Company: AAOI
Filing Date: 2025-08-27
Form Type: 424B5
Source: 0001104659-25-084005
Chunk: 16

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-08-27
Form: 424B5
Chunk 16
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 June 30, 2025, after giving effect to this offering | ​ | ​ | ​ | $ |  8.32 | ​ | ​ |
| ​ | Dilution per share to new investors purchasing shares in this offering                               | ​ | ​ | ​ | $ | 16.75 | ​ | ​ |

The table above assumes for illustrative purposes that an aggregate of 5,983,247 shares of our common stock are sold at a price of $25.07 per share, the last reported sale price of our common stock on The Nasdaq Global Market on August 26, 2025, for aggregate gross proceeds of approximately $150,000,000. The shares sold in this offering, if any, will be sold from time to time at various prices. The foregoing discussion and table do not take into account further dilution to new investors that could occur upon the exercise of outstanding stock options or warrants having a per share exercise price less than the per share offering price to the public in this offering. In addition, we may choose to raise additional capital due to market conditions or strategic considerations even if we believe we have sufficient funds for our current or future operating plans. To the extent that additional capital is raised through the sale of equity or equity-linked securities, the issuance of these securities could result in further dilution to our stockholders. The table and discussion above are based on 62,366,480 shares outstanding as of August 26, 2025 and excludes, as of that date, the following: • restricted stock units representing a total of 1,758,642 shares of common stock issuable upon vesting; • performance stock units representing a total of 1,188,826 shares of common stock issuable upon the satisfaction of performance-based vesting conditions that were outstanding as of August 26, 2025; • any shares issuable upon conversion of our 2.75% Convertible Senior Notes due 2030; and • any shares issuable upon exercise of warrants issued to Amazon.com, Inc.

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TABLE OF CONTENTS

### PLAN OF DISTRIBUTION
We have entered into a sales agreement with the Agents under which we may issue and sell shares of our common stock from time to time through them acting as agents. We may issue and sell shares through this prospectus supplement having an aggregate gross sales price of up to $150,000,000. The following summary of the material provisions of the sales agreement does not purport to be a complete statement