John Slough Net Worth (Estimated)
Founder at Helion Energy · YC S14
Quick answer
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026.
John Slough is Founder at Helion Energy (YC S14). Independent Entrepreneurial Check model estimate from public YC data.
At a glance
- Company status: Active
- Education: University of Washington
- Region: United States of America
- Industries: Industrials, Energy
- Team size: 150
- Website: http://helionenergy.com
Who is John Slough?
John Slough is a founder of Helion Energy, which focuses on developing fusion energy technology.
Highlights:
- University of Washington
- NASA
- U.S. Department of Energy
About Helion Energy
Helion is creating the world’s first fusion power plant, enabling a future with unlimited zero-carbon electricity.
Model inputs
- Stage: series-g
- Valuation tier: reported-valuation
- Funding input: reported raise $465.0M
- Current valuation input: $15.5B
- Valuation note: Lock first-party $465M Series G at $15.5B. Do not lock the $1.5B cumulative.
- Research as-of: 2026-09-14
- Funding source: https://www.helionenergy.com/newsroom/helion-raises-465-million-series-g-funding-round-to-meet-surging-global-demand-for-power
FAQ: John Slough net worth and Helion Energy valuation
What is John Slough's net worth?
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.
John Slough net worth
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026. This John Slough net worth figure is estimated paper wealth, not a verified statement of assets.
How much is John Slough worth?
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026. How much John Slough is worth here means estimated paper wealth from public company and role data — not financial advice.
How rich is John Slough?
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026. “How rich is John Slough” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.
John Slough fortune
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026. This John Slough fortune figure is estimated paper wealth only, not a verified statement of assets.
John Slough equity value
John Slough's estimated net worth / paper wealth is $569.6M (range $398.7M–$854.4M) as of 2026. John Slough equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.
What is Helion Energy valuation?
Helion Energy's estimated valuation on Entrepreneurial Check is $15.5B. Independent model output, not a verified appraisal or official mark.
What is Helion Energy post-money valuation?
Helion Energy's estimated valuation on Entrepreneurial Check is $15.5B. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.
What is Helion Energy funding?
Helion Energy funding, when a public raise is available, is a model input on this Entrepreneurial Check profile. How much Helion Energy raised is not a complete cap table — figures are estimates only.
How much did Helion Energy raise?
How much Helion Energy raised, when disclosed, informs the estimated Helion Energy valuation and founder paper-wealth figures on this page. Independent estimate only — not a complete cap table or financial advice.
How much money did Helion Energy raise?
How much money Helion Energy raised, when a public figure is available, is a model input for the estimated Helion Energy valuation on this profile. Estimates only — not a complete cap table.
What is Helion Energy series funding?
Helion Energy series funding, when a public raise is disclosed, informs the estimated Helion Energy valuation here. Not a complete financing history.
What company is John Slough building?
John Slough is Founder at Helion Energy, a Y Combinator-backed startup (batch S14).
What does Helion Energy do?
Helion Energy — Building the world's first fusion power plant
What YC batch is John Slough from?
John Slough is associated with Y Combinator batch S14.
Where did John Slough go to school?
Public profiles associate John Slough with University of Washington.
What other companies is John Slough connected to?
Public associations for John Slough include NASA, U.S. Department of Energy.
Where is John Slough based?
Public directory data lists John Slough's region as United States of America.
What industry is John Slough in?
John Slough is listed under Industrials, Energy.
How big is Helion Energy?
Public data lists Helion Energy's team size as 150.
What else is notable about John Slough?
University of Washington.
Is Entrepreneurial Check affiliated with Y Combinator?
No. Entrepreneurial Check is an independent informational site and is not affiliated with, endorsed by, or sponsored by Y Combinator or the profiled companies.