Company: AAOI
Filing Date: 2025-04-25
Form Type: 424B7
Source: 0001104659-25-039431
Chunk: 1

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-04-25
Form: 424B7
Chunk 1
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 USE OF PROCEEDS                                      | ​ | ​ | ​    | ​ |  4 | ​ | ​ |
| DESCRIPTION OF SECURITIES TO BE OFFERED              | ​ | ​ | ​    | ​ |  4 | ​ | ​ |
| PLAN OF DISTRIBUTION                                 | ​ | ​ | ​    | ​ | 13 | ​ | ​ |
| LEGAL MATTERS                                        | ​ | ​ | ​    | ​ | 17 | ​ | ​ |
| EXPERTS                                              | ​ | ​ | ​    | ​ | 17 | ​ | ​ |
| WHERE TO LEARN MORE ABOUT US                         | ​ | ​ | ​    | ​ | 17 | ​ | ​ |
| INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE      | ​ | ​ | ​    | ​ | 18 | ​ | ​ |

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TABLE OF CONTENTS

### ABOUT THIS PROSPECTUS SUPPLEMENT
**This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of this offering and the securities offered hereby. The second part is the accompanying prospectus, which gives more general information about us and the securities that we may offer from time to time. This prospectus supplement also adds, updates and changes information contained in the accompanying prospectus. If there is any inconsistency between the information in this prospectus supplement and the accompanying prospectus, you should rely on the information in this prospectus supplement. This prospectus supplement, the accompanying prospectus and the documents incorporated into each by reference include important information about us, the common stock being offered and other information you should know before investing. You should read this prospectus supplement and the accompanying prospectus together with the additional information described under the heading, “Where You Can Find More Information” before investing in our common stock.

Any statement in this prospectus supplement or in a document incorporated or deemed to be incorporated by reference in this prospectus supplement will be deemed to be modified or superseded for purposes of this prospectus supplement to the extent that a statement contained herein or in any other subsequently filed document that is also incorporated or deemed incorporated by reference in this prospectus supplement modifies or supersedes that statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus supplement. See “Incorporation of Certain Documents by Reference” in this prospectus supplement.

In this prospectus supplement and the accompanying