# EDGAR Filing Document

**Accession Number:** 0001855118
**File Stem:** 0001213900-26-017770
**Filing Date:** 2026-2
**Character Count:** 8796
**Document Hash:** 5c8261531e729a86a1ce531384ca5e41
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-017770.hdr.sgml**: 20260218

**ACCESSION NUMBER**: 0001213900-26-017770

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260211

**FILED AS OF DATE**: 20260218

**DATE AS OF CHANGE**: 20260218

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Matthews Shawn
- **CENTRAL INDEX KEY:** 0001855118

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43119
- **FILM NUMBER:** 26646445

**MAIL ADDRESS:**
- **STREET 1:** 100 FIRST STAMFORD PLACE, SUITE 330
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06902
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** HCM Investor Holdings IV, LLC
- **CENTRAL INDEX KEY:** 0002093630

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43119
- **FILM NUMBER:** 26646444

**BUSINESS ADDRESS:**
- **STREET 1:** 100 FIRST STAMFORD PLACE
- **STREET 2:** SUITE 330
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06902
- **BUSINESS PHONE:** 203.930.2200

**MAIL ADDRESS:**
- **STREET 1:** 100 FIRST STAMFORD PLACE
- **STREET 2:** SUITE 330
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06902

**FORMER NAME:**
- **FORMER CONFORMED NAME:** Mercator Investor Holdings I, LLC
- **DATE OF NAME CHANGE:** 20251023
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HCM IV Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002089982
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 981883478
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 100 FIRST STAMFORD PLACE
- **STREET 2:** #330
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06902
- **BUSINESS PHONE:** 203.930.2200

**MAIL ADDRESS:**
- **STREET 1:** 100 FIRST STAMFORD PLACE
- **STREET 2:** #330
- **CITY:** STAMFORD
- **STATE:** CT
- **ZIP:** 06902

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Mercator I Acquisition Corp.
- **DATE OF NAME CHANGE:** 20251002

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Matthews Shawn<br><sub>(Last) (First) (Middle)</sub><br>C/O HCM IV ACQUISITION CORP.<br>85 WASHINGTON STREET<br><sub>(Street)</sub><br>NORWALK, CT 06854<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chairman and CEO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>HCM IV Acquisition Corp. [ HACQ ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>HCM Investor Holdings IV, LLC<br><sub>(Last) (First) (Middle)</sub><br>C/O HCM IV ACQUISITION CORP.<br>85 WASHINGTON STREET<br><sub>(Street)</sub><br>NORWALK, CT 06854<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [X] Other (specify below)<br>_Sponsor_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>HCM IV Acquisition Corp. [ HACQ ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B Ordinary Shares | <sup>(1)</sup> | 2026-02-11 |  | J<sup>(2)</sup> |  |  | 75000 | <sup>(1)</sup> | <sup>(1)</sup> | Class A Ordinary Shares | 75000 | $0.003 | 8550000 | I | See Footnote<sup>(3)</sup> |

---

### Footnotes:

(1) The Class B ordinary shares are automatically convertible into the shares of the Issuer's Class A ordinary shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date.

(2) In connection with the Issuer's initial public offering and the appointment of Michael J. Connor, Richard Donohoe and Thomas Sapio to the Issuer's Board of Directors, HCM IV Investor Holdings, LLC (the "Sponsor") assigned 25,000 Class B ordinary shares to each of Michael J. Connor, Richard Donohoe and Thomas Sapio.

(3) These Class B ordinary shares are held directly by the Sponsor, acquired pursuant to a subscription agreement dated as of September 5, 2025 by and among the Sponsor and the registrant. Shawn Matthews, the Chairman and Chief Executive Officer of the registrant, is the managing member of the Sponsor. Mr. Matthews has sole voting and dispositive control over the shares held by the Sponsor and may be deemed the beneficial owner of such shares. Mr. Matthews disclaims beneficial ownership over any securities owned by the Sponsor in which he does not have any pecuniary interest.

**Signature:** /s/ Shawn Matthews, by Steven Bischoff with Power of Attorney  
**Date:** 2026-02-18

**Signature:** /s/ HCM Investor Holdings IV, LLC, Steven Bischoff with Power of Attorney  
**Date:** 2026-02-18

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**