SEC Form FWP filed by Citigroup Inc.

Hypothetical Underlying Return on Interim Valuation Date

Hypothetical Payment for Interim Valuation Date

Hypothetical Redemption^***

100.00%

$1,032.875^****

Redeemed

50.00%

$1,032.875^****

Redeemed

25.00%

$1,032.875^****

Redeemed

0.00%

$1,032.875^****

Redeemed

-0.01%

$32.875^****

Securities not redeemed

-25.00%

$32.875^****

Securities not redeemed

-40.00%

$32.875^****

Securities not redeemed

-40.01%

$0.00

Securities not redeemed

-50.00%

$0.00

Securities not redeemed

-75.00%

$0.00

Securities not redeemed

-100.00%

$0.00

Securities not redeemed

Hypothetical Underlying Return on Final Valuation Date

Hypothetical Payment at Maturity

100.00%

$1,000.00

50.00%

$1,000.00

25.00%

$1,000.00

0.00%

$1,000.00

-25.00%

$1,000.00

-40.00%

$1,000.00

-40.01%

$599.90

-50.00%

$500.00

-75.00%

$250.00

-100.00%

$0.00

Issuer:

Citigroup Global Markets Holdings Inc.

Guarantor:

Citigroup Inc.

Underlying:

Advanced Micro Devices, Inc. (ticker: “AMD”)

Pricing date:

January 28, 2026

Valuation dates:

Quarterly

Maturity date:

January 31, 2029

Contingent coupon:

At least 13.15% per annum*, paid quarterly only if the closing value of the underlying is greater than or equal to the coupon barrier value on the related valuation date. You are not assured of receiving any contingent coupon. If the closing value on one or more valuation dates is less than its coupon barrier value and, on a subsequent valuation date, the closing value of the underlying on that subsequent valuation date is greater than or equal to its coupon barrier value, your contingent coupon payment for that subsequent valuation date will include all previously unpaid contingent coupon payments

Coupon barrier value:

60.00% of the initial underlying value

Final barrier value:

60.00% of the initial underlying value

Automatic early redemption:

If on any autocall date the closing value of the underlying is greater than or equal to the initial underlying value, the securities will be automatically called for an amount equal to the principal plus the related contingent coupon

Autocall dates:

Quarterly on valuation dates beginning after six months

CUSIP / ISIN:

17332TQB8 / US17332TQB88

Initial underlying value:

The closing value on the pricing date

Final underlying value:

The closing value on the final valuation date

Underlying return:

(Current closing value - initial underlying value) / initial underlying value

Payment at maturity (if not autocalled):

•If the final underlying value is greater than or equal to the final barrier value: $1,000

•If the final underlying value is less than the final barrier value: $1,000 + ($1,000 × the underlying return)

If the securities are not automatically redeemed prior to maturity and the final underlying value is less than the final barrier value, you will receive significantly less than the stated principal amount of your securities, and possibly nothing, at maturity, and you will not receive any contingent coupon payment at maturity (including any previously unpaid contingent coupon payments).

All payments on the securities are subject to the credit risk of Citigroup Global Markets Holdings Inc. and Citigroup Inc.

Stated principal amount:

$1,000 per security

Preliminary pricing supplement:

Preliminary Pricing Supplement dated January 15, 2026

Additional Information

Citigroup Global Markets Holdings Inc. and Citigroup Inc. have filed registration statements (including the accompanying preliminary pricing supplement, product 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, prospectus supplement and prospectus in those registration statements (File Nos. 333-270327 and 333-270327-01) 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.

Selected Risk Considerations

•You may lose a significant portion 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 underlying value. If the final underlying value is less than the final barrier value, you will lose 1% of the stated principal amount of your securities for every 1% by which the underlying has declined from the initial underlying value. There is no minimum payment at maturity on the securities, and you may lose up to all of your investment.

•You will not receive any contingent coupon following any valuation date on which the closing value of the underlying on that valuation date is less than the coupon barrier value. You will only receive a contingent coupon payment that has not been paid on a subsequent contingent coupon payment date if and only if the closing value of the underlying on the related valuation date is greater than or equal to the coupon barrier value.

•The securities may be automatically redeemed prior to maturity, limiting your opportunity to receive contingent coupons if the underlying performs in a way that would otherwise be favorable.

•The securities offer downside exposure, but no upside exposure, to the underlying.

•The securities are particularly sensitive to the volatility of the closing value of the underlying on or near the valuation dates.

•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 will be 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 issuer and its affiliates may have conflicts of interest with you.

•The U.S. federal tax consequences of an investment in the securities are unclear.

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.