# EDGAR Filing Document

**Accession Number:** 0001855118
**File Stem:** 0001213900-26-015058
**Filing Date:** 2026-2
**Character Count:** 7479
**Document Hash:** c307e2482f3516ab4bd80558c7feadaf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-015058.hdr.sgml**: 20260211

**ACCESSION NUMBER**: 0001213900-26-015058

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260211

**FILED AS OF DATE**: 20260211

**DATE AS OF CHANGE**: 20260211

**REPORTING-OWNER**: 

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

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43119
- **FILM NUMBER:** 26622437

**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:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43119
- **FILM NUMBER:** 26622436

**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 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **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. Issuer Name and Ticker or Trading Symbol**<br>HCM IV Acquisition Corp. [ HACQ ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-02-11 | **4. 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_ | **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 INVESTOR HOLDINGS IV, LLC<br>85 WASHINGTON STREET<br><sub>(Street)</sub><br>NORWALK, CT 06854<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>HCM IV Acquisition Corp. [ HACQ ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-02-11 | **4. 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>_ _ | **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 Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Class B Common Stock | <sup>(1)</sup> | <sup>(1)</sup> | Class A Common Stock | 8625000<sup>(2)</sup> | <sup>(1)</sup> | I | See footnote<sup>(2)</sup> |

---

### Footnotes:

(1) As described in the registrant's registration statement on Form S-1 under the heading "Description of Securities-Founder Shares," the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

(2) These shares of Class B common stock are held directly by HCM Investor Holdings IV, LLC (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 sole 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. These shares include an aggregate of 1,125,000 shares that are subject to forfeiture to the extent that the underwriters do not exercise their over-allotment option in connection with the registrant's initial public offering in full. 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:** 2026-02-11

**Signature:** /s/ HCM Investor Holdings IV, LLC, by Steven Bischoff with Power of Attorney  
**Date:** 2026-02-11

### 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.**