Basis of Presentation and Consolidation and Accounting Standards Adopted	9 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Consolidation and Accounting Standards Adopted	Basis of Presentation and Consolidation and Accounting Standards Adopted StoneX Group Inc., a Delaware corporation, and its consolidated subsidiaries (collectively “StoneX” or “the Company”), is a global financial services network that connects companies, organizations, traders and investors to the global market ecosystem through a unique blend of digital platforms, end-to-end clearing and execution services, high touch service, and deep expertise. The Company’s common stock trades on The NASDAQ Global Select Market under the symbol “SNEX”. Basis of Presentation The accompanying unaudited Condensed Consolidated Balance Sheet as of September 30, 2025, which has been derived from the audited consolidated balance sheet as of September 30, 2025, and the unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and disclosures normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to those rules and regulations. The Company believes that the included disclosures clearly and fairly present the information within. In management’s opinion, all adjustments, generally consisting of normal accruals, considered necessary to fairly present the condensed consolidated financial statements for the interim periods presented have been reflected as required by Rule 10-01 of Regulation S-X. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2025, as filed with the SEC. These condensed consolidated financial statements include the accounts of StoneX Group Inc. and all entities in which the Company has a controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation. Preparing condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities as of the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates and assumptions in the current year relate to fair value measurements for financial instruments, revenue recognition, valuation of inventories, and income taxes. The Company reviews all significant estimates affecting the financial statements on a recurring basis and makes necessary adjustments to the financial statements presented within this Form 10-Q. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from estimates. Estimates and assumptions are based on management’s best knowledge of current events and actions the Company may undertake in the future, using information reasonably available to the Company as of June 30, 2026 and through the date of this Form 10-Q. Common Stock Splits On March 20, 2026, the Company completed a 3-for-2 split of its common stock, effected as a stock dividend entitling each shareholder of record to receive one additional share of common stock for every two shares owned. Additional shares issued as a result of the stock dividend were distributed after close of trading on March 20, 2026, to stockholders of record at the close of business on March 10, 2026. Cash was distributed in lieu of fractional shares based on the opening price of a share of common stock on March 11, 2026. All share and per share amounts contained herein were retroactively adjusted for this stock split in the Form 10-Q for the Quarterly Period Ended March 31, 2026. Accordingly, an amount equal to the par value of the increased shares resulting from the stock split was reclassified from Additional paid-in-capital to Common stock. On May 26, 2026, the Company’s Board of Directors approved a 3-for-2 split of its common stock, effected as a stock dividend entitling each shareholder of record to receive one additional share of common stock for every two shares owned. Additional shares issued as a result of the stock dividend were distributed after close of trading on July 17, 2026, to stockholders of record at the close of business on July 7, 2026. Cash was distributed in lieu of fractional shares based on the opening price of a share of common stock on July 17, 2026. Although the stock split occurred subsequent to June 30, 2026, all share and per share amounts contained herein have been retroactively adjusted for this stock split, as a result of the stock split being effective prior to the issuance of the financial statements. The shares of common stock retain a par value of $0.01 per share. Accordingly, an amount equal to the par value of the increased shares resulting from the stock split was reclassified from Additional paid-in-capital to Common stock. Accounting Standards Adopted In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-07, Improvements to Reportable Segment Disclosures, which requires entities to enhance disclosures regarding segments, including significant segment expenses. The Company adopted ASU No. 2023-07 related to annual disclosure requirements effective with the fiscal 2025 Form 10-K, with newly required annual disclosures being included in Note 22 of the fiscal 2025 Form 10-K. The Company adopted ASU 2023-07 related to interim disclosure requirements effective with the first quarter fiscal 2026 10-Q filing and applied the updated disclosure requirements retrospectively to all periods presented. See Note 18 for more information.

StoneX Group Inc., a Delaware corporation, and its consolidated subsidiaries (collectively “StoneX” or “the Company”), is a global financial services network that connects companies, organizations, traders and investors to the global market ecosystem through a unique blend of digital platforms, end-to-end clearing and execution services, high touch service, and deep expertise.

The accompanying unaudited Condensed Consolidated Balance Sheet as of September 30, 2025, which has been derived from the audited consolidated balance sheet as of September 30, 2025, and the unaudited interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and disclosures normally included in annual consolidated financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) have been condensed or omitted pursuant to those rules and regulations. The Company believes that the included disclosures clearly and fairly present the information within. In management’s opinion, all adjustments, generally consisting of normal accruals, considered necessary to fairly present the condensed consolidated financial statements for the interim periods presented have been reflected as required by Rule 10-01 of Regulation S-X.

Operating results for interim periods are not necessarily indicative of the results that may be expected for the full year. These condensed consolidated financial statements should be read in conjunction with the Company’s audited consolidated financial statements and related notes contained in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2025, as filed with the SEC.

These condensed consolidated financial statements include the accounts of StoneX Group Inc. and all entities in which the Company has a controlling financial interest. All material intercompany transactions and balances have been eliminated in consolidation.

Preparing condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities as of the date of the condensed consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates and assumptions in the current year relate to fair value measurements for financial instruments, revenue recognition, valuation of inventories, and income taxes. The Company reviews all significant estimates affecting the financial statements on a recurring basis and makes necessary adjustments to the financial statements presented within this Form 10-Q. Although these and other estimates and assumptions are based on the best available information, actual results could be materially different from estimates. Estimates and assumptions are based on management’s best knowledge of current events and actions the Company may undertake in the future, using information reasonably available to the Company as of June 30, 2026 and through the date of this Form 10-Q.

On March 20, 2026, the Company completed a 3-for-2 split of its common stock, effected as a stock dividend entitling each shareholder of record to receive one additional share of common stock for every two shares owned. Additional shares issued as a result of the stock dividend were distributed after close of trading on March 20, 2026, to stockholders of record at the close of business on March 10, 2026. Cash was distributed in lieu of fractional shares based on the opening price of a share of common stock on March 11, 2026. All share and per share amounts contained herein were retroactively adjusted for this stock split in the Form 10-Q for the Quarterly Period Ended March 31, 2026. Accordingly, an amount equal to the par value of the increased shares resulting from the stock split was reclassified from Additional paid-in-capital to Common stock.

On May 26, 2026, the Company’s Board of Directors approved a 3-for-2 split of its common stock, effected as a stock dividend entitling each shareholder of record to receive one additional share of common stock for every two shares owned. Additional shares issued as a result of the stock dividend were distributed after close of trading on July 17, 2026, to stockholders of record at the close of business on July 7, 2026. Cash was distributed in lieu of fractional shares based on the opening price of a share of common stock on July 17, 2026. Although the stock split occurred subsequent to June 30, 2026, all share and per share amounts contained herein have been retroactively adjusted for this stock split, as a result of the stock split being effective prior to the issuance of the financial statements. The shares of common stock retain a par value of $0.01 per share. Accordingly, an amount equal to the par value of the increased shares resulting from the stock split was reclassified from Additional paid-in-capital to Common stock.

In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2023-07, Improvements to Reportable Segment Disclosures, which requires entities to enhance disclosures regarding segments, including significant segment expenses. The Company adopted ASU No. 2023-07 related to annual disclosure requirements effective with the fiscal 2025 Form 10-K, with newly required annual disclosures being included in Note 22 of the fiscal 2025 Form 10-K. The Company adopted ASU 2023-07 related to interim disclosure requirements effective with the first quarter fiscal 2026 10-Q filing and applied the updated disclosure requirements retrospectively to all periods presented. See Note 18 for more information.