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Get filing alertsNano Nuclear terminates CTO and Head of Reactor Development; CEO assumes interim role
Filed June 25, 2026 · Period ending June 24, 2026 · ~1 min read
Key Changes
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Dr. Florent Heidet terminated as CTO and Head of Reactor Development effective June 22, 2026, by unanimous Board approval. No reason disclosed; employment agreement from March 2025 ended.
Item 5.02 verify on EDGAR → -
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CEO James Walker appointed Interim Head of Reactor Development, creating dual executive roles while the company searches for a permanent replacement.
Item 5.02 verify on EDGAR →
Summary
Nano Nuclear Energy terminated its Chief Technology Officer and Head of Reactor Development, Dr. Florent Heidet, effective June 22, 2026. The Board unanimously approved the termination, which ended his employment agreement signed just fifteen months earlier in March 2025. The filing provides no explanation for the departure—neither performance issues, strategic differences, nor voluntary resignation are mentioned.
CEO James Walker will temporarily assume the Head of Reactor Development responsibilities while the company searches for a permanent replacement. For a pre-revenue nuclear technology company, losing the executive leading reactor development is a significant operational event.
The abrupt nature of the termination (effective immediately with no transition period) and the lack of disclosed rationale create uncertainty about the company's technical leadership and development timeline. Investors should watch for announcements about a permanent CTO replacement and any updates on reactor development milestones that might be affected by this leadership change.
Section-by-Section Diff
Event · Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation
Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Compensation filed; see Key Changes for terms.
Added in current filing · verify on EDGAR →
On and effective as of June 22, 2026, Dr. Florent Heidet’s employment and service as the Chief Technology Officer and Head of Reactor Development of Nano Nuclear Energy Inc, a Nevada corporation (the “Company”), was terminated (“Termination”). The Termination included the Company’s termination of Dr. Heident’s employment agreement with the Company, dated March 6, 2025 (except for those provisions of such agreement which survive termination). The Termination was unanimously approved by the Company’s Board of Directors (the “Board”).
The company terminated Dr. Florent Heidet as Chief Technology Officer and Head of Reactor Development effective June 22, 2026. The Board unanimously approved the termination, which ended his employment agreement from March 2025. The filing does not disclose the reason for the termination or whether it was for cause.
Added in current filing · verify on EDGAR →
Also, effective as of the Termination, the Board appointed James Walker, the Company’s Chief Executive Officer, to serve as the Company’s Interim Head of Reactor Development.
CEO James Walker will serve as Interim Head of Reactor Development following Dr. Heidet's departure. This creates a dual role for the CEO while the company searches for a permanent replacement. The interim nature suggests the company intends to fill the position with a dedicated executive.
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Figures/quotes linked to EDGAR · Narrative written by AI · Jun 25, 2026 · How we verify