UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): July 13, 2026

CHURCHILL CAPITAL CORP XII

(Exact name of registrant as specified in its charter)

640 Fifth Avenue, 14th Floor

New York, NY 10019

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (212) 380-7500

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

Appointment of New Director

On July 13, 2026, the board of directors (the “Board”) of Churchill Capital Corp XII (the “Company”) appointed Paul Lapping as a director of the Board, effective immediately. The Board also appointed Mr. Lapping as a member of the compensation committee and the audit committee of the Board (the “Audit Committee”) and as the chairperson of the Audit Committee, replacing William Sherman, who had served as the interim chairperson of the Audit Committee. Mr. Sherman will continue to serve as a member of the Audit Committee. Mr. Lapping will serve as a member of the first class of directors, which term will expire at the Company’s first annual general meeting.

Paul D. Lapping, age 63, is the Manager of Jakal Investments, LLC, a private investment firm he founded in 2005 that focuses on technology, healthcare, fintech, and artificial intelligence sectors. Since April 2015, he has also served as the Manager of Green Pastures Management, LLC, a series LLC with underlying LLC investment vehicles, where he manages and oversees the investment activities of the series and underlying vehicles. He has served as a director of Churchill Capital Corp IX (Nasdaq: CCIX) and Churchill Capital Corp XI (Nasdaq: CCXI), each a special purpose acquisition company (“SPAC”), since April 2025 and March 2026, respectively. From August 2025 to February 2026, he also served as a director of Churchill Capital Corp X, a SPAC that completed its business combination with Infleqtion, Inc. in February 2026. From 2011 to 2012, Mr. Lapping served as Chief Operating Officer of Neostellar Capital Corp. (Nasdaq: NSLR) (f/ka SuRo Capital Corp.), a publicly traded, growth-stage venture capital firm. Prior to that, Mr. Lapping served as a director and Chief Financial Officer of New University Holdings Corp., a capital pool company listed on the TSX Venture Exchange, from August 2010 to August 2011. From October 2009 to May 2011, Mr. Lapping was Chief Financial Officer, Treasurer, Secretary, and a director of 57th Street General Acquisition Corp., a SPAC. Between 2007 and 2009, he served as Chief Financial Officer, Treasurer, and Secretary of Alternative Asset Management Acquisition Corp., also a SPAC. From 1995 to 2003, Mr. Lapping was a General Partner of Minotaur Partners II, L.P. and Merchant Partners, L.P., private equity partnerships focused on middle-market investments. From 1991 to 1995, Mr. Lapping led corporate development at Montgomery Ward Holding Corp., a diversified retail and direct marketing company. From 1988 to 1991, Mr. Lapping worked at Farley Industries, Inc. and its affiliated companies (including Fruit of the Loom, Inc. and West Point-Pepperell, Inc.) in corporate development and finance roles. Earlier in his career, Mr. Lapping worked with Golder, Thoma and Cressey, a private equity firm, and in the mergers and acquisitions group at Salomon Brothers Inc. Mr. Lapping passed the Uniform CPA Examination in 1984. He holds a Bachelor of Science degree from the University of Illinois and an M.B.A. from the J.L. Kellogg Graduate School of Management at Northwestern University. Mr. Lapping is well-qualified to serve as a member of the Board due to his significant operational, financial and leadership experience and experience serving on SPAC boards.

No family relationships exist between Mr. Lapping and any other directors or executive officers of the Company. Mr. Lapping is not a party to any arrangements with any other person pursuant to which he was nominated as a director. There are no transactions to which the Company is or was a participant and in which Mr. Lapping has a material interest subject to disclosure under Item 404(a) of Regulation S-K.

In connection with his appointment, Mr. Lapping signed a joinder to that certain letter agreement dated as of April 27, 2026, by and among the Company, its officers, its directors and Churchill Sponsor XII LLC, pursuant to which, among other things, the signatories agreed to waive certain redemption rights and to vote any ordinary shares of the Company they hold in favor of an initial business combination. Mr. Lapping also entered into a standard director indemnity agreement with the Company, a form of which was filed as Exhibit 10.7 to the Company’s Registration Statement on Form S-1 filed with the SEC on April 2, 2026.

Director Compensation Agreements

On July 14, 2026, the Company entered into a director agreement (“Director Agreement”) with each of William  Sherman and Paul Lapping, pursuant to which, in connection with each director’s continuing service as a director of the Company, the Company agreed to pay each director cash compensation of $75,000 per annum, beginning on August 1, 2026.

The foregoing summary of the Director Agreements does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Director Agreements, a form of which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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ATTACHMENTS / EXHIBITS

FORM OF DIRECTOR AGREEMENT

XBRL SCHEMA FILE

XBRL DEFINITION FILE

XBRL LABEL FILE

XBRL PRESENTATION FILE

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