BlackRock Portfolio Management LLC Reports 3.2% Stake in WPP plc

On April 30, 2026, BlackRock Portfolio Management LLC filed a Schedule 13G/A reporting a new position in WPP plc. As of the event date of March 31, 2026, the filer beneficially owns 34,674,236 shares of common stock, representing a 3.2% ownership stake in the company. This filing marks an increase from a previous reported position of zero shares. The filing indicates that BlackRock Portfolio Management LLC holds sole voting power over 29,274,062 shares and sole dispositive power over the full 34,674,236 shares. The securities were acquired in the ordinary course of business and are not held for the purpose of influencing or changing the control of the issuer. Various persons associated with the reporting business units have the right to receive dividends or proceeds from the sale of the stock, though no single individual's interest exceeds 5% of the total outstanding shares. The reporting entity is classified as a parent holding company/control person under Rule 13d-1(b).