Tuesday, October 28, 2025

Equity Corporate Actions Alert #2025 - 587
(UPDATED: CLOSED) Information Regarding the Business Combination of HCM II Acquisition Corp. (HOND/W/U)

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The business combination of HCM II Acquisition Corp. (HOND/W/U) and Terrestrial Energy Inc. closed today, Tuesday, October 28, 2025. Following the completion of the business combination, the company's Class A Ordinary Shares (HOND) and Warrants (HONDW) will undergo a name, symbol and CUSIP number change. The company's Units (HONDU) will be suspended from trading. The combined company will be listed on the NASDAQ Global Select and domiciled in Delaware. These actions will become effective on October 29, 2025.

The details of the name & CUSIP changes are follows:

Current Company Name & Issue Type: HCM II Acquisition Corp. Class A Ordinary Shares
New Company Name & Issue Type: Terrestrial Energy Inc. Common Stock
Current CUSIP: G43658106
New CUSIP: 881454102
Current Symbol: HOND
New Symbol: IMSR
Marketplace Effective Date: October 29, 2025

Current Company Name & Issue Type: HCM II Acquisition Corp. Warrant
New Company Name & Issue Type: Terrestrial Energy Inc. Warrant expiring 10/28/2030
Current CUSIP: G43658122
New CUSIP: 881454110
Current Symbol: HONDW
New Symbol: IMSRW
Marketplace Effective Date: October 29, 2025

If you would like to register as a market maker in IMSR or IMSRW, contact Nasdaq Trading Services at +1 212 231 5100.



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