companies / helionenergy-com
Generated UTC · publication cutoff 2026-11-09
Insufficient cited evidence for a two-sentence summary.
verified=2026-09-27 json
| total_raised | 1,000,000,0001.0B | ○ |
|---|---|---|
| founded | 2013 | |
| hq | Everett, USA | |
| industry | unknown | |
| stage | series-b+ |
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.
No cited completed company acquisition recorded.
Dated disclosures. Customer relationships and classifications are historical; ARR is separate from revenue.
No cited disclosure recorded: named customer, disclosed revenue, ARR, count, B2B / B2C, sector, go-to-market.
No cited valuation with an explicit basis is recorded.
Historical post-money / actual annual or stated TTM revenue. Same currency; economic valuation date within 90 days of revenue period end, inclusive. No FX, ARR, annualized revenue, estimates or projections. Conflicts and ambiguous ties are withheld.
No qualifying pair recorded.
| date | type | amount | lead | src |
|---|---|---|---|---|
| 2025-01-28 | series-d+ | 425,000,000425.0M | null | ○ |
| person | role | src |
|---|---|---|
| Chris Pihl | founder | YC |
| David Kirtley | ceo | YC |
| David Kirtley | founder | YC |
| investor | src |
|---|---|
| Lightspeed Venture Partners | ○ |
Cloudflare, Three.js 181, AitThemes, Google Analytics, Google Tag Manager, jsDelivr, DoubleClick Floodlight, WordPress, PHP, MySQL, jquery 3.5.1
| fact | status | src |
|---|---|---|
| Series D+, $425.0M | attributed | ○ |
| existence | sourced | YC |
| description | self-reported | WEB |
| date | fact | change | src |
|---|---|---|---|
| 2026-09-27latest_round: series-d+, $425.0M, 2025-01-28, lead: lightspeed → series-d+, $425.0M, 2025-01-28, lead: null, ○ 2026-09-27 | latest_round | series-d+, $425.0M, 2025-01-28, lead: lightspeed → series-d+, $425.0M, 2025-01-28, lead: null | ○ 2026-09-27 |
| 2026-09-24provenance_existence: self-reported → sourced, YC 2026-09-17 | provenance_existence | self-reported → sourced | YC 2026-09-17 |
Records begin 2026-09-24. all_changes