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Form 8-K · Current Report · Filed 2026-05-08

Applied Optoelectronics Dismisses Grant Thornton and Appoints PwC as New Auditor

Applied Optoelectronics, Inc. has dismissed its independent registered public accounting firm, Grant Thornton LLP, and appointed PricewaterhouseCoopers LLP (PwC) as its new auditor for the fiscal year ending December 31, 2026. The decision followed a competitive selection process by the Audit Committee. Grant Thornton's dismissal does not affect its engagement for the quarter ending March 31, 2026. There were no disagreements with Grant Thornton on accounting principles or practices during the fiscal years ended December 31, 2025 and 2024, and the subsequent interim period through May 4, 2026. The company did not consult with PwC regarding accounting matters prior to the appointment.

Filer
Applied Optoelectronics Inc. AAOI · NASDAQ
Filed
Accession
0001683168-26-003572
CIK
0001158114
Signal
Low impactTechnology

Items reported

Item events

Reported Item

Auditor Dismissed New Auditor Appointed

Market reaction

Close before filing

$157.55

Next session

+17.4%

Since filing

-40.1%

Latest close

$94.32

What happened, not what will happen — closing prices around the filing date.

Precedent

Previous filings from AAOI reporting the same item, with the next session's move:

Insider tape

Within 45 days of this filing, AAOI insiders reported 44 Form 4 transactions — net selling of $151.7M.

Full AAOI insider history →

About Applied Optoelectronics Inc.

Applied Optoelectronics Inc. is a prominent developer and manufacturer of optical communications products. The primary function of the company is to supply advanced optical components, modules, and equipment that are essential for high-speed communication networks. Applied Optoelectronics serves several key industries, including internet data centers, broadband service providers, and telecommunications. Their product offerings are critical in supporting increased data transmission rates demanded by these sectors. Noteworthy features of this company include its focus on vertically integrated manufacturing processes, which allow for greater control over production quality and cost. It extensively employs its semiconductor technology to produce lasers, detectors, and transceiver modules. This integration is vital for delivering cost-effective and reliable solutions that are foundational to the infrastructure of modern data communication systems. In the financial market, Applied Optoelectronics Inc. holds a significant role due to its contribution to the increasing demand for fast and efficient data services. As technology continues to advance and data consumption grows, the products offered by Applied Optoelectronics are essential for supporting global communication networks, thereby underscoring its importance in the optical networking industry.

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