---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-26-030000"
form_type: "8-K"
ticker: "NNE"
cik: "0001923891"
company_name: "Nano Nuclear Energy Inc."
filed_at: "2026-06-25T01:09:14+00:00"
generated_at: "2026-06-25T10:05:29.366879+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Nano Nuclear terminates CTO Florent Heidet; CEO James Walker named interim Head

## Summary
- CTO and Head of Reactor Development Dr. Florent Heidet terminated effective June 22, 2026.
- Termination and appointment of interim were unanimously approved by the Board.
- CEO James Walker appointed as Interim Head of Reactor Development.
- No family relationships or reportable transactions involving Mr. Walker.

## SEC filing metadata
- accession: 0001493152-26-030000
- form_type: 8-K
- ticker: NNE
- cik: 0001923891
- company_name: Nano Nuclear Energy Inc.
- filed_at: 2026-06-25T01:09:14+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1923891/000149315226030000/0001493152-26-030000-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1923891/000149315226030000/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-26-030000
- JSON: https://secwatch.observer/filing/0001493152-26-030000.json
- Plain text: https://secwatch.observer/filing/0001493152-26-030000.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.