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Cover and table of contents

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Cover and table of contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549


FORM 10-Q


(Mark One)
þQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2025 OR
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from to

Commission File Number: 001-33440

INTERACTIVE BROKERS GROUP, INC.

(Exact name of registrant as specified in its charter)

Delaware ‎(State or other jurisdiction of ‎incorporation or organization)30-0390693 ‎(I.R.S. Employer ‎Identification No.)

One Pickwick Plaza

Greenwich**,** Connecticut 06830

(Address of principal executive office)

(203) 618-5800

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer þAccelerated filer oNon-accelerated filer o ‎Smaller reporting company oEmerging growth company o

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. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ

Title of each classTrading SymbolName of the exchange on which registered
Common Stock, par value $.01 per shareIBKRThe Nasdaq Global Select Market

As of October 31, 2025, there were 445,363,717 shares of the issuer’s Class A common stock, par value $0.01 per share, outstanding and 400 shares of the issuer’s Class B common stock, par value $0.01 per share, outstanding.

QUARTERLY REPORT ON FORM 10**-**Q FOR THE QUARTER ENDED SEPTEMBER 30, 2025

Tab****le of Contents

PART IFINANCIAL INFORMATION
ITEM 1.Financial Statements (Unaudited)
Condensed Consolidated Statements of Financial Condition2
Condensed Consolidated Statements of Comprehensive Income3
Condensed Consolidated Statements of Cash Flows4
Condensed Consolidated Statements of Changes in Equity5
Notes to Condensed Consolidated Financial Statements7
1.Organization of Business7
2.Significant Accounting Policies7
3.Trading Activities and Related Risks17
4.Equity and Earnings per Share18
5.Comprehensive Income21
6.Financial Assets and Financial Liabilities22
7.Collateralized Transactions29
8.Revenues from Contracts with Customers30
9.Other Income (Loss)32
10.Employee Incentive Plans32
11.Income Taxes34
12.Leases35
13.Commitments, Contingencies and Guarantees36
14.Segment Reporting and Geographic Information38
15.Regulatory Requirements39
16.Related Party Transactions40
17.Subsequent Events40
ITEM 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations41
ITEM 3.Quantitative and Qualitative Disclosures about Market Risk64
ITEM 4.Controls and Procedures68
PART II**.**OTHER INFORMATION
ITEM 1.Legal Proceedings69
ITEM 1A.Risk Factors69
ITEM 2.Unregistered Sales of Equity Securities and Use of Proceeds69
ITEM 3.Defaults upon Senior Securities69
ITEM 4.Mine Safety Disclosures69
ITEM 5.Other Information70
ITEM 6.Exhibits71
Signature

i

PART I. FINANCIAL INFORMATION

Next: Item 1. FINANCIAL STATEMENTS (Unaudited)