424B5 1 ef20082977_424b5.htm DEAL 1282

Filed Pursuant to Rule 424(b)(5)

Registration No. 333-295759

The information in this preliminary pricing supplement is not complete and may be changed without notice. This preliminary pricing supplement is not an offer to sell these securities, nor a solicitation of an offer to buy these securities, in any jurisdiction where the offering is not permitted.

AMENDMENT NO. 1 TO PRELIMINARY PRICING SUPPLEMENT

(to Product Supplement no. 5, dated May 11, 2026,

Prospectus Supplement dated May 11, 2026

and Prospectus dated May 11, 2026)

SUBJECT TO COMPLETION, DATED September 29, 2026

Jefferies

Jefferies Financial Group Inc.

Senior Autocallable Contingent Coupon Barrier Notes due October 18, 2032

Linked to the Worst-Performing of the Dow Jones Industrial Average^®, the Russell 2000^® Index and the S&P 500^® Index

The Senior Autocallable Contingent Coupon Barrier Notes due October 18, 2032 Linked to the Worst-Performing of the Dow Jones Industrial Average^®, the Russell 2000^® Index and the S&P 500^® Index (the “Notes”) are senior unsecured obligations of Jefferies Financial Group 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 Notes are 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 or the securities represented by any Underlying.

SUMMARY OF TERMS

Issuer:	Jefferies Financial Group Inc.
Title of the Notes:	Senior Autocallable Contingent Coupon Barrier Notes due October 18, 2032 Linked to the Worst-Performing of the Dow Jones Industrial Average^®, the Russell 2000^® Index and the S&P 500^® Index
Aggregate Principal Amount:	$ . We may increase the Aggregate Principal Amount prior to the Original Issue Date but are not required to do so.
Issue Price:	$1,000 per Note
Stated Principal Amount:	$1,000 per Note
Pricing Date:	October 9, 2026
Original Issue Date:	October 19, 2026 (5 Business Days after the Pricing Date)
Coupon Observation Dates:	Quarterly, beginning on January 11, 2027, as set forth on page PS-2. The Coupon Observation Dates are subject to postponement as described in the accompanying product supplement.
Coupon Payment Dates:	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.
Call Observation Dates:	Quarterly, beginning on October 11, 2027, as set forth on page PS-2. The Call Observation Dates are subject to postponement as described in the accompanying product supplement.
Call Payment Dates:	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 accompanying product supplement.
Valuation Date:	October 11, 2032, subject to postponement as described in the accompanying product supplement.
Maturity Date:	October 18, 2032, which may be postponed if the Valuation Date is postponed as described in the accompanying product supplement.
Underlying:	The worst-performing of the Dow Jones Industrial Average^® (the “INDU”), 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.
Coupon Feature:	Contingent Coupon Payments. The Notes will pay a Contingent Coupon Payment of $24.13 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 Coupon Barrier.
Call Feature:	Autocallable Notes. The Notes will be automatically called if the Observation Value of the Worst-Performing Underlying on any Call Observation Date (beginning approximately one year after the Pricing Date) is equal to or greater than its Call Value. If your Notes are called, you will receive the Call Payment on the applicable Call Payment Date, and no further amounts will be payable on the Notes.
Call Payment:	The Stated Principal Amount plus any Contingent Coupon Payment that may otherwise be due on the applicable Call Payment Date.
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 Amount If 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 final Coupon Observation Date is greater than or equal to its Coupon Barrier.
Initial Value:	With respect to each Underlying, the Index Closing Value of the Underlying on the Pricing Date.
Observation Value:	With respect to each Underlying, the Index Closing Value of the Underlying on the applicable Coupon Observation Date or Call Observation Date.
Final Value:	With respect to each Underlying, the Index Closing Value of the Underlying on the Valuation Date.
Coupon Barrier:	With respect to each Underlying, 70% of its Initial Value
Call Value:	With respect to each Underlying, 100% of its Initial Value
Threshold Value:	With respect to each Underlying, 70% of its Initial Value.
Specified Currency:	U.S. dollars
CUSIP/ISIN:	47234KEQ3 / US47234KEQ31
Book-entry or Certificated Note:	Book-entry
Business Day:	New York
Agent:	Jefferies LLC, a wholly-owned subsidiary of Jefferies Financial Group Inc. See “Supplemental Plan of Distribution.”
Calculation Agent:	Jefferies Financial Services, Inc., a wholly owned subsidiary of Jefferies Financial Group Inc.
Trustee:	The Bank of New York Mellon
Estimated value on the Pricing Date:	Approximately $978.40 per Note, or within $30.00 of that estimate. Please see “The Notes” below.
Use of Proceeds:	General corporate purposes
Listing:	None
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 the notes being offered hereby. Accordingly, the offering is subject to the provisions of FINRA Rule 5121 relating to conflicts of interest and will be conducted 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 NOTE	TOTAL
Public Offering Price	100.00%	$
Underwriting Discounts and Commissions	%¹	$
Proceeds to Jefferies Financial Group Inc. (Before Expenses)	%	$

¹ An affiliate of the Issuer will pay a structuring fee of up to $6.50 per Note in connection with the distribution of the Notes to other registered broker-dealers.

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 the accompanying product supplement, prospectus or prospectus supplement is truthful or complete. Any representation to the contrary is a criminal offense.

As used in this pricing supplement, “we,” “us” and “our” refer to Jefferies Financial Group Inc., unless the context requires otherwise.

We will deliver the Notes in book-entry form only through The Depository Trust Company on or about October 19, 2026 against payment in immediately available funds.

Jefferies

Pricing supplement dated ,2026.

You should read this pricing supplement together with the related product supplement, prospectus and prospectus supplement, each of which can be accessed via the hyperlinks below, before you decide to invest.

Product Supplement No. 5, dated May 11, 2026 Prospectus Supplement dated May 11, 2026 and Prospectus dated May 11, 2026

TABLE OF CONTENTS

PAGE

PRICING SUPPLEMENT

SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS	PS-ii
RECENT DEVELOPMENTS	PS-1
THE NOTES	PS-2
HOW THE NOTES WORK	PS-5
RISK FACTORS	PS-7
THE UNDERLYINGS	PS-12
HEDGING	PS-20
SUPPLEMENTAL DISCUSSION OF U.S. FEDERAL INCOME TAX CONSEQUENCES	PS-21
SUPPLEMENTAL PLAN OF DISTRIBUTION	PS-26
CONFLICT OF INTEREST	PS-30
LEGAL MATTERS	PS-31
EXPERTS	PS-32

You should rely only on the information contained in or incorporated by reference in this pricing supplement and the accompanying product supplement, prospectus and prospectus supplement. We have not authorized anyone to provide you with different information. We are not making an offer of these securities in any state where the offer is not permitted. You should not assume that the information contained in this pricing supplement or the accompanying product supplement, prospectus or prospectus supplement is accurate as of any date later than the date on the front of this pricing supplement.

PS-i

Coupon Observation Dates	Coupon Payment Dates	Call Observation Dates	Call Payment Dates
January 11, 2027	January 19, 2027
April 9, 2027	April 16, 2027
July 9, 2027	July 16, 2027
October 11, 2027	October 18, 2027	October 11, 2027	October 18, 2027
January 10, 2028	January 18, 2028	January 10, 2028	January 18, 2028
April 10, 2028	April 18, 2028	April 10, 2028	April 18, 2028
July 10, 2028	July 17, 2028	July 10, 2028	July 17, 2028
October 9, 2028	October 16, 2028	October 9, 2028	October 16, 2028
January 9, 2029	January 17, 2029	January 9, 2029	January 17, 2029
April 9, 2029	April 16, 2029	April 9, 2029	April 16, 2029
July 9, 2029	July 16, 2029	July 9, 2029	July 16, 2029
October 9, 2029	October 16, 2029	October 9, 2029	October 16, 2029
January 9, 2030	January 16, 2030	January 9, 2030	January 16, 2030
April 9, 2030	April 16, 2030	April 9, 2030	April 16, 2030
July 9, 2030	July 16, 2030	July 9, 2030	July 16, 2030
October 9, 2030	October 16, 2030	October 9, 2030	October 16, 2030
January 9, 2031	January 16, 2031	January 9, 2031	January 16, 2031
April 9, 2031	April 17, 2031	April 9, 2031	April 17, 2031
July 9, 2031	July 16, 2031	July 9, 2031	July 16, 2031
October 9, 2031	October 16, 2031	October 9, 2031	October 16, 2031
January 9, 2032	January 16, 2032	January 9, 2032	January 16, 2032
April 9, 2032	April 16, 2032	April 9, 2032	April 16, 2032
July 9, 2032	July 16, 2032	July 9, 2032	July 16, 2032
October 11, 2032	October 18, 2032

	Stated Principal Amount:		$1,000 per Note.
	Hypothetical Initial Value of the Worst-Performing Underlying:		100
	Hypothetical Coupon Barrier of the Worst- Performing Underlying:		70
	Hypothetical Threshold Value of the Worst- Performing Underlying:		70
	Contingent Coupon Payment:		$24.13 per Note

Final Value of the Worst- Performing Underlying	Payment at Maturity per Note	Return on the Notes
0.00	$0.00	-100.00%
50.00	$500.00	-50.00%
69.99	$699.90	-30.01%
70.00⁽¹⁾	$1,024.13	2.413%
80.00	$1,024.13	2.413%
90.00	$1,024.13	2.413%
100.00	$1,024.13	2.413%
110.00	$1,024.13	2.413%
150.00	$1,024.13	2.413%