424B2 1 dp237154_424b2-us2528741d.htm PRELIMINARY PRICING SUPPLEMENT

The information in this preliminary pricing supplement is not complete and may be changed. A registration statement relating to these securities has been filed with the Securities and Exchange Commission. This preliminary pricing supplement and the accompanying product supplement, underlying supplement, prospectus supplement and prospectus are not an offer to sell these securities, nor are they soliciting an offer to buy these securities, in any state where the offer or sale is not permitted. SUBJECT TO COMPLETION, DATED NOVEMBER 10, 2025
Citigroup Global Markets Holdings Inc. | November , 2025 Medium-Term Senior Notes, Series N Pricing Supplement No. 2025-USNCH29347 Filed Pursuant to Rule 424(b)(2) Registration Statement Nos. 333-270327 and 333-270327-01

Autocallable Securities Linked to an Unequally Weighted Basket of Six Underlyings Due November 30, 2028

| ▪ | The securities offered by this pricing supplement are unsecured debt securities issued by Citigroup Global Markets Holdings Inc. and guaranteed by Citigroup Inc. Unlike conventional debt securities, the securities do not pay interest, do not guarantee the repayment of principal at maturity and are subject to potential automatic early redemption on a periodic basis on the terms described below. Your return on the securities will depend on the performance of an unequally weighted basket composed of the underlyings specified below.

| ▪ | The securities offer the potential for automatic early redemption at a premium following the first valuation date (other than the final valuation date) on which the basket value is greater than or equal to the initial basket value. If the securities are not automatically redeemed prior to maturity, the payment at maturity will depend on the final basket value. In this circumstance, you will be repaid the stated principal amount of your securities at maturity and receive a premium so long as the final basket value is greater than or equal to the initial basket value. However, if the securities are not automatically redeemed prior to maturity and the final basket value is less than the initial basket value, you will lose 1% of the stated principal amount of your securities for every 1% by which the final basket value is less than the initial basket value. You may lose a significant portion, and up to all, of your investment. Investors in the securities must be willing to forgo any dividends with respect to the underlyings. In addition, investors in the securities must be willing to accept full downside exposure to any depreciation of the basket.

| ▪ | Investors in the securities must be willing to accept (i) an investment that may have limited or no liquidity and (ii) the risk of not receiving any payments due under the securities if we and Citigroup Inc. default on our obligations. All payments on the securities are subject to the credit risk of Citigroup Global Markets Holdings Inc. and Citigroup Inc.

KEY TERMS
Issuer: | Citigroup Global Markets Holdings Inc., a wholly owned subsidiary of Citigroup Inc.
Guarantee: | All payments due on the securities are fully and unconditionally guaranteed by Citigroup Inc.

Basket: | Underlying | Weighting | Initial underlying value*
| EURO STOXX 50® Index | 40.00% |
| FTSE® 100 Index | 20.00% |
| Nikkei 225 Index | 20.00% |
| S&P / ASX 200 Index | 7.50% |
| Swiss Market Index | 7.50% |
| iShares® China Large-Cap ETF | 5.00% | $

Stated principal amount: | $1,000 per security
Pricing date: | November 25, 2025
Issue date: | December 3, 2025
Maturity date: | Unless earlier redeemed, November 30, 2028
Automatic early redemption: | If, on any valuation date prior to the final valuation date, the basket value is greater than or equal to the initial basket value, the securities will be automatically redeemed on the third business day immediately following that valuation date for an amount in cash per security equal to $1,000 plus the premium applicable to that valuation date. If the securities are automatically redeemed following any valuation date prior to the final valuation date, they will cease to be outstanding and you will not receive the premium applicable to any later valuation date.
Payment at maturity: | If the securities are not automatically redeemed prior to maturity, you will receive at maturity, for each security you then hold, an amount in cash equal to: § If the final basket value is greater than or equal to the initial basket value: $1,000 + the premium applicable to the final valuation date § If the final basket value is less than the initial basket value: $1,000 + ($1,000 × the basket return) If the securities are not automatically redeemed prior to maturity and the final basket value is less than the initial basket value, your payment at maturity will be less, and possibly significantly less, than the stated principal amount of your securities. You should not invest in the securities unless you are willing and able to bear the risk of losing a significant portion, and up to all, of your investment.
Listing: | The securities will not be listed on any securities exchange
Underwriter: | Citigroup Global Markets Inc. (“CGMI”), an affiliate of the issuer, acting as principal

Underwriting fee and issue price: | Issue price(1) | Underwriting fee(2) | Proceeds to issuer(3)
Per security: | $1,000.00 | $22.50 | $977.50
Total: | $ | $ | $
(Key Terms continued on next page)

(1) Citigroup Global Markets Holdings Inc. currently expects that the estimated value of the securities on the pricing date will be at least $908.00 per security, which will be less than the issue price. The estimated value of the securities is based on CGMI’s proprietary pricing models and our internal funding rate. It is not an indication of actual profit to CGMI or other of our affiliates, nor is it an indication of the price, if any, at which CGMI or any other person may be willing to buy the securities from you at any time after issuance. See “Valuation of the Securities” in this pricing supplement.

(2) CGMI will receive an underwriting fee of up to $22.50 for each security sold in this offering. The total underwriting fee and proceeds to issuer in the table above give effect to the actual total underwriting fee. For more information on the distribution of the securities, see “Supplemental Plan of Distribution” in this pricing supplement. In addition to the underwriting fee, CGMI and its affiliates may profit from expected hedging activity related to this offering, even if the value of the securities declines. See “Use of Proceeds and Hedging” in the accompanying prospectus.

(3) The per security proceeds to issuer indicated above represent the minimum per security proceeds to issuer for any security, assuming the maximum per security underwriting fee. As noted above, the underwriting fee is variable.

Investing in the securities involves risks not associated with an investment in conventional debt securities. See “Summary Risk Factors” beginning on page PS-7.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities or determined that this pricing supplement and the accompanying product supplement, underlying supplement, prospectus supplement and prospectus are truthful or complete. Any representation to the contrary is a criminal offense.

You should read this pricing supplement together with the accompanying product supplement, underlying supplement, prospectus supplement and prospectus, which can be accessed via the hyperlinks below:

Product Supplement No. EA-02-10 dated March 7, 2023 Underlying Supplement No. 11 dated March 7, 2023

Prospectus Supplement and Prospectus each dated March 7, 2023

The securities are not bank deposits and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency, nor are they obligations of, or guaranteed by, a bank.

Citigroup Global Markets Holdings Inc.

KEY TERMS (continued)
Valuation dates and premiums: | The premium applicable to each valuation date will be determined on the pricing date and will be at least the percentage of the stated principal amount set forth below. The premium may be significantly less than the appreciation of the basket from the trade date to the applicable valuation date.

| Valuation date* | Premium
| · | December 4, 2026 | 10.00% of the stated principal amount
| · | November 26, 2027 | 20.00% of the stated principal amount
| · | November 27, 2028 (the “final valuation date”) | 30.00% of the stated principal amount

| *Each valuation date is subject to postponement if such date is not a scheduled trading day or certain market disruption events occur
Basket value: | On any valuation date, 100 × (1 + the sum of the weighted underlying returns of the underlyings determined as of that date)
Basket return: | (i) The final basket value minus the initial basket value, divided by (ii) the initial basket value
Underlying return: | For each underlying on any valuation date, (i) its closing value on that valuation date minus its initial underlying value, divided by (ii) its initial underlying value
Initial basket value: | 100
Final basket value: | The basket value on the final valuation date
Weighted underlying return: | For each underlying on any valuation date, its underlying return on that valuation date multiplied by its weighting
CUSIP / ISIN: | 17331BG94 / US17331BG948

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Citigroup Global Markets Holdings Inc.

Additional Information

General. The terms of the securities are set forth in the accompanying product supplement, prospectus supplement and prospectus, as supplemented by this pricing supplement. The accompanying product supplement, prospectus supplement and prospectus contain important disclosures that are not repeated in this pricing supplement. For example, the accompanying product supplement contains important information about how the closing value of each underlying will be determined and about adjustments that may be made to the terms of the securities upon the occurrence of market disruption events and other specified events with respect to each underlying. The accompanying underlying supplement contains information about the EURO STOXX 50® Index, the FTSE® 100 Index, the Nikkei 225 Index, the S&P/ASX 200 Index and the Swiss Market Index® that is not repeated in this pricing supplement. It is important that you read the accompanying product supplement, underlying supplement, prospectus supplement and prospectus together with this pricing supplement in deciding whether to invest in the securities. Certain terms used but not defined in this pricing supplement are defined in the accompanying product supplement.

Closing Value. The “closing value” of an underlying on any date is (i) in the case of an underlying that is an underlying index, its closing level on such date and (ii) in the case of an underlying that is an underlying ETF, the closing price of its underlying shares on such date, as provided in the accompanying product supplement. The “underlying shares” of an underlying ETF are its shares that are traded on a U.S. national securities exchange. Please see the accompanying product supplement for more information.

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Citigroup Global Markets Holdings Inc.

Payout Table and Diagram

The table below illustrates how the amount payable per security will be calculated if the basket value on any valuation date is greater than or equal to the initial basket value. The table and diagram below assume that the premium applicable to each valuation date will be set at the minimum value indicated under “Key Terms” above. The actual premium applicable to each valuation date will be determined on the pricing date.

If the first valuation date on which the basket value is greater than or equal to the initial basket value is . . . | . . . then you will receive the following payment per $1,000 security upon automatic early redemption or at maturity, as applicable:
1st valuation date | $1,000 + applicable premium = $1,000 + $100.00 = $1,100.00
2nd valuation date | $1,000 + applicable premium = $1,000 + $200.00 = $1,200.00
Final valuation date | $1,000 + applicable premium = $1,000 + $300.00 = $1,300.00

If, on any valuation date, the basket value is less than the initial basket value, you will not receive the premium indicated above following that valuation date. In order to receive the premium indicated above, the basket value on the applicable valuation date must be greater than or equal to the initial basket value.

The diagram below illustrates the payment at maturity of the securities, assuming the securities have not previously been automatically redeemed, for a range of hypothetical basket returns.

Investors in the securities will not receive any dividends with respect to the underlyings. The diagram and examples below do not show any effect of lost dividend yield over the term of the securities. See “Summary Risk Factors—You will not receive dividends or have any other rights with respect to the underlyings” below.

Payment at Maturity Diagram
n The Securities n The Basket

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Hypothetical Examples of the Payment at Maturity

The examples below illustrate how to determine the payment at maturity on the securities, assuming the various hypothetical final basket values indicated below and assuming the securities are not automatically redeemed prior to maturity. The examples are solely for illustrative purposes, do not show all possible outcomes and are not a prediction of what the actual payment at maturity on the securities will be. The actual payment at maturity will depend on the actual final basket value.

The examples below are based on the following hypothetical values and do not reflect the actual initial underlying values of the underlyings. For the actual initial underlying value of each underlying, see the cover page of this pricing supplement. We have used these hypothetical values, rather than the actual values, to simplify the calculations and aid understanding of how the securities work. However, you should understand that the actual payment at maturity on the securities will be calculated based on the actual initial underlying value of each underlying, and not these hypothetical values. For ease of analysis, figures below may have been rounded. The examples below assume that the premium applicable to the final valuation date will be set at the minimum value indicated under “Key Terms” above. The actual premium applicable to the final valuation date will be determined on the pricing date.

Underlying | Hypothetical initial underlying value
EURO STOXX 50® Index | 100.00
FTSE® 100 Index | 100.00
Nikkei 225 Index | 100.00
S&P / ASX 200 Index | 100.00
Swiss Market Index | 100.00
iShares® China Large-Cap ETF | $100.00

Example 1—Upside Scenario A: The final basket value is 110.00, resulting in a 10.00% basket return. In this example, the final basket value is greater than the initial basket value.

Underlying | Hypothetical Closing Value on Final Valuation Date | Hypothetical Underlying Return on Final Valuation Date | Weighting | Hypothetical Weighted Underlying Return on Final Valuation Date
EURO STOXX 50® Index | 120.00 | 20.00% | 40.00% | 8.00%
FTSE® 100 Index | 60.00 | -40.00% | 20.00% | -8.00%
Nikkei 225 Index | 125.00 | 25.00% | 20.00% | 5.00%
S&P / ASX 200 Index | 108.00 | 8.00% | 7.50% | 0.60%
Swiss Market Index | 132.00 | 32.00% | 7.50% | 2.40%
iShares® China Large-Cap ETF | $140.00 | 40.00% | 5.00% | 2.00%
Sum of the hypothetical weighted underlying returns: | 10.00%
Hypothetical final basket value: | 100 × (1 + the sum of the hypothetical weighted underlying returns on final valuation date) = 100 × (1 + 10.00%) = 110.00

Payment at maturity per security = $1,000 + the premium applicable to the final valuation date

= $1,000 + $300.00

= $1,300.00

In this scenario, because the basket has appreciated from the initial basket value to the final basket value, you would be repaid the stated principal amount of your securities at maturity plus the premium applicable to the final valuation date.

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Citigroup Global Markets Holdings Inc.

Example 2—Upside Scenario B: The final basket value is 145.00, resulting in a 45.00% basket return. In this example, the final basket value is greater than the initial basket value.

Underlying | Hypothetical Closing Value on Final Valuation Date | Hypothetical Underlying Return on Final Valuation Date | Weighting | Hypothetical Weighted Underlying Return on Final Valuation Date
EURO STOXX 50® Index | 160.00 | 60.00% | 40.00% | 24.00%
FTSE® 100 Index | 180.00 | 80.00% | 20.00% | 16.00%
Nikkei 225 Index | 75.00 | -25.00% | 20.00% | -5.00%
S&P / ASX 200 Index | 128.00 | 28.00% | 7.50% | 2.10%
Swiss Market Index | 172.00 | 72.00% | 7.50% | 5.40%
iShares® China Large-Cap ETF | $150.00 | 50.00% | 5.00% | 2.50%
Sum of the hypothetical weighted underlying returns: | 45.00%
Hypothetical final basket value: | 100 × (1 + the sum of the hypothetical weighted underlying returns on final valuation date) = 100 × (1 + 45.00%) = 145.00

Payment at maturity per security = $1,000 + the premium applicable to the final valuation date

= $1,000 + $300.00

= $1,300.00

In this scenario, because the basket has appreciated from the initial basket value to the final basket value, you would be repaid the stated principal amount of your securities at maturity plus the premium applicable to the final valuation date. In this scenario, the premium applicable to the final valuation date is less than the basket return and, as a result, an investment in the securities would underperform a hypothetical alternative investment providing 1-to-1 exposure to the appreciation of the basket.

Example 3—Downside Scenario: The final basket value is 50.00, resulting in a -50.00% basket return. In this example, the final basket value is less than the initial basket value.

Underlying | Hypothetical Closing Value on Final Valuation Date | Hypothetical Underlying Return on Final Valuation Date | Weighting | Hypothetical Weighted Underlying Return on Final Valuation Date
EURO STOXX 50® Index | 30.00 | -70.00% | 40.00% | -28.00%
FTSE® 100 Index | 115.00 | 15.00% | 20.00% | 3.00%
Nikkei 225 Index | 40.00 | -60.00% | 20.00% | -12.00%
S&P / ASX 200 Index | 56.00 | -44.00% | 7.50% | -3.30%
Swiss Market Index | 24.00 | -76.00% | 7.50% | -5.70%
iShares® China Large-Cap ETF | $20.00 | -80.00% | 5.00% | -4.00%
Sum of the hypothetical weighted underlying returns: | -50.00%
Hypothetical final basket value: | 100 × (1 + the sum of the hypothetical weighted underlying returns on final valuation date) = 100 × (1 + -50.00%) = 50.00

Payment at maturity per security = $1,000 + ($1,000 × the basket return)

= $1,000 + ($1,000 × -50.00%)

= $1,000 + -$500.00

= $500.00

In this scenario, the basket has depreciated from the initial basket value to the final basket value and the final basket value is less than the initial basket value. As a result, your total return at maturity in this scenario would be negative and would reflect 1-to-1 exposure to the negative performance of the basket.

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Citigroup Global Markets Holdings Inc.

Summary Risk Factors

An investment in the securities is significantly riskier than an investment in conventional debt securities. The securities are subject to all of the risks associated with an investment in our conventional debt securities (guaranteed by Citigroup Inc.), including the risk that we and Citigroup Inc. may default on our obligations under the securities, and are also subject to risks associated with the underlyings. Accordingly, the securities are suitable only for investors who are capable of understanding the complexities and risks of the securities. You should consult your own financial, tax and legal advisors as to the risks of an investment in the securities and the suitability of the securities in light of your particular circumstances.

The following is a summary of certain key risk factors for investors in the securities. You should read this summary together with the more detailed description of risks relating to an investment in the securities contained in the section “Risk Factors Relating to the Securities” beginning on page EA-7 in the accompanying product supplement. You should also carefully read the risk factors included in the accompanying prospectus supplement and in the documents incorporated by reference in the accompanying prospectus, including Citigroup Inc.’s most recent Annual Report on Form 10-K and any subsequent Quarterly Reports on Form 10-Q, which describe risks relating to the business of Citigroup Inc. more generally.

| § | You may lose some or all of your investment. Unlike conventional debt securities, the securities do not provide for the repayment of the stated principal amount at maturity in all circumstances. If the securities are not automatically redeemed prior to maturity, your payment at maturity will depend on the final basket value. If the final basket value is less than the initial basket value, you will lose 1% of the stated principal amount of the securities for every 1% by which the basket has declined from the initial basket value. There is no minimum payment at maturity on the securities, and you may lose up to all of your investment.

| § | Your potential return on the securities is limited. Your potential return on the securities is limited to the applicable premium payable upon automatic early redemption or at maturity, as described on the cover page of this pricing supplement. If the basket value on one of the valuation dates is greater than or equal to the initial basket value, you will be repaid the stated principal amount of your securities and will receive the fixed premium applicable to that valuation date, regardless of how significantly the basket value on that valuation date may exceed the initial basket value. Accordingly, any premium may result in a return on the securities that is significantly less than the return you could have achieved on a direct investment in the underlyings.

| § | The securities do not pay interest. You should not invest in the securities if you seek current income during the term of the securities.

| § | The securities may be automatically redeemed prior to maturity, limiting the term of the securities. If the basket value on any valuation date (other than the final valuation date) is greater than or equal to the initial basket value, the securities will be automatically redeemed. If the securities are automatically redeemed following any valuation date (other than the final valuation date), they will cease to be outstanding and you will not receive the premium applicable to any later valuation date. Moreover, you may not be able to reinvest your funds in another investment that provides a similar yield with a similar level of risk.

| § | The securities offer downside exposure to the basket, but no upside exposure to the basket. You will not participate in any appreciation in the value of the basket over the term of the securities. Consequently, your return on the securities will be limited to the applicable premium payable upon an automatic early redemption or at maturity and may be significantly less than the return on the basket over the term of the securities.

| § | You will not receive dividends or have any other rights with respect to the underlyings. You will not receive any dividends with respect to the underlyings. This lost dividend yield may be significant over the term of the securities. The payment scenarios described in this pricing supplement do not show any effect of such lost dividend yield over the term of the securities. In addition, you will not have voting rights or any other rights with respect to the underlyings or the stocks included in the underlyings.

| § | The performance of the securities will depend on the basket value solely on the valuation dates, which makes the securities particularly sensitive to volatility in the closing values of the underlyings that constitute the basket on or near the valuation dates. Whether the securities will be automatically redeemed prior to maturity will depend on the basket value solely on the valuation dates (other than the final valuation date), regardless of the basket value on other days during the term of the securities. If the securities are not automatically redeemed prior to maturity, what you receive at maturity will depend solely on the basket value on the final valuation date, and not on any other day during the term of the securities. Because the performance of the securities depends on the basket value on a limited number of dates, the securities will be particularly sensitive to volatility in the closing values of the underlyings that constitute the basket. You should understand that the closing values of the underlyings have historically been highly volatile.

| § | The securities are subject to the credit risk of Citigroup Global Markets Holdings Inc. and Citigroup Inc. If we default on our obligations under the securities and Citigroup Inc. defaults on its guarantee obligations, you may not receive anything owed to you under the securities.

| § | The securities will not be listed on any securities exchange and you may not be able to sell them prior to maturity. The securities will not be listed on any securities exchange. Therefore, there may be little or no secondary market for the securities. CGMI currently intends to make a secondary market in relation to the securities and to provide an indicative bid price for the securities on a daily basis. Any indicative bid price for the securities provided by CGMI will be determined in CGMI’s sole

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Citigroup Global Markets Holdings Inc.

discretion, taking into account prevailing market conditions and other relevant factors, and will not be a representation by CGMI that the securities can be sold at that price, or at all. CGMI may suspend or terminate making a market and providing indicative bid prices without notice, at any time and for any reason. If CGMI suspends or terminates making a market, there may be no secondary market at all for the securities because it is likely that CGMI will be the only broker-dealer that is willing to buy your securities prior to maturity. Accordingly, an investor must be prepared to hold the securities until maturity.

| § | The estimated value of the securities on the pricing date, based on CGMI’s proprietary pricing models and our internal funding rate, is less than the issue price. The difference is attributable to certain costs associated with selling, structuring and hedging the securities that are included in the issue price. These costs include (i) any selling concessions or other fees paid in connection with the offering of the securities, (ii) hedging and other costs incurred by us and our affiliates in connection with the offering of the securities and (iii) the expected profit (which may be more or less than actual profit) to CGMI or other of our affiliates in connection with hedging our obligations under the securities. These costs adversely affect the economic terms of the securities because, if they were lower, the economic terms of the securities would be more favorable to you. The economic terms of the securities are also likely to be adversely affected by the use of our internal funding rate, rather than our secondary market rate, to price the securities. See “The estimated value of the securities would be lower if it were calculated based on our secondary market rate” below.

| § | The estimated value of the securities was determined for us by our affiliate using proprietary pricing models. CGMI derived the estimated value disclosed on the cover page of this pricing supplement from its proprietary pricing models. In doing so, it may have made discretionary judgments about the inputs to its models, such as the volatility of the underlyings, the correlation between the underlyings, the dividend yields on the underlyings and interest rates. CGMI’s views on these inputs may differ from your or others’ views, and as an underwriter in this offering, CGMI’s interests may conflict with yours. Both the models and the inputs to the models may prove to be wrong and therefore not an accurate reflection of the value of the securities. Moreover, the estimated value of the securities set forth on the cover page of this pricing supplement may differ from the value that we or our affiliates may determine for the securities for other purposes, including for accounting purposes. You should not invest in the securities because of the estimated value of the securities. Instead, you should be willing to hold the securities to maturity irrespective of the initial estimated value.

| § | The estimated value of the securities would be lower if it were calculated based on our secondary market rate. The estimated value of the securities included in this pricing supplement is calculated based on our internal funding rate, which is the rate at which we are willing to borrow funds through the issuance of the securities. Our internal funding rate is generally lower than our secondary market rate, which is the rate that CGMI will use in determining the value of the securities for purposes of any purchases of the securities from you in the secondary market. If the estimated value included in this pricing supplement were based on our secondary market rate, rather than our internal funding rate, it would likely be lower. We determine our internal funding rate based on factors such as the costs associated with the securities, which are generally higher than the costs associated with conventional debt securities, and our liquidity needs and preferences. Our internal funding rate is not an interest rate that is payable on the securities.

Because there is not an active market for traded instruments referencing our outstanding debt obligations, CGMI determines our secondary market rate based on the market price of traded instruments referencing the debt obligations of Citigroup Inc., our parent company and the guarantor of all payments due on the securities, but subject to adjustments that CGMI makes in its sole discretion. As a result, our secondary market rate is not a market-determined measure of our creditworthiness, but rather reflects the market’s perception of our parent company’s creditworthiness as adjusted for discretionary factors such as CGMI’s preferences with respect to purchasing the securities prior to maturity.

| § | The estimated value of the securities is not an indication of the price, if any, at which CGMI or any other person may be willing to buy the securities from you in the secondary market. Any such secondary market price will fluctuate over the term of the securities based on the market and other factors described in the next risk factor. Moreover, unlike the estimated value included in this pricing supplement, any value of the securities determined for purposes of a secondary market transaction will be based on our secondary market rate, which will likely result in a lower value for the securities than if our internal funding rate were used. In addition, any secondary market price for the securities will be reduced by a bid-ask spread, which may vary depending on the aggregate stated principal amount of the securities to be purchased in the secondary market transaction, and the expected cost of unwinding related hedging transactions. As a result, it is likely that any secondary market price for the securities will be less than the issue price.

| § | The value of the securities prior to maturity will fluctuate based on many unpredictable factors. The value of your securities prior to maturity will fluctuate based on the closing values of the underlyings, the volatility of and correlation between the closing values of the underlyings, the dividend yields on the underlyings, interest rates generally, the time remaining to maturity and our and Citigroup Inc.’s creditworthiness, as reflected in our secondary market rate, among other factors described under “Risk Factors Relating to the Securities—Risk Factors Relating to All Securities—The value of your securities prior to maturity will fluctuate based on many unpredictable factors” in the accompanying product supplement. Changes in the closing values of the underlyings may not result in a comparable change in the value of your securities. You should understand that the value of your securities at any time prior to maturity may be significantly less than the issue price.

| § | Immediately following issuance, any secondary market bid price provided by CGMI, and the value that will be indicated on any brokerage account statements prepared by CGMI or its affiliates, will reflect a temporary upward adjustment. The

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Citigroup Global Markets Holdings Inc.

amount of this temporary upward adjustment will steadily decline to zero over the temporary adjustment period. See “Valuation of the Securities” in this pricing supplement.

| § | The underlyings are subject to risks associated with non-U.S. markets, and the iShares® China Large-Cap ETF, in particular, is subject to risks associated with emerging markets. Investments linked to the value of non-U.S. stocks involve risks associated with the securities markets in those countries, including risks of volatility in those markets, governmental intervention in those markets and cross-shareholdings in companies in certain countries. Also, there is generally less publicly available information about companies in some of these jurisdictions than about U.S. companies that are subject to the reporting requirements of the SEC. Further, non-U.S. companies are generally subject to accounting, auditing and financial reporting standards and requirements and securities trading rules that are different from those applicable to U.S. reporting companies. The prices of securities in foreign markets may be affected by political, economic, financial and social factors in those countries, or global regions, including changes in government, economic and fiscal policies and currency exchange laws. Moreover, the economies in such countries may differ favorably or unfavorably from the economy of the United States in such respects as growth of gross national product, rate of inflation, capital reinvestment, resources and self-sufficiency.

With respect to the iShares® China Large-Cap ETF, stocks issued by companies in emerging markets may be subject to heightened risks, including risks of relatively unstable governments, nationalization of businesses, restrictions on foreign ownership, prohibitions on the repatriation of assets and less protection of property rights. The economies of countries with emerging markets may be based on only a few industries, be highly vulnerable to changes in local or global trade conditions and suffer from extreme and volatile debt burdens or inflation rates. Local securities markets may trade a small number of securities and be unable to respond effectively to increases in trading volume, potentially increasing price volatility.

| § | The performance of the EURO STOXX 50® Index, the FTSE® 100 Index, the Nikkei 225 Index, the S&P/ASX 200 Index and the Swiss Market Index® will not be adjusted for changes in currency exchange rates. The EURO STOXX 50® Index is composed of stocks traded in euro, the FTSE® 100 Index is composed of stocks traded in pound sterling, the Nikkei 225 Index is composed of stocks traded in Japanese yen, the S&P/ASX 200 Index is composed of stocks traded in Australian dollars and the Swiss Market Index® is composed of stocks traded in Swiss franc. The value of each of these foreign currencies may be subject to a high degree of fluctuation relative to the U.S. dollar. However, the performance of these underlyings and the value of the securities will not be adjusted for exchange rate fluctuations. If the euro, pound sterling, Japanese yen, Australian dollar and/or Swiss franc appreciates relative to the U.S. dollar over the term of the securities, your return on the securities will underperform an alternative investment that offers exposure to that appreciation in addition to the changes in the values of the underlyings.

| § | Fluctuations in exchange rates will affect the closing value of the iShares® China Large-Cap ETF. Because the iShares® China Large-Cap ETF includes stocks that trade outside the United States and the closing value of the iShares® China Large-Cap ETF is based on the U.S. dollar value of those stocks, the iShares® China Large-Cap ETF is subject to currency exchange rate risk with respect to the currency in which such stocks trade. Exchange rate movements may be volatile and may be driven by numerous factors specific to the relevant countries, including the supply of, and the demand for, the applicable currencies, as well as government policy and intervention and macroeconomic factors. Exchange rate movements may also be influenced significantly by speculative trading. In general, if the U.S. dollar strengthens against the currency in which the stocks included in the iShares® China Large-Cap ETF trade, the closing value of the iShares® China Large-Cap ETF will be adversely affected for that reason alone.

| § | Recent executive orders may adversely affect the performance of the iShares® China Large-Cap ETF. Pursuant to recent executive orders, U.S. persons are prohibited from engaging in transactions in, or possession of, publicly traded securities of certain companies that are determined to be linked to the People’s Republic of China military, intelligence and security apparatus, or securities that are derivative of, or are designed to provide investment exposure to, those securities. If the issuer of any of the equity securities held by the iShares® China Large-Cap ETF is in the future designated as such a prohibited company, the value of that company may be adversely affected, perhaps significantly, which would adversely affect the performance of the iShares® China Large-Cap ETF. In addition, under these circumstances, each of the sponsor of the underlying index for the iShares® China Large-Cap ETF and the iShares® China Large-Cap ETF is expected to remove the equity securities of that company from the underlying index and iShares® China Large-Cap ETF, respectively. Any changes to the composition of the iShares® China Large-Cap ETF in response to these executive orders could adversely affect the performance of the iShares® China Large-Cap ETF, and therefore the value of the securities.

| § | Changes in the closing values of the underlyings may offset each other. The performances of the underlyings may not be correlated with each other. If one of the underlyings appreciates, the other underlyings may not appreciate as much or may even depreciate. In such event, the appreciation of one of the underlyings may be moderated, wholly offset or more than offset by lesser appreciation or by depreciation in the value of the other underlyings.

| § | The underlyings may be highly correlated in decline. The performances of the underlyings may become highly correlated during periods of declining prices. This may occur because of events that have broad effects on markets generally or on the markets that the underlyings track. If the underlyings become correlated in decline, the depreciation of one underlying will not be offset by the performance of the other underlyings and, in fact, each underlying may contribute to an overall decline from the initial basket value to the final basket value.

| § | An investment in the securities is not a diversified investment. The fact that the securities are linked to a basket does not mean that the securities represent a diversified investment. First, although the underlyings differ in important respects, they each track the performance of equity markets, and each may perform poorly if there is a global downturn in equity markets. Second, the

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Citigroup Global Markets Holdings Inc.

securities are subject to the credit risk of Citigroup Global Markets Holdings Inc. and Citigroup Inc. No amount of diversification that may be represented by the underlyings will offset the risk that we and Citigroup Inc. may default on our obligations.

| § | Our offering of the securities is not a recommendation of the basket or the underlyings. The fact that we are offering the securities does not mean that we believe that investing in an instrument linked to the basket or any of the underlyings is likely to achieve favorable returns. In fact, as we are part of a global financial institution, our affiliates may have positions (including short positions) in the underlyings or in instruments related to the underlyings, and may publish research or express opinions, that in each case are inconsistent with an investment linked to the underlyings. These and other activities of our affiliates may affect the closing values of the underlyings in a way that negatively affects the value of and your return on the securities.

| § | The underlyings are unequally weighted. Accordingly, the performance of an underlying with a higher weighting will influence the performance of the securities to a greater degree than the performance of an underlying with a lower weighting. If an underlying with a higher weighting performs poorly, its poor performance could negate or diminish the effect on the basket return of any positive performance by a lower-weighted underlying.

| § | The closing value of an underlying may be adversely affected by our or our affiliates’ hedging and other trading activities. We expect to hedge our obligations under the securities through CGMI or other of our affiliates, who may take positions in the underlyings or in financial instruments related to the underlyings and may adjust such positions during the term of the securities. Our affiliates also take positions in the underlyings or in financial instruments related to the underlyings on a regular basis (taking long or short positions or both), for their accounts, for other accounts under their management or to facilitate transactions on behalf of customers. These activities could affect the closing values of the underlyings in a way that negatively affects the value of and your return on the securities. They could also result in substantial returns for us or our affiliates while the value of the securities declines.

| § | We and our affiliates may have economic interests that are adverse to yours as a result of our affiliates’ business activities. Our affiliates engage in business activities with a wide range of companies. These activities include extending loans, making and facilitating investments, underwriting securities offerings and providing advisory services. These activities could involve or affect the underlyings in a way that negatively affects the value of and your return on the securities. They could also result in substantial returns for us or our affiliates while the value of the securities declines. In addition, in the course of this business, we or our affiliates may acquire non-public information, which will not be disclosed to you.

| § | The calculation agent, which is an affiliate of ours, will make important determinations with respect to the securities. If certain events occur during the term of the securities, such as market disruption events and other events with respect to an underlying, CGMI, as calculation agent, will be required to make discretionary judgments that could significantly affect your return on the securities. In making these judgments, the calculation agent’s interests as an affiliate of ours could be adverse to your interests as a holder of the securities. See “Risk Factors Relating to the Securities—Risk Factors Relating to All Securities—The calculation agent, which is an affiliate of ours, will make important determinations with respect to the securities” in the accompanying product supplement.

| § | In the case of an underlying that is an underlying ETF, even if the underlying pays a dividend that it identifies as special or extraordinary, no adjustment will be required under the securities for that dividend unless it meets the criteria specified in the accompanying product supplement. In general, an adjustment will not be made under the terms of the securities for any cash dividend paid by the underlying unless the amount of the dividend per share, together with any other dividends paid in the same quarter, exceeds the dividend paid per share in the most recent quarter by an amount equal to at least 10% of the closing value of that underlying on the date of declaration of the dividend. Any dividend will reduce the closing value of the underlying by the amount of the dividend per share. If the underlying pays any dividend for which an adjustment is not made under the terms of the securities, holders of the securities will be adversely affected. See “Description of the Securities—Certain Additional Terms for Securities Linked to an Underlying Company or an Underlying ETF—Dilution and Reorganization Adjustments—Certain Extraordinary Cash Dividends” in the accompanying product supplement.

| § | In the case of an underlying that is an underlying ETF, the securities will not be adjusted for all events that may have a dilutive effect on or otherwise adversely affect the closing value of the underlying. For example, we will not make any adjustment for ordinary dividends or extraordinary dividends that do not meet the criteria described above, partial tender offers or additional underlying share issuances. Moreover, the adjustments we do make may not fully offset the dilutive or adverse effect of the particular event. Investors in the securities may be adversely affected by such an event in a circumstance in which a direct holder of the underlying shares of the underlying would not.

| § | In the case of an underlying that is an underlying ETF, the securities may become linked to an underlying other than the original underlying upon the occurrence of a reorganization event or upon the delisting of the underlying shares of that original underlying. For example, if the underlying enters into a merger agreement that provides for holders of its underlying shares to receive shares of another entity and such shares are marketable securities, the closing value of that underlying following consummation of the merger will be based on the value of such other shares. Additionally, if the underlying shares of the underlying are delisted, the calculation agent may select a successor underlying. See “Description of the Securities—Certain Additional Terms for Securities Linked to an Underlying Company or an Underlying ETF” in the accompanying product supplement.

| § | In the case of the underlying that is an underlying ETF, the value and performance of the underlying shares of the underlying may not completely track the performance of the underlying index that the underlying seeks to track or the net asset value per share of the underlying. In the case of the underlying that is an underlying ETF, the underlying does not fully

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Citigroup Global Markets Holdings Inc.

replicate the underlying index that it seeks to track and may hold securities different from those included in its underlying index. In addition, the performance of the underlying will reflect additional transaction costs and fees that are not included in the calculation of its underlying index. All of these factors may lead to a lack of correlation between the performance of the underlying and its underlying index. In addition, corporate actions with respect to the equity securities held by the underlying (such as mergers and spin-offs) may impact the variance between the performance of the underlying and its underlying index. Finally, because the underlying shares are traded on an exchange and are subject to market supply and investor demand, the closing value of the underlying may differ from the net asset value per share of the underlying.

During periods of market volatility, securities included in the underlying’s underlying index may be unavailable in the secondary market, market participants may be unable to calculate accurately the net asset value per share of the underlying and the liquidity of the underlying may be adversely affected. This kind of market volatility may also disrupt the ability of market participants to create and redeem shares of the underlying. Further, market volatility may adversely affect, sometimes materially, the price at which market participants are willing to buy and sell the underlying shares. As a result, under these circumstances, the closing value of the underlying may vary substantially from the net asset value per share of the underlying. For all of the foregoing reasons, the performance of the underlying may not correlate with the performance of its underlying index and/or its net asset value per share, which could materially and adversely affect the value of the securities and/or reduce your return on the securities.

| § | Changes that affect the underlyings may affect the value of your securities. The sponsors of the underlyings may at any time make methodological changes or other changes in the manner in which they operate that could affect the values of the underlyings. We are not affiliated with any such underlying sponsor and, accordingly, we have no control over any changes any such sponsor may make. Such changes could adversely affect the performance of the underlyings and the value of and your return on the securities.

| § | The U.S. federal tax consequences of an investment in the securities are unclear. There is no direct legal authority regarding the proper U.S. federal tax treatment of the securities, and we do not plan to request a ruling from the Internal Revenue Service (the “IRS”). Consequently, significant aspects of the tax treatment of the securities are uncertain, and the IRS or a court might not agree with the treatment of the securities as prepaid forward contracts. If the IRS were successful in asserting an alternative treatment of the securities, the tax consequences of the ownership and disposition of the securities might be materially and adversely affected. Even if the treatment of the securities as prepaid forward contracts is respected, a security may be treated as a “constructive ownership transaction,” with potentially adverse consequences described below under “United States Federal Tax Considerations.” Moreover, future legislation, Treasury regulations or IRS guidance could adversely affect the U.S. federal tax treatment of the securities, possibly retroactively.

If you are a non-U.S. investor, you should review the discussion of withholding tax issues in “United States Federal Tax Considerations—Non-U.S. Holders” below.

You should read carefully the discussion under “United States Federal Tax Considerations” and “Risk Factors Relating to the Securities” in the accompanying product supplement and “United States Federal Tax Considerations” in this pricing supplement. You should also consult your tax adviser regarding the U.S. federal tax consequences of an investment in the securities, as well as tax consequences arising under the laws of any state, local or non-U.S. taxing jurisdiction.

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Citigroup Global Markets Holdings Inc.

Hypothetical Historical Information About the Basket

Because the basket exists solely for purposes of these securities, historical information on the performance of the basket does not exist for dates prior to the pricing date for these securities. The graph below sets forth the hypothetical historical daily values of the basket for the period from January 5, 2015 to November 6, 2025, assuming that the basket was created on January 5, 2015 with the same underlyings and corresponding weights in the basket and with a value of 100 on that date. The hypothetical performance of the basket is based on the actual closing values of the underlyings on the applicable dates. We obtained these closing values from Bloomberg L.P., without independent verification. Any historical trend in the value of the basket during the period shown below is not an indication of the performance of the basket during the term of the securities.

Hypothetical Historical Basket Performance January 5, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

Information About the EURO STOXX 50® Index

The EURO STOXX 50® Index is composed of 50 component stocks of market sector leaders from within the EURO STOXX Supersector indices, which represent the Eurozone portion of the STOXX Europe 600® Supersector indices. The STOXX Europe 600® Supersector indices contain the 600 largest stocks traded on the major exchanges of certain European countries. The EURO STOXX 50® Index is calculated and maintained by STOXX Limited.

Please refer to the section “Equity Index Descriptions—The STOXX Benchmark Indices—The EURO STOXX 50® Index” in the accompanying underlying supplement for additional information.

We have derived all information regarding the EURO STOXX 50® Index from publicly available information and have not independently verified any information regarding the EURO STOXX 50® Index. This pricing supplement relates only to the securities and not to the EURO STOXX 50® Index. We make no representation as to the performance of the EURO STOXX 50® Index over the term of the securities.

The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. The sponsor of the EURO STOXX 50® Index is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

Historical Information

The closing value of the EURO STOXX 50® Index on November 6, 2025 was 5,611.18.

The graph below shows the closing value of the EURO STOXX 50® Index for each day such value was available from January 2, 2015 to November 6, 2025. We obtained the closing values from Bloomberg L.P., without independent verification. You should not take historical closing values as an indication of future performance.

EURO STOXX 50® Index – Historical Closing Values January 2, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

Information About the FTSE® 100 Index

The FTSE® 100 Index measures the composite price performance of stocks of the largest 100 companies (determined on the basis of market capitalization) traded on the London Stock Exchange. It is calculated and maintained by FTSE Russell.

Please refer to the section “Equity Index Descriptions—The FTSE® 100 Index” in the accompanying underlying supplement for additional information.

We have derived all information regarding the FTSE® 100 Index from publicly available information and have not independently verified any information regarding the FTSE® 100 Index. This pricing supplement relates only to the securities and not to the FTSE® 100 Index. We make no representation as to the performance of the FTSE® 100 Index over the term of the securities.

The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. The sponsor of the FTSE® 100 Index is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

Historical Information

The closing value of the FTSE® 100 Index on November 6, 2025 was 9,735.78.

The graph below shows the closing value of the FTSE® 100 Index for each day such value was available from January 2, 2015 to November 6, 2025. We obtained the closing values from Bloomberg L.P., without independent verification. You should not take historical closing values as an indication of future performance.

FTSE® 100 Index – Historical Closing Values January 2, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

Information About the Nikkei 225 Index

The Nikkei 225 Index is a stock index that measures the composite price performance of selected Japanese stocks. The Nikkei 225 Index is currently based on 225 underlying stocks trading on the Tokyo Stock Exchange representing a broad cross-section of Japanese industries. Non-ordinary shares, such as shares of ETFs, REITs, preferred stock or other preferred securities or tracking stocks, are excluded from the Nikkei 225 Index. It is calculated and maintained by Nikkei Inc.

Please refer to the section “Equity Index Descriptions—The Nikkei 225 Index” in the accompanying underlying supplement, as supplemented by the following updated information.

Effective October 2022, if the weight of any Nikkei Underlying Stock exceeds a certain threshold (the “weight cap threshold”) on the base date of a periodic review, a capping ratio will be applied to decrease the weight of that Nikkei Underlying Stock. The weight cap threshold for any Nikkei Underlying Stock is (i) 12% as of the October 2022 periodic review, (ii) 11% as of the October 2023 periodic review and (iii) 10% as of the October 2024 periodic review. For any Nikkei Underlying Stock to which a capping ratio is applied, the price of that Nikkei Underlying Stock is adjusted by a capped price adjustment factor (“CPAF”) equal to (i) the capping ratio multiplied by (ii) the PAF (as defined under “Indices—The Nikkei 225 Index—Calculation of the Nikkei 225 Index” in the accompanying underlying supplement).

If, on the base date of a periodic review, the weight of any Nikkei Underlying Stock exceeds the weight cap threshold and a capping ratio does not already apply to that Nikkei Underlying Stock, a capping ratio of 0.9 is applied on the effective date of the periodic review. If a capping ratio already applies to any Nikkei Underlying Stock, the capping ratio will be decreased in increments of 0.1 on the effective date of the periodic review until there is a change in the CPAF. If, on the base date of a periodic change, the weight of a Nikkei Underlying Stock to which a capping ratio is applied is below 5%, the capping ratio will be increased in increments of 0.1 on the effective date of the periodic review until there is a change in the CPAF; however, the capping ratio will be canceled if it increases to 1.0. When a Nikkei Underlying Stock to which a capping ratio is applied effects a large-scale stock split or reverse split and the PAF is adjusted by the ratio of the split or reverse split, the capping ratio may be revised as necessary to ensure that the new CPAF does not change the weight of that Nikkei Underlying Stock.

In addition, as of October 2022, the Nikkei Underlying Stocks are reviewed semiannually with base dates at the end of January and July, and results of each review are applied on the first trading day in April and October, respectively.

We have derived all information regarding the Nikkei 225 Index from publicly available information and have not independently verified any information regarding the Nikkei 225 Index. This pricing supplement relates only to the securities and not to the Nikkei 225 Index. We make no representation as to the performance of the Nikkei 225 Index over the term of the securities.

The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. The sponsor of the Nikkei 225 Index is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

Historical Information

The closing value of the Nikkei 225 Index on November 6, 2025 was 50,883.68.

The graph below shows the closing value of the Nikkei 225 Index for each day such value was available from January 5, 2015 to November 6, 2025. We obtained the closing values from Bloomberg L.P., without independent verification. You should not take historical closing values as an indication of future performance.

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Citigroup Global Markets Holdings Inc.

Nikkei 225 Index – Historical Closing Values January 5, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

Information About the S&P/ASX 200 Index

The S&P/ASX 200 Index measures the performance of the 200 largest index-eligible stocks listed on the Australian Securities Exchange (the “ASX”) by float-adjusted market capitalization, and is widely considered Australia’s benchmark index. It is calculated and maintained by S&P Dow Jones Indices LLC.

Please refer to the section “Equity Index Descriptions—The S&P/ASX 200 Index” in the accompanying underlying supplement for additional information.

We have derived all information regarding the S&P/ASX 200 Index from publicly available information and have not independently verified any information regarding the S&P/ASX 200 Index. This pricing supplement relates only to the securities and not to the S&P/ASX 200 Index. We make no representation as to the performance of the S&P/ASX 200 Index over the term of the securities.

The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. The sponsor of the S&P/ASX 200 Index is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

Historical Information

The closing value of the S&P/ASX 200 Index on November 6, 2025 was 8,828.271.

The graph below shows the closing value of the S&P/ASX 200 Index for each day such value was available from January 2, 2015 to November 6, 2025. We obtained the closing values from Bloomberg L.P., without independent verification. You should not take historical closing values as an indication of future performance.

S&P/ASX 200 Index – Historical Closing Values January 2, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

Information About the Swiss Market Index®

The Swiss Market Index (“SMI®”) is a free-float adjusted market capitalization-weighted price return index of the Swiss equity market. It is calculated and maintained by SIX Swiss Exchange Ltd (“SIX Swiss Exchange”).

Please refer to the section “Equity Index Descriptions—The Swiss Market Index” in the accompanying underlying supplement for additional information.

We have derived all information regarding the Swiss Market Index® from publicly available information and have not independently verified any information regarding the Swiss Market Index®. This pricing supplement relates only to the securities and not to the Swiss Market Index®. We make no representation as to the performance of the Swiss Market Index® over the term of the securities.

The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. The sponsor of the Swiss Market Index® is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

Historical Information

The closing value of the Swiss Market Index® on November 6, 2025 was 12,298.86.

The graph below shows the closing value of the Swiss Market Index® for each day such value was available from January 5, 2015 to November 6, 2025. We obtained the closing values from Bloomberg L.P., without independent verification. You should not take historical closing values as an indication of future performance.

Swiss Market Index® – Historical Closing Values January 5, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

Information About the iShares® China Large-Cap ETF

The iShares® China Large-Cap ETF is an exchange-traded fund that seeks to track the investment results, before fees and expenses, of an index composed of large-capitalization Chinese equities that trade on the Hong Kong Stock Exchange, which is currently the FTSE® China 50 Index. The FTSE® China 50 Index is composed of 50 of the largest and most liquid Chinese stocks trading on the Hong Kong Stock Exchange and is designed to measure the performance of the largest companies in the Chinese equity market that trade on the Hong Kong Stock Exchange and are available to international investors.

The iShares® China Large-Cap ETF is an investment portfolio managed by iShares® Trust. BlackRock Fund Advisors is the investment adviser to the iShares® China Large-Cap ETF. iShares® Trust is a registered investment company that consists of numerous separate investment portfolios, including the iShares® China Large-Cap ETF.

Information provided to or filed with the SEC by iShares® Trust pursuant to the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, can be located by reference to SEC file numbers 333-92935 and 811-09729, respectively, through the SEC’s website at http://www.sec.gov. In addition, information may be obtained from other sources including, but not limited to, press releases, newspaper articles and other publicly disseminated documents. The underlying shares of the iShares® China Large-Cap ETF trade on the NYSE Arca under the ticker symbol “FXI.”

We have derived all information regarding the iShares® China Large-Cap ETF from publicly available information and have not independently verified any information regarding the iShares® China Large-Cap ETF. This pricing supplement relates only to the securities and not to the iShares® China Large-Cap ETF. We make no representation as to the performance of the iShares® China Large-Cap ETF over the term of the securities.

The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. The sponsor of the iShares® China Large-Cap ETF is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

Historical Information

The closing value of the iShares® China Large-Cap ETF on November 6, 2025 was $40.14.

The graph below shows the closing value of the iShares® China Large-Cap ETF for each day such value was available from January 2, 2015 to November 6, 2025. We obtained the closing values from Bloomberg L.P., without independent verification. You should not take historical closing values as an indication of future performance.

iShares® China Large-Cap ETF – Historical Closing Values January 2, 2015 to November 6, 2025

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Citigroup Global Markets Holdings Inc.

United States Federal Tax Considerations

You should read carefully the discussion under “United States Federal Tax Considerations” and “Risk Factors Relating to the Securities” in the accompanying product supplement and “Summary Risk Factors” in this pricing supplement.

In the opinion of our counsel, Davis Polk & Wardwell LLP, a security should be treated as a prepaid forward contract for U.S. federal income tax purposes. By purchasing a security, you agree (in the absence of an administrative determination or judicial ruling to the contrary) to this treatment. There is uncertainty regarding this treatment, and the IRS or a court might not agree with it. Moreover, our counsel’s opinion is based on market conditions as of the date of this preliminary pricing supplement and is subject to confirmation on the pricing date.

Assuming this treatment of the securities is respected and subject to the discussion in “United States Federal Tax Considerations” in the accompanying product supplement, the following U.S. federal income tax consequences should result under current law:

| · | You should not recognize taxable income over the term of the securities prior to maturity, other than pursuant to a sale or exchange.

| · | Upon a sale or exchange of a security (including retirement at maturity), you should recognize gain or loss equal to the difference between the amount realized and your tax basis in the security. Subject to the discussion below concerning the potential application of the “constructive ownership” rules under Section 1260 of the Code, any gain or loss recognized upon a sale, exchange or retirement of a security should be long-term capital gain or loss if you held the security for more than one year.

Even if the treatment of the securities as prepaid forward contracts is respected, your purchase of a security may be treated as entry into a “constructive ownership transaction,” within the meaning of Section 1260 of the Code. In that case, all or a portion of any long-term capital gain you would otherwise recognize in respect of your securities would be recharacterized as ordinary income to the extent such gain exceeded the “net underlying long-term capital gain.” Any long-term capital gain recharacterized as ordinary income under Section 1260 would be treated as accruing at a constant rate over the period you held your securities, and you would be subject to an interest charge in respect of the deemed tax liability on the income treated as accruing in prior tax years. Due to the lack of governing authority under Section 1260, our counsel is not able to opine as to whether or how Section 1260 applies to the securities. You should read the section entitled “United States Federal Tax Considerations—Tax Consequences to U.S. Holders—Securities Treated as Prepaid Forward Contracts—Possible Application of Section 1260 of the Code” in the accompanying product supplement for additional information and consult your tax adviser regarding the potential application of the “constructive ownership” rule.

We do not plan to request a ruling from the IRS regarding the treatment of the securities. An alternative characterization of the securities could materially and adversely affect the tax consequences of ownership and disposition of the securities, including the timing and character of income recognized. In addition, the U.S. Treasury Department and the IRS have requested comments on various issues regarding the U.S. federal income tax treatment of “prepaid forward contracts” and similar financial instruments and have indicated that such transactions may be the subject of future regulations or other guidance. Furthermore, members of Congress have proposed legislative changes to the tax treatment of derivative contracts. Any legislation, Treasury regulations or other guidance promulgated after consideration of these issues could materially and adversely affect the tax consequences of an investment in the securities, possibly with retroactive effect. You should consult your tax adviser regarding possible alternative tax treatments of the securities and potential changes in applicable law.

Non-U.S. Holders. Subject to the discussions below and in “United States Federal Tax Considerations” in the accompanying product supplement, if you are a Non-U.S. Holder (as defined in the accompanying product supplement) of the securities, you generally should not be subject to U.S. federal withholding or income tax in respect of any amount paid to you with respect to the securities, provided that (i) income in respect of the securities is not effectively connected with your conduct of a trade or business in the United States, and (ii) you comply with the applicable certification requirements.

As discussed under “United States Federal Tax Considerations—Tax Consequences to Non-U.S. Holders” in the accompanying product supplement, Section 871(m) of the Code and Treasury regulations promulgated thereunder (“Section 871(m)”) generally impose a 30% withholding tax on dividend equivalents paid or deemed paid to Non-U.S. Holders with respect to certain financial instruments linked to U.S. equities (“U.S. Underlying Equities”) or indices that include U.S. Underlying Equities. Section 871(m) generally applies to instruments that substantially replicate the economic performance of one or more U.S. Underlying Equities, as determined based on tests set forth in the applicable Treasury regulations. However, the regulations, as modified by an IRS notice, exempt financial instruments issued prior to January 1, 2027 that do not have a “delta” of one. Based on the terms of the securities and representations provided by us as of the date of this preliminary pricing supplement, our counsel is of the opinion that the securities should not be treated as transactions that have a “delta” of one within the meaning of the regulations with respect to any U.S. Underlying Equity and, therefore, should not be subject to withholding tax under Section 871(m). However, the final determination regarding the treatment of the securities under Section 871(m) will be made as of the pricing date for the securities, and it is possible that the securities will be subject to withholding tax under Section 871(m) based on the circumstances as of that date.

A determination that the securities are not subject to Section 871(m) is not binding on the IRS, and the IRS may disagree with this treatment. Moreover, Section 871(m) is complex and its application may depend on your particular circumstances, including your other transactions. You should consult your tax adviser regarding the potential application of Section 871(m) to the securities.

If withholding tax applies to the securities, we will not be required to pay any additional amounts with respect to amounts withheld.

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Citigroup Global Markets Holdings Inc.

You should read the section entitled “United States Federal Tax Considerations” in the accompanying product supplement. The preceding discussion, when read in combination with that section, constitutes the full opinion of Davis Polk & Wardwell LLP regarding the material U.S. federal tax consequences of owning and disposing of the securities.

You should also consult your tax adviser regarding all aspects of the U.S. federal income and estate tax consequences of an investment in the securities and any tax consequences arising under the laws of any state, local or non-U.S. taxing jurisdiction.

Supplemental Plan of Distribution

CGMI, an affiliate of Citigroup Global Markets Holdings Inc. and the underwriter of the sale of the securities, is acting as principal and will receive an underwriting fee of up to $22.50 for each security sold in this offering. The actual underwriting fee will be equal to the selling concession provided to selected dealers, as described in this paragraph. From this underwriting fee, CGMI will pay selected dealers not affiliated with CGMI a variable selling concession of up to $22.50 for each security they sell. For the avoidance of doubt, any fees or selling concessions described in this pricing supplement will not be rebated if the securities are automatically redeemed prior to maturity.

See “Plan of Distribution; Conflicts of Interest” in the accompanying product supplement and “Plan of Distribution” in each of the accompanying prospectus supplement and prospectus for additional information.

Valuation of the Securities

CGMI calculated the estimated value of the securities set forth on the cover page of this pricing supplement based on proprietary pricing models. CGMI’s proprietary pricing models generated an estimated value for the securities by estimating the value of a hypothetical package of financial instruments that would replicate the payout on the securities, which consists of a fixed-income bond (the “bond component”) and one or more derivative instruments underlying the economic terms of the securities (the “derivative component”). CGMI calculated the estimated value of the bond component using a discount rate based on our internal funding rate. CGMI calculated the estimated value of the derivative component based on a proprietary derivative-pricing model, which generated a theoretical price for the instruments that constitute the derivative component based on various inputs, including the factors described under “Summary Risk Factors—The value of the securities prior to maturity will fluctuate based on many unpredictable factors” in this pricing supplement, but not including our or Citigroup Inc.’s creditworthiness. These inputs may be market-observable or may be based on assumptions made by CGMI in its discretionary judgment.

The estimated value of the securities is a function of the terms of the securities and the inputs to CGMI’s proprietary pricing models. As of the date of this preliminary pricing supplement, it is uncertain what the estimated value of the securities will be on the pricing date because certain terms of the securities have not yet been fixed and because it is uncertain what the values of the inputs to CGMI’s proprietary pricing models will be on the pricing date.

For a period of approximately three months following issuance of the securities, the price, if any, at which CGMI would be willing to buy the securities from investors, and the value that will be indicated for the securities on any brokerage account statements prepared by CGMI or its affiliates (which value CGMI 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 a portion of the hedging profit expected to be realized by CGMI or its affiliates over the term of the securities. The amount of this temporary upward adjustment will decline to zero on a straight-line basis over the three-month temporary adjustment period. However, CGMI is not obligated to buy the securities from investors at any time. See “Summary Risk Factors—The securities will not be listed on any securities exchange and you may not be able to sell them prior to maturity.”

Contact

Clients may contact their local brokerage representative. Third-party distributors may contact Citi Structured Investment Sales at (212) 723-7005.

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