Company: SSUP
Filing Date: 2025-08-15
Form Type: DEFM14A
Source: 0001140361-25-031532
Chunk: 365

Company: SUPERIOR INDUSTRIES INTERNATIONAL INC
Filing Date: 2025-08-15
Form: DEFM14A
Chunk 365
---
 By:                                    |
| Name:                                  |
| Title:                                 |

D-56

TABLE OF CONTENTS

IN WITNESS WHEREOF, the Joining Party has caused this Joinder to be executed as of the date first written above. TPG Growth III Sidewall, L.P.

| By:                                            |
| Name:                                          |
| Title:                                         |
| Claims:                                        |
| Number of Shares of Existing Preferred Equity: |
| Other Interests:                               |
| Notice Address:                                |
| Fax:                                           |
| Attention:                                     |
| Email:                                         |

| Acknowledged:                           |     |                                                                                |
| SUPERIOR INDUSTRIES INTERNATIONAL, INC. |     |                                                                                |
| By:                                     |     | /s/ David Sherbin                                                              |
| Name:                                   |     | David Sherbin                                                                  |
| Title:                                  |     | Senior Vice President, General Counsel, Secretary and Chief Compliance Officer |

D-57

#### TABLE OF CONTENTS

### EXHIBIT D

### MERGER AGREEMENT
<div align='center'>D-58</div>

#### TABLE OF CONTENTS

### EXHIBIT E

### GOVERNANCE TERM SHEET
<div align='center'>D-59</div>

#### TABLE OF CONTENTS

#### Annex E

### EXECUTION VERSION

### SUBSCRIPTION AGREEMENT
SUBSCRIPTION AGREEMENT, dated as of July 8, 2025 (this “ Agreement ”), by and between Superior Industries International, Inc., a Delaware corporation (the “ Company ”), and SUP Parent Holdings, LLC, a Delaware limited liability company (the “ Purchaser ”). Capitalized terms used but not defined herein shall have the meanings given to them in the Merger Agreement (as defined below).

WHEREAS, the Company, Purchaser and SUP Merger Sub, Inc. (“ Merger Sub ”) have entered into that certain Agreement and Plan of Merger, dated on or about the date hereof (the “ Merger Agreement ”), pursuant to which the Company shall merge with and into Merger Sub, with the Company surviving as a wholly owned subsidiary of the Purchaser (the “ Merger ”).

WHEREAS, prior to consummation of the Merger, the Purchaser desires to acquire from the Company, and the Company desires to issue and sell to the Purchaser, the number of shares of common stock, $0.01 par value per share, of the Company (the “ Common Stock ”) set forth in