Company: SSUP
Filing Date: 2025-07-09
Form Type: DEFA14A
Source: 0001193125-25-157148
Chunk: 110

Company: SUPERIOR INDUSTRIES INTERNATIONAL INC
Filing Date: 2025-07-09
Form: DEFA14A
Chunk 110
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: President                             |
| SUP MERGER SUB, INC.                    |     |                                              |
| By:                                     |     | /s/ Robert LaRoche                           |
|                                         |     | Name: Robert LaRoche                         |
|                                         |     | Title: President                             |

[ Signature Page to Agreement and Plan of Merger]

Exhibit 10.1

Execution Version

VOTING AND SUPPORT AGREEMENT

This Voting and Support Agreement (this “”), dated as of July 8, 2025, is entered into by and between Superior
Industries International, Inc., a Delaware corporation (the “”), and TPG Growth III Sidewall, L.P., a Texas Limited Partnership (the “”). Capitalized terms used but not defined herein shall
have the meanings given to them in the Merger Agreement (as defined below).

RECITALS

WHEREAS, concurrently with the execution and delivery of this Agreement, (i) the Company, (ii) SUP Parent Holdings, LLC, a Delaware
limited liability company (“”), and (iii) SUP Merger Sub, Inc., a Delaware corporation and a direct wholly owned Subsidiary of Parent (“”), have entered into an Agreement and Plan of Merger (as
it may be amended from time to time, the “”), which provides, among other things, for the merger of Merger Sub with and into the Company (the “”), with the Company surviving the Merger as
a wholly owned subsidiary of Parent; and

WHEREAS, as of the date hereof, the Stockholder is the record and/or “beneficial
owner” (within the meaning of Rule 13d-3 under the Exchange Act) of zero shares of common stock, par value $0.01 per share, of the Company (the “”) and 150,000 shares of
preferred stock, par value $0.01 per share (the “”), being all of the shares of Common Stock and Preferred Stock owned of record or beneficially by the Stockholder as of the date hereof (the “”).

NOW, THEREFORE, in consideration of the foregoing and the mutual covenants and agreements herein contained, and
intending to be legally bound hereby, the Stockholder and the Company hereby agree as follows:

1. .

1.1 From and after the date hereof until the Outside Date (as defined below), at any meeting of the Company’s
stockholders, including any postponement, recess or adjournment thereof,