Form Type: 4

Accession Number:	0001567619-21-021249
Date:	2021-11-24
Issuer:	INTERACTIVE BROKERS GROUP, INC. (IBKR)
Original Submission Date:

Reporting Person:

FRANK THOMAS AJ
ONE PICKWICK PLAZA
GREENWICH, CT 06830

Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
Title of Security	Transaction Date	2a. Deemed Execution Date	Transaction Code	Shares	Acquired or Disposed	Price per share	5. Amount of Securities Beneficially Owned Following Reported Transaction	6. Ownership Form Direct or Indirect	Nature of Indirect Ownership
CLASS A COMMON STOCK	2021-11-24		S	2,440	d	$76.48	900,253	direct
CLASS A COMMON STOCK	2021-11-24		S	12,749	d	$77.57	887,504	direct
CLASS A COMMON STOCK	2021-11-24		S	1,653	d	$78.27	885,851	direct
CLASS A COMMON STOCK	2021-11-26		S	8,499	d	$74.62	877,352	direct
CLASS A COMMON STOCK	2021-11-26		S	236	d	$75.21	877,116	direct

Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, convertible securities
Title of Derivative Security	Conversion or Exercise Price of Derivative Security	Transaction Date	Deemed Execution Date	Transaction Code	Number of Derivative Securities Acquired (A) or Disposed of (D)	Date Exercisable	Expiration Date	Title and Amount of Securities Underlying Derivative Security	Price of Derivative Security	Number of derivative Securities Beneficially Owned Following Reported Transaction(s)	Ownership Form: Direct (D) or Indirect (I)	Nature of Indirect Beneficial Ownership

Footnotes
ID	footnote
f1	the sales reported on this form 4 were effected pursuant to a rule 10b5-1 trading plan adopted by the reporting person.
f2	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"); (b) unvested restricted stock units that were awarded under the plan; and (c) securities acquired by the reporting person, in a partial redemption of his interest in ibg holdings llc.
f3	the price reported in column 4 is a weighted average price. these shares were sold in multiple transactions at prices ranging from $75.96 to $76.95. 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 (3) - (6) to this form 4.
f4	the price reported in column 4 is a weighted average price. these shares were sold in multiple transactions at prices ranging from $76.96 to $77.95.
f5	the price reported in column 4 is a weighted average price. these shares were sold in multiple transactions at prices ranging from $77.96 to $78.50.
f6	the price reported in column 4 is a weighted average price. these shares were sold in multiple transactions at prices ranging from $74.10 to $75.01.

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