Company: AAOI
Filing Date: 2025-04-25
Form Type: 424B7
Source: 0001104659-25-039431
Chunk: 15

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-04-25
Form: 424B7
Chunk 15
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 2, 2025, April 9, 2025and April 10, 2025(except that, with respect to each of the foregoing Current Reports, any portions thereof which are furnished and not filed shall not be deemed incorporated by reference into this prospectus supplement);

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the portions of our proxy statements related to the 2025 annual meeting of stockholders to be filed with the SEC, that will be incorporated by reference into our Annual Report on Form 10-K for the fiscal year ended December 31, 2024;and

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the description of our common stock contained in the “Description of Company’s Common Stock” filed as Exhibit 4.7to our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, filed with the SEC on February 23, 2024, including any amendment or reports filed for the purpose of updating such description.

All documents that we file (but not those that we furnish) with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (i) after the date of the initial filing of the registration statement of which this prospectus supplement is a part and prior to effectiveness of the registration statement and (ii) on or after the date of this prospectus supplement and prior to the termination of the offering of shares of

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our common stock hereby will be deemed to be incorporated by reference into this prospectus supplement and will automatically update and supersede the information in this prospectus supplement and any previously filed document.

Nothing in this registration statement shall be deemed to incorporate information furnished but not filed with the SEC pursuant to Item 2.02 or Item 7.01 of Form 8-K.

We will provide, without charge, upon written or oral request of any person to whom a copy of this prospectus is delivered, a copy of any or all of the foregoing documents and information that has been or may be incorporated in this prospectus by reference, other than exhibits to such documents. Requests for such documents and information should be directed to:

<div align='center'>Applied Optoelectronics, Inc. 
 Attn: Dr. Stefan Murry, Chief Financial Officer 
 13139 Jess Pirtle Blvd. 
 Sugar Land, TX 77478 
 (281) 295-1800</div>

You may also access the documents incorporated by reference in this prospectus through