Senior Vice President — Sunil Gupta: Senior Vice President resigned effective in two weeks with no stated disagreement, indicating a standard voluntary departure rather than a crisis or promotion.

of this Current Report on Form 8-K (including Exhibit 99.1) is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

Senior Vice President, Worldwide Sales — Mike Balow: The company hired a new Senior Vice President, Worldwide Sales with extensive industry experience.

Results of Operations and Financial Condition. On May 7, 2026 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Results of Operations and Financial Condition. On February 5, 2026 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Costs Associated with Exit or Disposal Activities. On February 1, 2026, the Board of Directors of the Company approved a reduction in force that resulted in the termination of approximately 7% of the Company’s global workforce on February 2, 2026 in order to decrease the Company’s costs and create a more efficient organization to support its business. In connection with the reduction in force, the Company estimates it will incur between approximately $3.5 million and $4.0 million of costs, su…

Entry into a Material Definitive Agreement. On February 2, 2026, the Board of Directors (the “Board”) of Power Integrations, Inc. (the “Company”) approved a revised form of indemnification agreement (the “Indemnification Agreement”) to be entered into between the Company and each of its directors and officers. The new form Indemnification Agreement supersedes the Company’s previous form of indemnification agreement. The Indemnification Agreement provides, among other things, that the Company…

The filing describes an amendment to the equity award plan, which is a non-management event.

CFO — Nancy Erba: The filing announces the appointment of an external candidate as the new Chief Financial Officer, which is a significant management change but not a departure of a sitting executive.

Results of Operations and Financial Condition. On November 5, 2025 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

CFO — Sandeep Nayyar: The CFO resigned but an internal successor was immediately appointed, indicating an orderly transition rather than a sudden loss of leadership.

Results of Operations and Financial Condition. On August 6, 2025 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

CEO — Balu Balakrishnan: The CEO is transitioning to Executive Chairman with a named successor, representing an orderly succession rather than a sudden loss of leadership.

Results of Operations and Financial Condition. On May 12, 2025 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Results of Operations and Financial Condition. On February 6, 2025 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Results of Operations and Financial Condition. On November 6, 2024 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Vice President of Worldwide Sales — Yang Chiah Yee: The departure of a VP-level executive is offset by the immediate internal promotion of a long-tenured senior director to succeed him, indicating an orderly transition rather than a sudden loss of leadership.

Results of Operations and Financial Condition. On August 6, 2024 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Results of Operations and Financial Condition. On May 7, 2024 the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.