Helion Energy
Last verified 2026-05-06. JSON
The funding figures on this page are attributed, not sourced: a publisher is on record but no document URL is. How we mark provenance.
| Total raised | $1.0Battributed |
|---|---|
| Latest round | series-d+, $425.0M, 2025-01-28attributed |
| Founded | 2013 |
| Headquarters | Everett, USA |
| Industry | climate |
| Stage | series-b+ |
| Website | helionenergy.com |
Helion Energy is developing a magnetic-confinement fusion-energy system using a field-reversed-configuration pulsed approach. Microsoft pre-signed a power-purchase agreement for fusion electricity beginning 2028, the first commercial fusion-power contract. Helion's seventh prototype Polaris is the first machine targeted at net electricity.
Funding rounds
| Date | Round | Amount | Lead |
|---|---|---|---|
| 2025-01-28 | series-d+ | $425.0M | lightspeed |
Detected tech stack
Cloudflare, Three.js 181, AitThemes, Google Analytics, Google Tag Manager, jsDelivr, DoubleClick Floodlight, WordPress, PHP, MySQL, jquery 3.5.1
Provenance
| Fact | Status | Basis |
|---|---|---|
| Series D+, $425.0M | attributed | techcrunch named as publisher. No document URL on file. |
| Total raised $1.0B | attributed | techcrunch named as publisher. No document URL on file. |
| Company existence | sourced | Y Combinator named as publisher. Document, retrieved 2026-09-17. |
| Description | self-reported | helionenergy.com, read 2026-05-06 |
Change history
| Date | Fact | Change | Basis |
|---|---|---|---|
| 2026-09-24Existence: self-reported → sourced, Y Combinator, document, retrieved 2026-09-17 | Existence | self-reported → sourced | Y Combinator, document, retrieved 2026-09-17 |
Records begin 2026-09-24. All changes