Company: CCIXW
Filing Date: 2025-12-05
Form Type: S-4/A
Source: 0001193125-25-309933
Chunk: 79

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-12-05
Form: S-4/A
Chunk 79
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 will not consummate the business combination.

What will happen if I sign and return my proxy card without indicating how I wish to vote?

Signed and dated proxies received by us without an indication of how a CCIX shareholder intends to vote on a proposal will be voted at the discretion of the proxyholder. If you return a signed proxy card without appointing a proxyholder, you will be deemed to have appointed the chairman of the extraordinary general meeting as your proxy, who intends to vote "FOR" each proposal unless otherwise directed.

What should I do if I receive more than one set of voting materials?

CCIX shareholders may receive more than one set of voting materials, including multiple copies of this proxy statement/prospectus and multiple proxy cards or voting instruction cards. For example, if you hold your CCIX Ordinary Shares in more than one brokerage account, you will receive a separate voting instruction card for each brokerage account in which you hold shares. If you are a holder of record and your CCIX Ordinary Shares are registered in more than one name, you will receive more than one proxy card. Please complete, sign, date and return each proxy card and voting instruction card that you receive in order to cast a vote with respect to all of your CCIX Ordinary Shares.

Who can help answer my questions?

If you have questions about the business combination or if you need additional copies of the proxy statement/prospectus or the enclosed proxy card you should contact:

<div align='center'>Churchill Capital Corp IX

640 Fifth Avenue, 14th Floor

New York, NY 10019

Attention: Jay Taragin, Chief Financial Officer

Email:info@churchillcapitalcorp.com

or:

Morrow Sodali LLC

333 Ludlow Street, 5th Floor, South Tower

Stamford, CT 06902

Call Toll-Free: (800) 662-5200 or (203) 658-9400

Email: ALCC.info@investor.morrowsodali.com</div>

To obtain timely delivery, our shareholders must request any additional materials no later than five business days prior to the extraordinary general meeting. You may also obtain additional information about CCIX from documents filed with the SEC by following the instructions in the section entitled “Where You Can Find More Information.” If you are an eligible holder of CCIX public shares and you intend to seek redemption of your

<div align='center'>31</div>

shares, you will need to deliver your stock (either physically or electronically) to CCIX