Earl Nemser of Interactive Brokers (IBKR) adds 803,568 indirect shares

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. director and Vice Chairman Earl H. Nemser reported the indirect acquisition of 803,568 Class A shares on July 31, 2026, held through EN Holdings LLC, in connection with a partial redemption of that LLC’s interest in IBG Holdings LLC at a reference closing price of $87.99 per share. Nemser also reports 429,344 Class A shares held directly, including vested and unvested restricted stock units granted under the company’s amended 2007 Stock Incentive Plan.

Insider Trade Summary

Net Buyer: 803,568 shares

Net Buy 2 txns

Insider Nemser Earl H

Role Vice Chairman

Type	Security	Shares	Price	Value
Grant/Award	Class A common stock F1, F2	803,568	$87.99	$70.71M
holding	Class A common stock F3	--	--	--

Holdings After Transaction: Class A common stock — 803,568 shares (Indirect, By EN Holdings LLC); Class A common stock — 429,344 shares (Direct)

Footnotes (3)

1. F1. Represents number of securities acquired by a limited liability company, owned by the Reporting Person and his affiliates, 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 interests in IBG LLC.
2. F2. The per share price provided represents the closing price of the issuer's Class A common stock on 7/31/2026, the date when the exchange described in footnote (1) took place.
3. 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.

Key Figures

Indirect Class A shares acquired: 803,568 shares Indirect Class A shares held after transaction: 803,568 shares Reference closing price: $87.99 per share +1 more

4 metrics

Indirect Class A shares acquired 803,568 shares Number of Class A shares acquired by EN Holdings LLC in partial redemption on July 31, 2026

Indirect Class A shares held after transaction 803,568 shares Indirect holdings via EN Holdings LLC following the reported acquisition as of July 31, 2026

Reference closing price $87.99 per share Closing price of Interactive Brokers Class A common stock on 7/31/2026 used as reference in the exchange

Direct Class A shares after transaction 429,344 shares Direct holdings, including vested and unvested restricted stock units under the amended 2007 Stock Incentive Plan

Key Terms

partial redemption, restricted stock units, membership interests

3 terms

partial redemption financial

"acquired by a limited liability company... in a partial redemption of its interest"

restricted stock units financial

"includes Class A common stock attributable to vested restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

membership interests financial

"in exchange for membership interests in IBG LLC"

An ownership stake in a limited liability company (LLC) that represents a holder’s share of the business’s profits, losses, and decision-making power. Think of it like a slice of the company’s pie and a seat at its management table: it determines how much money the owner can receive and how much influence they have over company choices. Investors care because these interests affect returns, control, transferability, and tax treatment.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/04/2026 - 04:28 PM Accepted by SEC EDGAR 08/04/2026 - 04:27 PM Learn about SEC filing dates

FAQ

What insider transaction did Earl H. Nemser report for Interactive Brokers (IBKR)?

Earl H. Nemser reported an indirect acquisition of 803,568 Class A shares of Interactive Brokers on July 31, 2026. The shares were received by EN Holdings LLC in a partial redemption of its interest in IBG Holdings LLC, not through an open-market purchase.

How many Interactive Brokers (IBKR) shares does Nemser now hold indirectly?

Following the reported transaction, an entity associated with Earl H. Nemser, EN Holdings LLC, holds 803,568 Interactive Brokers Class A shares indirectly. These shares were obtained in a partial redemption of its interest in IBG Holdings LLC on July 31, 2026.

What is Earl H. Nemser’s direct Interactive Brokers (IBKR) shareholding after this Form 4?

After the reported transactions, Earl H. Nemser holds 429,344 Interactive Brokers Class A shares directly. This figure includes shares attributable to vested restricted stock units and unvested restricted stock units awarded under the company’s amended 2007 Stock Incentive Plan.

Was Nemser’s 803,568-share IBKR acquisition an open-market purchase?

No. The 803,568-share position was acquired by EN Holdings LLC in a partial redemption of its interest in IBG Holdings LLC. IBG Holdings LLC obtained the shares from Interactive Brokers in exchange for membership interests in IBG LLC immediately before that redemption.

What price is associated with Nemser’s IBKR acquisition on July 31, 2026?

The Form 4 reports a per-share figure of $87.99, which footnotes describe as the closing price of Interactive Brokers Class A common stock on July 31, 2026. It is presented as a reference price for the exchange transaction.

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Nemser Earl H

(Last) (First) (Middle)

ONE PICKWICK PLAZA

(Street)

GREENWICH CONNECTICUT 06830

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Vice Chairman

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/31/2026

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

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

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

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	07/31/2026		A		803,568(1)	A	$87.99(2)	803,568(1)	I	By EN Holdings LLC
Class A common stock								429,344(3)	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 by the Reporting Person and his affiliates, 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 interests in IBG LLC.

2. The per share price provided represents the closing price of the issuer's Class A common stock on 7/31/2026, the date when the exchange described in footnote (1) took place.

3. 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 Earl H Nemser	08/04/2026
	** 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.
* Form 4: SEC 1474 (03-26)