Jefferies Financial Group Inc美股招股说明书(2026-07-22版)

Prospectus Supplement dated May 11, 2026and Prospectus dated May 11, 2026) $4,707,000Jefferies Jefferies Financial Group Inc.Senior Autocallable Contingent Coupon Barrier Notes due July 23, 2032 Monthly, beginning on August 20, 2026, as set forth on page PS-2. The Coupon Observation Dates are subject to postponement as described in theaccompanying product supplement.As set forth on page PS-2. The Coupon Payment Dates may be postponed if the related Coupon Observation Date is postponed as described in the accompanying product supplement.Monthly, beginning on January 20, 2027, as set forth on page PS-2. The Call Observation Dates are subject to postponement as described in the Coupon Payment Dates: Call Observation Dates: accompanying product supplement.As set forth on page PS-2. The Call Payment Dates may be postponed if the related Call Observation Date is postponed as described in the Call Payment Dates: accompanying product supplement. July 20, 2032, subject to postponement as described in the accompanying product supplement. The worst-performing of the Nasdaq-100 Index®(the “NDX”), the VanEck®Semiconductor ETF (the “SMH”) and the S&P 500®Index (the “SPX”). Pleasesee “The Underlyings” below.Worst-Performing Underlying:The Underlying with the lowest Observation Value or Final Value, as applicable, as compared to its Initial Value. Contingent Coupon Payments. The Notes will pay a Contingent Coupon Payment of $13.96 on the applicable Coupon Payment Date if the ObservationValue of the Worst-Performing Underlying on the applicable monthly Coupon Observation Date is greater than or equal to its Coupon Barrier. Autocallable Notes. The Notes will be automatically called if the Observation Value of the Worst-Performing Underlying on any Call Observation Date Call Feature: (beginning approximately six months after the Pricing Date) is equal to or greater than its Call Value. If your Notes are called, you will receive the CallPayment on the applicable Call Payment Date, and no further amounts will be payable on the Notes.The Stated Principal Amount plus any Contingent Coupon Payment that may otherwise be due on the applicable Call Payment Date. Call Payment:Payment at Maturity: If the Final Value of the Worst-Performing Underlying is greater than or equal to its Threshold Value, you will receive for each Note that you hold a Payment at Maturity that is equal to the Stated Principal AmountIf the Final Value of the Worst-Performing Underlying is less than its Threshold Value, you will receive for each Note that you hold a Payment at Maturity that is less than the Stated Principal Amount of each Note that will equal: In this scenario the Payment at Maturity will be less than the Stated Principal Amount and you could lose some or all of your investment. The Payment at Maturity will also include the final Contingent Coupon Payment if the Observation Value of the Worst-Performing Underlying on the finalCoupon Observation Date is greater than or equal to its Coupon Barrier.$558.83 with respect to the SMH; 28,604.23 with respect to the NDX; and 7,443.28 with respect to the SPX Initial Value:Observation Value: With respect to each of theNDX and the SPX, the Index Closing Value of the Underlying on the applicable Coupon Observation Date or Call ObservationDate.With respect to theSMH, the ETF Closing Price of the Underlyingtimesthe Adjustment Factor on the Valuation Date. With respect to each of theNDX and the SPX, the Index Closing Value of the Underlying on the Valuation Date.$335.30 with respect to the SMH (60% of its Initial Value, rounded to two decimal places); 17,162.54 with respect to the NDX (60% of its Initial Value, Coupon Barrier: rounded to two decimal places); and 4,465.97 with respect to the SPX (60% of its Initial Value, rounded to two decimal places) $558.83 with respect to the SMH (100% of its Initial Value); 28,604.23 with respect to the NDX (100% of its Initial Value); and 7,443.28 with respect to theSPX (100% of its Initial Value)$335.30 with respect to the SMH (60% of its Initial Value, rounded to two decimal places); 17,162.54 with respect to the NDX (60% of its Initial Value, Call Value: Threshold Value: rounded to two decimal places); and 4,465.97 with respect to the SPX (60% of its Initial Value, rounded to two decimal places)Initially 1.0 with respect to the SMH, subject to adjustment for certain events affecting the Underlying. See “—Antidilution Adjustments for Exchange Traded Funds” in the accompanying product supplement.U.S. dollars Adjustment Factor: NoneJefferies LLC, the broker-dealer subsidiary of Jefferies Financial Group Inc., is a member of FINRA and will participate in the distribution of the notes beingoffered hereby. Accordingly, the offering is subject to the provisions of FINRA Rule 5121 relating to conflicts of interest and will be conducted in accordancewith the requirements of Rule 5121. See “Conflict of Interest.”The Notes will be our senior unsecu