# Helion Energy

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/helion-energy

- Industry: Power & Utilities
- Headquarters: US
- Website: www.helionenergy.com/
- Total disclosed funding: $1.6B
- Latest round: Grant (Oct 22, 2026)
- Investors on record: 15

## About

Helion Energy, Inc., based in the US, focuses on designing advanced fusion power technology to generate clean, unlimited electricity, aiming to meet global energy demands sustainably. Helion Energy, Inc. was founded in 2013 in Everett, US, and is dedicated to developing fusion power technology. In September 2026, Helion Energy, Inc. raised USD 35 million in series G funding from unspecified investors. The round was part of a larger USD 500 million series G funding. The company was co-founded by Chris Pihl, George Votroubek and David Kirtley, with David Kirtley serving as CEO. 

Helion is primarily focused on developing advanced fusion power technology aimed at generating clean, unlimited electricity. The core offering involves a proprietary fusion power plant designed to harness nuclear fusion, a process that combines atomic nuclei to release energy, similar to the processes that power the sun. This innovative technology seeks to address global energy demands while significantly reducing greenhouse gas emissions. Helion's target clientele includes governments, energy companies, and large industrial users who are interested in sustainable energy solutions. The company aims to expand its presence in international markets, specifically targeting regions with a strong emphasis on renewable energy initiatives, such as Europe, North America, and parts of Asia. Helion's revenue model is structured around partnerships and B2B transactions, reflecting its focus on providing advanced energy solutions to corporate and governmental entities. The company collaborates with energy firms and research institutions to implement its fusion technology, creating long-term agreements that may include maintenance and operational support services. This approach enables Helion to leverage its flagship power plant technology, ensuring consistent revenue through project-based contracts. Pricing plans for its services are tailored to the specific needs and scale of the client, encompassing elements such as project feasibility studies, equipment procurement, and operational consultancy, thereby fostering a mutually beneficial relationship with its customer base. The company will use the September 2026 funding for fusion energy commercialization.

## Funding rounds

- Grant, Oct 22, 2026, $175M
- Series G, Jun 4, 2026, $465M — KKR, Lightspeed Venture Partners, Capricorn Investment Group, Lux Capital, BlackRock, Thrive Capital, Mithril, BoxGroup, SB Investment Advisers, Good Ventures, Alta Park Capital, Anti Fund, Peak XV Partners
- Series F, Jan 28, 2025, $425M — Lightspeed Venture Partners, Capricorn Investment Group, Mithril, SB Investment Advisers, Good Ventures, Nucor Corporation
- Series E, Nov 5, 2021, $500M — Capricorn Investment Group, Mithril
- Series C, May 23, 2019, $10M — Capricorn Investment Group
- Series A, Jul 29, 2014, $1.5M — Y Combinator, Mithril

## Investors

- Y Combinator (https://capitalatlas.ai/funds/y-combinator) — Series A
- Mithril (https://capitalatlas.ai/funds/mithril) — Series A, Series E, Series F, Series G
- Capricorn Investment Group (https://capitalatlas.ai/funds/capricorn-investment-group) — Series C, Series E, Series F, Series G
- Lightspeed Venture Partners (https://capitalatlas.ai/funds/lightspeed-venture-partners) — Series F, Series G
- SB Investment Advisers (https://capitalatlas.ai/funds/sb-investment-advisers) — Series F, Series G
- Good Ventures — Series F, Series G
- Nucor Corporation — Series F
- KKR (https://capitalatlas.ai/funds/kkr) — Series G
- Lux Capital (https://capitalatlas.ai/funds/lux-capital) — Series G
- BlackRock (https://capitalatlas.ai/funds/blackrock) — Series G
- Thrive Capital (https://capitalatlas.ai/funds/thrive-capital) — Series G
- BoxGroup (https://capitalatlas.ai/funds/boxgroup) — Series G
- Alta Park Capital (https://capitalatlas.ai/funds/alta-park-capital) — Series G
- Anti Fund (https://capitalatlas.ai/funds/anti-fund) — Series G
- Peak XV Partners (https://capitalatlas.ai/funds/peak-xv-partners) — Series G