Company: CCIXW
Filing Date: 2025-11-24
Form Type: DEF 14A
Source: 0001193125-25-293828
Chunk: 29

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-11-24
Form: DEF 14A
Chunk 29
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 a “Proxy”; collectively, the “Proxies”) as
proxies, each with full power to act without the other and the power to appoint a substitute to vote the shares that the undersigned is entitled to vote (the “Shares”) at the Annual General Meeting of shareholders of Churchill Capital
Corp IX (“Churchill”) to be held on December 19, 2025 at 9:00 a.m., Eastern time, and at any adjournments and/or postponements thereof. Such Shares shall be voted as indicated with respect to the proposals listed on the reverse side
hereof and in each Proxy’s discretion on such other matters as may properly come before the Annual General Meeting or any adjournment or postponement thereof.

The undersigned acknowledges receipt of the accompanying proxy statement and revokes all prior proxies for said meeting.

THE SHARES REPRESENTED BY THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN BY THE UNDERSIGNED SHAREHOLDER. IF NO SPECIFIC DIRECTION IS GIVEN AS TO THE PROPOSAL ON THE REVERSE SIDE, THIS PROXY WILL BE VOTED FOR PROPOSAL NO. 1. PLEASE MARK, SIGN, DATE AND RETURN THE PROXY CARD PROMPTLY.

(Continued and to be marked, dated and signed on reverse side)