Company: CCIXW
Filing Date: 2025-12-05
Form Type: S-4/A
Source: 0001193125-25-309933
Chunk: 958

Company: Churchill Capital Corp IX/Cayman
Filing Date: 2025-12-05
Form: S-4/A
Chunk 958
---
 [***]                         |

| By: |          |                               |
|     | Name:    | William Sherman               |
|     | Address: | c/o Churchill Capital Corp IX |
|     |          | 640 Fifth Avenue, 12th Floor  |
|     |          | New York, NY 10019            |
|     | E‑mail:  | [***]                         |

| By: |          |                               |
|     | Name:    | Paul Lapping                  |
|     | Address: | c/o Churchill Capital Corp IX |
|     |          | 640 Fifth Avenue, 12th Floor  |
|     |          | New York, NY 10019            |
|     | E‑mail:  | [***]                         |

<div align='center'>[Signature Page to Sponsor Agreement]</div>

| Acknowledged and Agreed:  |        |                         |
| Churchill Capital Corp IX |        |                         |
| By:                       |        |                         |
|                           | Name:  | Jay Taragin             |
|                           | Title: | Chief Financial Officer |

<div align='center'>[Signature Page to Sponsor Agreement]</div>

Annex A

|                            | Founder Shares* | Vesting FounderShares | Private PlacementShares |
| Churchill Sponsor IX LLC** |       7,187,500 |             1,078,125 |                 725,000 |

* Includes SPAC Common Shares issued or issuable upon the conversion of the Founder Shares. ** Michael Klein may be deemed to beneficially own the Founder Shares and Private Placement Shares owned by Churchill Sponsor IX LLC.

<div align='center'>Annex A

EXHIBIT D

VOTING AND SUPPORT AGREEMENT</div>

ThisVOTING AND SUPPORT AGREEMENT(this “Agreement”) is being executed and delivered as of June [5], 2025, by and among the Person named on the signature page hereto (the “Stockholder”), Churchill Capital Corp IX, a Cayman Islands exempted company (which shall transfer by way of continuation and domesticate as a Delaware corporation) (“SPAC”), and Plus Automation, Inc., a Delaware corporation (the “Company”). For purposes of this Agreement, SPAC, the Company and the Stockholder are each a “Party” and collectively the “Parties.” Each capitalized term used and not otherwise defined herein has the meaning ascribed to such term in the Merger Agreement (as defined below).

<div align='center'>R E