Company: SSUP
Filing Date: 2025-07-09
Form Type: DEFA14A
Source: 0001193125-25-157148
Chunk: 126

Company: SUPERIOR INDUSTRIES INTERNATIONAL INC
Filing Date: 2025-07-09
Form: DEFA14A
Chunk 126
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 more counterparts have been signed by each of the parties hereto
and delivered to the other parties hereto, it being understood that all parties hereto need not sign the same counterpart. Any such counterpart, to the extent delivered by electronic delivery, will be treated in all manners and respects as an
original executed counterpart and will be considered to have the same binding legal effect as if it were the original signed version thereof delivered in person. No party hereto may raise the use of an electronic delivery to deliver a signature, or
the fact that any signature or agreement or instrument was transmitted or communicated through the use of an electronic delivery, as a defense to the formation of a contract, and each party hereto forever waives any such defense, except to the
extent such defense relates to lack of authenticity.

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20. . This Agreement may be amended by the parties hereto, and
the terms and conditions hereof may be waived, only by an instrument in writing signed on behalf of each of the parties hereto, or, in the case of a waiver, by an instrument signed on behalf of the party waiving compliance.

21. . Nothing contained in this Agreement shall be deemed to vest in the Company any direct or indirect
ownership or incidence of ownership of or with respect to any of the Owned Shares. All ownership and economic benefits of and relating to the Owned Shares shall remain vested in and belong to the Stockholder, and, except as otherwise provided
herein, the Company shall have no authority to direct the Stockholder in the voting or disposition of any of the Owned Shares.

[Signature pages follow]

-12-

IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed and delivered on the date and year first above written.

| 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       |

[Signature Page to Voting and Support Agreement]

IN WITNESS WHEREOF, the parties have caused this Agreement to be duly executed and delivered on the date and year first above written.

| SUPERIOR