---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-112689"
form_type: "8-K/A"
ticker: "IMSR"
cik: "0002019804"
company_name: "Terrestrial Energy Inc. /DE/"
filed_at: "2025-11-14T23:59:59+00:00"
generated_at: "2026-05-16T19:59:03.960352+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Terrestrial Energy Files Amended 8-K Including Financials for Nuclear Tech Merger

## Summary
- Business combination with HCM II Acquisition Corp. closed Oct 28, 2025; combined company now trades on Nasdaq as IMSR and IMSRW.
- Gross proceeds from the merger exceeded $292 million, including $50 million PIPE and ~$242 million from HCM II's trust.
- For nine months ended Sept 30, 2025, net loss attributable to common stockholders was $21.8 million, operating loss $18.4 million.
- Cash and cash equivalents rose to $27.7 million as of Sept 30, 2025 from $3.0 million at Dec 31, 2024.
- Filing includes unaudited financial statements of Legacy Terrestrial Energy and pro forma combined financials.

## SEC filing metadata
- accession: 0001104659-25-112689
- form_type: 8-K/A
- ticker: IMSR
- cik: 0002019804
- company_name: Terrestrial Energy Inc. /DE/
- filed_at: 2025-11-14T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.8
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2019804/000110465925112689/0001104659-25-112689-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2019804/000110465925112689/tm2531081d1_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-112689
- JSON: https://secwatch.observer/filing/0001104659-25-112689.json
- Plain text: https://secwatch.observer/filing/0001104659-25-112689.txt

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