- conflicts or gaps
- [[{"field": {"value": "founded_year", "source_urls": ["https://www.ycombinator.com/companies/helion-energy", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8"]}, "conflict": {"value": "2013 reported by YC, Wikipedia, LinkedIn; Tracxn reports 2010.", "source_urls": ["https://www.ycombinator.com/companies/helion-energy", "https://en.wikipedia.org/wiki/Helion_Energy", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8"]}}, {"field": {"value": "employees", "source_urls": ["https://yc-oss.github.io/api/batches/summer-2014/helion-energy.json", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8"]}, "conflict": {"value": "YC lists 150; LinkedIn 336; Wikipedia 500+ (2025); Tracxn 542 (May 2026).", "source_urls": ["https://yc-oss.github.io/api/batches/summer-2014/helion-energy.json", "https://www.linkedin.com/company/helion-energy/about/", "https://en.wikipedia.org/wiki/Helion_Energy", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8"]}}, {"field": {"value": "founders", "source_urls": ["https://www.ycombinator.com/companies/helion-energy", "https://en.wikipedia.org/wiki/Helion_Energy"]}, "conflict": {"value": "YC profile lists only David Kirtley and Chris Pihl; Wikipedia and LinkedIn also list John Slough and George Votroubek as co-founders.", "source_urls": ["https://www.ycombinator.com/companies/helion-energy", "https://en.wikipedia.org/wiki/Helion_Energy", "https://www.linkedin.com/company/helion-energy/about/"]}}, {"field": {"value": "total_funding", "source_urls": ["https://www.helionenergy.com/newsroom/helion-raises-465-million-series-g-funding-round-to-meet-surging-global-demand-for-power", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8"]}, "conflict": {"value": "Company reports $1.5B total after Series G; Tracxn reports $1.44B; LinkedIn reports ~$1.04B.", "source_urls": ["https://www.helionenergy.com/newsroom/helion-raises-465-million-series-g-funding-round-to-meet-surging-global-demand-for-power", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8", "https://www.linkedin.com/company/helion-energy/about/"]}}, {"field": {"value": "technology_milestones", "source_urls": ["https://www.helionenergy.com/newsroom/helion-raises-500m", "https://en.wikipedia.org/wiki/Helion_Energy"]}, "conflict": {"value": "2021 target to demonstrate net electricity from Polaris in 2024 not publicly announced as achieved; net electricity milestone unconfirmed as of Dec 2025.", "source_urls": ["https://www.helionenergy.com/newsroom/helion-raises-500m", "https://en.wikipedia.org/wiki/Helion_Energy"]}}, {"field": {"value": "commercial_timeline", "source_urls": ["https://www.helionenergy.com/newsroom/helion-announces-worlds-first-fusion-ppa-with-microsoft", "https://www.theverge.com/2023/5/10/23717176/microsoft-helion-fusion-energy-power-purchase-agreement-2028"]}, "conflict": {"value": "Microsoft PPA targets 50 MW by 2028; external press describes timeline as ambitious and uncertain.", "source_urls": ["https://www.helionenergy.com/newsroom/helion-announces-worlds-first-fusion-ppa-with-microsoft", "https://www.theverge.com/2023/5/10/23717176/microsoft-helion-fusion-energy-power-purchase-agreement-2028", "https://techcrunch.com/2026/06/04/helion-the-sam-altman-backed-fusion-startup-raises-465m-to-build-a-power-plant-for-microsoft/"]}}, {"field": {"value": "governance", "source_urls": ["https://www.linkedin.com/company/helion-energy/about/", "https://www.helionenergy.com/blog/announcing-500-million-fundraise"]}, "conflict": {"value": "LinkedIn update (2026-03-23) says Sam Altman stepped down from Helion board; earlier sources describe him as executive chairman.", "source_urls": ["https://www.linkedin.com/company/helion-energy/about/", "https://www.helionenergy.com/blog/announcing-500-million-fundraise"]}}, {"field": {"value": "revenue", "source_urls": ["https://www.linkedin.com/company/helion-energy/about/"]}, "conflict": {"value": "LinkedIn lists $1.5B annual revenue, likely conflating funding/valuation; no primary-source revenue disclosure found.", "source_urls": ["https://www.linkedin.com/company/helion-energy/about/"]}}]]
- source urls
- ["https://en.wikipedia.org/wiki/Helion_Energy", "https://techcrunch.com/2026/06/04/helion-the-sam-altman-backed-fusion-startup-raises-465m-to-build-a-power-plant-for-microsoft/", "https://tracxn.com/d/companies/helion/__fS6qGKScel2LE9EV85bGN9zjK8uhT4s_uRFQXu4k0M8", "https://www.fusionenergybase.com/organizations/helion-energy", "https://www.helionenergy.com/blog/announcing-500-million-fundraise", "https://www.helionenergy.com/blog/announcing-helion-fusion-ppa-with-microsoft-constellation", "https://www.helionenergy.com/newsroom/helion-announces-425m-series-f-investment-to-scale-commercialized-fusion-power", "https://www.helionenergy.com/newsroom/helion-announces-worlds-first-fusion-ppa-with-microsoft", "https://www.helionenergy.com/newsroom/helion-raises-465-million-series-g-funding-round-to-meet-surging-global-demand-for-power", "https://www.helionenergy.com/newsroom/helion-raises-500m", "https://www.linkedin.com/company/helion-energy/about/", "https://www.reuters.com/business/energy/helion-raises-425-mln-softbanks-venture-arm-hits-54-bln-valuation-2025-01-28/", "https://www.theverge.com/2023/5/10/23717176/microsoft-helion-fusion-energy-power-purchase-agreement-2028", "https://www.ycombinator.com/companies/helion-energy", "https://yc-oss.github.io/api/batches/summer-2014/helion-energy.json"]