Item 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934), as of March 31, 2023. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of March 31, 2023.

Changes in Internal Control Over Financial Reporting

During the quarter ended March 31, 2023, there were no changes in our internal control over financial reporting that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

There have been no material developments in our legal proceedings since we filed our Annual Report on Form 10-K for the fiscal year ended September 30, 2022. Refer to “Part I. Item 3. Legal Proceedings” in our Annual Report on Form 10-K for the fiscal year ended September 30, 2022 for additional information regarding legal proceedings.

Environmental Matter

The following information is reported in accordance with Item 103 of Regulation S-K:

During fiscal 2021, we determined that the Silicon Microstructures, Inc. (“SMI”) manufacturing site in Milpitas, California historically miscalculated and inaccurately reported its sulfur hexafluoride (SF6) emissions prior to our acquisition of SMI. The site voluntarily disclosed the matter to the applicable state and local authorities, and in fiscal 2022, we received approval and installed new air abatement equipment at the site. In connection with an inspection of the air abatement equipment and an unrelated hazardous materials inspection during the quarter ended March 31, 2023, the local environmental authorities identified additional environmental deficiencies at the site. We are in the process of thoroughly investigating these matters with the intent to fully cooperate with the authorities to ensure a satisfactory resolution of these matters. We may face monetary sanctions, although we do not anticipate such claims will have a material adverse effect on our results of operations, financial position, or cash flows.