---
schema_version: "secwatch.filing_event.v1"
accession: "0002019804-26-000006"
form_type: "8-K"
ticker: "IMSR"
cik: "0002019804"
company_name: "Terrestrial Energy Inc. /DE/"
filed_at: "2026-07-17T20:28:15+00:00"
generated_at: "2026-07-17T20:29:05.087245+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Terrestrial Energy General Counsel Steven Millsap to depart effective Sept 12, 2026

## Summary
- Steven Millsap's employment as General Counsel, Secretary and Chief Compliance Officer ends September 12, 2026.
- No replacement or interim successor has been named in the filing.
- Departure is effective approximately two months from the report date of July 14, 2026.

## SEC filing metadata
- accession: 0002019804-26-000006
- form_type: 8-K
- ticker: IMSR
- cik: 0002019804
- company_name: Terrestrial Energy Inc. /DE/
- filed_at: 2026-07-17T20:28:15+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2019804/000201980426000006/0002019804-26-000006-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2019804/000201980426000006/tmb-20260714x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0002019804-26-000006
- JSON: https://secwatch.observer/filing/0002019804-26-000006.json
- Plain text: https://secwatch.observer/filing/0002019804-26-000006.txt

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