{"url_path":"/sec/aaoi/8-k/2026-05-08/body","section_key":"body","section_title":"Body","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-05-08","source_url":"https://www.sec.gov/Archives/edgar/data/1158114/0001683168-26-003572-index.html","accession_number":"0001683168-26-003572","cik":"0001158114","ticker":"AAOI","issuer_name":"APPLIED OPTOELECTRONICS, INC.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1158114/0001683168-26-003572-index.html","primary_entity_key":"0001158114","primary_entity_name":"APPLIED OPTOELECTRONICS, INC."},"word_count":73,"has_tables":true,"body_markdown":"EX-16.1\n2\naaoi_1601.htm\nLETTER FROM GRANT THORNTON LLP\n\n**Exhibit 16.1**\n\nMay 8, 2026\n\nU.S. Securities and Exchange Commission\n\nOffice of the Chief Accountant\n\n100 F Street, NE\n\nWashington, DC 20549\n\nRe:\nApplied Optoelectronics, Inc.\n\nFile No. 001-36083\n\nDear Sir or Madam:\n\nWe have read Item 4.01 of Form 8-K of Applied Optoelectronics, Inc.\nMay 8, 2026, and agree with the statements concerning our Firm contained therein.\n\nVery truly yours,\n\n/s/ GRANT THORNTON LLP"}