Shawn Matthews - 31 Jul 2025 Form 3 Insider Report for HCM III ACQUISITION CORP. (HCMA)

Role: Chairman and CEO, Director
Signature: /s/ Shawn Matthews
Issuer symbol: HCMA
Transactions as of: 31 Jul 2025
Transactions value $: $0
Form type: 3
Filing time: 31 Jul 2025, 16:30:12 UTC
Previous filing: 20 Aug 2024
Next filing: 17 Oct 2025
SEC: View on sec.gov

Reporting Owners (2)

Name	Relationship	Address	Signature	Signature date	CIK
Matthews Shawn	Chairman and CEO, Director	C/O HCM III ACQUISITION CORP., 100 FIRST STAMFORD PLACE, SUITE 330, STAMFORD	/s/ Shawn Matthews	31 Jul 2025	0001855118
HCM INVESTOR HOLDINGS III, LLC	Sponsor, 10%+ Owner	C/O HCM INVESTOR HOLDINGS III, LLC, 100 FIRST STAMFORD PLACE, SUITE 330, STAMFORD	/s/ Shawn Matthews	31 Jul 2025	0002069862

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
holding	HCMA	Class B Common Stock							31 Jul 2025	Class A Common Stock	8.43M		See footnote	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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.
F2	These shares of Class B common stock are held directly by HCM III Investor Holdings, LLC (the "Sponsor"), acquired pursuant to a subscription agreement dated as of April 16, 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 1,100,000 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.

Content

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.

These shares of Class B common stock are held directly by HCM III Investor Holdings, LLC (the "Sponsor"), acquired pursuant to a subscription agreement dated as of April 16, 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 1,100,000 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.