[Form 4] Interactive Brokers Group, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Paul J. Brody, Chief Financial Officer and director of Interactive Brokers Group, Inc. (IBKR), reported multiple sales of Class A common stock on September 15–16, 2025. The Form 4 lists disposals of 57,289, 37,506, 1,499, 98,601 and 587 shares at weighted-average prices shown in the filing (ranges provided in footnotes). Each line shows the shares are indirectly owned by PJB Holdings LLC, and the filing lists post-transaction beneficial ownership figures associated with those holdings (for example, 520,529 and 382,336 shares on different lines). The filing was signed by an authorized signatory on behalf of Mr. Brody on September 17, 2025.

Positive

• Timely disclosure of insider transactions via a filed Form 4, including dates and weighted-average price ranges
• Clear ownership structure indicating shares are held indirectly through PJB Holdings LLC

Negative

• Multiple insider sales on 09/15/2025 and 09/16/2025 of the listed tranches: 57,289; 37,506; 1,499; 98,601; and 587 shares
• No explanatory context in the filing for the sales (e.g., purpose, pre-arranged plan) which may prompt investor concern

Insights

Corporate Governance Expert

TL;DR: Timely disclosure of multiple insider sales by the CFO, all reported as indirect holdings via PJB Holdings LLC.

The Form 4 provides transparent, contemporaneous disclosure of several disposals executed over two days, with weighted-average price ranges disclosed in footnotes. Reporting the holdings as indirect through PJB Holdings LLC clarifies the chain of ownership but reduces direct-manager signaling. For governance reviewers, the key facts are the dates, share counts per tranche and the post-transaction beneficial ownership figures; no additional corporate actions or exemptions are disclosed in the filing.

Securities Analyst

TL;DR: Material insider selling over two days by the CFO could be viewed negatively by some investors, though context is not provided.

The filing documents five separate sales of Class A common stock on 9/15–9/16/2025 with specified tranche sizes and weighted-average price ranges in footnotes. All sales are reported as indirect via PJB Holdings LLC. The Form 4 lists post-sale beneficial ownership levels for the indirect holdings and references restricted stock units in a footnote. The filing does not include reasons for the sales nor any purchases to offset them, so market interpretation will depend on external context not provided here.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Brody Paul Jonathan

(Last) (First) (Middle)

ONE PICKWICK PLAZA

(Street)

GREENWICH CT 06830

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Interactive Brokers Group, Inc. [ IBKR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A common stock	09/15/2025		S		57,289	D	$62.66(2)	520,529(1)	I	by PJB Holdings LLC
Class A common stock	09/15/2025		S		37,506	D	$63.79(3)	483,023(1)	I	by PJB Holdings LLC
Class A common stock	09/15/2025		S		1,499	D	$64.26(4)	481,524(1)	I	by PJB Holdings LLC
Class A common stock	09/16/2025		S		98,601	D	$62.24(5)	382,923(1)	I	by PJB Holdings LLC
Class A common stock	09/16/2025		S		587	D	$62.62(6)	382,336(1)	I	by PJB Holdings LLC
Class A common stock								2,885,496(7)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents number of securities acquired by a limited liability company, owned indirectly by the Reporting Person, in a partial redemption of its interest in IBG Holdings LLC. Such securities were acquired by IBG Holdings LLC from Interactive Brokers Group, Inc. immediately prior to the redemption in exchange for membership interest in IBG LLC.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.22 to $63.21. 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 (2) - (6) to this Form 4.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.22 to $64.21.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.22 to $64.30.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.61 to $62.60.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.61 to $62.68.

7. 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.

	/s/ Raymond Bussiere as authorized signatory for Paul J. Brody	09/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

Who filed the Form 4 for IBKR?

Paul J. Brody, Chief Financial Officer and Director, reported the transactions; the Form 4 was signed by an authorized signatory on his behalf.

What shares were sold in the Form 4 (IBKR) and when?

Class A common stock sales occurred on 09/15/2025 and 09/16/2025 in five tranches of 57,289; 37,506; 1,499; 98,601; and 587 shares respectively.

At what prices were the IBKR shares sold?

The filing reports weighted-average prices with ranges in footnotes: transactions ranged approximately from $61.61 to $64.30 depending on tranche; exact per-trade breakdowns are available upon request per the filing.

How are the sold shares owned according to the filing?

All reported shares are listed as indirectly owned by PJB Holdings LLC; the Form 4 shows post-transaction beneficial ownership figures for those indirect holdings.

Does the Form 4 explain why the sales occurred?

No. The filing discloses transaction details and footnote ranges for prices but does not state a reason or reference a Rule 10b5-1 plan.