Michael Stuart Klein - 12 Feb 2026 Form 4 Insider Report for Churchill Capital Corp X/Cayman (CCCX)

Signature
/s/ Michael Klein
Issuer symbol
CCCX
Transactions as of
12 Feb 2026
Net transactions value
$0
Form type
4
Filing time
17 Feb 2026, 16:30:07 UTC
Previous filing
19 Dec 2025

Reporting Owners (3)

Name Relationship Address Signature Signature date CIK
Klein Michael Stuart Former Chief Executive Officer, President and Chairman of the Board of Directors of CCX., Director, 10%+ Owner 640 FIFTH AVENUE, 14TH FLOOR, NEW YORK /s/ Michael Klein 17 Feb 2026 0001327392
Churchill Sponsor X LLC Former Chief Executive Officer, President and Chairman of the Board of Directors of CCX., Director, 10%+ Owner 640 FIFTH AVENUE, 14TH FLOOR, NEW YORK M. Klein Associates, Inc., By: /s/ Jay Taragin, Name: Jay Taragin, Title: Authorized Person 17 Feb 2026 0001848787
M. Klein Associates, Inc. Former Chief Executive Officer, President and Chairman of the Board of Directors of CCX., Director, 10%+ Owner 640 FIFTH AVENUE, 14TH FLOOR, NEW YORK Churchill Sponsor X LLC, By: M. Klein Associates, Inc., its manager, By: /s/ Jay Taragin, Name: Jay Taragin, Title: Authorized Person: 17 Feb 2026 0001751504

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CCCX Common Stock Conversion of derivative security +10,650,000 10,650,000 12 Feb 2026 See footnote F1, F2, F3, F4, F5

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
transaction CCCX Class B ordinary shares Conversion of derivative security -10,350,000 -100% 0 12 Feb 2026 Common Stock 10,350,000 See footnote F1, F2, F3, F5
transaction CCCX Warrant (Right to Buy) Other +75,000 75,000 12 Feb 2026 Common Stock 75,000 $11.50 See footnote F5, F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Michael Stuart Klein is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.

Explanation of Responses:

Id Content
F1 In connection with the transactions consummated on February 13, 2026 pursuant to that certain Agreement and Plan of Merger and Reorganization Agreement, dated as of September 8, 2025 (the "Merger Agreement"), by and among Infleqtion, Inc. (the "Issuer") (f/k/a Churchill Capital Corp X ("CCX")), AH Merger Sub I, Inc., a wholly owned subsidiary of the Issuer ("Merger Sub I"), AH Merger Sub II, LLC, a wholly owned subsidiary of the Issuer ("Merger Sub II") and ColdQuanta, Inc. (d/b/a Infleqtion), a Delaware corporation ("Legacy Infleqtion"). Pursuant to the Merger Agreement, and on the terms and subject to the satisfaction or waiver of the conditions set forth therein, the parties effected a business combination transaction by which Merger Sub I merged with and into the Legacy Infleqtion, with Legacy Infleqtion continuing as the surviving corporation and a wholly-owned subsidiary of the Issuer ("First Merger"),
F2 (Continued from footnote 1) and immediately following the First Merger, the surviving corporation of the First Merger merged with and into Merger Sub II, with Merger Sub II continuing as the surviving entity (the "Second Merger" and, together with the First Merger, the "Mergers").
F3 The Issuer effected a deregistration under Article 41 of CCX's amended and restated memorandum and articles of association and Section 206 of the Companies Act (As Revised) of the Cayman Islands and a domestication under Section 388 of the Delaware General Corporation Law, pursuant to which CCX's jurisdiction of incorporation changed from the Cayman Islands to the State of Delaware (the "Domestication"). Effective upon the Domestication, (i) each Class B ordinary share of the Issuer automatically converted into a Class A ordinary share (the "Class A Ordinary Share") on a one-to-one basis, and (ii) each Class A Ordinary Share converted into common stock, par value $0.0001 per share ("Common Stock"), of the Issuer, Infleqtion, Inc., on a one-to-one basis. The reporting person now holds Common Stock of the Issuer rather than Class A Ordinary Shares in a Cayman Islands company.
F4 Includes 300,000 shares which were acquired as part of 300,000 units pursuant to a Private Placement Units Purchase Agreement by and between the Churchill Sponsor X LLC (the "Sponsor") and CCX, and have been continually held since CCX's initial public offering. Effective upon the Domestication, (i) each unit of CCX separated into one share per unit and one-quarter of one whole warrant of CCX per unit, each whole warrant exercisable for one Class A Ordinary Share, (ii) each share converted into one share of Common Stock of the Issuer on a one-to-one basis and (iii) each warrant automatically converted into a warrant to acquire Common Stock of the Issuer.
F5 The reported shares and warrants of the Issuer are directly held by the Sponsor. Michael Klein is the controlling stockholder of M. Klein Associates, Inc., which is the managing member of the Sponsor. The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 under the Securities Exchange Act of 1934, as amended, or otherwise, any of the Reporting Persons is the beneficial owner of any securities reported herein. The Reporting Persons disclaim beneficial ownership of any securities of the Issuer except to the extent of such Reporting Person's pecuniary interest therein.
F6 Represents 75,000 shares underlying warrants which were acquired as part of 300,000 units pursuant to a Private Placement Units Purchase Agreement by and between the Sponsor and CCX, and have been continually held since CCX's initial public offering. Effective upon the Domestication, (i) each unit of CCX separated into one share per unit and one-quarter of one whole warrant of CCX per unit, each whole warrant exercisable for one Class A Ordinary Share, (ii) each share converted into one share of Common Stock of the Issuer on a one-to-one basis and (iii) each warrant automatically converted into a warrant to acquire Common Stock of the Issuer. The warrants become exercisable 30 days after the completion of the Mergers.

Remarks:

Former Chief Executive Officer, President and Chairman of the Board of Directors of CCX.