UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM 8-K

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CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

October 19, 2026

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JEFFERIES FINANCIAL GROUP INC.

(Exact name of registrant as specified in its charter)

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Registrant’s telephone number, including area code: 212-284-2300

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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 (see General Instruction A.2, below):

Securities registered pursuant to Section 12(b) 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. ☐

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On October 19, 2026, Jefferies Financial Group Inc. (“we” or “our”) held our 2026 Investor Meeting. A copy of the transcript of the meeting is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

The transcript contains the financial measures of ROTE and other Non-GAAP measures. A reconciliation of these Non-GAAP financial measures to the most directly comparable GAAP measures is provided in the presentation materials referred to during the meeting, a copy of which has been furnished as Exhibit 99.1 to the Company’s Form 8-K previously filed with the Securities and Exchange Commission (the “SEC”) on October 19, 2026.

The information in Item 7.01 of this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing or other document under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing or document.

Forward Looking Statements. Certain statements contained within the transcript included in this Current Report on Form 8-K may constitute “forward-looking statements,” within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Exchange Act and/or the Private Securities Litigation Reform Act of 1995, regarding us and our subsidiaries. These forward-looking statements reflect our current views relating to, among other things, future revenues, earnings, operations, and other financial results, and may include statements of future performance, plans, and objectives. Forward-looking statements may also include statements pertaining to our strategies for the future development of its business and products. These forward-looking statements are not historical facts and are based on management expectations, estimates, projections, beliefs and certain other assumptions, many of which, by their nature, are inherently uncertain and beyond management’s control. It is possible that the actual results may differ, possibly materially, from the anticipated results indicated in these forward-looking statements. Accordingly, readers are cautioned that any such forward-looking statements are not guarantees of future performance and are subject to certain risks, uncertainties and assumptions that are difficult to predict including, without limitation, the cautionary statements and risks set forth in our Annual and Quarterly Reports and other reports or documents filed with, or furnished to, the SEC from time to time, which are accessible on the SEC website at sec.gov. This information should also be read in conjunction with Jefferies Financial Group Inc. Consolidated Financial Statements and the Notes thereto contained in the Annual, Quarterly and Periodic Reports filed by the issuer that are also accessible on the SEC website at sec.gov. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. We do not undertake to update any forward-looking statements to reflect the impact of circumstances or events that arise after the date of such forward-looking statements.

(d)

Exhibit

SIGNATURE

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

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