Company: SSUP
Filing Date: 2025-07-09
Form Type: DEFA14A
Source: 0001193125-25-157148
Chunk: 230

Company: SUPERIOR INDUSTRIES INTERNATIONAL INC
Filing Date: 2025-07-09
Form: DEFA14A
Chunk 230
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 Joining
Party shall hereafter be deemed to be a “Consenting Term Loan Lender” and a “Party” for all purposes under the Agreement and with respect to any and all Claims and Interests held by such Joining Party.

2. . With respect to the aggregate principal amount of the Term Loan Obligations set forth below its name
on the signature page hereto, the Joining Party hereby makes the representations and warranties of the Consenting Term Loan Lenders set forth in the Agreement to each other Party to the Agreement.

3. . 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.

[Signature Page Follows]

IN WITNESS WHEREOF, the Joining Party has caused this Joinder to be executed as of the date first written above.

| CONSENTING TERM LOAN LENDER |
| [•]                         |
| By:                         |
| Name:                       |
| Title:                      |

Principal Amount of Term Loan Obligations: $______________ Other Claims: $______________ Other Interests: $______________ Notice Address:

| Fax: |

| Attention: |

| Email: |

| Acknowledged:                          |
| SUPERIOR INDUSTRIES INTERNATIONAL, INC |
| By:                                    |
| Name:                                  |
| Title:                                 |

EXHIBIT C

TPG JOINDER AGREEMENT

This Joinder Agreement (“Joinder Agreement”) to the Recapitalization Support Agreement, dated as of
July 8, 2025 (as amended, supplemented, or otherwise modified from time to time, the “Agreement”), by and among the Company and certain holders of Term Loan Obligations (together with their respective successors and
permitted assigns, the “Consenting Term Loan Lenders” and each, a “Consenting Term Loan Lender”) is executed and delivered by TPG Growth III Sidewall, L.P. (the “Joining Party”)
as of July 8, 2025. Each capitalized term used herein but not otherwise defined shall have the meaning set forth in the Agreement.

1. . The Joining Party hereby agrees to be bound, effective immediately upon the termination of the Merger
Agreement (the “Joinder Effective Time”), by all of the terms of the Agreement, a copy of which is attached to this Joinder Agreement as AnnexI (