---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-060716"
form_type: "8-K"
ticker: "IMSR"
cik: "0002019804"
company_name: "Terrestrial Energy Inc. /DE/"
filed_at: "2026-05-14T11:45:23+00:00"
generated_at: "2026-05-14T11:51:29.648019+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Terrestrial Energy Q1 net loss $10.5M; cash $289.9M; NRC approves PIE Topical Report

## Summary
- Net loss of $10.5M in Q1 2026 vs $6.2M in Q4 2025, driven by higher R&D and G&A costs.
- Cash and investments of $289.9M at March 31, 2026; Q1 cash burn $7.9M.
- NRC approved IMSR Postulated Initiating Events Topical Report and issued Safety Evaluation Report.
- Signed OTA agreements with DOE for TETRA reactor pilot and TEFLA fuel line pilot projects.
- MOU with Riot Platforms to co-locate up to 4GW of IMSR nuclear capacity with data centers.

## SEC filing metadata
- accession: 0001104659-26-060716
- form_type: 8-K
- ticker: IMSR
- cik: 0002019804
- company_name: Terrestrial Energy Inc. /DE/
- filed_at: 2026-05-14T11:45:23+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.75
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2019804/000110465926060716/0001104659-26-060716-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2019804/000110465926060716/tmb-20260514x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-060716
- JSON: https://secwatch.observer/filing/0001104659-26-060716.json
- Plain text: https://secwatch.observer/filing/0001104659-26-060716.txt

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