SEC Form 424B5 filed by Jefferies Financial Group Inc.

Filed Pursuant to Rule 424(b)(5)
Registration No. 333-271881

PRELIMINARY PRICING SUPPLEMENT  (to Product Supplement no. 5, dated October 23, 2023, Prospectus Supplement dated May 12, 2023 and Prospectus dated May 12, 2023)

SUBJECT TO COMPLETION, DATED January 14, 2026

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Issuer:	Jefferies Financial Group Inc.
Title of the Notes:	Senior Autocallable Barrier Notes due February 4, 2030 Linked to the Worst-Performing of the Dow Jones Industrial Average®, the Nasdaq-100 Index® and the Russell 2000® 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:	January 30, 2026
Original Issue Date:	February 4, 2026 (3 Business Days after the Pricing Date)
Call Observation Dates:	Semiannually, beginning on February 1, 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:	January 30, 2030 (which is also the final Call Observation Date), subject to postponement as described in the accompanying product supplement.
Maturity Date:	February 4, 2030, 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 Nasdaq-100 Index® (the “NDX”) and the Russell 2000® Index (the “RTY”). 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.
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 applicable 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 the applicable Call Premium.
Call Premium:	The Call Premium applicable to each Call Observation Date is set forth on page PS-2 and reflects a return of approximately 12% per annum. The Notes are “Snowball Coupon Notes” for purposes of the accompanying product supplement and, for purposes of this pricing supplement, references in the accompanying product supplement to “Snowball Coupon Payment” shall be deemed to refer to “Call Premium”.
Payment at Maturity:	If the Notes are not called prior to maturity and 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 Notes are not called prior to maturity and 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.
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 Call Observation Date.
Final Value:	With respect to each Underlying, the Index Closing Value of the Underlying on the Valuation Date.
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:	47233YTF2 / US47233YTF24
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 $961.70 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.”

TABLE OF CONTENTS

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.

SPECIAL NOTE ON FORWARD-LOOKING STATEMENTS

This pricing supplement and the accompanying product supplement, prospectus and prospectus supplement contain or incorporate by reference “forward-looking statements” within the meaning of the safe harbor provisions of Section 27A of the Securities Act of 1933 (the “Securities Act”) and Section 21E of the Securities Exchange Act of 1934. These forward-looking statements are not statements of historical fact and represent only our belief as of the date such statements are made. There are a variety of factors, many of which are beyond our control, which affect our operations, performance, business strategy and results and could cause actual reported results and performance to differ materially from the performance and expectations expressed in these forward-looking statements. These factors include, but are not limited to, financial market volatility, actions and initiatives by current and future competitors, general economic conditions, controls and procedures relating to the close of the quarter, the effects of current, pending and future legislation or rulemaking by regulatory or self-regulatory bodies, regulatory actions, and the other risks and uncertainties that are outlined in our Annual Report on Form 10-K for the fiscal year ended November 30, 2024 filed with the U.S. Securities and Exchange Commission, or the SEC, on January 28, 2025 (the “Annual Report on Form 10-K”) and in our Quarterly Reports on Form 10-Q for the quarterly periods ended February 28, 2025, May 31, 2025 and August 31, 2025 filed with the SEC on April 9, 2025, July 9, 2025 and October 9, 2025, respectively. You are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. We do not undertake to update forward-looking statements to reflect the impact of circumstances or events that arise after the date of the forward-looking statements.

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Investment Banking Net Revenues of $1.19 billion

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Capital Markets Net Revenues of $692 million

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Asset Management Net Revenues of $187 million

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Pre-Tax Earnings from Continuing Operations of $253 million

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Net Earnings Attributable to Common Shareholders of $191 million (reflects a 14.8% effective tax rate)

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Investment Banking Net Revenues of $3.79 billion

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Capital Markets Net Revenues of $2.82 billion

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Asset Management Net Revenues of $710 million

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Pre-Tax Earnings from Continuing Operations of $871 million

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Net Earnings Attributable to Common Shareholders of $631 million (reflects a 21.2% effective tax rate)

The above preliminary financial data included in this prospectus supplement has been prepared by and is the responsibility of Jefferies’ management. Deloitte & Touche LLP, Jefferies’ independent public accountant, has not audited, reviewed, compiled or performed any procedures with respect to the accompanying preliminary financial data. Accordingly, Deloitte & Touche LLP does not express an opinion or any other form of assurance with respect thereto.

THE NOTES

The Notes are senior unsecured obligations of Jefferies Financial Group Inc. The Aggregate Principal Amount of the Notes is $          . The Notes will mature on February 4, 2030. 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 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 applicable Call Payment on the applicable Call Payment Date, and no further amounts will be payable on the Notes. If your Notes are not called, at maturity, if the Final Value of the Worst-Performing Underlying is greater than or equal to its Threshold Value, you will receive the Stated Principal Amount; otherwise, your Notes are subject to 1-to-1 downside exposure to decreases in the Worst-Performing Underlying from its Initial Value, with up to 100% of the Stated Principal Amount at risk. For more information on the Call Feature and the Payment at Maturity please see “Summary of Terms” on the cover page of this pricing supplement. All payments on the Notes are subject to our credit risk. The Notes are issued as part of our Series A Global Medium-Term Notes program.

The Stated Principal Amount of each Note is $1,000. The Issue Price will equal 100% of the Stated Principal Amount per Note. This price includes costs associated with issuing, selling, structuring and hedging the Notes, which are borne by you, and, consequently, the estimated value of the Notes on the Pricing Date will be less than the Issue Price. We estimate that the value of each Note on the Pricing Date will be approximately $961.70, or within $30.00 of that estimate. Our estimate of the value of the Notes as determined on the Pricing Date will be set forth in the final pricing supplement.

If any Call Payment Date or the Maturity Date occurs on a day that is not a Business Day, then the payment owed on such date will be postponed until the next succeeding Business Day, and no interest will accrue as a result of such delay.

Capitalized terms used but not defined in this pricing supplement have the meanings set forth in the accompanying product supplement, prospectus supplement or prospectus, as applicable. If the terms described herein are inconsistent with those described in the accompanying product supplement, prospectus supplement or prospectus, the terms described herein shall control.

Valuation of the Notes

Jefferies LLC calculated the estimated value of the Notes set forth on the cover page of this pricing supplement based on its proprietary pricing models at that time. Jefferies LLC’s proprietary pricing models generated an estimated value for the Notes by estimating the value of a hypothetical package of financial instruments that would replicate the payout on the Notes, which consists of a fixed-income bond (the “bond component”) and one or more derivative instruments underlying the economic terms of the Notes (the “derivative component”). In calculating the estimated value of the derivative component, Jefferies LLC estimated future cash flows based on a proprietary derivative-pricing model that is in turn based on various inputs, including the factors described under “Risk Factors—The estimated value of the Notes was determined for us by our subsidiary using proprietary pricing models” below. These inputs may be market-observable or may be based on assumptions made by Jefferies LLC in its discretionary judgment. Estimated cash flows on the bond and derivative components were discounted using a discount rate based on our internal funding rate.

The estimated value of the Notes is a function of the terms of the Notes and the inputs to Jefferies LLC’s proprietary pricing models. The range for the estimated value of the Notes set forth on the cover page of this preliminary pricing supplement reflects uncertainty on the date of this preliminary pricing supplement about the inputs to Jefferies LLC’s proprietary pricing models on the Pricing Date.

Since the estimated value of the Notes is a function of the underlying assumptions and construction of Jefferies LLC’s proprietary derivative-pricing model, modification to this model will impact the estimated value calculation. Jefferies LLC’s proprietary models are subject to ongoing review and modification, and Jefferies LLC may change them at any time and for a variety of reasons. In the event of a model change, prior descriptions of the model and computations based on the older model will be superseded, and calculations of estimated value under the new model may differ significantly from those under the older model. Further, model changes may cause a larger impact on the estimated value of a note with a particular return formula than on a similar note with a different return formula. For example, to the extent a return formula contains leverage, model changes may cause a larger impact on the estimated value of that note than on a similar note without such leverage.

For an initial period following the issuance of the Notes (the “Temporary Adjustment Period”), the value that will be indicated for the Notes on any brokerage account statements prepared by Jefferies LLC or its affiliates (which value Jefferies LLC may also publish through one or more financial information vendors) will reflect a temporary upward adjustment from the price or value that would otherwise be determined. This temporary upward adjustment represents amounts which may include, but are not limited to, profits, fees, underwriting discounts and commissions and hedging and other costs expected to be paid or realized by Jefferies LLC or its affiliates, or other unaffiliated brokers or dealers, over the term of the Notes. The amount of this temporary upward adjustment will decline to zero on a straight-line basis over the Temporary Adjustment Period.

The relationship between the estimated value on the Pricing Date and the secondary market price of the Notes

The price at which Jefferies LLC purchases the Notes in the secondary market, absent changes in market conditions, including those related to interest rates and the Underlyings, may vary from, and be lower than, the estimated value on the Pricing Date, because the secondary market price takes into account our secondary market credit spread as well as the bid-offer spread that Jefferies LLC would charge in a secondary market transaction of this type, the costs of unwinding the related hedging transactions and other factors.

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

(1)

This hypothetical Final Value of the Worst-Performing Underlying corresponds to its Threshold Value.

RTY Index Daily Closing Levels

This historical data on the Underlying is not necessarily indicative of the future performance of the Underlying or what the value of the Notes may be. Any historical upward or downward trend in the level of the Underlying during any period set forth above is not an indication that the level of the Underlying is more or less likely to increase or decrease at any time over the term of the Notes.

Before investing in the Notes, you should consult publicly available sources for the levels of the Russell 2000^® Index.

License Agreement

“Russell 2000^®” and “Russell 3000^®” are trademarks of FTSE Russell and have been licensed for use by Jefferies Financial Group Inc. (the “Issuer”). The securities are not sponsored, endorsed, sold, or promoted by FTSE Russell, and FTSE Russell makes no representation regarding the advisability of investing in the securities.

FTSE Russell and the Issuer have entered into a non-exclusive license agreement providing for the license to the Issuer and its affiliates in exchange for a fee, of the right to use indices owned and published by FTSE Russell in connection with some securities, including the securities. The license agreement provides that the following language must be stated in this pricing supplement:

The securities are not sponsored, endorsed, sold, or promoted by FTSE Russell. FTSE Russell makes no representation or warranty, express or implied, to the holders of the securities or any member of the public regarding the advisability of investing in securities generally or in the securities particularly or the ability of the RTY to track general stock market performance or a segment of the same. FTSE Russell’s publication of the RTY in no way suggests or implies an opinion by FTSE Russell as to the advisability of investment in any or all of the securities upon which the RTY is based. FTSE Russell’s only relationship to the Issuers is the licensing of certain trademarks and trade names of FTSE Russell and of the RTY, which is determined, composed, and calculated by FTSE Russell without regard to the Issuer or the securities. FTSE Russell is not responsible for and has not reviewed the securities nor any associated literature or publications and FTSE Russell makes no representation or warranty express or implied as to their accuracy or completeness, or otherwise. FTSE Russell reserves the right, at any time and without notice, to alter, amend, terminate, or in any way change the RTY. FTSE Russell has no obligation or liability in connection with the administration, marketing, or trading of the securities.

FTSE RUSSELL DOES NOT GUARANTEE THE ACCURACY AND/OR THE COMPLETENESS OF THE RTY OR ANY DATA INCLUDED THEREIN AND FTSE RUSSELL SHALL HAVE NO LIABILITY FOR ANY ERRORS, OMISSIONS, OR INTERRUPTIONS THEREIN. FTSE RUSSELL MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY THE ISSUER, HOLDERS OF THE SECURITIES, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE RTY OR ANY DATA INCLUDED THEREIN. FTSE RUSSELL MAKES NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE RTY OR ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL FTSE RUSSELL HAVE ANY LIABILITY FOR ANY

SPECIAL, PUNITIVE, INDIRECT, OR CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS), EVEN IF NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.

HEDGING

In order to meet our payment obligations on the Notes, at the time we issue the Notes, we may choose to enter into certain hedging arrangements (which may include call options, put options or other derivatives) with one or more of our subsidiaries. The terms of these hedging arrangements are determined based upon terms provided by our subsidiaries, and take into account a number of factors, including our creditworthiness, interest rate movements, the volatility of the Underlyings, the tenor of the Notes and the hedging arrangements. The economic terms of the Notes depend in part on the terms of these hedging arrangements.

The hedging arrangements may include hedging related charges, reflecting the costs associated with, and our subsidiaries’ profit earned from, these hedging arrangements. Since hedging entails risk and may be influenced by unpredictable market forces, actual profits or losses from these hedging transactions may be more or less than this amount.

For further information, see “Risk Factors” beginning on page PS-6 of this pricing supplement.

SUPPLEMENTAL DISCUSSION OF U.S. FEDERAL INCOME TAX CONSEQUENCES

The following section supplements the discussion of U.S. federal income taxation in the accompanying product supplement.

The following section is the opinion of Sidley Austin LLP, our counsel. In addition, it is the opinion of Sidley Austin LLP that the characterization of the Notes for U.S. federal income tax purposes that will be required under the terms of the Notes, as discussed below, is a reasonable interpretation of current law.

This section does not apply to you if you are a member of a class of holders subject to special rules, such as:

Although this section is based on the U.S. Internal Revenue Code of 1986, as amended (the “Code”), its legislative history, existing and proposed regulations under the Code, published rulings and court decisions, all as currently in effect, no statutory, judicial or administrative authority directly addresses how your Notes should be treated for U.S. federal income tax purposes, and as a result, the U.S. federal income tax consequences of your investment in your Notes are uncertain. Moreover, these laws are subject to change, possibly on a retroactive basis.

You should consult your tax advisor concerning the U.S. federal income tax and any other applicable tax consequences of your investments in the Notes, including the application of state, local or other tax laws and the possible effects of changes in federal or other tax laws.

U.S. Holders

This section applies to you only if you are a U.S. Holder that holds your Notes as a capital asset for tax purposes. You are a “U.S. Holder” if you are a beneficial owner of each of your Notes and you are:

Tax Treatment

You will be obligated pursuant to the terms of the Notes — in the absence of a change in law, an administrative determination or a judicial ruling to the contrary — to characterize your Notes for all tax purposes as pre-paid derivative contracts in respect of the Underlyings. Except as otherwise stated below, the discussion herein assumes that the Notes will be so treated.

Upon the sale, exchange, redemption or maturity of your Notes, you should recognize capital gain or loss in an amount equal to the difference, if any, between the amount of cash you receive at such time and your tax basis in the Notes. Your tax basis in the Notes will generally be equal to the amount that you paid for the Notes. If you hold your Notes for more than one year, such gain or loss generally will be long-term capital gain or loss. If you hold your Notes for one year or less, such gain or loss generally will be short-term capital gain or loss. Short-term capital gains are generally subject to tax at the marginal tax rates applicable to ordinary income

We will not attempt to ascertain whether any issuer of a component stock included in an Underlying would be treated as a “passive foreign investment company” (“PFIC”), within the meaning of Section 1297 of the Code. If the issuer of one or more stocks included in an Underlying were so treated, certain adverse U.S. federal income tax consequences could possibly apply to a U.S. Holder of the Notes. You should refer to information filed with the SEC by the issuers of the component stocks included in an Underlying and consult your tax advisor regarding the possible consequences to you, if any, if any issuer of a component stock included in an Underlying is or becomes a PFIC.

No statutory, judicial or administrative authority directly discusses how your Notes should be treated for U.S. federal income tax purposes. As a result, the U.S. federal income tax consequences of your investment in the Notes are uncertain and alternative characterizations are possible. Accordingly, we urge you to consult your tax advisor in determining the tax consequences of an investment in your Notes in your particular circumstances, including the application of state, local or other tax laws and the possible effects of changes in federal or other tax laws.

Alternative Treatments

There is no judicial or administrative authority discussing how your Notes should be treated for U.S. federal income tax purposes. Therefore, the Internal Revenue Service (“IRS”) might assert that a treatment other than that described above is more appropriate. For example, the IRS could treat your Notes as a single debt instrument subject to special rules governing contingent payment debt instruments. Under those rules, the amount of interest you are required to take into account for each accrual period would be determined by constructing a projected payment schedule for the Notes and applying rules similar to those for accruing original issue discount on a hypothetical noncontingent debt instrument with that projected payment schedule. This method is applied by first determining the comparable yield – i.e., the yield at which we would issue a noncontingent fixed rate debt instrument with terms and conditions similar to your Notes – and then determining a payment schedule as of the issue date that would produce the comparable yield. These rules may have the effect of requiring you to include interest in income in respect of your Notes prior to your receipt of cash attributable to that income.

If the rules governing contingent payment debt instruments apply, any gain you recognize upon the sale, exchange, redemption or maturity of your Notes would be treated as ordinary interest income. Any loss you recognize at that time would be ordinary loss to the extent of interest you included as income in the current or previous taxable years in respect of your Notes, and, thereafter, capital loss.

If the rules governing contingent payment debt instruments apply, special rules would apply to a person who purchases Notes at a price other than the adjusted issue price as determined for tax purposes.

It is also possible that your Notes could be treated in the manner described above, except that any gain or loss that you recognize upon sale, exchange, redemption or maturity would be treated as ordinary income or loss. You should consult your tax advisor as to the tax consequences of such characterization and any possible alternative characterizations of your Notes for U.S. federal income tax purposes.

It is possible that the IRS could seek to characterize your Notes in a manner that results in tax consequences to you that are different from those described above.

You should consult your tax advisor as to possible alternative characterizations of your Notes for U.S. federal income tax purposes.

Possible Change in Law

On December 7, 2007, the IRS released a notice stating that the IRS and the Treasury Department are actively considering issuing guidance regarding the proper U.S. federal income tax treatment of an instrument such as the Notes, including whether holders should be required to accrue ordinary income on a current basis and whether gain or loss should be ordinary or capital. It is not possible to determine what guidance they will ultimately issue, if any. It is possible, however, that under such guidance, holders of the Notes will ultimately be required to accrue income currently and this could be applied on a retroactive basis. The IRS and the Treasury Department are also considering other relevant issues, including whether foreign holders of such instruments should be subject to withholding tax on any deemed income accruals and whether the special “constructive ownership rules” of Section 1260 of the Code might be applied to such instruments. Except to the extent otherwise provided by law, we intend to continue treating the Notes for U.S. federal

income tax purposes in accordance with the treatment described above under “Tax Treatment” unless and until such time as Congress, the Treasury Department or the IRS determine that some other treatment is more appropriate.

Furthermore, in 2007, legislation was introduced in Congress that, if enacted, would have required holders that acquired instruments such as your Notes after the bill was enacted to accrue interest income over the term of such instruments even though there will be no interest payments over the term of such instruments. It is not possible to predict whether a similar or identical bill will be enacted in the future, or whether any such bill would affect the tax treatment of your Notes.

It is impossible to predict what any such legislation or administrative or regulatory guidance might provide, and whether the effective date of any legislation or guidance will affect Notes that were issued before the date that such legislation or guidance is issued. You are urged to consult your tax advisor as to the possibility that any legislative or administrative action may adversely affect the tax treatment of your Notes.

Backup Withholding and Information Reporting

You will be subject to generally applicable information reporting and backup withholding requirements as discussed in the accompanying prospectus supplement under “United States Federal Taxation — U.S. Holders — Backup Withholding and Information Reporting” with respect to payments on your Notes and, notwithstanding that we do not intend to treat the Notes as debt for tax purposes, we intend to backup withhold on such payments with respect to your Notes unless you comply with the requirements necessary to avoid backup withholding on debt instruments (in which case you will not be subject to such backup withholding) as set forth under “United States Federal Taxation — U.S. Holders — Backup Withholding and Information Reporting” in the accompanying prospectus supplement. Please see the discussion under “United States Federal Taxation — U.S. Holders — Backup Withholding and Information Reporting” in the accompanying prospectus supplement for a description of the applicability of the backup withholding and information reporting rules to payments made on your Notes.

Non-U.S. Holders

This section applies to you only if you are a Non-U.S. Holder. You are a “Non-U.S. Holder” if you are the beneficial owner of Notes and are, for U.S. federal income tax purposes:

The term “Non-U.S. Holder” does not include any of the following holders:

Such holders should consult their tax advisors regarding the U.S. federal income tax consequences of an investment in the Notes.

We will not attempt to ascertain whether any issuer of a component stock included in an Underlying would be treated as a “United States real property holding corporation” (“USRPHC”), within the meaning of Section 897 of the Code. If the issuer of one or more stocks included in an Underlying was so treated, certain adverse U.S. federal income tax consequences could possibly apply to a Non-U.S. Holder of the Notes. You should refer to information filed with the SEC by the issuers of the component stocks included in an Underlying and consult your tax advisor regarding the possible consequences to you, if any, if any issuer of a component stock included in an Underlying is or becomes a USRPHC.

You will be subject to generally applicable information reporting and backup withholding requirements as discussed in the accompanying prospectus supplement under “United States Federal Taxation — Non-U.S. Holders — Backup Withholding and Information Reporting” with respect to payments on your Notes at maturity and, notwithstanding that we do not intend to treat the Notes as debt for tax purposes, we intend to backup withhold on such payments with respect to your Notes unless you comply with the requirements necessary to avoid backup withholding on debt instruments (in which case you will not be subject to such backup withholding) as set forth under “United States Federal Taxation — Non-U.S. Holders — Backup Withholding and Information Reporting” in the accompanying prospectus supplement.

As discussed above, alternative characterizations of the Notes for U.S. federal income tax purposes are possible. Should an alternative characterization of the Notes, by reason of a change or clarification of the law, by regulation or otherwise, cause payments at maturity with respect to the Notes to become subject to withholding tax, we will withhold tax at the applicable statutory rate and we will not make payments of any additional amounts. Prospective Non-U.S. Holders of the Notes should consult their tax advisors in this regard.

Furthermore, on December 7, 2007, the IRS released Notice 2008-2 soliciting comments from the public on various issues, including whether instruments such as your Notes should be subject to withholding. It is therefore possible that rules will be issued in the future, possibly with retroactive effect, that would cause payments on your Notes at maturity to be subject to withholding, even if you comply with certification requirements as to your foreign status.

In addition, the Treasury Department has issued regulations under which amounts paid or deemed paid on certain financial instruments (“871(m) financial instruments”) that are treated as attributable to U.S.-source dividends could be treated, in whole or in part depending on the circumstances, as a “dividend equivalent” payment that is subject to tax at a rate of 30% (or a lower rate under an applicable treaty), which in the case of any amounts you receive upon the sale, exchange, redemption or maturity of your Notes, could be collected via withholding. If these regulations were to apply to the Notes, we may be required to withhold such taxes if any U.S.-source dividends are paid on the stocks included in the Underlyings during the term of the Notes. We could also require you to make certifications (e.g., an applicable IRS Form W-8) prior to the maturity of the Notes in order to avoid or minimize withholding obligations, and we could withhold accordingly (subject to your potential right to claim a refund from the IRS) if such certifications were not received or were not satisfactory. If withholding was required, we would not be required to pay any additional amounts with respect to amounts so withheld. These regulations generally will apply to 871(m) financial instruments (or a combination of financial instruments treated as having been entered into in connection with each other) issued (or significantly modified and treated as retired and reissued) on or after January 1, 2027, but will also apply to certain 871(m) financial instruments (or a combination of financial instruments treated as having been entered into in connection with each other) that have a delta (as defined in the applicable Treasury regulations) of one and are issued (or significantly modified and treated as retired and reissued) on or after January 1, 2017. In addition, these regulations will not apply to financial instruments that reference a “qualified index” (as defined in the regulations). We have determined that, as of the issue date of your Notes, your Notes will not be subject to withholding under these rules. In certain limited circumstances, however, you should be aware that it is possible for Non-U.S. Holders to be liable for tax under these rules with respect to a combination of transactions treated as having been entered into in connection with each other even when no withholding is required. You should consult your tax advisor concerning these regulations, subsequent official guidance and regarding any other possible alternative characterizations of your Notes for U.S. federal income tax purposes.

Foreign Account Tax Compliance Act

Legislation commonly referred to as “FATCA” generally imposes a gross-basis withholding tax of 30% on payments to certain non-U.S. entities (including financial intermediaries) with respect to certain financial instruments, unless various U.S. information reporting and due diligence requirements have been satisfied. An intergovernmental agreement between the United States and the non-U.S. entity’s jurisdiction may modify or supplement these requirements. This legislation generally applies to certain financial instruments that are treated as paying U.S.-source interest or other U.S.-source “fixed or determinable annual or periodical” (“FDAP”) income. Current provisions of the Code and Treasury regulations that govern FATCA treat gross proceeds from a sale or other disposition of obligations that can produce U.S.-source interest or FDAP income as subject to FATCA withholding. However, under recently proposed Treasury regulations, such gross proceeds would not be subject to FATCA withholding. In its preamble to such proposed regulations, the Treasury Department and the IRS have stated that taxpayers may generally rely on the proposed Treasury regulations until final Treasury regulations are issued. We will not be required to pay any additional amounts with respect to amounts withheld. Both U.S. and Non-U.S. Holders should consult their tax advisors regarding the potential application of FATCA to the Notes.

SUPPLEMENTAL PLAN OF DISTRIBUTION

Jefferies LLC, the broker-dealer subsidiary of Jefferies Financial Group Inc., will act as our Agent in connection with the offering of the Notes. Subject to the terms and conditions contained in a distribution agreement between us and Jefferies LLC, the Agent has agreed to use its reasonable efforts to solicit purchases of the Notes. We have the right to accept offers to purchase Notes and may reject any proposed purchase of the Notes. We or Jefferies LLC will pay various discounts and commissions to dealers of up to $20.00 per Note depending on market conditions. The Agent may also reject any offer to purchase Notes. An affiliate of the Issuer will pay a structuring fee of up to $8.00 per Note in connection with the distribution of the Notes to other registered broker-dealers.

We may also sell Notes to the Agent who will purchase the Notes as principal for its own account. In that case, the Agent will purchase the Notes at a price equal to the issue price specified on the cover page of this pricing supplement, less a discount. The discount will equal the applicable commission on an agency sale of the Notes.

The Agent may resell any Notes it purchases as principal to other brokers or dealers at a discount, which may include all or part of the discount the Agent received from us. If all the Notes are not sold at the initial offering price, the Agent may change the offering price and the other selling terms.

The Agent will sell any unsold allotment pursuant to this pricing supplement from time to time in one or more transactions in the over-the-counter market, through negotiated transactions or otherwise at market prices prevailing at the time of time of sale, prices relating to the prevailing market prices or negotiated prices.

We may also sell Notes directly to investors. We will not pay commissions on Notes we sell directly.

The Agent, whether acting as agent or principal, may be deemed to be an “underwriter” within the meaning of the Securities Act. We have agreed to indemnify the Agent against certain liabilities, including liabilities under the Securities Act.

If the Agent sells Notes to dealers who resell to investors and the Agent pays the dealers all or part of the discount or commission it receives from us, those dealers may also be deemed to be “underwriters” within the meaning of the Securities Act.

The Agent is offering the Notes, subject to prior sale, when, as and if issued to and accepted by it, subject to approval of legal matters by its counsel, including the validity of the Notes, and other conditions contained in the distribution agreement, such as the receipt by the Agent of officers’ certificates and legal opinions. The Agent reserves the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

The Agent is a member of the Financial Industry Regulatory Authority, Inc. (“FINRA”). Accordingly, the offering of the notes will conform to the requirements of FINRA Rule 5121. See “Conflict of Interest” below.

The Agent is not acting as your fiduciary or advisor solely as a result of the offering of the Notes, and you should not rely upon any communication from the Agent in connection with the Notes as investment advice or a recommendation to purchase the Notes. You should make your own investment decision regarding the Notes after consulting with your legal, tax, and other advisors.

We expect to deliver the Notes against payment therefor in New York, New York on February 4, 2026, which will be the third scheduled business day following the initial pricing date. Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in one business day, unless the parties to any such trade expressly agree otherwise. Accordingly, if the initial settlement of the Notes occurs more than one business day from a pricing date, purchasers who wish to trade the Notes more than one business day prior to the Original Issue Date will be required to specify alternative settlement arrangements to prevent a failed settlement.

Jefferies LLC and any of our other broker-dealer subsidiaries may use this pricing supplement, the prospectus and the prospectus supplements for offers and sales in secondary market transactions and market-making transactions in the Notes. However, they are not obligated to engage in such secondary market transactions and/or market-making transactions. Our subsidiaries may act as principal or agent in these transactions, and any such sales will be made at prices related to prevailing market prices at the time of the sale.

Notice to Prospective Investors in the European Economic Area

This pricing supplement and the accompanying product supplement, prospectus and prospectus supplement is not a prospectus for the purposes of Regulation (EU) 2017/1129 (the “Prospectus Regulation”). This pricing supplement and the accompanying product supplement, prospectus and prospectus supplement have been prepared on the basis that any offer of Notes in any Member State of the European Economic Area (the “EEA”) will only be made to a legal entity which is a qualified investor under the Prospectus Regulation (“EEA Qualified Investors”). Accordingly any person making or

intending to make an offer in that Member State of Notes which are the subject of the offering contemplated in this pricing supplement and the accompanying product supplement, prospectus and prospectus supplement may only do so with respect to EEA Qualified Investors. Neither the Issuer nor the Agent have authorized, nor do they authorize, the making of any offer of Notes other than to EEA Qualified Investors.

PROHIBITION OF SALES TO EEA RETAIL INVESTORS — The Notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the EEA. For these purposes, (a) a retail investor means a person who is one (or more) of: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended, “MiFID II”); (ii) a customer within the meaning of Directive (EU) 2016/97 (as amended, the “Insurance Distribution Directive”), where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or (iii) not a qualified investor as defined in the Prospectus Regulation and (b) the expression “offer” includes the communication in any form and by any means of sufficient information on the terms of the offer and the Notes to be offered so as to enable an investor to decide to purchase or subscribe for the Notes. Consequently no key information document required by Regulation (EU) No 1286/2014 (as amended, the “PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail investors in the EEA has been prepared and therefore offering or selling the Notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation.

Notice to Prospective Investors in the United Kingdom

This pricing supplement and the accompanying product supplement, prospectus and prospectus supplement is not a prospectus for the purposes of Regulation (EU) 2017/1129 as it forms part of domestic law in the United Kingdom by virtue of the European Union (Withdrawal) Act 2018, as amended by the European Union (Withdrawal Agreement) Act 2020 (the “EUWA”) (the “UK Prospectus Regulation”). This pricing supplement and the accompanying product supplement, prospectus and prospectus supplement have been prepared on the basis that any offer of Notes in the United Kingdom will only be made to a legal entity which is a qualified investor under the UK Prospectus Regulation (“UK Qualified Investors”). Accordingly any person making or intending to make an offer in the United Kingdom of Notes which are the subject of the offering contemplated in this pricing supplement and the accompanying product supplement, prospectus and prospectus supplement may only do so with respect to UK Qualified Investors. Neither the Issuer nor the Agent have authorized, nor do they authorize, the making of any offer of Notes other than to UK Qualified Investors.

PROHIBITION OF SALES TO UK RETAIL INVESTORS — The Notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the United Kingdom. For these purposes, (a) a retail investor means a person who is one (or more) of: (i) a retail client, as defined in point (8) of Article 2 of Regulation (EU) No 2017/565 as it forms part of domestic law in the United Kingdom by virtue of the EUWA; or (ii) a customer within the meaning of the provisions of the United Kingdom’s Financial Services and Markets Act 2000, as amended (the “FSMA”) and any rules or regulations made under the FSMA to implement the Insurance Distribution Directive, where that customer would not qualify as a professional client, as defined in point (8) of Article 2(1) of Regulation (EU) No 600/2014 as it forms part of domestic law in the United Kingdom by virtue of the EUWA; or (iii) not a qualified investor as defined in Article 2 of Regulation (EU) 2017/1129 as it forms part of domestic law in the United Kingdom by virtue of the EUWA and (b) the expression “offer” includes the communication in any form and by any means of sufficient information on the terms of the offer and the Notes to be offered so as to enable an investor to decide to purchase or subscribe for the Notes. Consequently no key information document required by Regulation (EU) No 1286/2014 as it forms part of domestic law in the United Kingdom by virtue of the EUWA (the “UK PRIIPs Regulation”) for offering or selling the Notes or otherwise making them available to retail investors in the United Kingdom has been prepared and therefore offering or selling the Notes or otherwise making them available to any retail investor in the United Kingdom may be unlawful under the UK PRIIPs Regulation.

The communication of this pricing supplement and the accompanying product supplement, prospectus and prospectus supplement relating to the issue of the Notes offered hereby is not being made, and such documents and/or materials have not been approved, by an authorized person for the purposes of Section 21 of the FSMA. Accordingly, such documents and/or materials are not being distributed to, and must not be passed on to, the general public in the United Kingdom. The communication of such documents and/or materials as a financial promotion is only being made to those persons in the United Kingdom who have professional experience in matters relating to investments and who fall within the definition of investment professionals (as defined in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended (the “Financial Promotion Order”)) or who fall within Article 49(2)(a) to (d) of the Financial Promotion Order, or who are any other persons to whom it may otherwise lawfully be made under the Financial Promotion Order (all such persons together being referred to as “relevant persons”). In the United Kingdom the Notes offered hereby are only available to, and any investment or investment activity to which this pricing supplement and the accompanying product supplement, prospectus and prospectus supplement relates will be engaged in only with, relevant persons. Any person in the United Kingdom that is not a relevant person should not act or rely on this pricing supplement and the accompanying product supplement, prospectus and prospectus supplement or any of their contents.

Other Regulatory Restrictions in the United Kingdom

Any invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) in connection with the issue or sale of the Notes may only be communicated or caused to be communicated in circumstances in which Section 21(1) of the FSMA does not apply to the Issuer.

All applicable provisions of the FSMA must be complied with in respect to anything done by any person in relation to the Notes in, from or otherwise involving the United Kingdom.

Notice to Prospective Investors in China

This pricing supplement and the accompanying prospectus supplement and prospectus do not constitute a public offer of the Notes, whether by sale or subscription, in the People’s Republic of China (the “PRC”). The Notes are not being offered or sold directly or indirectly in the PRC to or for the benefit of, legal or natural persons of the PRC. Further, no legal or natural persons of the PRC may directly or indirectly purchase any of the Notes without obtaining all prior PRC’s governmental approvals that are required, whether statutorily or otherwise. Persons who come into possession of this document are required by the issuer and its representatives to observe these restrictions.

Notice to Prospective Investors in Hong Kong

None of the Notes (except for Notes which are a “structured product” as defined in the Securities and Futures Ordinance (Cap. 571 of the laws of Hong Kong)) (the “SFO”) have been offered or sold and will be offered or sold in Hong Kong, by means of any document, other than (i) to “professional investors” as defined in the SFO and any rules made under the SFO or (ii) in other circumstances which do not result in the document being a “prospectus” as defined in the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32 of the laws of Hong Kong) (the “C(WUMP)O”) or which do not constitute an offer to the public within the meaning of the C(WUMP)O. No person has issued or had in its possession for the purposes of issue, and will not issue or have in its possession for the purposes of issue, whether in Hong Kong or elsewhere, any advertisement, invitation or document relating to the Notes, which is directed at, or the contents of which are likely to be accessed or read by, the public of Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to the Notes which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the SFO and any rules made under the SFO.

Notice to Prospective Investors in Indonesia

This pricing supplement and the accompanying prospectus supplement and prospectus do not constitute an offer to sell nor a solicitation to buy securities in Indonesia.

Notice to Prospective Investors in Japan

The Notes have not been and will not be registered pursuant to Article 4, Paragraph 1 of the Financial Instruments and Exchange Law of Japan (Law no. 25 of 1948, as amended) (“FIEL”) and, accordingly, none of the Notes nor any interest therein may be offered or sold, directly or indirectly, in Japan or to, or for the benefit, of any Japanese person or to others for re-offering or resale, directly or indirectly, in Japan or to any Japanese person except under circumstances which will result in compliance with all applicable laws, regulations and guidelines promulgated by the relevant Japanese governmental and regulatory authorities and in effect at the relevant time. For this purpose, a “Japanese person” means any person resident in Japan, including any corporation or other entity organized under the laws of Japan.

Notice to Prospective Investors in Malaysia

No action has been, or will be, taken to comply with Malaysian laws for making available, offering for subscription or purchase, or issuing any invitation to subscribe for or purchase or sale of the Notes in Malaysia or to persons in Malaysia as the Notes are not intended by the issuer to be made available, or made the subject of any offer or invitation to subscribe or purchase, in Malaysia. Neither this document nor any document or other material in connection with the Notes should be distributed, caused to be distributed or circulated in Malaysia. No person should make available or make any invitation or offer or invitation to sell or purchase the Notes in Malaysia unless such person takes the necessary action to comply with Malaysian laws.

Notice to Prospective Investors in the Philippines

Any person claiming an exemption under Section 10.1 of the Securities Regulation Code (“SRC”) (or the exempt transactions) must provide to any party to whom it offers or sells securities in reliance on such exemption a written disclosure containing the following information: (1) The specific provision of Section 10.1 of the SRC on which the exemption from registration is claimed; and (2) The following statement must be made in bold face, prominent type: THE SECURITIES BEING OFFERED OR SOLD HEREIN HAVE NOT BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES REGULATION CODE OF THE PHILIPPINES. ANY FUTURE OFFER OR SALE THEREOF IS SUBJECT TO REGISTRATION REQUIREMENTS UNDER THE CODE UNLESS SUCH OFFER OR SALE QUALIFIES AS AN EXEMPT TRANSACTION.

Notice to Prospective Investors in Singapore

This pricing supplement and the accompanying prospectus supplement and prospectus has not been and will not be registered as a prospectus under the Securities and Futures Act 2001, as amended (the “SFA”) by the Monetary Authority of Singapore, and the offer of the Notes in Singapore is made primarily pursuant to the exemptions under Sections 274 and 275 of the SFA. Accordingly, none of this pricing supplement nor the accompanying prospectus supplement, prospectus or any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of any Notes may be circulated or distributed, nor may any Notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor as defined in Section 4A of the SFA (an “Institutional Investor”) pursuant to Section 274 of the SFA, (ii) to an accredited investor as defined in Section 4A of the SFA (an “Accredited Investor”) or other relevant person as defined in Section 275(2) of the SFA (a “Relevant Person”) and pursuant to Section 275(1) of the SFA, or to any person pursuant to an offer referred to in Section 275(1A) of the SFA, in accordance with the conditions specified in Section 275 of the SFA and (where applicable) Regulation 3 of the Securities and Futures (Classes of Investors) Regulations 2018, or (iii) otherwise pursuant to, and in accordance with, the conditions of any other applicable exemption or provision of the SFA.

It is a condition of the offer that where the Notes are subscribed for or acquired pursuant to an offer made in reliance on Section 275 of the SFA by a Relevant Person which is:

securities or securities-based derivatives contracts (each as defined in Section 2(1) of the SFA) of that corporation and the beneficiaries’ rights and interests (howsoever described) in that trust shall not be transferred within six months after that corporation or that trust has subscribed for or acquired the Notes except:

Notification under Section 309B(1) of the Securities and Futures Act 2001 of Singapore (“SFA”): For the purposes of the Issuer’s obligations pursuant to sections 309B(1)(a) and 309B(1)(c) of the SFA, the Issuer has determined, and hereby notifies all relevant persons (as defined in Section 309A(1) of the SFA), that the Notes are capital markets products other than prescribed capital markets products (as defined in the Securities and Futures (Capital Markets Products) Regulations 2018) and Specified Investment Products (as defined in Monetary Authority of Singapore (“MAS”) Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

Notice to Prospective Investors in South Korea

The Notes have not been registered with the Financial Services Commission of Korea for a public offering in Korea. The Notes have not been and will not be offered, sold or delivered directly or indirectly, or offered, sold or delivered to any person for re-offering or resale, directly or indirectly, in Korea or to any resident of Korea, except as otherwise permitted under applicable Korean laws and regulations, including the Financial Investment Services and Capital Markets Act and the Foreign Exchange Transaction Law and the decrees and regulations thereunder. By the purchase of the Notes, the relevant holder thereof will be deemed to represent and warrant that if it is in Korea or is a resident of Korea, it purchased the Notes pursuant to the applicable laws and regulations of Korea.

Notice to Prospective Investors in Taiwan

The Notes may be made available outside Taiwan for purchase outside Taiwan by Taiwan resident investors, but may not be offered or sold in Taiwan.

Notice to Prospective Investors in Thailand

The pricing supplement and the accompanying prospectus supplement and prospectus have not been approved by the Thailand Securities and Exchange Commission which takes no responsibility for its contents. Nothing in this pricing supplement and the accompanying prospectus supplement and prospectus nor any action of Jefferies Financial Group Inc. or any of its affiliates constitutes or shall be construed as an offer for sale of any securities, or a solicitation to make an offer for sale of any securities in Thailand or a provision of any securities business requiring license under the SEC Act. This pricing supplement and the accompanying prospectus supplement and prospectus is intended to be read by the addressee only and must not be passed to, issued to, or shown to the public generally.

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. Accordingly, the offering is subject to the provisions of FINRA Rule 5121 relating to conflicts of interests and will be conducted in accordance with the requirements of Rule 5121. Jefferies LLC will not confirm sales of the Notes to any account over which it exercises discretionary authority without the prior written specific approval of the customer.

LEGAL MATTERS

The validity of the Notes is being passed on for us by Sidley Austin LLP, New York, New York.

EXPERTS

The financial statements of Jefferies Financial Group Inc. as of November 30, 2024 and 2023, and for each of the three years in the period ended November 30, 2024, incorporated by reference in this prospectus supplement from Jefferies Financial Group Inc.’s Annual Report on Form 10-K, and the effectiveness of the Jefferies Financial Group Inc.’s internal control over financial reporting have been audited by Deloitte & Touche LLP, an independent registered public accounting firm, as stated in their reports. Such financial statements are incorporated by reference in reliance upon the reports of such firm given their authority as experts in accounting and auditing.

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Jefferies

Jefferies Financial Group Inc.

Senior Autocallable Barrier Notes due February 4, 2030

Linked to the Worst-Performing of the Dow Jones Industrial Average^®, the Nasdaq-100 Index^® and the Russell 2000^® Index

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PRICING SUPPLEMENT

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, 2026

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