://capitalatlas.ai/funds/titletowntech-ventures) — Series A
- GSBackers (https://capitalatlas.ai/funds/gsbackers) — Series A
- Avila VC (https://capitalatlas.ai/funds/avila-vc) — Series A