Company: AAOI
Filing Date: 2025-05-28
Form Type: 424B5
Source: 0001104659-25-053547
Chunk: 20

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-05-28
Form: 424B5
Chunk 20
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 an active link to our website. The contents of our website are not part of this prospectus, and you should not consider the contents of our website in making an investment decision with respect to our securities.

Descriptions in this prospectus of documents are intended to be summaries of the material, relevant portions of those documents, but may not be complete descriptions of those documents. For complete copies of those documents, please refer to the exhibits to the registration statement and other documents filed by us with the SEC.

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TABLE OF CONTENTS

### INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
The SEC allows us to “incorporate by reference” into this prospectus supplement the documents we file with them, which means that we can disclose important information to you by referring you to those documents. The information that we incorporate by reference into this prospectus supplement is considered to be part of this prospectus supplement, and information that we file later with the SEC automatically updates and supersedes any information in this prospectus supplement. We have filed the following documents with the SEC. These documents are incorporated by reference as of their respective dates of filing, as well as any future documents (excluding information furnished pursuant to Items 2.02 and 7.01 of Form 8-K) we file with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, subsequent to the date of this prospectus supplement and prior to the termination of the offering:

1.

Our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as filed with the SEC on February 28, 2025;

2.

The portions of our Definitive Proxy Statement incorporated by reference into our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 , for the 2025 Annual Meeting of Stockholders to be held on June 12, 2025, as filed with the SEC on April 28, 2025 ;

3.

Our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2025, as filed with the SEC on May 8, 2025;

4.

Our Current Reports on Form 8-K as filed with the SEC on February 28, 2025 , March 13, 2025 , April 2, 2025 , April 9, 2025 , April 10,