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: 2026-02-25 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Interactive Brokers Group, Inc. (IBKR) CIK: 0001381197 --- Reporting Owner --- Name: Conkling Lori A CIK: 0002067952 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Class A common stock Date: 2026-02-25 | Code: P (Open market purchase) Shares: +50 | Price: $73.21 Total Value: $3,660.50 Shares Owned After: 2,384 | Ownership: D (Direct) Footnotes: [F1] This amount includes (a) securities acquired by the Reporting Person; (b) Class A common stock attributable to vested restricted stock units that were awarded under the 2007 Stock Incentive Plan as amended ("Plan"); and (c) unvested restricted stock units that were awarded under the Plan. [Transaction #2] Security: Class A common stock Date: 2026-03-02 | Code: P (Open market purchase) Shares: +25 | Price: $69.21 Total Value: $1,730.25 Shares Owned After: 2,409 | Ownership: D (Direct) Footnotes: [F1] This amount includes (a) securities acquired by the Reporting Person; (b) Class A common stock attributable to vested restricted stock units that were awarded under the 2007 Stock Incentive Plan as amended ("Plan"); and (c) unvested restricted stock units that were awarded under the Plan. --- Footnotes (Complete Index) --- F1: This amount includes (a) securities acquired by the Reporting Person; (b) Class A common stock attributable to vested restricted stock units that were awarded under the 2007 Stock Incentive Plan as amended ("Plan"); and (c) unvested restricted stock units that were awarded under the Plan. --- Signature --- /s/ /s/ Matthew Kelly as authorized signatory for Lori A Conkling (2026-03-26)