Jefferies Financial Group Inc美股招股说明书(2026-05-01版)

The information in this preliminary pricing supplement is not complete and may be changed without notice. This preliminary pricingsupplement is not an offer to sell these securities, nor a solicitation of an offer to buy these securities, in any jurisdiction where the offering isnot permitted. PRELIMINARY PRICING SUPPLEMENT(to Product Supplement no. 5, dated October 23, 2023,Prospectus Supplement dated May 12, 2023and Prospectus dated May 12, 2023) $Jefferies Jefferies Financial Group Inc.Senior Autocallable Contingent Coupon Barrier Notes due June 1, 2032 Linked to the Worst-Performing of the Dow Jones Industrial Average®, the Nasdaq-100 Index®and the Russell 2000® Title of the Notes: Aggregate Principal Amount:Issue Price:Stated Principal Amount:Pricing Date:Original Issue Date:Coupon Observation Dates: Monthly, beginning on June 29, 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 Coupon Payment Dates: the accompanying product supplement.Monthly, beginning on March 1, 2027, as set forth on page PS-2. The Call Observation Dates are subject to postponement as described in the 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.May 27, 2032, subject to postponement as described in the accompanying product supplement. Valuation Date:Maturity Date:Underlying: June 1, 2032, which may be postponed if the Valuation Date is postponed as described in the accompanying product supplement.The worst-performing of the Dow Jones Industrial Average®(the “INDU”), the Nasdaq-100 Index®(the “NDX”) and the Russell 2000®Index (the“RTY”). Please see “The Underlyings” below.The Underlying with the lowest Observation Value or Final Value, as applicable, as compared to its Initial Value. Worst-Performing Underlying:Coupon Feature: Contingent Coupon Payments. The Notes will pay a Contingent Coupon Payment of $8.33 on the applicable Coupon Payment Date if the Observation Value of the Worst-Performing Underlying on the applicable monthly Coupon Observation Date is greater than or equal to its CouponBarrier.Autocallable Notes. The Notes will be automatically called if the Observation Value of the Worst-Performing Underlying on any Call Observation Call Feature: Date (beginning approximately nine months after the Pricing Date) is equal to or greater than its Call Value. If your Notes are called, you willreceive the Call Payment 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 youhold 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 thefinal Coupon Observation Date is greater than or equal to its Coupon Barrier.With respect to each Underlying, the Index Closing Value of the Underlying on the Pricing Date. Initial Value:Observation Value:Final Value:Coupon Barrier:Call Value:Threshold Value:Specified Currency:CUSIP/ISIN:Book-entry or Certificated Note:Business Day:Agent:Calculation Agent:Trustee:Estimated value on the PricingDate:Use of Proceeds:Listing:Conflict of Interest: Jefferies LLC, the broker-dealer subsidiary of Jefferies Financial Group Inc., is a member of FINRA and will participate in the distribution of thenotes being offered hereby. Accordingly, the offering is subject to the provisions of FINRA Rule 5121 relating to conflicts of interest and will beconducted in accordance with the requirements of Rule 5121. See “Conflict of Interest.”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. PER NOTETOTALPublic Offering Price100.00%$Underwriting Discounts and Commissions%1$Proceeds to Jefferies Financial Group Inc. (Before Expenses)%$1We