Founder · Valar Atomics

Isaiah Taylor

Founder & CEO of Valar Atomics, a nuclear energy company based in El Segundo.

Founder · CEOEl SegundoNuclear Energy
Founded
2023
El Segundo, United States
Raised to date
$1.8B
6 rounds on record
Latest round
Series B
$1B · 2026-08-03

About

Isaiah Taylor is Founder & CEO of Valar Atomics, a nuclear energy company based in El Segundo, founded in 2023. Valar Atomics's most recent disclosed round was a funding round of $110M in 2026-03.

Compiled from StartupFox records · updates as coverage is published

Company

Est. 2023
Valar Atomics
Nuclear Energy · El Segundo · Active

Valar Atomics builds small modular nuclear reactors, using helium-cooled, TRISO-fuelled high-temperature gas reactor designs intended to be factory-manufactured in fleets rather than built as individual projects. Its Ward 250 reactor achieved criticality in Utah in June 2026 under the US Department of Energy's Reactor Pilot Program.

Funding
2026-08-03Series B$1BSequoia Capital, Apandion Capital, Atreides Management, Conviction, Dream Ventures, HOF Capital, Point72 Ventures, Riot Ventures, Snowpoint Ventures, Valor Equity Partners
2026-08-03Credit Facility$200MErebor and other banks
2026-03Growth Equity$340MNot disclosed
2026-03Debt Facility$110MNot disclosed
Company profile →6 rounds on record

Journey with Valar Atomics

5 milestones
  1. 2023Founded

    Founded by Isaiah Taylor to develop high-temperature gas-cooled reactors, with the stated aim of building clusters of thousands of reactors for industrial power.

  2. Feb 2025Milestone

    Emerges from stealth with a contract with the Philippines Nuclear Research Institute to pilot a test-scale reactor and build two full-scale reactors.

  3. Nov 2025Milestone

    NOVA core achieves zero-power criticality at Los Alamos National Laboratory's criticality experiments facility in Nevada.

  4. Jun 2026Milestone

    Signs a development agreement with Nvidia for a waterless 30MW AI facility, and demonstrates Ward 250 powering an Nvidia Blackwell system.

  5. 18 Jun 2026Milestone

    Ward 250 completes a zero-power fuelled criticality demonstration at the Utah San Rafael Energy Lab, the second reactor under the DOE Reactor Pilot Program and the first DOE-authorised reactor built outside the national laboratory system.

Coverage

1 story
Funding · 4 Aug 2026 · 5 min read
Valar Atomics Raises $1 Billion in Sequoia-Led Round at a Reported $6 Billion Valuation