MICROCHIP TECHNOLOGY INC

Director Resignation

On November 3, 2026, Victor Peng informed our Board of Directors (the "Board") of his decision to step down from the Board, effective as of that date, due to his time commitments on other matters including serving as Chief Executive Officer of PsiQuantum. Mr. Peng’s decision was not the result of any disagreement with the Company, its management, or the Board. The Board thanks Mr. Peng for his service and contributions during his tenure on the Board.

Recent Events - Cybersecurity

On September 1, 2026 and September 19, 2026, we detected unauthorized activity involving certain of our information technology systems. In each instance, we promptly activated our incident response process and engaged cybersecurity advisors to assist with containment, remediation and investigation. The incidents have not affected our ability to produce and ship products to customers. We have isolated certain systems as part of the containment measures and are working to restore affected systems and mitigate the impact of these incidents. Based on information currently available to us, while certain follow-up activities are still in process, our investigation has determined that as of the date of this quarterly report and given the response measures taken, we do not believe the incidents have materially affected, or may be reasonably likely to materially affect, our business, operations, or financial condition. We will continue to evaluate the incidents and their impact as the investigations progress.

Securities Trading Plans of Directors and Executive Officers

No officers or directors, as defined in Rule 16a-1(f), adopted orterminated a "Rule 10b5-1 trading arrangement" or a "non-Rule 10b5-1 trading arrangement," as defined in Item 408 of Regulation S-K, during the last fiscal quarter.