Jefferies Financial Group Inc美股招股说明书(2026-07-20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 theoffering is not permitted. PRELIMINARY PRICING SUPPLEMENT(to Product Supplement no. 5, dated May 11, 2026,Prospectus Supplement dated May 11, 2026and Prospectus dated May 11, 2026) $Jefferies Jefferies Financial Group Inc.Senior Autocallable Contingent Coupon (With Memory) Barrier Notes due July 28, 2032 Linked to the Worst-Performing of the Common Stock of Fifth Third Bancorp, the Common Stock of Regions Financial Corporation, the Common Stock of Banc of California,Inc. and the Common Stock of The PNC Financial Services Group, Inc. The Senior Autocallable Contingent Coupon (With Memory) Barrier Notes due July 28, 2032 Linked to the Worst-Performing of the Common Stock of Fifth Third Bancorp, the Common Stock of RegionsFinancial Corporation, the Common Stock of Banc of California, Inc. and the Common Stock of The PNC Financial Services Group, Inc. (the “Notes”) are senior unsecured obligations of Jefferies FinancialGroup Inc.The Notes have the terms described in the accompanying product supplement, prospectus supplement and prospectus, as supplemented or modified by this pricing supplement.The Notesare issued as part of our Series A Global Medium-Term Notes program.All payments are subject to our credit risk.If we default on our obligations, you could lose some or a significant portion of your investment.These Notes are not secured obligations and you will not have any security interest in, or otherwise have any access to, any Underlying.SUMMARY OF TERMS Senior Autocallable Contingent Coupon (With Memory) Barrier Notes due July 28, 2032 Linked to the Worst-Performing of the Common Stock of FifthThird Bancorp, the Common Stock of Regions Financial Corporation, the Common Stock of Banc of California, Inc. and the Common Stock of The PNCFinancial Services Group, Inc.$. We may increase the Aggregate Principal Amount prior to the Original Issue Date but are not required to do so. Aggregate Principal Amount:Issue Price:Stated Principal AmountPricing Date:Original Issue Date:Coupon Observation Dates: Quarterly, beginning on October 23, 2026, as set forth beginning on page PS-2. The Coupon Observation Dates are subject to postponement asdescribed in the accompanying product supplement.As set forth beginning on page PS-2. The Coupon Payment Dates may be postponed if the related Coupon Observation Date is postponed as described Coupon Payment Dates: in the accompanying product supplement.Quarterly, beginning on October 23, 2026, as set forth beginning on page PS-2. The Call Observation Dates are subject to postponement as described in Call Observation Dates: the accompanying product supplement.As set forth beginning 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 23, 2032, subject to postponement as described in the accompanying product supplement. Valuation Date:Maturity Date:Underlying: July 28, 2032, which may be postponed if the Valuation Date is postponed as described in the accompanying product supplement. The worst-performing of the common stock of Fifth Third Bancorp (Nasdaq symbol: “FITB”), the common stock of Regions Financial Corporation (NYSEsymbol: “RF”), the common stock of Banc of California, Inc. (NYSE symbol: “BANC”) and the common stock of The PNC Financial Services Group, Inc.(NYSE symbol: “PNC”).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 (with Memory). The Notes will pay a Contingent Coupon Payment (with Memory) on the applicable Coupon Payment Date if the Observation Value of the Worst-Performing Underlying on the applicable quarterly Coupon Observation Date is greater than or equal to its CouponBarrier. The Contingent Coupon Payment (with Memory) payable on any Coupon Payment Date will be calculated according to the following formula: (i)theproductof the Contingent Coupon Payment (with Memory) applicable to a single Coupon Payment Date and the number of Coupon Payment Datesthat have occurred up to the relevant Coupon Payment Date (inclusive of the relevant Coupon Payment Date)minus(ii) thesumof all ContingentCoupon Payments (with Memory) previously paid. The Contingent Coupon Payment (with Memory) applicable to a single Coupon Payment Date is$30.00.Autocallable Notes. The Notes will be automatically called if the Observation Value of the Worst-Performing Underlying on any Call Observation Date (beginning approximately three months after the Pricing Date) is equal to or greater than its Call Value.If your Not