Company: CCIXW
Filing Date: 2025-12-05
Form Type: S-4/A
Source: 0001193125-25-309933
Chunk: 29

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-12-05
Form: S-4/A
Chunk 29
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 no later than the time of the extraordinary general meeting or, if the meeting is adjourned, the time for holding such adjourned meeting. If your CCIX Ordinary Shares are held in an account at a brokerage firm or bank, you must instruct your broker or bank on how to vote your shares or, if you wish to attend the extraordinary general meeting and vote, obtain a proxy card from your broker or bank. Your vote is important regardless of the number of CCIX Ordinary Shares you own. Whether you plan to attend the extraordinary general meeting or not, please sign, date and return the enclosed proxy card as soon as possible, and no later than the time of the extraordinary general meeting or, if the meeting is adjourned, the time for holding such adjourned meeting, in the envelope provided. If your CCIX Ordinary Shares are held in “street name” or are in a margin or similar account, you should contact your broker to ensure that votes related to the shares you beneficially own are properly counted. Thank you for your participation. We look forward to your continued support.

| By Order of the Board of Directors |
| Michael Klein                      |
| Chairman of the Board of Directors |

, 2025 IF YOU RETURN YOUR PROXY CARD WITHOUT AN INDICATION OF HOW YOU WISH TO VOTE, YOUR SHARES OF CCIX PUBLIC SHARES WILL BE VOTED AT THE DISCRETION OF YOUR PROXY. TO EXERCISE YOUR REDEMPTION RIGHTS, YOU MUST ELECT TO HAVE CCIX REDEEM YOUR CCIX PUBLIC SHARES FOR A PRO RATA PORTION OF THE FUNDS HELD IN THE TRUST ACCOUNT (NET OF PERMITTED WITHDRAWALS) AND TENDER SUCH SHARES TO CCIX’S TRANSFER AGENT AT LEAST TWO BUSINESS DAYS PRIOR TO THE INITIALLY SCHEDULED VOTE AT THE EXTRAORDINARY GENERAL MEETING. YOU MAY TENDER YOUR CCIX PUBLIC SHARES BY EITHER DELIVERING YOUR SHARE CERTIFICATE TO THE TRANSFER AGENT OR BY DELIVERING SUCH SHARES ELECTRONICALLY USING THE DEPOSITORY TRUST COMPANY’S DWAC (DEPOSIT AND WITHDRAWAL AT CUSTODIAN) SYSTEM. IF THE BUSINESS COMBINATION IS NOT COMPLETED, THEN SUCH CCIX PUBLIC SHARES WILL NOT BE REDEEMED FOR CASH. IF YOU HOLD CCIX PUBLIC SHARES IN STREET NAME, YOU WILL NEED TO INSTRUCT THE ACCOUNT EXECUTIVE AT YOUR BANK OR BROKER TO WITHDRAW SUCH SHARES FROM YOUR ACCOUNT IN ORDER TO EXERCISE YOUR