Company: SSUP
Filing Date: 2025-11-18
Form Type: NT 10-Q/A
Source: 0001193125-25-285425
Chunk: 0

Company: SUPERIOR INDUSTRIES INTERNATIONAL INC
Filing Date: 2025-11-18
Form: NT 10-Q/A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING Commission file number: 001-06615

| (Check One) |     | ☐  Form 10-K    ☐  Form 20-F    ☐  Form 11-K    ☒  Form 10-Q 
 ☐  Form 10-D    ☐  Form N-SAR    ☐  Form N-CSR               
 For Period Ended: September 30, 2025                         |
|:------------|:----|:-------------------------------------------------------------|
|             |     | ☐  Transition Report on Form 10-K                            |
|             |     | ☐  Transition Report on Form 20-F                            |
|             |     | ☐  Transition Report on Form 11-K                            |
|             |     | ☐  Transition Report on Form 10-Q                            |
|             |     | ☐  Transition Report on Form N-SAR                           |
|             |     | For the Transition Period Ended:                             |

| Nothing in this form shall be construed to imply that the Commission has verified any information contained herein. |

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates: PART I — REGISTRANT INFORMATION SUPERIOR INDUSTRIES INTERNATIONAL, INC. (Full Name of Registrant) (Former Name if Applicable) 26600 Telegraph Road, Suite 400 (Address of Principal Executive Office ( Street and Number )) Southfield, Michigan 48033 (City, State and Zip Code)

PART II — RULES 12b-25(b) AND (c) If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate)

| ☒ |    | -a |                                                                                                                                                                                                                                                                                                                                                                                                                                                                         | The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense; |
|   | -b |    | The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q