<SEC-DOCUMENT>0001104659-25-106325-index.html : 20251104
<SEC-HEADER>0001104659-25-106325.hdr.sgml : 20251104
<ACCEPTANCE-DATETIME>20251104163452
ACCESSION NUMBER:		0001104659-25-106325
CONFORMED SUBMISSION TYPE:	SCHEDULE 13D
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20251104
DATE AS OF CHANGE:		20251104

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Terrestrial Energy Inc. /DE/
		CENTRAL INDEX KEY:			0002019804
		STANDARD INDUSTRIAL CLASSIFICATION:	FABRICATED PLATE WORK (BOILER SHOPS) [3443]
		ORGANIZATION NAME:           	04 Manufacturing
		EIN:				981785406
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13D
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-94602
		FILM NUMBER:		251449755

	BUSINESS ADDRESS:	
		STREET 1:		2730 W. TYVOLA ROAD, SUITE 100
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28217
		BUSINESS PHONE:		203-930-2200

	MAIL ADDRESS:	
		STREET 1:		2730 W. TYVOLA ROAD, SUITE 100
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28217

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HCM II Acquisition Corp.
		DATE OF NAME CHANGE:	20240415

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Irish Simon
		CENTRAL INDEX KEY:			0002091865
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		SCHEDULE 13D

	MAIL ADDRESS:	
		STREET 1:		2730 W. TYVOLA ROAD, SUITE 100
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28210
</SEC-HEADER>
<DOCUMENT>
<TYPE>SCHEDULE 13D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-2
<SEQUENCE>2
<FILENAME>tm2530017d1_ex2.htm
<DESCRIPTION>EXHIBIT 2
<TEXT>
Document 2 - file: tm2530017d1_ex2.htm

</DOCUMENT>
</SEC-DOCUMENT>