Interactive Brokers Group, Inc. (IBKR) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-04-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Interactive Brokers Group, Inc. (IBKR) CIK: 0001381197 --- Reporting Owner --- Name: Harris Lawrence E CIK: 0001406586 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A common stock Date: 2026-04-28 | Code: S (Open market sale) Shares: -26,000 | Price: $76.93 Total Value: $2,000,180.00 Shares Owned After: 173,482 | Ownership: D (Direct) Footnotes: [F1] The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.87 to $77.04. The Reporting Person undertakes to provide Interactive Brokers Group, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in this footnote (1). --- Footnotes (Complete Index) --- F1: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.87 to $77.04. The Reporting Person undertakes to provide Interactive Brokers Group, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in this footnote (1). --- Signature --- /s/ /s/ Raymond Bussiere as authorized signatory for Lawrence E Harris (2026-04-29)