Company: AAOI
Filing Date: 2025-08-27
Form Type: 424B5
Source: 0001104659-25-084005
Chunk: 52

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-08-27
Form: 424B5
Chunk 52
---
 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 our website at http://ao-inc.com/ . Except for the specific incorporated documents listed above, no information available on or through our website shall be deemed to be incorporated in this prospectus or the registration statement of which it forms a part.

See also “Where to Learn More About Us.”

<div align='center'>19</div>

TABLE OF CONTENTS

<div align='center'>**$150,000,000**</div>

#### CommonStock

### PROSPECTUS SUPPLEMENT

### RAYMOND JAMESNEEDHAM & COMPANY
<div align='center'>August 27, 2025</div>