[Form 4] Cantor Equity Partners III, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Insider sale removed prior trustee's beneficial ownership of sponsor-held shares. The reporting person, Howard W. Lutnick, reported that on 10/06/2025 he closed the sale of the voting shares of CF Group Management, Inc. that previously gave him indirect exposure to Cantor Equity Partners III, Inc. (CAEP). As a result, he no longer beneficially owns the 580,000 Class A ordinary shares and 6,900,000 Class B ordinary shares that were held by the Sponsor.

The Sponsor’s shares were sold for an aggregate price of $200,000. The filing explains that the Class B shares convert one-for-one into Class A shares at the time of the company’s initial business combination (or at holder option), so the disposed Class B shares represent potential future Class A shares upon conversion. The report disclaims any remaining beneficial ownership beyond any pecuniary interest.

Insights

Corporate Governance Analyst

Trustee sale severs an indirect ownership link to the sponsor’s founder shares.

The transaction shows a transfer of control over the voting shares of CF Group Management, Inc., which previously connected the reporting person indirectly to 580,000 Class A and 6.9M Class B shares of the company. The $200,000 consideration is disclosed as the aggregate sale price for those voting shares.

This reduces the reporting person’s indirect ownership and clarifies beneficial ownership for Section 16 reporting purposes; investors should note the Sponsor remains the record holder and that Class B shares convert one‑for‑one to Class A at an initial business combination or at holder option, a structural detail that affects voting and economic exposure over time.

Equity Securities Specialist

Large founder-share block moved between trust entities; conversion mechanics remain relevant.

The filing identifies a transfer of 6,900,000 Class B ordinary shares and 580,000 Class A ordinary shares tied to the Sponsor, with Class B shares convertible into Class A on a one-for-one basis at the initial business combination or by holder option. That conversion feature means the disposed Class B shares represent potential Class A economic interest in the future.

For shareholders, the immediate effect is a change in declared beneficial ownership by the reporting person; the longer-term impact depends on who controls the Sponsor and how those convertible shares are treated at the initial business combination timeline.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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X

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^*

LUTNICK HOWARD W

(Last) (First) (Middle)

C/O CANTOR EQUITY PARTNERS III, INC.

110 EAST 59TH STREET

(Street)

NEW YORK NY 10022

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Cantor Equity Partners III, Inc. [ CAEP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/06/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A ordinary shares	10/06/2025		S		580,000	D	(1)	0	I	See Footnote(3)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B ordinary shares	(2)	10/06/2025		S			6,900,000	(2)	(2)	Class A ordinary shares	6,900,000	(1)	0	I	See Footnote(3)

Explanation of Responses:

1. On October 6, 2025, the reporting person, in his capacity as trustee of a trust, closed the sale to trusts controlled by Brandon G. Lutnick of all of the voting shares of CF Group Management, Inc. ("CFGM"), which is the managing general partner of Cantor Fitzgerald, L.P. ("CFLP"). CFLP is the sole member of Cantor EP Holdings III, LLC (the "Sponsor"). The Sponsor is the direct owner of 580,000 Class A ordinary shares of Cantor Equity Partners III, Inc. (the "Company"), par value $0.0001 per share (the "Class A Ordinary Shares"), and 6,900,000 Class B ordinary shares of the Company, par value $0.0001 per share (the "Class B Ordinary Shares"). Following the closing of the transaction, the reporting person no longer has beneficial ownership of the 580,000 Class A Ordinary Shares and 6,900,000 Class B Ordinary Shares held by the Sponsor. The aggregate sale price of the voting shares of CFGM was $200,000.

2. As described in the Company's registration statement on Form S-1 (File No. 333-287847) under the heading "Description of Securities--Founder Shares", the Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the Company's initial business combination, or at any time and from time to time at the option of the holder, on a one-for-one basis, subject to adjustment for share sub-divisions, share dividends, reorganizations, recapitalizations and the like, and certain anti-dilution rights.

3. The Sponsor is the record holder of the shares reported herein. CFLP is the sole member of the Sponsor. CFGM is the managing general partner of CFLP. The reporting person was the trustee of CFGM's sole stockholder prior to the transaction described in footnote (1). The reporting person disclaims beneficial ownership of all securities held by the Sponsor in excess of his pecuniary interest, if any, and this report shall not be deemed an admission that he was the beneficial owner of, or had pecuniary interest in, any such excess securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

	/s/ Howard Lutnick	10/06/2025
	** Signature of Reporting Person	Date
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