Company: CCIXW
Filing Date: 2025-12-05
Form Type: S-4/A
Source: 0001193125-25-309933
Chunk: 1137

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-12-05
Form: S-4/A
Chunk 1137
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 in part, the remaining provisions nevertheless will be binding and enforceable. 12. Notwithstanding any provisions in this Subscription Agreement, I understand that if I am working or resident in a country other than the United States, my participation in the Plan also will be subject to the additional terms and conditions set forth on Appendix A and any special terms and conditions for my country set forth on Appendix A . Moreover, if I relocate to one of the countries included in Appendix A , the special terms and conditions for such country will apply to me to the extent the Company determines that the application of such terms and conditions is necessary or advisable for legal or administrative reasons. Appendix A constitutes part of this Subscription Agreement and the provisions of this Subscription Agreement govern such Appendix (to the extent not superseded or supplemented by the terms and conditions set forth therein). 13. I hereby agree to be bound by the terms of the Plan. The effectiveness of this Subscription Agreement is dependent upon my eligibility to participate in the Plan.

| Employee’s Social           |
| Security Number             |
| (for U.S.‑based employees): |
| Employee’s Address:         |

I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT WILL REMAIN IN EFFECT THROUGHOUT SUCCESSIVE OFFERING PERIODS UNLESS TERMINATED BY ME.

| Dated: |     |                       |
|        |     | Signature of Employee |

<div align='center'>E-18</div>

EXHIBIT B PLUSAI HOLDINGS, INC. 2025 EMPLOYEE STOCK PURCHASE PLAN NOTICE OF WITHDRAWAL The undersigned Participant in the Offering Period of the PlusAI Holdings, Inc. 2025 Employee Stock Purchase Plan (the “ Plan ”) that began on ____________, ______ (the “ Offering Date ”) hereby notifies the Company that he or she hereby withdraws from the Offering Period. He or she hereby directs the Company to pay to the undersigned as promptly as practicable all the payroll deductions credited to his or her account with respect to such Offering Period. The undersigned understands and agrees that his or her option for such Offering Period will be terminated automatically. The undersigned understands further that no further payroll deductions will be made for the purchase of shares in the current Offering Period and the undersigned will be eligible to participate in succeeding Offering Periods only by delivering to the Company a new Subscription Agreement. Capitalized terms not otherwise defined herein will have the meaning ascribed to them under the Plan.

| Name and Address of Participant: |
| Signature:                       |
| Date: