Company: CCIXW
Filing Date: 2025-12-05
Form Type: S-4/A
Source: 0001193125-25-309933
Chunk: 53

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-12-05
Form: S-4/A
Chunk 53
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 of CCIX by way of continuation from the Cayman Islands to the State of Delaware (the “ Domestication ”), and (2) following the Domestication, the merger of Merger Sub I with and into PlusAI, with PlusAI surviving such merger as a wholly owned subsidiary of CCIX, and immediately thereafter, PlusAI will merge with and into Merger Sub II, with Merger Sub II continuing as the surviving entity (collectively, the “ Merger ”) pursuant to the terms of the Merger Agreement (the Merger, together with the other transactions contemplated by the Merger Agreement and the related agreements, the “ Transactions ” or the “ business combination ”). A copy of the Merger Agreement is attached to this proxy statement/prospectus as Annex A, and CCIX encourages its shareholders to read it in its entirety. PlusAI stockholders are being asked, among other things, to consider and vote upon a proposal to approve and adopt the Merger Agreement and the related agreements to which CCIX is a party and to approve the Merger and the other Transactions (the “ business combination proposal ”). Please see the section entitled “ Proposal No. 1 — The Business Combination Proposal .”

This proxy statement/prospectus and its Annexes contain important information about the business combination proposal and the other matters and proposals to be acted upon at the extraordinary general meeting. You should read this proxy statement/prospectus and its Annexes carefully and in their entirety.

Your vote is important. You are encouraged to submit your proxy card as soon as possible after carefully reviewing this proxy statement/prospectus, its Annexes and the other documents referred to herein.

When and where is the extraordinary general meeting?

The extraordinary general meeting will be held via live webcast on , 2025 at a.m. Eastern Time. The extraordinary general meeting can be accessed by visiting , where you will be able to listen to the meeting live, ask questions and vote during the meeting. For the purposes of Cayman Islands law and the CCIX current articles of association, the physical location of the extraordinary general meeting will be Willkie Farr & Gallagher LLP at 787 Seventh Avenue, New York, New York 10019.

What are the proposals on which I am being asked to vote at the extraordinary general meeting?

CCIX shareholders will be asked to consider and vote on the following proposals at the extraordinary general meeting:

a proposal to approve by ordinary resolution the Merger Agreement and business combination — we refer to this proposal as the “ business combination proposal .”