Vanguard Portfolio Management Reports 8.31% Stake in Rapid7 Inc (RPD) via Schedule 13G/A

On April 29, 2026, Vanguard Portfolio Management LLC filed a Schedule 13G/A with the SEC, reporting a significant position in Rapid7 Inc (RPD). As of the event date on March 31, 2026, the filer beneficially owns 5,480,850 shares of common stock, representing an 8.31% ownership stake in the company. This filing marks an increase from a previously reported 0% position, indicating a new major holding or a significant accumulation period. The filing reveals that Vanguard Portfolio Management exercises sole dispositive power over all 5,480,850 shares, while holding sole voting power over 316,278 shares. The shares are held in the ordinary course of business by Vanguard Portfolio Management and its affiliates, including Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC. The reporting person certified that the acquisition was not intended to influence or change the control of the issuer. Rapid7 Inc is headquartered in Boston, Massachusetts, and the securities are classified as common stock.