Interactive Brokers (IBKR) director sells 26,000 shares in open-market trade

Rhea-AI Filing Summary

Interactive Brokers Group, Inc. director Harris Lawrence E executed an open-market sale of 26,000 shares of Class A common stock at a weighted average price of $76.93 per share. After this transaction, he directly holds 173,482 shares. The sale was completed through multiple trades priced between $76.87 and $77.04.

Insider Trade Summary

Net Seller: 26,000 shares ($2,000,180)

Net Sell 1 txn

Insider Harris Lawrence E

Role null

Sold 26,000 shs ($2.00M)

Type	Security	Shares	Price	Value
Sale	Class A common stock	26,000	$76.93	$2.00M

Holdings After Transaction: Class A common stock — 173,482 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares sold: 26,000 shares Weighted average sale price: $76.93 per share Post-transaction holdings: 173,482 shares +1 more

4 metrics

Shares sold 26,000 shares Open-market sale of Class A common stock

Weighted average sale price $76.93 per share Price for 26,000 shares sold

Post-transaction holdings 173,482 shares Shares directly held after sale

Sale price range $76.87–$77.04 per share Range of individual trade prices

Key Terms

open-market sale, weighted average price, Class A common stock

3 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Class A common stock financial

""security_title": "Class A common stock""

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.

Form 4 Insider Transactions: What Each Field Means →

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^*

Harris Lawrence E

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/28/2026

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	04/28/2026		S		26,000	D	$76.93(1)	173,482	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 reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.87 to $77.04. 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 this footnote (1).

	/s/ Raymond Bussiere as authorized signatory for Lawrence E Harris	04/29/2026
	** 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)

FAQ

What insider transaction did IBKR director Harris Lawrence E report?

Director Harris Lawrence E reported an open-market sale of 26,000 IBKR Class A common shares. The Form 4 shows a weighted average price of $76.93 per share, with individual trade prices ranging from $76.87 to $77.04 during the transaction.

How many Interactive Brokers (IBKR) shares does Harris Lawrence E hold after this sale?

After the reported sale, Harris Lawrence E directly holds 173,482 shares of Interactive Brokers Class A common stock. This figure reflects his position immediately following the 26,000-share open-market transaction disclosed in the Form 4 filing.

At what prices were the IBKR shares sold in this Form 4 transaction?

The reported weighted average sale price was $76.93 per IBKR share. According to the footnote, the 26,000 shares were sold in multiple transactions at prices between $76.87 and $77.04, with full trade details available upon request.

Was the IBKR insider transaction an open-market sale or another type of trade?

The transaction was an open-market sale of Class A common stock. The Form 4 identifies the transaction code as “S” and describes it as a sale in the open market or a private transaction, with no derivative exercises or gifts reported.

Does the Form 4 for IBKR show any option exercises or derivative positions for Harris Lawrence E?

The filing does not show any derivative transactions or option exercises for this event. The derivativeSummary section is empty, indicating the reported activity consists solely of the 26,000-share open-market sale of Class A common stock.