Company: SSUP
Filing Date: 2025-07-30
Form Type: PREM14A
Source: 0001140361-25-027895
Chunk: 365

Company: SUPERIOR INDUSTRIES INTERNATIONAL INC
Filing Date: 2025-07-30
Form: PREM14A
Chunk 365
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 by all of the terms of the Agreement, a copy of which is attached to this Joinder Agreement as

#### Annex I
(as the same has been or may be hereafter amended, restated, or otherwise modified from time to time in accordance with the provisions thereof). Upon and after the Joinder Effective Time, the Joining Party shall be deemed to be “TPG” and a “Party” for all purposes under the Agreement and with respect to any and all Claims and Interests held by the Joining Party.

2. Joinder Effective Time . Prior to the Joinder Effective Time, the Joining Party (a) shall not be, and shall not be deemed to be, a “Party” for any purposes under the Agreement or with respect to any Claims or Interests held by the Joining Party and (b) shall not be bound by any of the terms of the Agreement.

3. Representations and Warranties . With respect to the Claims and Interests, including the number of shares of Existing Preferred Equity, set forth below its name on the signature page hereto, the Joining Party hereby makes, effective as of the Joinder Effective Time, the representations and warranties of TPG set forth in the Agreement to each other Party to the Agreement.

4. Governing Law . This Joinder Agreement shall be governed by and construed in accordance with the internal laws of the State of New York, without regard to any conflict of laws provisions that would require the application of the law of any other jurisdiction.

<div align='center'>[ Signature Page Follows ]

D-55</div>

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:                                                    |     | TPG Growth Gen Par III,          |
|                                                        |     | L.P., its general partner        |
| By:                                                    |     | TPG Growth Gen Par III Advisors, |
|                                                        |     | LLC, its general partner         |
| By:                                                    |     | /s/ Martin Davidson              |
| Name:                                                  |     | Martin Davidson                  |
| Title:                                                 |     | Chief Accounting Officer         |
| Claims:                                                |     | N/A                              |
| Number of Shares of Existing Preferred Equity: 150,000 |     |                                  |
| Other Interests: N/A                                   |     |                                  |
| Notice Address:                                        |