Helion valuation, funding and investors
Helion works in fusion energy research and development, based in Everett, United States. Founded in 2013, it has about 589 employees.
- Last round
- Series G · $465M · Jun 2026
- Valuation at last round
- $15.50B
- Headcount
- 589 · growing
- Grade
- A
- Founded
- 2013
Helion valuation today
VCMC values Helion at $17.2B today, with a range of $13.5B to $23.4B and a grade of A. The valuation starts from its last funding round, a Series G round in Jun 2026.
Valuation by date (173 rows)
Each point is what the model would have shown on that date, using only what was known then; before its first round, a company is valued as a startup because it later raised.
| Date | Valuation | Range | Predicted in 1 yr | Phase | Headcount | Trend | Grade | Winding-down probability |
|---|---|---|---|---|---|---|---|---|
| 1 Jan 2013 | $5.09M | $1.85M – $14.0M | $5.34M (+5%) | before first round | – | unknown | D | 0% |
| 1 Feb 2013 | $5.11M | $1.86M – $14.0M | $5.36M (+5%) | before first round | – | unknown | D | 0% |
| 1 Mar 2013 | $5.13M | $1.87M – $14.1M | $5.38M (+5%) | before first round | – | unknown | D | 0% |
| 1 Apr 2013 | $5.15M | $1.88M – $14.2M | $5.40M (+5%) | before first round | – | unknown | D | 0% |
| 1 May 2013 | $5.17M | $1.88M – $14.2M | $5.42M (+5%) | before first round | – | unknown | D | 0% |
| 1 Jun 2013 | $5.19M | $1.89M – $14.3M | $5.44M (+5%) | before first round | – | unknown | D | 0% |
| 1 Jul 2013 | $5.21M | $1.90M – $14.3M | $5.46M (+5%) | before first round | – | unknown | D | 0% |
| 1 Aug 2013 | $5.23M | $1.91M – $14.4M | $5.48M (+5%) | before first round | – | unknown | D | 0% |
| 1 Sep 2013 | $5.25M | $1.91M – $14.4M | $5.51M (+5%) | before first round | – | unknown | D | 0% |
| 1 Oct 2013 | $5.27M | $1.92M – $14.5M | $5.53M (+5%) | before first round | – | unknown | D | 0% |
| 1 Nov 2013 | $5.30M | $1.93M – $14.5M | $5.55M (+5%) | before first round | – | unknown | D | 0% |
| 1 Dec 2013 | $5.32M | $1.94M – $14.6M | $5.57M (+5%) | before first round | – | unknown | D | 0% |
| 1 Jan 2014 | $6.00M | $3.94M – $18.3M | $12.0M (+100%) | after a round | – | unknown | C | 0% |
| 2 Jan 2014 | $6.01M | $3.94M – $18.3M | $12.0M (+100%) | after a round | – | unknown | C | 0% |
| 1 Feb 2014 | $6.36M | $3.94M – $18.3M | $12.0M (+89%) | after a round | – | unknown | C | 0% |
| 1 Mar 2014 | $6.71M | $3.94M – $18.3M | $12.0M (+79%) | after a round | – | unknown | C | 0% |
| 1 Apr 2014 | $7.12M | $3.94M – $18.3M | $12.0M (+69%) | after a round | – | unknown | C | 0% |
| 1 May 2014 | $7.53M | $3.94M – $18.3M | $12.0M (+59%) | after a round | – | unknown | C | 0% |
| 1 Jun 2014 | $7.99M | $3.94M – $18.3M | $12.0M (+50%) | after a round | – | unknown | C | 0% |
| 1 Jul 2014 | $8.46M | $3.94M – $18.3M | $12.0M (+42%) | after a round | – | unknown | C | 0% |
| 1 Aug 2014 | $8.97M | $3.94M – $18.3M | $12.0M (+34%) | after a round | – | unknown | C | 0% |
| 1 Sep 2014 | $9.52M | $3.94M – $18.3M | $12.0M (+26%) | after a round | – | unknown | C | 0% |
| 1 Oct 2014 | $10.1M | $3.94M – $18.3M | $12.0M (+19%) | after a round | – | unknown | C | 0% |
| 1 Nov 2014 | $10.7M | $3.94M – $18.3M | $12.0M (+12%) | after a round | – | unknown | C | 0% |
| 1 Dec 2014 | $11.3M | $3.94M – $18.3M | $12.0M (+6%) | after a round | – | unknown | C | 0% |
| 1 Jan 2015 | $12.0M | $3.94M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Feb 2015 | $12.0M | $3.75M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Mar 2015 | $12.0M | $3.58M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Apr 2015 | $12.0M | $3.40M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 May 2015 | $12.0M | $3.24M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Jun 2015 | $12.0M | $3.08M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Jul 2015 | $12.0M | $2.93M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Aug 2015 | $12.0M | $2.78M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Sep 2015 | $12.0M | $2.65M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Oct 2015 | $12.0M | $2.52M – $18.3M | $12.0M (0%) | after a round | – | unknown | C | 0% |
| 1 Nov 2015 | $12.0M | $2.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Dec 2015 | $12.0M | $2.28M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jan 2016 | $12.0M | $2.17M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Feb 2016 | $12.0M | $2.06M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Mar 2016 | $12.0M | $1.96M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Apr 2016 | $12.0M | $1.86M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 May 2016 | $12.0M | $1.78M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jun 2016 | $12.0M | $1.69M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jul 2016 | $12.0M | $1.61M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Aug 2016 | $12.0M | $1.53M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Sep 2016 | $12.0M | $1.45M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Oct 2016 | $12.0M | $1.38M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Nov 2016 | $12.0M | $1.31M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Dec 2016 | $12.0M | $1.25M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jan 2017 | $12.0M | $1.19M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Feb 2017 | $12.0M | $1.13M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Mar 2017 | $12.0M | $1.08M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Apr 2017 | $12.0M | $1.02M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 May 2017 | $12.0M | $0.97M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jun 2017 | $12.0M | $0.93M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jul 2017 | $12.0M | $0.88M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Aug 2017 | $12.0M | $0.84M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Sep 2017 | $12.0M | $0.80M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Oct 2017 | $12.0M | $0.76M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Nov 2017 | $12.0M | $0.72M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Dec 2017 | $12.0M | $0.69M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jan 2018 | $12.0M | $0.65M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Feb 2018 | $12.0M | $0.62M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Mar 2018 | $12.0M | $0.59M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Apr 2018 | $12.0M | $0.56M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 May 2018 | $12.0M | $0.54M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jun 2018 | $12.0M | $0.51M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jul 2018 | $12.0M | $0.48M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Aug 2018 | $12.0M | $0.46M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Sep 2018 | $12.0M | $0.44M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Oct 2018 | $12.0M | $0.42M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Nov 2018 | $12.0M | $0.40M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Dec 2018 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jan 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Feb 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Mar 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Apr 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 May 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jun 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jul 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Aug 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Sep 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Oct 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Nov 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Dec 2019 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jan 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Feb 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Mar 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Apr 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 May 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jun 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Jul 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Aug 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 1 Sep 2020 | $12.0M | $0.39M – $18.3M | $12.0M (0%) | after a round | – | unknown | D | 0% |
| 23 Sep 2020 | $1.3B | $1.1B – $1.9B | $1.6B (+30%) | after a round | – | unknown | A | 0% |
| 1 Oct 2020 | $1.3B | $1.1B – $1.9B | $1.6B (+29%) | after a round | – | unknown | A | 0% |
| 1 Nov 2020 | $1.3B | $1.1B – $1.9B | $1.6B (+26%) | after a round | – | unknown | A | 0% |
| 1 Dec 2020 | $1.3B | $1.1B – $1.9B | $1.6B (+24%) | after a round | – | unknown | A | 0% |
| 1 Jan 2021 | $1.3B | $1.1B – $1.9B | $1.6B (+21%) | after a round | 16 | unknown | A | 0% |
| 1 Feb 2021 | $1.4B | $1.1B – $1.9B | $1.6B (+18%) | after a round | 16 | unknown | A | 0% |
| 1 Mar 2021 | $1.4B | $1.1B – $1.9B | $1.6B (+16%) | after a round | 16 | unknown | A | 0% |
| 1 Apr 2021 | $1.4B | $1.1B – $1.9B | $1.6B (+13%) | after a round | 16 | flat | A | 0% |
| 1 May 2021 | $1.5B | $1.1B – $1.9B | $1.6B (+11%) | after a round | 16 | flat | A | 0% |
| 1 Jun 2021 | $1.5B | $1.1B – $1.9B | $1.6B (+8%) | after a round | 16 | flat | A | 0% |
| 1 Jul 2021 | $1.5B | $1.1B – $1.9B | $1.6B (+6%) | after a round | 16 | flat | A | 0% |
| 1 Aug 2021 | $1.6B | $1.1B – $1.9B | $1.6B (+4%) | after a round | 16 | flat | A | 0% |
| 1 Sep 2021 | $1.6B | $1.1B – $1.9B | $1.6B (+2%) | after a round | 16 | flat | A | 0% |
| 1 Oct 2021 | $1.6B | $1.1B – $1.9B | $1.6B (0%) | after a round | 16 | flat | A | 0% |
| 1 Nov 2021 | $1.6B | $1.0B – $1.9B | $1.6B (0%) | after a round | 16 | flat | B | 0% |
| 6 Nov 2021 | $3.0B | $2.6B – $4.5B | $3.9B (+30%) | after a round | 16 | flat | A | 0% |
| 1 Dec 2021 | $3.1B | $2.6B – $4.5B | $3.9B (+28%) | after a round | 16 | flat | A | 0% |
| 1 Jan 2022 | $3.1B | $2.6B – $4.5B | $3.9B (+25%) | after a round | 16 | flat | A | 0% |
| 1 Feb 2022 | $3.2B | $2.6B – $4.5B | $3.9B (+22%) | after a round | 35 | growing | A | 0% |
| 1 Mar 2022 | $3.3B | $2.6B – $4.5B | $3.9B (+20%) | after a round | 35 | growing | A | 0% |
| 1 Apr 2022 | $3.3B | $2.6B – $4.5B | $3.9B (+17%) | after a round | 35 | growing | A | 0% |
| 1 May 2022 | $3.4B | $2.6B – $4.5B | $3.9B (+14%) | after a round | 35 | growing | A | 0% |
| 1 Jun 2022 | $3.5B | $2.6B – $4.5B | $3.9B (+12%) | after a round | 35 | growing | A | 0% |
| 1 Jul 2022 | $3.6B | $2.6B – $4.5B | $3.9B (+10%) | after a round | 35 | growing | A | 0% |
| 1 Aug 2022 | $3.6B | $2.6B – $4.5B | $3.9B (+7%) | after a round | 35 | growing | A | 0% |
| 1 Sep 2022 | $3.7B | $2.6B – $4.5B | $3.9B (+5%) | after a round | 35 | growing | A | 0% |
| 1 Oct 2022 | $3.8B | $2.6B – $4.5B | $3.9B (+3%) | after a round | 35 | growing | A | 0% |
| 1 Nov 2022 | $3.9B | $2.6B – $4.5B | $3.9B (0%) | after a round | 35 | unknown | A | 0% |
| 1 Dec 2022 | $3.9B | $2.5B – $4.5B | $3.9B (0%) | after a round | 35 | unknown | A | 0% |
| 1 Jan 2023 | $4.8B | $2.7B – $5.5B | $4.8B (0%) | after a round | 90 | growing | B | 0% |
| 1 Feb 2023 | $4.8B | $2.8B – $5.5B | $4.8B (0%) | after a round | 90 | growing | B | 0% |
| 1 Mar 2023 | $4.8B | $2.8B – $5.5B | $4.8B (0%) | after a round | 90 | growing | B | 0% |
| 1 Apr 2023 | $4.8B | $2.9B – $5.5B | $4.8B (0%) | after a round | 90 | growing | B | 0% |
| 1 May 2023 | $4.8B | $3.0B – $5.5B | $4.8B (0%) | after a round | 90 | growing | B | 0% |
| 1 Jun 2023 | $4.8B | $3.0B – $5.5B | $4.8B (0%) | after a round | 90 | growing | A | 0% |
| 1 Jul 2023 | $4.8B | $3.1B – $5.5B | $4.8B (0%) | after a round | 90 | growing | A | 0% |
| 1 Aug 2023 | $4.8B | $3.2B – $5.5B | $4.8B (0%) | after a round | 90 | growing | A | 0% |
| 1 Sep 2023 | $389M | $256M – $651M | $428M (+10%) | after a round | 90 | unknown | B | 0% |
| 2 Sep 2023 | $389M | $256M – $651M | $428M (+10%) | after a round | 90 | unknown | B | 0% |
| 1 Oct 2023 | $392M | $256M – $651M | $428M (+9%) | after a round | 160 | growing | B | 0% |
| 1 Nov 2023 | $395M | $256M – $651M | $428M (+8%) | after a round | 160 | growing | B | 0% |
| 1 Dec 2023 | $398M | $256M – $651M | $428M (+7%) | after a round | 160 | growing | B | 0% |
| 1 Jan 2024 | $401M | $256M – $651M | $428M (+7%) | after a round | 160 | growing | B | 0% |
| 1 Feb 2024 | $405M | $256M – $651M | $428M (+6%) | after a round | 160 | growing | B | 0% |
| 1 Mar 2024 | $416M | $265M – $676M | $444M (+7%) | after a round | 190 | growing | B | 0% |
| 1 Apr 2024 | $420M | $265M – $676M | $444M (+6%) | after a round | 190 | growing | B | 0% |
| 1 May 2024 | $425M | $265M – $676M | $444M (+5%) | after a round | 190 | growing | B | 0% |
| 1 Jun 2024 | $430M | $265M – $676M | $444M (+3%) | after a round | 190 | growing | B | 0% |
| 1 Jul 2024 | $434M | $265M – $676M | $444M (+2%) | after a round | 190 | growing | B | 0% |
| 1 Aug 2024 | $464M | $282M – $718M | $472M (+2%) | after a round | 250 | growing | B | 0% |
| 1 Sep 2024 | $472M | $282M – $718M | $472M (0%) | after a round | 250 | growing | B | 0% |
| 1 Oct 2024 | $472M | $280M – $718M | $472M (0%) | after a round | 250 | growing | B | 0% |
| 1 Nov 2024 | $484M | $285M – $736M | $484M (0%) | after a round | 280 | growing | B | 0% |
| 1 Dec 2024 | $484M | $283M – $736M | $484M (0%) | after a round | 280 | growing | B | 0% |
| 1 Jan 2025 | $484M | $280M – $736M | $484M (0%) | after a round | 280 | growing | B | 0% |
| 29 Jan 2025 | $5.4B | $4.7B – $8.1B | $7.1B (+30%) | after a round | 280 | growing | A | 0% |
| 1 Feb 2025 | $5.4B | $4.7B – $8.1B | $7.1B (+30%) | after a round | 280 | growing | A | 0% |
| 1 Mar 2025 | $5.6B | $4.7B – $8.1B | $7.1B (+27%) | after a round | 280 | growing | A | 0% |
| 1 Apr 2025 | $5.7B | $4.7B – $8.1B | $7.1B (+24%) | after a round | 289 | growing | A | 0% |
| 1 May 2025 | $5.8B | $4.7B – $8.1B | $7.1B (+22%) | after a round | 289 | growing | A | 0% |
| 1 Jun 2025 | $5.9B | $4.7B – $8.1B | $7.1B (+19%) | after a round | 289 | growing | A | 0% |
| 1 Jul 2025 | $6.1B | $4.7B – $8.4B | $7.3B (+19%) | after a round | 337 | growing | A | 0% |
| 1 Aug 2025 | $6.3B | $4.7B – $8.4B | $7.3B (+16%) | after a round | 344 | growing | A | 0% |
| 1 Sep 2025 | $6.5B | $4.7B – $8.4B | $7.3B (+13%) | after a round | 344 | growing | A | 0% |
| 1 Oct 2025 | $6.6B | $4.7B – $8.4B | $7.3B (+10%) | after a round | 344 | growing | A | 0% |
| 1 Nov 2025 | $6.9B | $4.7B – $8.6B | $7.5B (+8%) | after a round | 377 | growing | B | 0% |
| 1 Dec 2025 | $7.1B | $4.7B – $8.6B | $7.5B (+5%) | after a round | 377 | growing | B | 0% |
| 1 Jan 2026 | $7.4B | $4.7B – $8.8B | $7.6B (+3%) | after a round | 414 | growing | B | 0% |
| 1 Feb 2026 | $7.6B | $4.7B – $8.8B | $7.6B (0%) | after a round | 414 | growing | B | 0% |
| 1 Mar 2026 | $7.6B | $4.8B – $8.8B | $7.6B (0%) | after a round | 414 | growing | B | 0% |
| 1 Apr 2026 | $7.6B | $4.8B – $8.8B | $7.6B (0%) | after a round | 414 | growing | A | 0% |
| 1 May 2026 | $8.1B | $5.0B – $9.3B | $8.1B (0%) | after a round | 538 | growing | B | 0% |
| 1 Jun 2026 | $8.1B | $5.1B – $9.3B | $8.1B (0%) | after a round | 538 | growing | B | 0% |
| 5 Jun 2026 | $15.5B | $13.5B – $23.2B | $20.1B (+30%) | after a round | 538 | growing | A | 0% |
| 1 Jul 2026 | $15.8B | $13.5B – $23.2B | $20.1B (+28%) | after a round | 538 | growing | A | 0% |
| 1 Aug 2026 | $16.2B | $13.5B – $23.2B | $20.1B (+25%) | after a round | 561 | growing | A | 0% |
| 1 Sep 2026 | $16.5B | $13.5B – $23.2B | $20.1B (+22%) | after a round | 561 | growing | A | 0% |
| 1 Oct 2026 | $16.9B | $13.5B – $23.4B | $20.4B (+20%) | after a round | 589 | growing | A | 0% |
| 24 Oct 2026 | $17.2B | $13.5B – $23.4B | $20.4B (+18%) | after a round | 589 | growing | A | 0% |
Key facts about Helion
- Founded
- 2013
- Headquarters
- Everett, United States
- Employees
- about 589 +56% in a year
- Total raised
- $1.47B
- Funding rounds
- 6
- Last round
- Series G Jun 2026
Helion was founded in 2013 by Anthony Pancotti, Chris Pihl, David Kirtley, George Votroubek and John Slough.
Helion funding history
Helion has 6 funding rounds on record, from Jan 2014 to Jun 2026, $1.47B in total. The latest disclosed valuation is $15.50B post-money (Series G, Jun 2026).
Series G 4 Jun 2026
Led by Thrive Capital; with Alta Park Capital, Anti Fund, BoxGroup, Lux Capital, Peak XV Partners, Capricorn Technology Impact Funds, Lightspeed Venture Partners, Mithril, SoftBank Vision Fund, Ford Motor Company, Good Ventures Foundation, University Endowment Fund.
Sources: castleplacement.com, helionenergy.com, esgtoday.com and 3 more
$465M
$15.50B post-money
Series F 28 Jan 2025
With Lightspeed Venture Partners, SoftBank Vision Fund, Mithril, Capricorn Investment Group, Nucor, Good Ventures Foundation, Sam Altman, Dustin Moskovitz, SoftBank.
Sources: helionenergy.com, helionenergy.com, techcrunch.com and 2 more
$425M
$5.42B post-money
Growth Equity 1 Sep 2023
With Nucor.
Sources: neutronbytes.com, acquinox.capital, cheddarflow.com and 1 more
$35M
Series E 5 Nov 2021
Led by Sam Altman; with Mithril, Capricorn Investment Group, Dustin Moskovitz.
Sources: helionenergy.com, axios.com, canarymedia.com
$500M
$3.00B post-money
Series D 22 Sep 2020
Led by Dustin Moskovitz; with American Express Ventures, Buckley Ventures, Celesta Capital, Electric Capital, Greylock Partners, Helium-3 Ventures, Jude Gomila Rolling Fund, Kaan Ventures, lightbank, Lightspeed Venture Partners, Lombardstreet Ventures, Prime Movers Lab, Saga, UpHonest Capital.
Sources: helionenergy.com, fusionxinvest.com
$40M
$1.25B post-money
$1.5M
Helion investors
32 investors have backed Helion; Dustin Moskovitz, Sam Altman and Thrive Capital led at least one round.
- Dustin Moskovitz lead, 3 rounds
- Sam Altman lead, 2 rounds
- Thrive Capital lead
- Lightspeed Venture Partners 3 rounds
- Capricorn Investment Group 2 rounds
- Good Ventures Foundation 2 rounds
- Nucor 2 rounds
- SoftBank Vision Fund 2 rounds
- Alta Park Capital
- American Express Ventures
- Anti Fund
- BoxGroup
- Capricorn Technology Impact Funds
- Ford Motor Company
- Greylock Partners
- Jude Gomila Rolling Fund
- Kaan Ventures
- Lux Capital
- Peak XV Partners
- SoftBank
- University Endowment Fund
- Y Combinator
What Helion does
Helion works in renewable energy companies, with 12 recorded offerings and customers in energy.
Helion Energy, Inc is an American company engaged in the development and commercialization of magneto-inertial fusion technology for fusion power generation. The company conducts research and development in accelerator physics and fusion power, with activities including the design and testing of fusion power plants and the demonstration of fusion energy feasibility through projects such as Trenta and Polaris. Helion also operates as an engineering company and technology provider within the fusion energy sector.
Description from Veridion's company data.
Products and services
- Fusion Energy Research and Development
- Magneto-Inertial Fusion Technology Development
- Plasma Confinement System Engineering
- Plasma Acceleration and Compression Engineering
- Direct Electricity Generation from Fusion
- Fusion Power Plant Construction
- Fusion Technology Demonstration
- Clean Energy Solutions Development
- Helium-3 Production from Fusion
- Accelerator Physics Application
- Fuel Utilization Technology Development
- Fusion Energy Commercialization
Markets
- Energy
Technology
- Magneto-Inertial Fusion Technology
- Plasma Acceleration for Fusion
- Direct Electricity Capture from Fusion Plasma
- Aneutronic Fusion for Helium-3 Production
Business model
- Business-to-Business
- Manufacturing
- Enterprise
Industry codes (NAICS)
- 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) 60% match
- 221118 Other Electric Power Generation 40% match
Questions about Helion
What is Helion worth?
Valuation $17.2B (range $13.5B to $23.4B), as of 24 Oct 2026. The last disclosed valuation was $15.50B (Series G, Jun 2026).
Has Helion raised money?
Helion has 6 funding rounds on record, from Jan 2014 to Jun 2026, $1.47B in total. The latest disclosed valuation is $15.50B post-money (Series G, Jun 2026).
Who has invested in Helion?
Dustin Moskovitz, Sam Altman, Thrive Capital, Mithril, Lightspeed Venture Partners and Capricorn Investment Group, and 26 more. Lead investors include Dustin Moskovitz, Sam Altman and Thrive Capital.
How many people work at Helion?
About 589, up 56% over the last year. Headcount grew from 16 in Jan 2021 to 589 in Sep 2026.
What does Helion do?
Helion works in renewable energy companies, with 12 recorded offerings and customers in energy. Its main offerings are fusion energy research and development, magneto-inertial fusion technology development and plasma confinement system engineering.
When was Helion founded, and where is it based?
Helion was founded in 2013 and is based in Everett, United States. It has about 589 employees, up 56% over the last year.