Interactive Brokers Group, Inc. — Director's Dealing 2021

Jan 7, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Interactive Brokers Group, Inc. (IBKR)
CIK: 0001381197
Period of Report: 2021-01-05

Reporting Person: Brody Paul Jonathan (Director, Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-01-05	Class A common stock	S	1040	$61.91	Disposed	155760	Indirect
2021-01-05	Class A common stock	S	1518	$62.75	Disposed	154242	Indirect
2021-01-06	Class A common stock	S	103	$64.14	Disposed	154139	Indirect
2021-01-06	Class A common stock	S	232	$65.12	Disposed	153907	Indirect
2021-01-06	Class A common stock	S	285	$66.25	Disposed	153622	Indirect
2021-01-06	Class A common stock	S	1152	$67.19	Disposed	152470	Indirect
2021-01-06	Class A common stock	S	735	$67.95	Disposed	151735	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A common stock	698113	Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by PJB Holdings LLC, which is owned indirectly by the Reporting Person.

F2: Represents number of securities owned by PJB Holdings LLC, which is owned indirectly by the Reporting Person.

F3: This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the amended 2007 Stock Incentive Plan ("Plan") and (b) unvested restricted stock units that were awarded under the Plan.

F4: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.35 to $62.34. 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 footnotes (4) - (10) to this Form 4.

F5: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.35 to $63.19.

F6: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.62 to $64.61.

F7: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.62 to $65.61.

F8: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $65.62 to $66.61.

F9: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $66.62 to $67.61.

F10: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $67.62 to $68.35.