Interactive Brokers (NASDAQ: IBKR) grants 11,156 RSUs to accounting chief

Rhea-AI Filing Summary

Interactive Brokers Group Chief Accounting Officer Denis Mendonca reported an equity award in the form of 11,156 shares of Class A common stock on 12/31/2025, recorded at a price of $0 as this reflects a grant rather than an open‑market purchase. The footnotes explain this represents restricted stock units granted under the company’s 2007 Stock Incentive Plan.

The award will vest 20% on or about 5/9/2026 and 20% on each of the first four anniversaries of that date, creating a five-year vesting schedule. Following this grant, Mendonca beneficially owned 156,228 shares of Class A common stock, including both vested and unvested restricted stock units awarded under the plan. A prior four-for-one stock split on June 17, 2025 increased his indirect ownership by 108,804 shares.

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^*

Mendonca Denis

(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)

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

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		11,156(1)	A	$0(1)	156,228(2)(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. 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. On June 17, 2025, the issuer effected a four-for-one split of its common stock, resulting in the Reporting Person's indirect ownership of 108,804 additional shares of common stock.

3. 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.

	/s/ Denis Mendonca	01/07/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did IBKR’s Denis Mendonca report on this Form 4?

Denis Mendonca, Chief Accounting Officer of Interactive Brokers Group, Inc. (IBKR), reported an acquisition of 11,156 shares of Class A common stock on 12/31/2025. The transaction was coded "A" for an acquisition and was recorded at a price of $0, reflecting an equity grant rather than a market purchase.

What is the vesting schedule for the 11,156 restricted stock units granted to IBKR’s Chief Accounting Officer?

The filing explains that the 11,156 shares represent restricted stock units granted under the 2007 Stock Incentive Plan. These units will vest 20% on or about 5/9/2026 and 20% on each of the first four anniversaries of 5/9/2026, creating a five-year graded vesting schedule.

How many IBKR shares does Denis Mendonca beneficially own after the reported transaction?

After the reported grant, Denis Mendonca beneficially owned 156,228 shares of Interactive Brokers Group Class A common stock. This amount includes shares attributable to vested restricted stock units and unvested restricted stock units that were awarded under the company’s stock incentive plan.

How did Interactive Brokers’ June 17, 2025 stock split affect the reporting person’s holdings?

The footnotes state that on June 17, 2025 Interactive Brokers Group effected a four-for-one split of its common stock. As a result of this split, the reporting person’s indirect ownership increased by 108,804 additional shares of common stock.

Is the reported IBKR insider transaction a direct or indirect ownership position?

For the 12/31/2025 transaction, the Form 4 indicates that the 156,228 shares beneficially owned following the grant are held with direct (D) ownership. The nature of ownership field for this specific holding is shown without an indirect ownership description.

Under what plan were the restricted stock units for IBKR’s officer granted?

The restricted stock units reported for Denis Mendonca were granted under Interactive Brokers Group’s 2007 Stock Incentive Plan, as amended. The filing notes that the total beneficial ownership figure includes both vested and unvested restricted stock units awarded under this plan.