Earl H. Nemser adds IBKR stock via equity awards at Interactive Brokers (IBKR)

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. vice chairman Earl H. Nemser reported new equity awards in Class A common stock. On 12/31/2025 he received 23,240 restricted stock units under the 2007 Stock Incentive Plan that will vest 20% on or about 5/9/2026 and 20% on each of the first four anniversaries of 5/9/2026. He also received an annual grant of 389 restricted stock units for serving on the Board of Directors, which vested immediately on 12/31/2025 at the closing share price of $64.31.

Following these grants, Nemser directly beneficially owned 451,441 shares of Class A common stock, including vested and unvested restricted stock units awarded under the plan. He also indirectly beneficially owned 400,000 shares of Class A common stock through EN Holdings LLC, which is owned by him and his affiliates.

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

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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 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)
	Vice Chairman

3. Date of Earliest Transaction (Month/Day/Year)
12/31/2025

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	12/31/2025	01/05/2026	A		23,240(1)	A	$0(1)	451,052(2)	D
Class A common stock	12/31/2025	01/05/2026	A		389(3)	A	$64.31(4)	451,441(2)	D
Class A common stock								400,000(5)	I	by EN Holdings LLC

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. This represents a grant of restricted stock units under the 2007 Stock Incentive Plan as amended ("Plan") that will vest 20% on or about 5/9/2026 and 20% on each of the first four anniversaries of 5/9/2026.

2. This amount includes (a) Class A common stock attributable to vested restricted stock units that were awarded under the Plan and (b) unvested restricted stock units that were awarded under the Plan.

3. This represents an annual grant of restricted stock units under the Plan for being a member of the issuer's Board of Directors, which vested immediately on 12/31/2025.

4. The price represents the closing price of the issuer's Class A common stock on December 31, 2025.

5. Represents number of securities owned by EN Holdings LLC, which is owned by the Reporting Person and his affiliates.

	/s/ Raymond Bussiere as authorized signatory for Earl H Nemser	01/07/2026
	** 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).
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FAQ

What insider transaction did Earl H. Nemser report for IBKR?

Earl H. Nemser reported two acquisitions of Class A common stock on 12/31/2025: 23,240 restricted stock units at $0 and an additional 389 restricted stock units tied to board service.

How many Interactive Brokers (IBKR) shares does Earl H. Nemser own after these transactions?

After the reported grants, Earl H. Nemser beneficially owned 451,441 shares of Class A common stock directly and an additional 400,000 shares indirectly through EN Holdings LLC.

What are the vesting terms for Earl H. Nemsers 23,240 restricted stock units at IBKR?

The 23,240 restricted stock units granted under the 2007 Stock Incentive Plan vest 20% on or about 5/9/2026 and 20% on each of the first four anniversaries of that date.

What is the nature of the 389-share grant to Earl H. Nemser at Interactive Brokers?

The 389 restricted stock units represent an annual grant under the 2007 Stock Incentive Plan for serving on the Board of Directors and vested immediately on 12/31/2025.

At what price was the 389-share IBKR board grant valued?

The 389-share grant was valued at $64.31 per share, which the disclosure identifies as the closing price of the issuer's Class A common stock on December 31, 2025.

What is EN Holdings LLC in relation to Earl H. Nemsers IBKR ownership?

EN Holdings LLC holds 400,000 shares of IBKR Class A common stock and is described as being owned by Earl H. Nemser and his affiliates, giving him indirect beneficial ownership of those shares.

Does Earl H. Nemsers IBKR filing include any derivative securities?

The disclosure table for derivative securities does not list any acquired or disposed derivative instruments; it focuses on non-derivative Class A common stock and restricted stock units.