BlackRock, Inc. Reduces Stake in Interactive Brokers Group Inc.

BlackRock, Inc. has filed an amendment (Schedule 13G/A) to report a reduction in its stake in Interactive Brokers Group Inc. As of September 30, 2025, BlackRock owns 27,619,620 shares of Class A Stock, representing a 6.2% ownership stake. This marks a decrease of 12,617,108 shares (31.36%) from its previous holdings. The value of the shares held by BlackRock is approximately $1,829,247,432.60, reflecting a 17.95% decrease. BlackRock has certified that the shares were acquired and are held in the ordinary course of business and not for the purpose of influencing the control of the issuer. The filing also includes details about the reporting person's citizenship, business address, and the nature of the ownership.