<SEC-DOCUMENT>0000950138-25-000034-index.html : 20251222
<SEC-HEADER>0000950138-25-000034.hdr.sgml : 20251222
<ACCEPTANCE-DATETIME>20251222163147
ACCESSION NUMBER:		0000950138-25-000034
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20251218
FILED AS OF DATE:		20251222
DATE AS OF CHANGE:		20251222

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MacDiarmid John Hugh
		CENTRAL INDEX KEY:			0002092518
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-42252
		FILM NUMBER:		251592909

	MAIL ADDRESS:	
		STREET 1:		2730 W. TYVOLA ROAD, SUITE 100
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28210

ISSUER:		

	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

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>form4.xml
<DESCRIPTION>STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
<TEXT>
Document 1 - file: form4.html

Document 1 - RAW XML: form4.xml

</DOCUMENT>
</SEC-DOCUMENT>