UNITED ~~STATES~~STATESSECURITIES AND EXCHANGE COMMISSIONWASHINGTON, D.C. 20549

SECURITIESFORM AND EXCHANGE COMMISSION8-K

~~WASHINGTON,~~CURRENT ~~D.C. 20549~~REPORT

~~FORM~~Pursuant ~~8-K~~to Section 13 or 15(d) of the Securities Exchange Act of 1934

~~CURRENT~~Date ~~REPORT~~of Report (Date of earliest event reported): January 20, 2026

~~Pursuant~~Interactive toBrokers ~~Section~~Group, ~~13 or 15(d) of the~~Inc.

~~Securities~~(Exact ~~Exchange~~name ~~Act~~ of ~~1934~~Registrant as Specified in Its Charter)

Date of Report (Date of Earliest Event Reported): October 16, 2025


Delaware	001-33440	30-0390693
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

One Pickwick Plaza
Greenwich, Connecticut		06830
(Address of Principal Executive Offices)		(Zip Code)

~~Interactive~~Registrant’s ~~Brokers~~Telephone ~~Group~~Number, ~~Inc.~~ Including Area Code: 203 618-5800

(~~Exact~~Former Name ofor ~~Registrant~~Former asAddress, ~~Specified~~if inChanged ~~its~~Since ~~Charter~~Last Report)

Delaware	001-33440	30-0390693
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification Number)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

~~One~~☐Written ~~Pickwick~~communications ~~Plaza,~~pursuant ~~Greenwich,~~to ~~Connecticut~~Rule ~~06830~~425 under the Securities Act (17 CFR 230.425)

~~(Address~~☐Soliciting ofmaterial ~~Principal~~pursuant ~~Executive~~to ~~Offices)~~Rule 14a-12 under the Exchange Act (~~Zip~~17 ~~Code~~CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(~~203~~b) ~~618~~under the Exchange Act (17 CFR 240.14d-~~5800~~2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(~~Registrant’s~~c) ~~Telephone~~under ~~Number,~~the ~~Including~~Exchange ~~Area~~Act ~~Code~~(17 CFR 240.13e-4(c))

~~Not~~Securities ~~Applicable~~registered pursuant to Section 12(b) of the Act:

(Former Name or Former Address, if Changed Since Last Report)


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $.01 per share	IBKR	The Nasdaq Global Select Market

~~Check~~Indicate by check mark whether the ~~appropriate~~registrant ~~box~~is ~~below~~an ifemerging growth company as defined in Rule 405 of the ~~Form~~Securities ~~8-K~~Act ~~filing~~of is1933 ~~intended~~(§ 230.405 toof ~~simultaneously~~this ~~satisfy~~chapter) ~~the~~or ~~filing~~Rule ~~obligation~~12b-2 of the ~~registrant~~Securities ~~under~~Exchange ~~any~~Act of ~~the following~~1934 ~~provisions:~~(§ 240.12b-2 of this chapter).

☐Emerging ~~Written~~growth ~~communications~~company ~~pursuant to Rule 425 under the Securities Act (17 CFR 230.425)~~ ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Title of each class		Trading Symbol		Name of the exchange on which registered
Class A common stock, par value $.01 per share		IBKR		The Nasdaq Global Select Market

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐1

Item 2.02. Results of Operations and Financial Condition.

On ~~October~~January 1620, ~~2025~~2026, Interactive Brokers Group, Inc. (the “Company”) issued a press release reporting its financial results for the quarter ended ~~September~~December 3031, 2025. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated herein by reference. All of the information furnished in this report (including Exhibit 99.1 hereto) shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and unless expressly set forth by specific reference in such filings, shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended, whether made before or after the date hereof and regardless of any general incorporation language in such filings.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

99.1 Press Release dated October 16, 2025.


99.1	Press Release dated January 20, 2026.

104	Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL Document).

~~104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL Document).~~***

~~***~~2

~~SIGNATURE~~SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the ~~Registrant~~registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Dated: October 16, 2025


			INTERACTIVE BROKERS GROUP, INC.

Date:	January 20, 2026	By:	/s/ Paul J. Brody
			Paul J. Brody Chief Financial Officer, Treasurer and Secretary

~~INTERACTIVE BROKERS GROUP, INC. By: /s/ Paul J. Brody Name: Paul J. Brody Title: Chief Financial Officer, Treasurer and Secretary~~3

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