---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-101312"
form_type: "8-K"
ticker: "IMSR"
cik: "0002019804"
company_name: "Terrestrial Energy Inc. /DE/"
filed_at: "2025-10-22T23:59:59+00:00"
generated_at: "2026-05-17T02:51:41.122272+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# HCM II shareholders approve business combination with Terrestrial Energy; closing Oct 27

## Summary
- All proposals approved at the Oct 20 extraordinary general meeting; 15.6M votes for the business combination.
- Only 0.03% of outstanding Class A shares redeemed, leaving ~$243 million in trust.
- Closing expected on or about Oct 27, 2025; Nasdaq trading begins Oct 28 under tickers IMSR and IMSRW.
- Combined company will focus on Terrestrial Energy's Integral Molten Salt Reactor (IMSR) technology.

## SEC filing metadata
- accession: 0001213900-25-101312
- form_type: 8-K
- ticker: IMSR
- cik: 0002019804
- company_name: Terrestrial Energy Inc. /DE/
- filed_at: 2025-10-22T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.85
- confidence: high
- sec_items: 5.07, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2019804/000121390025101312/0001213900-25-101312-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2019804/000121390025101312/ea0261843-8k425_hcm2acq.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-101312
- JSON: https://secwatch.observer/filing/0001213900-25-101312.json
- Plain text: https://secwatch.observer/filing/0001213900-25-101312.txt

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