EX-16.1 2 aaoi_1601.htm LETTER FROM GRANT THORNTON LLP

Exhibit 16.1

May 8, 2026

 

U.S. Securities and Exchange Commission

Office of the Chief Accountant

100 F Street, NE

Washington, DC 20549

 

 

Re: Applied Optoelectronics, Inc.
File No. 001-36083

 

Dear Sir or Madam:

 

We have read Item 4.01 of Form 8-K of Applied Optoelectronics, Inc. May 8, 2026, and agree with the statements concerning our Firm contained therein.

 

Very truly yours,

 

/s/ GRANT THORNTON LLP