Recent 8-K filings for IMSR

• May 14, 2026, 7:45 AM ET earnings materiality 0.75 negative item 2.02item 9.01 ◈ Earnings Releases

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

  Net loss of $10.5M in Q1 2026 vs $6.2M in Q4 2025, driven by higher R&D and G&A costs.

• March 30, 2026, 7:59 PM ET earnings materiality 0.65 neutral item 2.02item 9.01 ◈ Earnings Releases

  Terrestrial Energy reports 2025 net loss of $28M, cash $298M; IMSR project milestones advanced

  Net loss of $28M for full year 2025, up $17M YoY from $11M, driven by higher R&D (+$5M) and G&A (+$10M).

• January 29, 2026, 6:59 PM ET other material materiality 0.75 positive item 7.01item 9.01

  Terrestrial Energy provides 2025 milestones and 2026 outlook; raised $292M in business combination

  Completed business combination with HCM II, raising ~$292M gross proceeds and listing on Nasdaq under IMSR.

• November 24, 2025, 6:59 PM ET other material materiality 0.60 neutral item 4.01item 9.01 ◈ Auditor Changes ×2

  Terrestrial Energy replaces Withum with UHY as independent auditor

  Audit committee dismissed WithumSmith+Brown on Nov 21, 2025, effective upon notice Nov 24.

• November 14, 2025, 6:59 PM ET M&A materiality 0.80 neutral item 9.01

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

  Business combination with HCM II Acquisition Corp. closed Oct 28, 2025; combined company now trades on Nasdaq as IMSR and IMSRW.

• November 3, 2025, 6:59 PM ET M&A materiality 0.85 neutral item 1.01item 2.01item 5.02item 3.02item 9.01item 3.03item 5.01item 5.03item 5.05item 5.06 ◈ Governance Changes ×4◈ M&A Transactions

  Terrestrial Energy completes de-SPAC merger; shares start trading Oct 29 on Nasdaq under IMSR

  Business combination closed Oct 28; Legacy Terrestrial Energy becomes wholly owned sub of New Terrestrial Energy.

• October 29, 2025, 7:59 PM ET M&A materiality 0.75 neutral item 3.03item 5.03item 8.01item 9.01 ◈ Governance Changes ×2

  Terrestrial Energy completes de-SPAC merger; trades on Nasdaq as IMSR/IMSRW

  HCM II Acquisition Corp domesticated to Delaware corp Oct 23, 2025; merger with Legacy Terrestrial Energy closed Oct 28.

• October 22, 2025, 7:59 PM ET M&A materiality 0.85 positive item 5.07item 7.01item 9.01

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

  All proposals approved at the Oct 20 extraordinary general meeting; 15.6M votes for the business combination.

• September 29, 2025, 7:59 PM ET other material materiality 0.75 positive item 8.01item 9.01item 7.01

  HCM II and Terrestrial Energy: SEC declares S-4 effective, shareholder meeting set for Oct 20

  SEC declared effective the Registration Statement on Form S-4 on September 26, 2025 for the business combination.

• July 15, 2025, 7:59 PM ET other material materiality 0.70 negative item 4.02 ◈ Auditor Changes

  HCM II Acquisition Corp. non-reliance on FY2024, Q1 2025 financials due to related party disclosure error

  Audit committee on July 15, 2025 determined previously issued financial statements should no longer be relied upon.

• March 26, 2025, 7:59 PM ET M&A materiality 0.85 neutral item 1.01item 3.02item 7.01item 8.01item 9.01

  HCM II SPAC merges with Terrestrial Energy; $925M enterprise value, $50M PIPE

  Definitive agreement: HCM II merger sub to merge into Terrestrial Energy; target survives; enterprise value $925M.

Executive changes

Materiality & sentiment trend

Max materiality 0.85 · Median 0.70 · Most common event other_material

3 positive 2 negative 12 neutral

source · IMSR on sec.gov