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Insider Trading Arrangements (Details)
 3 Months Ended
Jun. 30, 2023
shares
Insider Trading Arrangements [Line Items]  
Material Terms of Trading Arrangement [Text Block] Rule 10b5-1 Trading Plans

The following table discloses the adoption of Rule 10b5-1 trading plans for the sale of shares of our common stock by our directors and officers (as defined in Rule 16a-1(f) under the Securities Exchange Act of 1934, as amended) during the three months ended June 30, 2023, each of which is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act.

Name

Title

Plan Adoption and/or Termination

Plan Adoption Date

Plan Expiration Date (1)

Purchase or Sale

Aggregate Number of IBKR shares to be Sold

Thomas A. Frank

Executive Vice President and Chief Information Officer

Adoption

June 9, 2023

May 17, 2024

Sale

1,000,000

Paul J. Brody

Chief Financial Officer, Treasurer, Secretary and Director

Adoption

June 9, 2023

May 17, 2024

Sale

500,000

__________________________

(1)Or upon the earlier completion of all authorized transactions under the plan.

Other than as disclosed above, no other director or officer adopted, modified or terminated a contract, instruction or written plan for the purchase or sale of our securities intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or a “non-Rule 10b5-1 trading arrangement”, as defined in Item 408(c) of Regulation S-K.
Non-Rule 10b5-1 Arrangement Adopted [Flag] false
Non-Rule 10b5-1 Arrangement Terminated [Flag] false
Thomas A. Frank [Member]  
Insider Trading Arrangements [Line Items]  
Trading Arrangement, Individual Name Thomas A. Frank
Trading Arrangement, Individual Title Executive Vice President and Chief Information Officer
Rule 10b5-1 Arrangement Adopted [Flag] true
Trading Arrangement, Securities Aggregate Available Amount 1,000,000
Trading Arrangement Adoption Date June 9, 2023
Paul J. Brody [Member]  
Insider Trading Arrangements [Line Items]  
Trading Arrangement, Individual Name Paul J. Brody
Trading Arrangement, Individual Title Chief Financial Officer, Treasurer, Secretary and Director
Rule 10b5-1 Arrangement Adopted [Flag] true
Trading Arrangement, Securities Aggregate Available Amount 500,000
Trading Arrangement Adoption Date June 9, 2023