Michael Stuart Klein - May 13, 2025 Form 3 Insider Report for Churchill Capital Corp X/Cayman (CCCXU)

Role: Chief Executive Officer, President and Chairman of the Board of Directors, Director, 10%+ Owner
Signature: /s/ Michael Klein
Stock symbol: CCCXU
Transactions as of: May 13, 2025
Transactions value $: $0
Form type: 3
Date filed: 5/14/2025, 06:10 AM
Previous filing: May 2, 2025
Next filing: May 19, 2025
SEC: View on sec.gov

Reporting Owners (2)

Name	Relationship	Address	Signature	Signature date	CIK
Klein Michael Stuart	Chief Executive Officer, President and Chairman of the Board of Directors, Director, 10%+ Owner	640 FIFTH AVENUE, 14TH FLOOR, NEW YORK	/s/ Michael Klein	2025-05-13	0001327392
M. Klein Associates, Inc.	Chief Executive Officer, President and Chairman of the Board of Directors, Director, 10%+ Owner	640 FIFTH AVENUE, 14TH FLOOR, NEW YORK	M. Klein Associates, Inc., By: /s/ Jay Taragin, Name: Jay Taragin, Title: Authorized Person	2025-05-13	0001751504

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	CCCXU	Class B Ordinary Shares, par value $0.0001 per share							May 13, 2025	Class A Ordinary Shares, par value $0.0001 per share	10.4M		See Footnotes	F1, F2

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

Explanation of Responses:

Id	Content
F1	The reported shares of Churchill Capital Corp X (the "Issuer") are directly held by Churchill Sponsor X LLC (the "Sponsor") and include up to 1,350,000 Class B ordinary shares that are subject to forfeiture if the underwriters of the Issuer's initial public offering do not exercise in full an option granted to them to cover over-allotments. Pursuant to the Issuer's Amended and Restated Memorandum and Articles of Association, the Class B ordinary shares will automatically convert into the Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286799).
F2	Michael Klein is the controlling stockholder of M. Klein Associates, Inc., which is the managing member of the Sponsor.

Content

The reported shares of Churchill Capital Corp X (the "Issuer") are directly held by Churchill Sponsor X LLC (the "Sponsor") and include up to 1,350,000 Class B ordinary shares that are subject to forfeiture if the underwriters of the Issuer's initial public offering do not exercise in full an option granted to them to cover over-allotments. Pursuant to the Issuer's Amended and Restated Memorandum and Articles of Association, the Class B ordinary shares will automatically convert into the Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's initial business combination on a one-for-one basis, or at any time prior to the Issuer's initial business combination, at the option of the holder, subject to adjustment as described under the heading "Description of Securities--Founder Shares" in the Issuer's registration statement on Form S-1 (File No. 333-286799).

Michael Klein is the controlling stockholder of M. Klein Associates, Inc., which is the managing member of the Sponsor.

Remarks:

Chief Executive Officer, President and Chairman of the Board of Directors