Company: AAOI
Filing Date: 2025-02-28
Form Type: 424B5
Source: 0001104659-25-019109
Chunk: 19

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-02-28
Form: 424B5
Chunk 19
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 incorporated by reference in this prospectus supplement and elsewhere in the registration statement of which the accompanying base prospectus forms a part have been so incorporated by reference in reliance upon the reports of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

### WHERE TO LEARN MORE ABOUT US
We have filed with the SEC a registration statement on Form S-3ASR under the Securities Act with respect to the securities being offered under this prospectus supplement. This prospectus supplement and the accompanying base prospectus, which forms part of the registration statement, do not contain all of the information in the registration statement. We have omitted certain parts of the registration statement, as permitted by the rules and regulations of the SEC. For further information regarding us and our securities, please see the registration statement and our other filings with the SEC, including our annual, quarterly, and current reports and any proxy statements. Our public filings with the SEC are available to the public on the SEC’s Internet website at http://www.sec.gov.

We furnish holders of our common stock with annual reports containing audited financial statements prepared in accordance with accounting principles generally accepted in the United States following the end of each fiscal year. We file reports and other information with the SEC pursuant to the reporting requirements of the Exchange Act. In addition, the reports, proxy statements and other information that we file with the SEC are available to you free of charge through the Investor Relations page of our website, http://ao-inc.com/, as soon as reasonably practicable after they have been electronically filed with, or furnished to, the SEC. We have included our website address as a textual reference and do not intend it as 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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### 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