---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-057977"
form_type: "8-K"
ticker: "IMSR"
cik: "0002019804"
company_name: "Terrestrial Energy Inc. /DE/"
filed_at: "2026-05-08T23:59:59+00:00"
generated_at: "2026-05-14T21:13:59.264129+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Terrestrial Energy discloses Board resignation of David Hill, effective July 1, 2026

## Summary
- David Hill resigned from the Board of Directors, effective July 1, 2026; joined Board in 2014.
- Resignation is not the result of any disagreement with the Company's operations, policies, or practices.
- No replacement for the Board seat has been announced as of the filing date.

## SEC filing metadata
- accession: 0001104659-26-057977
- form_type: 8-K
- ticker: IMSR
- cik: 0002019804
- company_name: Terrestrial Energy Inc. /DE/
- filed_at: 2026-05-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2019804/000110465926057977/0001104659-26-057977-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2019804/000110465926057977/tmb-20260505x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-057977
- JSON: https://secwatch.observer/filing/0001104659-26-057977.json
- Plain text: https://secwatch.observer/filing/0001104659-26-057977.txt

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