Company: CCIXW
Filing Date: 2025-11-24
Form Type: DEF 14A
Source: 0001193125-25-293828
Chunk: 10

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-11-24
Form: DEF 14A
Chunk 10
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 this Proxy Statement entitled “ Beneficial Ownership of Securities” for information about the holdings of our Sponsor, directors and officers. Is my vote kept confidential? Proxies, ballots and voting tabulations identifying shareholders are kept confidential and will not be disclosed, except as may be necessary to meet legal requirements. How are votes counted? Votes will be counted by the inspector of election appointed for the Meeting, who will separately count “FOR” and “AGAINST” votes, “ABSTAIN” and Broker Non-Votesfor the Auditor Ratification Proposal. The approval of the Auditor Ratification Proposal requires an ordinary resolution under Cayman Islands law, being the affirmative vote of a simple majority of the votes cast by the holders of the Ordinary Shares present in person (including shareholders who vote online) or represented by proxy at the Meeting, or any adjournment thereof, and entitled to vote on such matter. At the Meeting, only those votes that are actually cast, either “FOR” or “AGAINST”, the Auditor Ratification Proposal will be counted for the purposes of determining whether the Auditor Ratification Proposal is approved, and any Ordinary Shares that are not voted at the Meeting will have no effect on the outcome of such vote. Abstentions and Broker Non-Votes,while considered present for the purposes of establishing a Quorum, will not count as votes cast and will have no effect on the outcome of the vote on the Auditor Ratification Proposal. See the question below entitled “ Will my shares be voted if I do not provide my proxy?”for more information about Broker Non-Votes. What is the difference between a Shareholder of Record and a Beneficial Owner of shares held in Street Name?

| • |     | Shareholder of Record: Shares Registered in Your Name. If on the Record Date your shares were                  
 registered directly in your name with our transfer agent, Continental, then you are a “Shareholder of Record”. |

| • |     | Beneficial Owner: Shares Registered in the Name of a Broker or Bank. If on the Record Date your                                                                                                                    
 shares were held in an account at a brokerage firm, bank, dealer, or other similar organization, then you are the “Beneficial Owner” of shares held in “Street Name” and these proxy materials are being forwarded 
 to you by that organization.                                                                                                                                                                                       |

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How can I vote if I am a Shareholder of Record? If you were a Shareholder of Record of Ordinary Shares on the Record Date, with respect to the Auditor Ratification Proposal:

| •