Jefferies Financial Group Inc美股招股说明书(2026-07-10版)

The information in this preliminary pricing supplement is not complete and may be changed without notice. This preliminary pricing supplement is not an offer tosell these securities, nor a solicitation of an offer to buy these securities, in any jurisdiction where the offering is not permitted.PRELIMINARY PRICING SUPPLEMENT(to Prospectus Supplement datedMay 11, 2026 and Prospectus datedMay 11, 2026)SUBJECT TO COMPLETION, DATED July 9, 2026 $Jefferies Jefferies Financial Group Inc.Senior Callable Fixed to Floating Rate Range Accrual Notes Linked to the 10-Year CMT Rate due July 28, 2036 We have the right to redeem the Notes, in whole or in part, on each Optional Redemption Date. Subject to our redemption right, interest will accrue and be payable monthly, in arrears, (i)from, and including, the Original Issue Date to, but excluding, July 28, 2027 at a rate of 10.00% per annum and (ii) from, and including, July 28, 2027 to, but excluding, the stated maturitydate (July 28, 2036), at a variable rate per annum equal to (a) the Contingent Rate of 10.00% per annum times (b) the quotient ofNdivided byD, whereN= the number of calendar daysduring the applicable Interest Payment Period on which the Accrual Provision (defined below) is satisfied andD= the total number of calendar days in such Interest Payment Period. Allpayments on the Notes, including the repayment of principal, are subject to the credit risk of Jefferies Financial Group Inc. SUMMARY OF TERMS Issuer:Title of the Notes:Aggregate Principal Amount:Issue Price: Senior Callable Fixed to Floating Rate Range Accrual Notes Linked to the 10-Year CMT Rate due July 28, 2036$. We may increase the Aggregate Principal Amount prior to the Original Issue Date but are not required to do so. At variable prices. The Notes will be offered at a price equal to 100% of the Stated Principal Amount per Note until the initial pricing date, which is, 2026. Thereafter, the Notes will be offered from time to time in one or more negotiated transactions at varying prices to be determined at thetime of each sale, which may be at market prices prevailing, at prices related to such prevailing prices or at negotiated prices, subject to amaximum price of 100% of the Stated Principal Amount per Note.$1,000 per Note Stated Principal Amount:Pricing Date:Original Issue Date:Maturity Date:Interest Accrual Date:Payment at Maturity:10-Year CMT Rate: July, 2026July 28, 2026 (Business Days after the Pricing Date)July 28, 2036, subject to our redemption right.July 28, 2026 The Payment at Maturity per Note will be the Stated Principal Amount plus accrued and unpaid interest, if any. With respect to any Accrual Determination Date, the yield for United States Treasury securities at “constant maturity” with a designated maturity of10 years, determined as set forth under “The Notes” below. Interest Rate: From and including the Original Issue Date to, but excluding, July 28, 2027: 10.00% per annum. From, and including, July 28, 2027 to, but excluding, July 28, 2036 (the “Floating Interest Rate Period”): For each Interest Payment Period, avariable rate per annum equal to (i) the Contingent Rate times (ii) the quotient ofNdivided byD, whereN= the number of calendar days duringthe applicable Interest Payment Period on which the Accrual Provision is satisfied andD= the total number of calendar days in such InterestPayment Period. The Interest Rate applicable to each Interest Payment Period during the Floating Interest Rate Period will not be greater than10.00% per annum or less than 0.00% per annum.It is possible that you could receive little or no interest on the Notes during the Floating InterestRate Period. Accrual Provision: For each Interest Payment Period during the Floating Interest Rate Period, the Accrual Provision shall be deemed to have been satisfied for eachcalendar day during such Interest Payment Period on which the 10-Year CMT Rate, as determined on the Accrual Determination Date relating tosuch calendar day, is less than or equal to 5.00%. If the 10-Year CMT Rate, as determined on the Accrual Determination Date relating to suchcalendar day, is greater than 5.00%, then the Accrual Provision shall be deemed not to have been satisfied for such calendar day. With respect to any calendar day during an Interest Payment Period during the Floating Interest Rate Period that is also a U.S. GovernmentSecurities Business day, such calendar day. With respect to any calendar day during an Interest Payment Period during the Floating Interest RatePeriod that is not also a U.S. Government Securities Business Day, the immediately prior U.S. Government Securities Business Day.Notwithstanding the foregoing, for all calendar days in the Exclusion Period, the Accrual Determination Date will be the first U.S. GovernmentSecurities Business Day that precedes such Exclusion Period. The Accrual Provision will be deemed to have not been satisfied for the calendardays during the Exclusion Period if th