# EDGAR Filing Document

**Accession Number:** 0002019804
**File Stem:** 0001213900-25-091165
**Filing Date:** 2025-9
**Character Count:** 3646
**Document Hash:** 31b13f6d16f10ec3a83ed8904c87a29f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-091165.hdr.sgml**: 20260206

**ACCESSION NUMBER**: 0001213900-25-091165

**CONFORMED SUBMISSION TYPE**: CORRESP

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250924

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HCM II Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002019804
- **STANDARD INDUSTRIAL CLASSIFICATION:** FABRICATED PLATE WORK (BOILER SHOPS) [3443]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 981785406
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** CORRESP

**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
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Terrestrial Energy Inc.
- **CENTRAL INDEX KEY:** 0002027582
- **STANDARD INDUSTRIAL CLASSIFICATION:** FABRICATED PLATE WORK (BOILER SHOPS) [3443]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 991587241
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** CORRESP

**BUSINESS ADDRESS:**
- **STREET 1:** 9319 ROBERT D. SNYDER RD.
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28223
- **BUSINESS PHONE:** 646-687-8212

**MAIL ADDRESS:**
- **STREET 1:** 9319 ROBERT D. SNYDER RD.
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28223

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Terrestrial Energy Inc.
- **DATE OF NAME CHANGE:** 20240620

**HCM II Acquisition Corp.**

100 First Stamford Place, Suite 330

Stamford, CT 06902

**Terrestrial Energy Inc.**

2730 W. Tyvola Road, Suite 100

Charlotte, NC 28217

September 24, 2025

**<u>Via Edgar</u>**

U.S. Securities and Exchange Commission

Division of Corporation Finance

Office of Real Estate & Construction

100 F Street, N.E.

Washington, D.C. 20549

Attention: Eiko Yaoita Pyles Hugh West Sarah Sidwell Jennifer Angelini

---

| | |
|:---|:---|
| Re: | **HCM II Acquisition Corp.** |

---

**Registration Statement on Form S-4, as amended (File No. 333- 288735)**

Ladies and Gentlemen:

Pursuant to Rule 461 under the Securities Act of 1933, as amended, and in connection with the captioned registration statement (the "<u>Registration Statement</u>"), HCM II Acquisition Corp. (the "<u>Registrant</u>") and Terrestrial Energy Inc. (the "<u>Co-Registrant</u>") hereby respectfully request that the Registration Statement be permitted to become effective on September 26, 2025 at 4:00 p.m., Eastern Time, or as soon thereafter as practicable.

If you have any questions or comments, please do not hesitate to contact Kevin E. Manz, Esq. at (212) 556-2133 or Eliot W. Robinson, Esq. at (404) 572-6785.

[Remainder of the page intentionally left blank]

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| | |
|:---|:---|
| **HCM II ACQUISITION CORP.** | **HCM II ACQUISITION CORP.** |
| Sincerely, | Sincerely, |
| By: | /s/ Shawn Matthews |
| Name: | Shawn Matthews |
| Title: | Chief Executive Officer, HCM II Acquisition Corp. |

---

---

| | |
|:---|:---|
| **TERRESTRIAL ENERGY INC.** | **TERRESTRIAL ENERGY INC.** |
| Sincerely, | Sincerely, |
| By: | /s/ Simon Irish |
| Name: | Simon Irish |
| Title: | Chief Executive Officer, Terrestrial Energy Inc. |

---

Cc: Kevin E. Manz, Esq., King & Spalding LLP

Eliot W. Robinson, Esq., Bryan Cave Leighton Paisner LLP

Tyler F. Mark, Esq., Bryan Cave Leighton Paisner LLP