Wellington Management Group LLP Acquires 6.0% Stake in Power Integrations, Inc. (POWI)

On May 15, 2026, Wellington Management Group LLP and its affiliated entities filed a Schedule 13G with the SEC, reporting a new significant ownership stake in Power Integrations, Inc. (POWI). As of the event date on March 31, 2026, the group beneficially owns 3,356,153 shares of common stock, representing 6.0% of the company's outstanding shares. The filing was made jointly by Wellington Management Group LLP, Wellington Group Holdings LLP, Wellington Investment Advisors Holdings LLP, and Wellington Management Company LLP. The reported shares are held of record by various clients of the investment advisers under the Wellington umbrella. Wellington Management Group LLP serves as the parent holding company, with Matthew Revell signing as Compliance Manager. The filing indicates that the shares were acquired in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. This position represents a significant increase from a previously reported 0.0% stake, marking a new substantial institutional investment in the semiconductor company.