Isaiah Taylor, Valar's founder and CEO, was a witness at the House Science, Space, and Technology Committee's Energy Subcommittee hearing 'Powering the Nuclear Renaissance: Accelerating U.S. Leadership in Advanced Nuclear Reactors' on 2 September 2026. The other witnesses were from Oak Ridge National Laboratory, Aalo Atomics, North Carolina State University and Antares Nuclear. His written testimony repeats company milestones: in November 2025 Valar became 'the first startup in history to achieve nuclear criticality' (NOVA); the reactor was flown in three C-17s from California to Utah in February; 'On June 18, Valar Atomics reached criticality again in our Ward250 reactor'; and a 1 July demonstration with an Nvidia chip was 'the first startup to generate nuclear electricity'. It invites members to visit the Emery County site. It does not mention fuel, enrichment, HALEU, the NRC or the lawsuit. The House repository page lists testimony, Truth in Testimony forms, biographies and member statements, but no hearing transcript, so his oral answers were not read. The milestone claims are Valar's own.

• Hearing: Powering the Nuclear Renaissance: Accelerating U.S. Leadership in Advanced Nuclear Reactors (Subcommittee on Energy) (U.S. House of Representatives, Committee Repository, 2026-09-02) primary government “Powering the Nuclear Renaissance: Accelerating U.S. Leadership in Advanced Nuclear Reactors”
• Written testimony of Isaiah Taylor, CEO and Founder, Valar Atomics (U.S. House of Representatives (witness submission), 2026-09-02) primary company “On June 18, Valar Atomics reached criticality again in our Ward250 reactor.”