Vanguard Capital Management Reports New 7.3% Passive Stake in Interactive Brokers Group Inc

On April 30, 2026, Vanguard Capital Management LLC filed a Schedule 13G with the SEC, reporting a new 7.3% ownership stake in Interactive Brokers Group Inc (IBKR). The filing indicates that as of the event date on March 31, 2026, Vanguard beneficially owns 32,540,281 shares of common stock. According to the filing, the investment advisor holds sole dispositive power over all 32,540,281 shares, while exercising sole voting power over 4,359,920 shares. The reported holdings include securities managed by various Vanguard affiliates, such as Vanguard Asset Management Limited and Vanguard Global Advisers, LLC. The filing specifies that these shares were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. This position represents a significant increase from the previously reported 0.0% ownership, establishing Vanguard as a major institutional shareholder in the electronic brokerage firm. The total value of the position is estimated at approximately $2.62 billion based on the filing data.