Preliminary Terms This summary of terms is not complete and should be read with the pricing supplement below Citigroup Global Markets Holdings Inc. Issuer : Citigroup Inc. Guarantor: iShares® MSCI EAFE ETF (ticker: “EFA”) and S&P 500 ® Index (ticker: “SPX”) Underlyings : November 6, 2026 Pricing date: November 6, 2028 Valuation date: November 9, 2028 Maturity date: 17334DJ52 / US17334DJ520 CUSIP / ISIN: For each underlying, its closing value on the pricing date Initial underlying value: For each underlying, its closing value on the valuation date Final underlying value: For each underlying, (final underlying value - initial underlying value) / initial underlying value Underlying return: The underlying with the lowest underlying return Worst performer: You will receive at maturity for each security you then hold: • If the final underlying value of the worst performer is greater than its initial underlying value: $1,000 + ($1,000 × the underlying return of the worst performer × the upside participation rate), subject to the maximum return at maturity • If the final underlying value of the worst performer is less than or equal to its initial underlying value: $1,000 + ($1,000 × the underlying return of the worst performer), subject to the minimum payment at maturity If the final underlying value of the worst performer depreciates from its initial underlying value, you will be exposed to the first 5% of that depreciation and your payment at maturity will be less than the stated principal amount per security. You should not invest in the securities unless you are willing and able to bear the risk of losing up to $50 per security. Payment at Maturity: $485.00 per security (48.50% of the stated principal amount) Maximum return at maturity: $950.00 per security (95.00% of the stated principal amount) Minimum payment at maturity: 100% Upside participation rate: $1,000 per security Stated principal amount: Preliminary Pricing Supplement dated October 23, 2026 Pricing Supplement: Citigroup Global Markets Holdings Inc. Guaranteed by Citigroup Inc. Market - Linked Securities Linked to Worst of EFA and SPX Hypothetical Payment at Maturity Hypothetical Payment at Maturity Hypothetical Security Return Hypothetical Worst Performer Underlying Return $1,485.00 48.50% 100.00% D $1,485.00 48.50% 75.00% $1,485.00 48.50% 48.50% $1,450.00 45.00% 45.00% C $1,250.00 25.00% 25.00% $1,100.00 10.00% 10.00% $1,000.00 0.00% 0.00% $975.00 - 2.50% - 2.50% B $950.00 - 5.00% - 5.00% $950.00 - 5.00% - 10.00% A $950.00 - 5.00% - 25.00% $950.00 - 5.00% - 50.00% $950.00 - 5.00% - 75.00% $950.00 - 5.00% - 100.00% B A C D

Selected Risk Considerations • You may not receive any positive return on your investment in the securities and may lose up to 5% of your investment. You will receive a positive return on your investment in the securities only if the worst performer appreciates from its initial underlying value to its final underlying value. If the final underlying value of the worst performer is less than its initial underlying value, you will lose 1% of the stated principal amount of the securities for every 1% by which its final underlying value is less than its initial underlying value, subject to a maximum loss of 5% of your investment. • The securities do not pay interest. • Your potential return on the securities is limited. • Although the securities limit your loss at maturity to 5%, you may nevertheless suffer additional losses on your investment in real value terms if the worst performer declines or does not appreciate sufficiently from its initial underlying value to its final underlying value. • The securities are subject to heightened risk because they have multiple underlyings. • The securities are subject to the risks of each of the underlyings and will be negatively affected if any one underlying performs poorly. • You will not benefit in any way from the performance of any better performing underlying. • You will be subject to risks relating to the relationship between the underlyings . • You will not receive dividends or have any other rights with respect to the underlyings . • Your payment at maturity depends on the closing value of the worst performer on a single day. • The securities are subject to the credit risk of Citigroup Global Markets Holdings Inc. and Citigroup Inc. If Citigroup Global Markets Holdings Inc. defaults on its 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 estimated value of the securities on the pricing date is less than the issue price. For more information about the estimated value of the securities, see the accompanying preliminary pricing supplement. • The value of the securities prior to maturity will fluctuate based on many unpredictable factors. • The iShares® MSCI EAFE ETF is subject to risks associated with non - U.S. markets. • Fluctuations in exchange rates will affect the closing value of the iShares® MSCI EAFE ETF. • 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 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. • 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. • In the case of an 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. • The issuer and its affiliates may have conflicts of interest with you. The above summary of selected risks does not describe all of the risks associated with an investment in the securities. You should read the accompanying preliminary pricing supplement and product supplement for a more complete description of risks relating to the securities. Additional Information Citigroup Global Markets Holdings Inc. and Citigroup Inc. have filed registration statements (including the accompanying preliminary pricing supplement, product supplement, underlying supplement, prospectus supplement and prospectus) with the Securities and Exchange Commission (“SEC”) for the offering to which this communication relates. Before you invest, you should read the accompanying preliminary pricing supplement, product supplement, underlying supplement, prospectus supplement and prospectus in those registration statements (File Nos. 333 - 293732 and 333 - 293732 - 02) and the other documents Citigroup Global Markets Holdings Inc. and Citigroup Inc. have filed with the SEC for more complete information about Citigroup Global Markets Holdings Inc., Citigroup Inc. and this offering. You may obtain these documents without cost by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, you can request these documents by calling toll - free 1 - 800 - 831 - 9146. Filed pursuant to Rule 433 This offering summary does not contain all of the material information an investor should consider before investing in the securities. This offering summary is not for distribution in isolation and must be read together with the accompanying preliminary pricing supplement and the other documents referred to therein, which can be accessed via the link on the first page. Citigroup Global Markets Holdings Inc. Guaranteed by Citigroup Inc.