Jefferies Financial Group Inc美股招股说明书(2026-06-23版)

Prospectus Supplement dated May 11, 2026and Prospectus dated May 11, 2026) $9,000,000Jefferies Jefferies Financial Group Inc.Senior Autocallable Contingent Coupon Barrier Notes due June 24, 2031 Linked to the Worst-Performing of the Nasdaq-100 Index®, the Russell 2000®Index and the S&P 500®IndexThe Senior Autocallable Contingent Coupon Barrier Notes due June 24, 2031 Linked to the Worst-Performing of the Nasdaq-100 Index®, the Russell 2000®Index and the S&P 500®Index All payments are subject to our credit risk. If we default on our obligations, you could lose some or a significant portion of your investment. These Notes are not securedobligations and you will not have any security interest in, or otherwise have any access to, any Underlying or the securities represented by any Underlying. Monthly, beginning on July 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.Quarterly, beginning on December 18, 2026, 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. June 24, 2031, which may be postponed if the Valuation Date is postponed as described in the accompanying product supplement.The worst-performing of the Nasdaq-100 Index®(the “NDX”), the Russell 2000®Index (the “RTY”) and the S&P 500®Index (the “SPX”). Please see “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 $9.33 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 (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. 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.30,406.19 with respect to the NDX; 2,979.765with respect to the RTY; and 7,500.58 with respect to the SPX With respect to each Underlying, the Index Closing Value of the Underlying on the applicable Coupon Observation Date or Call Observation Date.With respect to each Underlying, the Index Closing Value of the Underlying on the Valuation Date.19,764.02 with respect to the NDX (65% of its Initial Value, rounded to two decimal places); 1,936.847 with respect to the RTY (65% of its Initial Value, rounded to three decimal places); and 4,875.38 with respect to the SPX (65% of its Initial Value, rounded to two decimal places) Call Value: The Notes will be our senior unsecured obligations and will rank equally with our other senior unsecured indebtedness.Investing in the Notes involves risks that are described in the “Risk Factors” section beginning on page PS-7 of this pricing supplement. 1We or Jefferies LLC will pay various discounts and commissions to dealers of up to 0.55% per Note depending on market conditions. See “Supplemental Plan of Distribution” on page PS-27 of this document Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this pricing supplement or theaccompanying product supplement, prospectus or prospectus supplement is truthful or complete. Any repres