Company: CCIXW
Filing Date: 2025-11-24
Form Type: DEF 14A
Source: 0001193125-25-293828
Chunk: 0

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-11-24
Form: DEF 14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☒ | Definitive Proxy Statement |

| ☐ | Definitive Additional Materials |

| ☐ | Soliciting Material under §240.14a-12 |

CHURCHILL CAPITAL CORP IX (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 
 14a-6(i)(1) and 0-11.                                                          |

CHURCHILL CAPITAL CORP IX 640 FIFTH AVENUE, 14 THFLOOR NEW YORK, NEW YORK 10019 LETTER TO SHAREHOLDERS Dear Churchill Capital Corp IX Shareholder: You are cordially invited to attend the annual general meeting of the shareholders (the “ Meeting”) of Churchill Capital Corp IX, a Cayman Islands exempted company (the “ Company”), which will be held on December 19, 2025, at 9:00 a.m. Eastern Time, at the offices of Ellenoff Grossman & Schole LLP, located at 1345 Avenue of the Americas, 11 thFloor, New York, New York 10105, or at such other time, on such other date and at such other place to which the Meeting may be adjourned. You will be permitted to attend the Meeting in person at the offices of Ellenoff Grossman & Schole LLP or participate virtually via the Internet. You are requested to confirm your attendance, whether in person or online, at least two business days in advance of the Meeting by contacting Ellenoff Grossman & Schole LLP, c/o Kyle Unice, 1345 Avenue of the Americas, 11 thFloor, New York, New York,