UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 12, 2025

Applied Optoelectronics, Inc.

(Exact name of registrant as specified in its charter)

13139 Jess Pirtle Blvd.
Sugar Land, Texas 77478

(Address of principal executive offices and zip code)

(281) 295-1800

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

On June 12, 2025, Global Technology, Inc. (“Global Technology”), a wholly owned subsidiary of Applied Optoelectronics, Inc. entered into a one-year credit facility totaling 96,800,000 RMB (the “Credit Facility”), with China Construction Bank, in Ningbo City, China ( the “CCB Bank”). Borrowing under the Credit Facility will be used to repay the Company’s outstanding loans with Shanghai Pudong Development Bank Co., Ltd.

Borrowing under the Credit Facility will mature on June 16, 2026 and will bear interest equal to the Bank’s published twelve (12) month prime loan rate, minus 0.05%. As of the execution of the Credit Facility agreement, the Bank’s published 12 months prime loan rate is 3%. Under the Credit Facility, Global Technology will make monthly payments of accrued interest; principal shall be repaid upon maturity.

Global Technology’s obligations under the Credit Facility is unsecured. The agreement for the Credit Facility also contains rights and obligations, representations and warranties, and events of default applicable to the Company that are customary for agreements of this type.

The foregoing description of the Credit Facility do not purport to be a complete statement of the parties’ rights and obligations under the agreements and is qualified in its entirety by reference to the translation of the full text of the RMB Working Capital Loan Contract which is attached as Exhibit 10.1 to this Current Report on Form 8-K and are incorporated by reference herein.

On June 18, 2025, Global Technology used the Credit Facility to repay certain amounts outstanding under its 5-year revolving credit line with Shanghai Pudong Development Bank Co., Ltd. (the “SPD Credit Line”), entered into on May 24, 2024.

Under the SPD Credit Line, the Company was allowed up to 170,000,000 RMB of borrowing capability for general corporate and capital investment purposes. Global Technology repaid the outstanding balances of 96,800,000 RMB in working capital loans and 22,713,600 RMB in acceptance bills under the SPD Credit Line. Upon repayment, Global Technology terminated the agreements associated with the SPD Credit Line. There were no penalties associated with either of the above mentioned early payments.

The information contained in Item 1.01 of this Current Report on Form 8-K with respect to the Amendment is incorporated by reference herein and made a part hereof.

(d) Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.