IBKR INTERACTIVE BROKERS GROUP INC Capital Structure Changes 8-K Filing 2025 - Stock Split Announcement On April 15, 2025, Interactive Brokers Group, Inc. reported its financial results for Q1 2025 and announced a proposed four-for-one stock split, subject to shareholder approval, with additional shares distributed on June 17, 2025.Get access to all SEC 8-K filings of the INTERACTIVE BROKERS GROUP INC