Primary Offering Prospectus (Form 424B2)

Subject To Completion, dated April 22, 2026 PRICING SUPPLEMENT dated April , 2026 (To Product Supplement No. 2 dated June 30, 2023 Prospectus Supplement dated May 12, 2023 and Prospectus dated May 12, 2023)

	Jefferies Financial Group Inc. Medium-Term Notes, Series A Equity Index Linked Securities
	Market Linked Securities- Auto-Callable with Contingent Downside Principal at Risk Securities Linked to the Lowest Performing of the S&P 500® Index, the Russell 2000® Index and the Dow Jones Industrial Average® due May 3, 2030
■ Linked to the lowest performing of the S&P 500® Index, the Russell 2000® Index and the Dow Jones Industrial Average® (each referred to as an "Index") ■ Unlike ordinary debt securities, the securities do not pay interest, do not repay a fixed amount of principal at maturity and are subject to potential automatic call upon the terms described below. Whether the securities are automatically called for a fixed call premium or, if not automatically called, the maturity payment amount, will depend, in each case, on the closing level of the lowest performing Index on the applicable call date. The lowest performing Index on any call date is the Index that has the lowest closing level on that call date as a percentage of its starting level ■ Automatic Call. If the closing level of the lowest performing Index on any call date is greater than or equal to its starting level, the securities will be automatically called for the face amount plus the call premium applicable to that call date. The call premium applicable to each call date will be a percentage of the face amount that increases for each call date based on a simple (non-compounding) return of at least approximately 12.20% per annum (to be determined on the pricing date). Please see "Terms of the Securities - Call Dates and Call Premiums" below for the call dates and call premiums ■ Potential Loss of Principal. If the securities are not automatically called prior to or at stated maturity, you will receive the face amount at stated maturity if, and only if, the closing level of the lowest performing Index on the final calculation day is greater than or equal to its threshold level. If the closing level of the lowest performing Index on the final calculation day is less than its threshold level, you will lose more than 25%, and possibly all, of the face amount of your securities. ■ If the securities are not automatically called prior to or at stated maturity, you will have full downside exposure to the lowest performing Index from its starting level if its closing level on the final calculation day is less than its threshold level, but you will not participate in any appreciation of any Index and will not receive any dividends on securities included in any Index ■ Your return on the securities will depend solely on the performance of the Index that is the lowest performing Index on each call date. You will not benefit in any way from the performance of the better performing Indices. Therefore, you will be adversely affected if any Index performs poorly, even if the other Indices perform favorably ■ Any positive return on the securities will be limited to the applicable call premium, even if the closing level of the lowest performing Index on the applicable call date significantly exceeds its starting level. You will not participate in any appreciation of the lowest performing Index beyond the applicable fixed call premium ■ All payments on the securities are subject to our credit risk, and you will have no ability to pursue any securities included in any Index for payment; if we default on our obligations under the securities, you could lose some or all of your investment ■ No periodic interest payments or dividends ■ No exchange listing; designed to be held to maturity

	Original Offering Price	Agent Discount(1)(2)	Proceeds to the Issuer
Per Security	$1,000.00	$25.75	$974.25
Total

(1)	Jefferies LLC and Wells Fargo Securities, LLC are the agents for the distribution of the securities and are acting as principal. See "Terms of the Securities-Agents" and "Estimated Value of the Securities" in this pricing supplement for further information.

(2)

In respect of certain securities sold in this offering, Jefferies LLC, the broker-dealer subsidiary of Jefferies Financial Group Inc., may pay a fee of up to $2.00 per security to selected securities dealers in consideration for marketing and other services in connection with the distribution of the securities to other securities dealers.

Terms of the Securities

	Issuer:		Jefferies Financial Group Inc.
	Market Measures:		The S&P 500® Index, the Russell 2000® Index and the Dow Jones Industrial Average® (each referred to as an "Index," and collectively as the "Indices").
	Pricing Date*:		April 30, 2026
	Issue Date*:		May 5, 2026
	Original Offering Price:		$1,000 per security.
	Face Amount:		$1,000 per security. References in this pricing supplement to a "security" are to a security with a face amount of $1,000.
	Automatic Call:		If the closing level of the lowest performing Index on any call date is greater than or equal to its starting level, the securities will be automatically called, and on the related call settlement date you will be entitled to receive a cash payment per security in U.S. dollars equal to the face amount per security plus the call premium applicable to the relevant call date. The last call date is the final calculation day, and payment upon an automatic call on the final calculation day, if applicable, will be made on the stated maturity date. Any positive return on the securities will be limited to the applicable call premium, even if the closing level of the lowest performing Index on the applicable call date significantly exceeds its starting level. You will not participate in any appreciation of the lowest performing Index beyond the applicable call premium. If the securities are automatically called, they will cease to be outstanding on the related call settlement date and you will have no further rights under the securities after such call settlement date. You will not receive any notice from us if the securities are automatically called.

			Postponement Provisions".
	Call Settlement Date:		Three business days after the applicable call date (as each such call date may be postponed as described below in "-Market Disruption Events and Postponement Provisions", if applicable); provided that the call settlement date for the last call date is the stated maturity date.
	Maturity Payment Amount:		If the securities are not automatically called, then on the stated maturity date, you will be entitled to receive a cash payment per security in U.S. dollars equal to the maturity payment amount. The "maturity payment amount" per security will equal: • if the ending level of the lowest performing Index on the final calculation day is less than its starting level but greater than or equal to its threshold level: $1,000; or • if the ending level of the lowest performing Index on the final calculation day is less than its threshold level: $1,000 × performance factor of the lowest performing Index on the final calculation day
			If the securities are not automatically called and the ending level of the lowest performing Index on the final calculation day is less than its threshold level, you will lose more than 25%, and possibly all, of the face amount of your securities at stated maturity.
	Stated Maturity Date*:		May 3, 2030, subject to postponement. The securities are not subject to repayment at the option of any holder of the securities prior to the stated maturity date.
	Lowest Performing Index:		For any call date, the "lowest performing Index" will be the Index with the lowest performance factor on that call date.
	Performance Factor:		With respect to an Index on any call date, its closing level on such call date divided by its starting level (expressed as a percentage).
	Closing Level:		With respect to each Index, closing level has the meaning set forth under "General Terms of the Securities-Certain Terms for Securities Linked to an Index-Certain Definitions" in the accompanying product supplement.
	Starting Level:		With respect to the S&P 500® Index: , its closing level on the pricing date. With respect to the Russell 2000® Index: , its closing level on the pricing date. With respect to the Dow Jones Industrial Average®: , its closing level on the pricing date.
	Ending Level:		The "ending level" of an Index will be its closing level on the final calculation day.
	Threshold Level:		With respect to the S&P 500® Index: , which is equal to 75% of its starting level. With respect to the Russell 2000® Index: , which is equal to 75% of its starting level. With respect to the Dow Jones Industrial Average®: , which is equal to 75% of its starting level.
	Market Disruption Events and Postponement Provisions:		Each call date (including the final calculation day) is subject to postponement due to non-trading days and the occurrence of a market disruption event. In addition, the stated maturity date will be postponed if the final calculation day is postponed, and will be adjusted for non-business days. For more information regarding adjustments to the call dates and the stated maturity date, see "General Terms of the Securities-Consequences of a Market Disruption Event; Postponement of a Calculation Day-Securities Linked to Multiple Market Measures" and "-Payment Dates" in the accompanying product supplement. For purposes of the accompanying product supplement, each call date (including the final calculation day) is a "calculation day" and each call settlement date (including the stated maturity date) is a "payment date." In addition, for information regarding the circumstances that may result in a market disruption event, see "General Terms of the Securities-Certain Terms for Securities Linked to an Index-Market Disruption Events" in the accompanying product supplement.
	Calculation Agent:		Jefferies Financial Services Inc. ("JFSI"), a wholly owned subsidiary of Jefferies Financial Group Inc.
	Material Tax Consequences:		For a discussion of the material U.S. federal income and certain estate tax consequences of the ownership and disposition of the securities, see "Supplemental Discussion of U.S. Federal Income Tax Consequences."

	Agents:		Jefferies LLC and Wells Fargo Securities, LLC ("WFS") are the agents for the distribution of the securities. The agents will receive an agent discount of up to $25.75 per security. The agents may resell the securities to other securities dealers at the original offering price of the securities less a concession not in excess of $20.00 per security. Such securities dealers may include Wells Fargo Advisors ("WFA") (the trade name of the retail brokerage business of WFS's affiliates, Wells Fargo Clearing Services, LLC and Wells Fargo Advisors Financial Network, LLC). In addition to the concession allowed to WFA, WFS may pay $0.75 per security of the underwriting discount to WFA as a distribution expense fee for each security sold by WFA. In addition, in respect of certain securities sold in this offering, Jefferies LLC may pay a fee of up to $2.00 per security to selected securities dealers in consideration for marketing and other services in connection with the distribution of the securities to other securities dealers. The agents and/or one or more of their respective affiliates expects to realize hedging profits projected by their proprietary pricing models to the extent they assume the risks inherent in hedging our obligations under the securities. If the agents or any other dealer participating in the distribution of the securities or any of their affiliates conduct hedging activities for us in connection with the securities, that dealer or its affiliates will expect to realize a profit projected by its proprietary pricing models from those hedging activities. Any such projected profit will be in addition to any discount, concession or fee received in connection with the sale of the securities to you.
	Denominations:		$1,000 and any integral multiple of $1,000.
	CUSIP:		47233Y2M6

*	To the extent that we make any change to the expected pricing date or expected issue date, the call dates and stated maturity date may also be changed in our discretion to ensure that the term of the securities remains the same.

Additional Information about the Issuer and the Securities

•	Product Supplement No. 2 dated June 30, 2023:

•	Prospectus Supplement dated May 12, 2023 and Prospectus dated May 12, 2023:

Estimated Value of the Securities

Investor Considerations

■	believe that the closing level of the lowest performing Index will be greater than or equal to its starting level on one of the call dates;

■	seek the potential for a fixed return if the lowest performing Index has appreciated at all as of any of the call dates in lieu of full participation in any potential appreciation of any Index;

■	are willing to accept the risk that, if the closing level of the lowest performing Index is less than its starting level on each call date, they will not receive any positive return on their investment in the securities;

■

understand that if the securities are not automatically called and the ending level of the lowest performing Index on the final calculation day has declined by more than 25% from its starting level, they will be fully exposed to the decline in the lowest performing Index from its starting level and will lose more than 25%, and possibly all, of the face amount at stated maturity;

■	understand that the term of the securities may be as short as approximately one year and that they will not receive a higher call premium payable with respect to a later call date if the securities are called on an earlier call date;

■	are willing to forgo interest payments on the securities and dividends on the securities included in the Indices;

■	are willing to hold the securities until maturity.

■	understand that the return on the securities will depend solely on the performance of the Index that is the lowest performing Index on each call date and that they will not benefit in any way from the performance of the better performing Indices;

■	understand that the securities are riskier than alternative investments linked to only one of the Indices or linked to a basket composed of each Index; and

■	understand and are willing to accept the full downside risks of each Index.

■	seek a liquid investment or are unable or unwilling to hold the securities to maturity or any earlier automatic call;

■	believe that the closing level of the lowest performing Index will be less than its starting level on each call date;

■	seek a security with a fixed term;

■	are unwilling to accept the risk that, if the closing level of the Index is less than the starting level on each call date, they will not receive any positive return on their investment in the securities;

■	require full payment of the face amount of the securities at stated maturity;

■	are unwilling to purchase securities with an estimated value as of the pricing date that is lower than the original offering price and that may be as low as the lower estimated value set forth on the cover page;

■	are unwilling to accept the risk that the closing level of the lowest performing Index on the final calculation day may decline by more than 25% from its starting level;

■	seek the certainty of current income over the term of the securities;

■	seek exposure to the upside performance of any or each Index beyond the applicable call premiums;

■	seek exposure to a basket composed of each Index or a similar investment in which the overall return is based on a blend of the performances of the Indices, rather than solely on the lowest performing Index;

■	are unwilling to accept the risk of exposure to the Indices;

■	are unwilling to accept our credit risk; or

■	prefer the lower risk of fixed income investments with comparable maturities issued by companies with comparable credit ratings.

Determining Timing and Amount of Payment on the Securities

Selected Risk Considerations

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Investing In The Securities Is Not The Same As Investing In The Indices. Investing in the securities is not equivalent to investing in the Indices. As an investor in the securities, your return will not reflect the return you would realize if you actually owned and held the securities included in the Indices for a period similar to the term of the securities because you will not receive any dividend payments, distributions or any other payments paid on those securities. As a holder of the securities, you will not have any voting rights or any other rights that holders of the securities included in the Indices would have.

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Historical Levels Of An Index Should Not Be Taken As An Indication Of The Future Performance Of Such Index During The Term Of The Securities.

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Changes That Affect An Index May Adversely Affect The Value Of The Securities And Any Payments On The Securities.

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We Cannot Control Actions By Any Of The Unaffiliated Companies Whose Securities Are Included In An Index.

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We And Our Subsidiaries Have No Affiliation With Any Index Sponsor And Have Not Independently Verified Their Public Disclosure Of Information.

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The calculation agent is our subsidiary and may be required to make discretionary judgments that affect the return you receive on the securities. JFSI, a wholly owned subsidiary of Jefferies Financial Group Inc., will be the calculation agent for the securities. As calculation agent, JFSI will determine any values of the Indices and make any other determinations necessary to calculate any payments on the securities. In making these determinations, JFSI may be required to make discretionary judgments that may adversely affect any payments on the securities. See the sections entitled "General Terms of the Securities- Certain Terms for Securities Linked to an Index-Market Disruption Events,"-Adjustments to an Index" and "-Discontinuance of an Index" in the accompanying product supplement. In making these discretionary judgments, the fact that JFSI is our subsidiary may cause it to have economic interests that are adverse to your interests as an investor in the securities, and JFSI's determinations as calculation agent may adversely affect your return on the securities.

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Research reports by our subsidiaries or any participating dealer or its affiliates may be inconsistent with an investment in the securities and may adversely affect the level of An Index.

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Business activities of our subsidiaries or any participating dealer or its affiliates with the companies whose securities are included in An Index may adversely affect the level of such Index.

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Hedging activities by our subsidiaries or any participating dealer or its affiliates may adversely affect the level of An Index.

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Trading activities by our subsidiaries or any participating dealer or its affiliates may adversely affect the level of An Index.

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A participating dealer or its affiliates may realize hedging profits projected by its proprietary pricing models in addition to any selling concession and/or distribution expense fee, creating a further incentive for the participating dealer to sell the securities to you.

Hypothetical Examples and Returns

	Hypothetical Call Premiums:		12.20% for the first call date, 15.25% for the second call date, 18.30% for the third call date, 21.35% for the fourth call date, 24.40% for the fifth call date, 27.45% for the sixth call date, 30.50% for the seventh call date, 33.55% for the eighth call date, 36.60% for the ninth call date, 39.65% for the tenth call date, 42.70% for the eleventh call date, 45.75% for the twelfth call date and 48.80% for the thirteenth call date (assuming that a call premium is equal to the lowest possible call premium that will be determined on the pricing date)
	Hypothetical Starting Level for each Index:		100.00
	Hypothetical Threshold Level for each Index:		75.00 (75% of the hypothetical starting level)

Hypothetical call date on which securities are automatically called	Hypothetical payment per security on related call settlement date	Hypothetical pre-tax total rate of return(2)
1st call date	$1,122.00	12.20%
2nd call date	$1,152.50	15.25%
3rd call date	$1,183.00	18.30%
4th call date	$1,213.50	21.35%
5th call date	$1,244.00	24.40%
6th call date	$1,274.50	27.45%
7th call date	$1,305.00	30.50%
8th call date	$1,335.50	33.55%
9th call date	$1,366.00	36.60%
10th call date	$1,396.50	39.65%
11th call date	$1,427.00	42.70%
12th call date	$1,457.50	45.75%
13th call date	$1,488.00	48.80%

	Hypothetical performance factor of lowest performing Index on final calculation day	Hypothetical Maturity Payment Amount per Security
	95.00%	$1,000.00
	90.00%	$1,000.00
	80.00%	$1,000.00
	75.00%	$1,000.00
	74.00%	$740.00
	60.00%	$600.00
	50.00%	$500.00
	40.00%	$400.00
	30.00%	$300.00
	25.00%	$250.00
	0.00%	$0.00

		S&P 500® Index	Russell 2000® Index	Dow Jones Industrial Average®
	Hypothetical starting level:	100.00	100.00	100.00
	Hypothetical closing level on first call date:	150.00	135.00	120.00
	Performance factor (closing level on first call date divided by starting level):	150.00%	135.00%	120.00%

		S&P 500® Index	Russell 2000® Index	Dow Jones Industrial Average®
	Hypothetical starting level:	100.00	100.00	100.00
	Hypothetical closing level on call dates prior to the final calculation day:	Various (all below starting level)	Various (all below starting level)	Various (all below starting level)
	Hypothetical closing level on final calculation day:	150.00	135.00	120.00
	Performance factor (closing level on final calculation day divided by starting level):	150.00%	135.00%	120.00%

		S&P 500® Index	Russell 2000® Index	Dow Jones Industrial Average®
	Hypothetical starting level:	100.00	100.00	100.00
	Hypothetical closing level on call dates prior to the final calculation day:	Various (all below starting level)	Various (all below starting level)	Various (all below starting level)
	Hypothetical ending level:	80.00	115.00	110.00
	Hypothetical threshold level:	75.00	75.00	75.00
	Performance factor (ending level divided by starting level):	80.00%	115.00%	110.00%

		S&P 500® Index	Russell 2000® Index	Dow Jones Industrial Average®
	Hypothetical starting level:	100.00	100.00	100.00
	Hypothetical closing level on call dates prior to the final calculation day:	Various (all below starting level)	Various (all below starting level)	Various (all below starting level)
	Hypothetical ending level:	120.00	45.00	90.00
	Hypothetical threshold level:	75.00	75.00	75.00
	Performance factor (ending level divided by starting level):	120.00%	45.00%	90.00%

The Indices

The S&P 500® Index

The Russell 2000® Index

The Dow Jones Industrial Average®

SUPPLEMENTAL DISCUSSION OF U.S. FEDERAL INCOME TAX CONSEQUENCES

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a dealer in securities or currencies;

■

a U.S. Holder (as defined below) whose functional currency for tax purposes is not the U.S. dollar.

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

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a citizen or resident of the United States;

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a domestic corporation;

■

an estate whose income is subject to U.S. federal income tax regardless of its source; or

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a trust if a United States court can exercise primary supervision over the trust's administration and one or more United States persons are authorized to control all substantial decisions of the trust.

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a nonresident alien individual;

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a foreign corporation; or

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an estate or trust that in either case is not subject to U.S. federal income tax on a net income basis on income or gain from the securities.

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a holder who is an individual present in the United States for 183 days or more in the taxable year of disposition and who is not otherwise a resident of the United States for U.S. federal income tax purposes;

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certain former citizens or residents of the United States; or

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a holder for whom income or gain in respect of the securities is effectively connected with the conduct of a trade or business in the United States.

LEGAL MATTERS

PRS-30