IBKR vice chair covers taxes with 22,486 shares

Interactive Brokers Group, Inc. director and Vice Chairman Earl H. Nemser reported a tax-withholding share disposition tied to equity compensation.

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. director and Vice Chairman Earl H. Nemser reported a tax-withholding share disposition tied to equity compensation. On May 8, 2026, 22,486 shares of Class A common stock were delivered at a reference price of $84.42 per share to cover tax obligations on vested awards.

After this non-market tax-withholding disposition, Nemser directly held 429,344 shares of Class A common stock. The reported holdings include shares attributable to vested and unvested restricted stock units granted under the company’s amended 2007 Stock Incentive Plan.

Insider Trade Summary

Exercise Price or Tax Liability: 22,486 shares

Exercise Price or Tax Liability 1 txn

Insider Nemser Earl H

Role Vice Chairman

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Class A common stock	22,486	$84.42	$1.90M

Holdings After Transaction: Class A common stock — 429,344 shares (Direct)

Footnotes (2)

1. F1. The price represents the closing price of the issuer's Class A common stock as of May 8, 2026, the vesting date.
2. 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") and (b) unvested restricted stock units that were awarded under the Plan.

Key Figures

Tax-withholding shares: 22,486 shares Reference share price: $84.42 per share Post-transaction holdings: 429,344 shares

3 metrics

Tax-withholding shares 22,486 shares Class A common stock delivered to cover tax obligations on May 8, 2026

Reference share price $84.42 per share Closing price of Class A common stock on May 8, 2026 vesting date

Post-transaction holdings 429,344 shares Nemser’s direct Class A common stock holdings after tax-withholding disposition

Key Terms

tax-withholding disposition, restricted stock units, amended 2007 Stock Incentive Plan, Class A common stock

4 terms

tax-withholding disposition financial

"Nemser reported a tax-withholding share disposition tied to equity compensation."

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

restricted stock units financial

"includes shares attributable to vested and unvested restricted stock units granted under the plan"

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.

amended 2007 Stock Incentive Plan financial

"restricted stock units that were awarded under the amended 2007 Stock Incentive Plan"

Class A common stock financial

"22,486 shares of Class A common stock were delivered at a reference price"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did IBKR Vice Chairman Earl H. Nemser report?

Earl H. Nemser reported a tax-withholding disposition of 22,486 IBKR Class A shares. These shares were delivered to cover tax obligations associated with vested equity awards, not sold in an open-market transaction.

At what price were the 22,486 IBKR shares used for tax withholding valued?

The 22,486 IBKR Class A shares were valued at $84.42 per share. This price represents the closing price of the company’s Class A common stock on May 8, 2026, which was the vesting date for the relevant awards.

How many IBKR shares does Earl H. Nemser hold after this Form 4 transaction?

Following the reported tax-withholding disposition, Earl H. Nemser directly holds 429,344 shares of IBKR Class A common stock. This figure includes stock attributable to vested and unvested restricted stock units granted under the company’s amended 2007 Stock Incentive Plan.

Was the IBKR Form 4 transaction a market sale of shares?

No, the transaction was classified as a tax-withholding disposition, not a market sale. Shares were delivered to satisfy tax liabilities related to vesting equity awards, rather than being sold on the open market for discretionary portfolio reasons.

What role do restricted stock units play in Earl H. Nemser’s IBKR holdings?

Nemser’s reported holdings include shares attributable to both vested and unvested restricted stock units. These units were granted under Interactive Brokers Group’s amended 2007 Stock Incentive Plan and contribute to his total direct Class A common stock position.

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

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Accepted by SEC EDGAR 05/28/2026 - 04:01 PM Learn about SEC filing dates

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)
05/08/2026

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	05/08/2026	05/26/2026	F		22,486	D	$84.42(1)	429,344(2)	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. The price represents the closing price of the issuer's Class A common stock as of May 8, 2026, the vesting date.

2. 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	05/28/2026
	** 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)