Company: AAOI
Filing Date: 2025-04-25
Form Type: 424B7
Source: 0001104659-25-039431
Chunk: 6

Company: APPLIED OPTOELECTRONICS, INC.
Filing Date: 2025-04-25
Form: 424B7
Chunk 6
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 in the State of Texas in 1997. In March 2013, Applied Optoelectronics, Inc., a Texas corporation, converted into a Delaware corporation. Prime World International Holdings, Ltd. (“Prime World”) is a wholly-owned subsidiary of the Company incorporated in the British Virgin Islands on January 13, 2006. Prime World is the parent company of Global Technology, Inc. (“Global”). Global was established in June 2002 in the People’s Republic of China (“PRC”) and was acquired by Prime World on March 30, 2006. Prime World also operates a division in Taiwan, which is qualified to do business in Taiwan and primarily manufactures transceivers and performs research and development activities.

Our principal executive offices are located at 13139 Jess Pirtle Blvd., Sugar Land, TX 77478, and our telephone number is (281) 295-1800. Our website address is www.ao-inc.com. Information contained on or otherwise accessible through our website is not incorporated by reference into this prospectus supplement or the accompanying prospectus, and you should not consider it a part of this prospectus supplement or the accompanying prospectus.

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#### The Offering
Common stock to be Offered by the Selling Securityholder

Up to 7,945,399 shares of our common stock issuable upon exercise of the warrant held by the selling securityholder. The exercise price, and therefore the number of shares of our common stock issuable to the selling securityholder upon exercise of the warrant, is subject to adjustment in certain circumstances. Accordingly, the number of shares of our common stock issuable with respect to the warrant may increase or decrease.

#### Use of Proceeds
We will not receive any proceeds from the sale of the shares of our common stock covered by this prospectus supplement.

#### Risk Factors
Investing in our common stock involves a high degree of risk. Prospective investors should carefully consider the matters discussed under the caption entitled “Risk Factors” on page S-4of this prospectus supplement and in the documents incorporated by reference herein, our future periodic reports as well as the other information contained or incorporated by reference in this prospectus supplement, before making a decision to invest in our common stock.

#### NASDAQ trading symbol
AAOI

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### RISK FACTORS
An investment in our securities involves a high degree of risk.