Company: CCIXW
Filing Date: 2025-12-05
Form Type: S-4/A
Source: 0001193125-25-309933
Chunk: 1109

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-12-05
Form: S-4/A
Chunk 1109
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ary of the Company.

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D-18</div>

Annex E

<div align='center'>PLUSAI HOLDINGS, INC.

2025 EMPLOYEE STOCK PURCHASE PLAN</div>

Purpose . The purpose of this Plan is to provide employees of the Company and its Designated Companies with an opportunity to purchase Common Stock through accumulated Contributions. The Company intends for this Plan to have two components: a component that is intended to qualify as an “employee stock purchase plan” under Code Section 423 (the “ 423 Component ”) and a component that is not intended to qualify as an “employee stock purchase plan” under Code Section 423 (the “ Non‑423 Component ”). The provisions of the 423 Component, accordingly, will be construed so as to extend and limit Plan participation in a uniform and nondiscriminatory basis consistent with the requirements of Code Section 423 . In addition, this Plan authorizes the grant of an option to purchase shares of Common Stock under the Non‑423 Component that does not qualify as an “employee stock purchase plan” under Code Section 423 ; an option granted under the Non‑423 Component will provide for substantially the same benefits as an option granted under the 423 Component, except that a Non‑423 Component option may include features necessary to comply with applicable non‑U.S. laws pursuant to rules, procedures or sub‑plans adopted by the Administrator. Except as otherwise provided herein or by the Administrator, the Non‑423 Component will operate and be administered in the same manner as the 423 Component.

Definitions .

“ Administrator ” means the Board or any Committee designated by the Board to administer this Plan pursuant to Section 4.

“ Applicable Laws ” means the legal and regulatory requirements relating to the administration of equity‑based awards, including but not limited to the related issuance of shares of Common Stock, including but not limited to, under U.S. federal and state corporate laws, U.S. federal and state securities laws, the Code, any stock exchange or quotation system on which the Common Stock is listed or quoted and the applicable laws of any non‑U.S. country or jurisdiction where options are, or will be, granted under this Plan.

“ Board ” means the Board of Directors of the Company.

“ Change in Control ” means the occurrence of any of the following events:

Change in Ownership of the Company . A change in the ownership of the Company which occurs on the date that any one person, or more than one person acting as a group (“