Prospectus Filed Pursuant to Rule 424(b)(2) (424b2)

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, 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 DECEMBER 16, 2021

Citigroup Global Markets Holdings Inc.

December , 2021

Medium-Term Senior Notes, Series N

Pricing Supplement No. 2021-USNCH[ ]

Filed Pursuant to Rule 424(b)(2)

Registration Statement Nos. 333-255302 and 333-255302-03

Barrier Securities Linked to the Worst Performing of the MSCI World Information Technology Index, the PHLX Semiconductor Sector Index^SM and the Russell 1000^® Growth Index Due June 23, 2025

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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 and do not repay a fixed amount of principal at maturity. Instead, the securities offer a payment at maturity that may be greater than, equal to or less than the stated principal amount, depending on the performance of the worst performing of the underlyings specified below from its initial underlying value to its final underlying value.

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The securities offer modified exposure to the performance of the worst performing underlying, with (i) the opportunity to participate in any appreciation of the worst performing underlying at the upside participation rate specified below and (ii) contingent repayment of the stated principal amount at maturity if the worst performing underlying depreciates, but only so long as its final underlying value is greater than or equal to its final barrier value specified below. In exchange for these features, investors in the securities must be willing to forgo any dividends with respect to any underlying. In addition, investors in the securities must be willing to accept full downside exposure to the depreciation of the worst performing underlying if its final underlying value is less than its final barrier value. If the final underlying value of the worst performing underlying is less than its final barrier value, you will lose 1% of the stated principal amount of your securities for every 1% by which its final underlying value is less than its initial underlying value. You may lose your entire investment in the securities.

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You will be subject to risks associated with each of the underlyings and will be negatively affected by adverse movements in any one of the underlyings.

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In order to obtain the modified exposure to the worst performing underlying that the securities provide, investors must be willing to accept (i) an investment that may have limited or no liquidity and (ii) the risk of not receiving any amount 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.

Underlyings:	Underlying	Initial underlying value^*	Final barrier value^**
	MSCI World Information Technology Index
	PHLX Semiconductor Sector Index^SM
	Russell 1000^® Growth Index

	^For each underlying, its closing value on the pricing date ^*For each underlying, 80.00% of its initial underlying value
Stated principal amount:	$1,000 per security
Pricing date:	December 17, 2021
Issue date:	December 22, 2021
Valuation date:	June 17, 2025, subject to postponement if such date is not a scheduled trading day or certain market disruption events occur
Maturity date:	June 23, 2025
Payment at maturity:	You will receive at maturity for each security you then hold: § If the final underlying value of the worst performing underlying is greater than its initial underlying value: $1,000 + the return amount § If the final underlying value of the worst performing underlying is less than or equal to its initial underlying value but greater than or equal to its final barrier value: $1,000 § If the final underlying value of the worst performing underlying is less than its final barrier value: $1,000 + ($1,000 × the underlying return of the worst performing underlying) If the final underlying value of the worst performing underlying is less than its final barrier value, you will receive significantly less than the stated principal amount of your securities, and possibly nothing, at maturity.
Final underlying value:	For each underlying, its closing value on the valuation date
Return amount:	$1,000 × the underlying return of the worst performing underlying × the upside participation rate
Upside participation rate:	At least 139.00%. The actual upside participation rate will be determined on the pricing date.
Worst performing underlying:	The underlying with the lowest underlying return
Underlying return:	For each underlying, (i) its final underlying value minus its initial underlying value, divided by (ii) its initial underlying value
Listing:	The securities will not be listed on any securities exchange
CUSIP / ISIN:	17329UVX6 / US17329UVX61
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
Per security:	$1,000.00	$37.50	$962.50
Total:	$	$	$

(1) Citigroup Global Markets Holdings Inc. currently expects that the estimated value of the securities on the pricing date will be at least $877.00 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) 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.

Investing in the securities involves risks not associated with an investment in conventional debt securities. See “Summary Risk Factors” beginning on page PS-5.

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, 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, prospectus supplement and prospectus, which can be accessed via the hyperlinks below:

Product Supplement No. EA-02-09 dated May 11, 2021 Prospectus Supplement and Prospectus each dated May 11, 2021

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.

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. It is important that you read the accompanying product 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.

Multiple Exchange Index. The MSCI World Information Technology Index is a multiple exchange index for purposes of the section “Description of the Securities—Certain Additional Terms for Securities Linked to an Underlying Index—Definitions of Market Disruption Event and Scheduled Trading Day and Related Definitions—Certain Alternative Definitions for Multiple Exchange Indices” in the accompanying product supplement.

Payout Diagram

The diagram below illustrates your payment at maturity for a range of hypothetical underlying returns of the worst performing underlying. The diagram assumes that the upside participation rate will be set at the lowest value indicated on the cover page of this pricing supplement. The actual upside participation rate will be determined on the pricing date.

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.

Payout Diagram

n The Securities	n The Worst Performing Underlying

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Citigroup Global Markets Holdings Inc.

Hypothetical Examples

The examples below illustrate how to determine the payment at maturity on the securities, assuming the various hypothetical final underlying values indicated below. 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 underlying value of the worst performing underlying.

The examples below are based on the following hypothetical values and do not reflect the actual initial underlying values or final barrier values of the underlyings. For the actual initial underlying value and final barrier 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 and final barrier value of each underlying, and not the hypothetical values indicated below. For ease of analysis, figures below have been rounded.The examples below assume that the upside participation rate will be set at the lowest value indicated on the cover page of this pricing supplement. The actual upside participation rate will be determined on the pricing date.

Underlying	Hypothetical initial underlying value	Hypothetical final barrier value
MSCI World Information Technology Index	100.00	80.00 (80.00% of its hypothetical initial underlying value)
PHLX Semiconductor Sector Index^SM	100.00	80.00 (80.00% of its hypothetical initial underlying value)
Russell 1000^® Growth Index	100.00	80.00 (80.00% of its hypothetical initial underlying value)

Example 1—Upside Scenario. The final underlying value of the worst performing underlying is 105.00, resulting in a 5.00% underlying return for the worst performing underlying. In this example, the final underlying value of the worst performing underlying is greater than its initial underlying value.

Underlying	Hypothetical final underlying value	Hypothetical underlying return
MSCI World Information Technology Index*	105.00	5.00%
PHLX Semiconductor Sector Index^SM	120.00	20.00%
Russell 1000^® Growth Index	130.00	30.00%

* Worst performing underlying

Payment at maturity per security = $1,000 + the return amount

= $1,000 + ($1,000 × the underlying return of the worst performing underlying × the upside participation rate)

= $1,000 + ($1,000 × 5.00% × 139.00%)

= $1,000 + $69.50

= $1,069.50

In this scenario, the worst performing underlying has appreciated from its initial underlying value to its final underlying value, and your total return at maturity would equal the underlying return of the worst performing underlying multiplied by the upside participation rate.

Example 2—Par Scenario. The final underlying value of the worst performing underlying is 95.00, resulting in a -5.00% underlying return for the worst performing underlying. In this example, the final underlying value of the worst performing underlying is less than its initial underlying value but greater than its final barrier value.

Underlying	Hypothetical final underlying value	Hypothetical underlying return
MSCI World Information Technology Index	110.00	10.00%
PHLX Semiconductor Sector Index^SM*	95.00	-5.00%
Russell 1000^® Growth Index	110.00	10.00%

* Worst performing underlying

Payment at maturity per security = $1,000

In this scenario, the worst performing underlying has depreciated from its initial underlying value to its final underlying value but not below its final barrier value. As a result, you would be repaid the stated principal amount of your securities at maturity but would not receive any positive return on your investment.

Example 3—Downside Scenario. The final underlying value of the worst performing underlying is 30.00, resulting in a -70.00% underlying return for the worst performing underlying. In this example, the final underlying value of the worst performing underlying is less than its final barrier value.

Underlying	Hypothetical final underlying value	Hypothetical underlying return
MSCI World Information Technology Index	90.00	-10.00%
PHLX Semiconductor Sector Index^SM	105.00	5.00%
Russell 1000^® Growth Index*	30.00	-70.00%

* Worst performing underlying

Payment at maturity per security = $1,000 + ($1,000 × the underlying return of the worst performing underlying)

PS-3

Citigroup Global Markets Holdings Inc.

= $1,000 + ($1,000 × -70.00%)

= $1,000 + -$700.00

= $300.00

In this scenario, the worst performing underlying has depreciated from its initial underlying value to its final underlying value and its final underlying value is less than its final barrier 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 worst performing underlying.

PS-4

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 each underlying. 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 a significant portion or all of your investment. Unlike conventional debt securities, the securities do not repay a fixed amount of principal at maturity. Instead, your payment at maturity will depend on the performance of the worst performing underlying. If the final underlying value of the worst performing underlying is less than its final barrier value, you will lose 1% of the stated principal amount of your securities for every 1% by which the worst performing underlying has depreciated from its initial underlying value to its final underlying value. There is no minimum payment at maturity on the securities, and you may lose up to all of your investment.

The securities do not pay interest. Unlike conventional debt securities, the securities do not pay interest or any other amounts prior to maturity. You should not invest in the securities if you seek current income during the term of the securities.

The securities are subject to heightened risk because they have multiple underlyings. The securities are more risky than similar investments that may be available with only one underlying. With multiple underlyings, there is a greater chance that any one underlying will perform poorly, adversely affecting your return on the securities.

The securities are subject to the risks of each of the underlyings and will be negatively affected if any one underlying performs poorly. You are subject to risks associated with each of the underlyings. If any one underlying performs poorly, you will be negatively affected. The securities are not linked to a basket composed of the underlyings, where the blended performance of the underlyings would be better than the performance of the worst performing underlying alone. Instead, you are subject to the full risks of whichever of the underlyings is the worst performing underlying.

You will not benefit in any way from the performance of any better performing underlying. The return on the securities depends solely on the performance of the worst performing underlying, and 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. It is preferable from your perspective for the underlyings to be correlated with each other, in the sense that their closing values tend to increase or decrease at similar times and by similar magnitudes. By investing in the securities, you assume the risk that the underlyings will not exhibit this relationship. The less correlated the underlyings, the more likely it is that any one of the underlyings will perform poorly over the term of the securities. All that is necessary for the securities to perform poorly is for one of the underlyings to perform poorly. It is impossible to predict what the relationship between the underlyings will be over the term of the securities. The underlyings differ in significant ways and, therefore, may not be correlated with each other.

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.

Your payment at maturity depends on the closing value of the worst performing underlying on a single day. Because your payment at maturity depends on the closing value of the worst performing underlying solely on the valuation date, you are subject to the risk that the closing value of the worst performing underlying on that day may be lower, and possibly significantly lower, than on one or more other dates during the term of the securities. If you had invested in another instrument linked to the worst performing underlying that you could sell for full value at a time selected by you, or if the payment at maturity were based on an average of closing values of the worst performing underlying, you might have achieved better returns.

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 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.

PS-5

Citigroup Global Markets Holdings Inc.

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, and correlation between, the closing values of the underlyings, 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, 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 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 PHLX Semiconductor Sector Index^SM is subject to risks associated with investments concentrated in the semiconductor sector. All or substantially all of the equity securities included in the PHLX Semiconductor Sector Index^SM are issued by companies whose primary line of business is directly associated with the design, distribution, manufacture and sale of semiconductors. The values of companies that are involved in the semiconductor industry are particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation, changes in the prices and availability of raw materials and competition in the semiconductor industry, both domestically and internationally, including competition from foreign competitors with potentially lower productions costs. Such companies may also be heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, such companies may face competition for the services of, and difficulties in employing and retaining, qualified personnel. All of these factors could have an adverse effect on the performance of the PHLX Semiconductor Sector Index^SM and, therefore, on the value of the securities.

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Citigroup Global Markets Holdings Inc.

The MSCI World Information Technology Index is subject to risks associated with investments concentrated in the information technology sector. All or substantially all of the equity securities included in the MSCI World Information Technology Index are issued by companies whose primary line of business is directly associated with the information technology sector. The values of companies that are involved in the information technology sector are particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation, changes in the prices and availability of raw materials and competition in the information technology industry, both domestically and internationally, including competition from foreign competitors with potentially lower productions costs. Such companies may also be heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, such companies may face competition for the services of, and difficulties in employing and retaining, qualified personnel. All of these factors could have an adverse effect on the performance of the MSCI World Information Technology Index and, therefore, on the value of the securities.

The MSCI World Information Technology Index is subject to risks associated with non-U.S. 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.

Fluctuations in exchange rates will affect the closing value of the MSCI World Information Technology Index. Because the MSCI World Information Technology Index includes stocks that trade outside the United States and the closing value of the MSCI World Information Technology Index is based on the U.S. dollar value of those stocks, the MSCI World Information Technology Index is subject to currency exchange rate risk with respect to each of the currencies 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 currencies in which the stocks included in the MSCI World Information Technology Index trade, the closing value of the MSCI World Information Technology Index will be adversely affected for that reason alone.

The investment strategy represented by the Russell 1000^® Growth Index may not be successful. The Russell 1000^® Growth Index is designed to measure the full performance of companies included in the Russell 1000^® Index that exhibit relatively strong growth characteristics and relatively weak value characteristics and a portion of the performance of companies with more balanced growth and value characteristics. There is, however, no assurance that the Russell 1000^® Growth Index will outperform any other index or strategy that tracks U.S. stocks selected using other criteria. A “growth” investment strategy is premised on the goal of investing in stocks of companies with relatively higher price-to-book ratios, higher I/B/E/S forecast medium term (2 year) growth and higher sales per share historical growth (5 years) on the assumption that the value of those stocks will increase over time as these companies grow more rapidly than the broader market. However, the growth characteristics referenced by the Russell 1000^® Growth Index may not be accurate predictors of future growth, and there is no guarantee that these stocks will appreciate. In addition, the Russell 1000^® Growth Index’s selection methodology includes a bias toward stocks that have higher prices, and if these stocks prove to be overvalued, they may underperform the broader market. It is possible that the stock selection methodology of the Russell 1000^® Growth Index will adversely affect its return and, consequently, the level of the Russell 1000^® Growth Index and the value of your securities.

Our offering of the securities is not a recommendation of any underlying. The fact that we are offering the securities does not mean that we believe that investing in an instrument linked to 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 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

PS-7

Citigroup Global Markets Holdings Inc.

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.

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. 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.

PS-8

Citigroup Global Markets Holdings Inc.

Information About the MSCI World Information Technology Index

Please refer to Annex A to this pricing supplement for additional information.

Historical Information

The closing value of the MSCI World Information Technology Index on December 15, 2021 was 569.9734.

The graph below shows the closing value of the MSCI World Information Technology Index for each day such value was available from January 3, 2011 to December 15, 2021. 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.

MSCI World Information Technology Index – Historical Closing Values
January 3, 2011 to December 15, 2021

PS-9

Citigroup Global Markets Holdings Inc.

Information About the PHLX Semiconductor Sector Index^SM

The PHLX Semiconductor Sector Index^SM is a modified market capitalization-weighted index designed to measure the performance of the 30 largest US-listed semiconductor companies.

Please refer to Annex B to this pricing supplement for additional information.

Historical Information

The closing value of the PHLX Semiconductor Sector Index^SM on December 15, 2021 was 3,934.458.

The graph below shows the closing value of the PHLX Semiconductor Sector Index^SM for each day such value was available from January 3, 2011 to December 15, 2021. 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.

PHLX Semiconductor Sector Index^SM – Historical Closing Values
January 3, 2011 to December 15, 2021

PS-10

Citigroup Global Markets Holdings Inc.

Information About the Russell 1000^® Growth Index

The Russell 1000^® Growth Index aims to measure the performance of the large-cap growth segment of the U.S. equity universe.

Please refer to Annex C to this pricing supplement for additional information.

Historical Information

The closing value of the Russell 1000^® Growth Index on December 15, 2021 was 3,057.635.

The graph below shows the closing value of the Russell 1000^® Growth Index for each day such value was available from January 3, 2011 to December 15, 2021. 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.

Russell 1000^® Growth Index – Historical Closing Values
January 3, 2011 to December 15, 2021

PS-11

Citigroup Global Markets Holdings Inc.

United States Federal Tax Considerations

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 capital gain or loss equal to the difference between the amount realized and your tax basis in the security. Such gain or loss should be long-term capital gain or loss if you held the security for more than one year.

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, 2023 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.

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 $37.50 for each security sold in this offering. From this underwriting fee, CGMI will pay selected dealers not affiliated with CGMI a fixed selling concession of $37.50 for each security they sell.

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.

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Citigroup Global Markets Holdings Inc.

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 six 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 six-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.”

© 2021 Citigroup Global Markets Inc. All rights reserved. Citi and Citi and Arc Design are trademarks and service marks of Citigroup Inc. or its affiliates and are used and registered throughout the world.

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Citigroup Global Markets Holdings Inc.

Annex A
Description of the MSCI World Information Technology Index

The MSCI World Information Technology Index is calculated, maintained and published by MSCI, Inc. All information contained in this pricing supplement regarding the MSCI World Information Technology Index has been derived from information provided by MSCI, Inc., without independent verification. This information reflects the policies of, and is subject to change by, MSCI, Inc. MSCI, Inc. has no obligation to continue to publish, and may discontinue publication of, the MSCI World Information Technology Index. The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. MSCI, Inc. is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

The MSCI World Information Technology Index is a free float-adjusted market capitalization index designed to measure the equity market performance of the Global Industry Classification Standard (“GICS^®”) information technology sector in large- and mid-cap segments in certain developed markets. The MSCI World Information Technology Index currently consists of the following 23 developed equity markets: Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland, the United Kingdom and the United States. The MSCI World Information Technology Index covers approximately 85% of the free float-adjusted market capitalization of the information technology sector in each country.

The MSCI World Information Technology Index is calculated in U.S. dollars and is reported by Bloomberg L.P. under the ticker symbol “MXWO0IT.”

MSCI World Information Technology Index Composition and Maintenance

The MSCI World Information Technology Index is one of the MSCI Global Investable Market Indices. The MSCI Global Investable Market Indices are constructed and maintained at an individual market level. MSCI undertakes an index construction process that involves: (i) defining the Equity Universe for each market; (ii) determining the Market Investable Equity Universe for each market; (iii) determining market capitalization size-segments for each market; and (iv) applying index continuity rules.

Defining the Equity Universe

(i)

Identifying Eligible Equity Securities: All listed equity securities, including real estate investment trusts and certain income trusts listed in Canada, are eligible for inclusion in the Equity Universe. Limited partnerships, limited liability companies and business trusts, which are listed in the United States and are not structured to be taxed as limited partnerships, are likewise eligible for inclusion in the Equity Universe. Conversely, mutual funds, exchange-traded funds, equity derivatives and most investment trusts are not eligible for inclusion in the Equity Universe. Preferred shares that exhibit characteristics of equity securities are eligible. Stapled securities are considered eligible if each of the underlying components exhibit characteristics of equity securities.

(ii)

Country Classification of Eligible Securities: The Equity Universe initially looks at securities listed in any of the countries in the MSCI Global Index Series, which will be classified as Developed Markets (“DM”), Emerging Markets (“EM”) or Frontier Markets (“FM”). Each company and its securities (i.e., share classes) are classified in one and only one country, which allows for a distinctive sorting of each company by its respective country. The MSCI World Information Technology Index only includes securities listed in the 23 Developed Markets listed above.

Determining the Market Investable Equity Universe

The Market Investable Equity Universe for a market is derived by (i) identifying eligible listings for each security in the Equity Universe; and (ii) applying investability screens to individual companies and securities in the Equity Universe that are classified in that market. A market is equivalent to a single country, except in DM Europe, where all DM countries in Europe are aggregated into a single market for index construction purposes. Subsequently, individual DM Europe country indices within the MSCI Europe Index are derived from the constituents of the MSCI Europe Index under the Global Investable Market Indices methodology.

(i)

Identifying Eligible Listings: A security may have a listing that trades in the country where it is classified (i.e., a “local listing”) and/or a listing that trades in a different country (i.e., a “foreign listing”). A security may be represented by either a local listing or a foreign listing (including a Depositary Receipt) in the Global Investable Equity Universe as determined by MSCI.

(ii)

Applying Investability Screens: Some of the investability requirements are applied at the individual security level and some at the overall company level, represented by the aggregation of individual securities of the company. As such, the inclusion or exclusion of one security does not imply the automatic inclusion or exclusion of other securities of the same company.

The investability screens used to determine the Investable Equity Universe in each market are as follows:

(a)

Equity Universe Minimum Size Requirement: This investability screen is applied at the company level. In order to be included in a Market Investable Equity Universe, a company must have the required minimum full market capitalization. A company will meet this requirement if its cumulative free float-adjusted market capitalization is within the top 99% of the Equity Universe sorted in descending order by full market capitalization.

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Citigroup Global Markets Holdings Inc.

(b)

Equity Universe Minimum Float-Adjusted Market Capitalization Requirement: This investability screen is applied at the individual security level. To be eligible for inclusion in a Market Investable Equity Universe, a security must have a free float-adjusted market capitalization equal to or higher than 50% of the Equity Universe Minimum Size Requirement.

(c)

Minimum Liquidity Requirement: This investability screen is applied at the individual security level. To be eligible for inclusion in a Market Investable Equity Universe, a security must have adequate liquidity as measured by the Annualized Traded Value Ratio (“ATVR”) and the Frequency of Trading. In addition to the ATVR and Frequency of Trading requirements.

Only one listing per security may be included in the Market Investable Equity Universe. In instances when a security has two or more eligible listings that meet the above liquidity requirements, then the following priority rules are used to determine which listing will be used for potential inclusion of the security in the Market Investable Equity Universe: (i) local listing; (ii) foreign listing in the same geographical region; and (iii) foreign listing in a different geographical region.

(d)

Global Minimum Foreign Inclusion Factor Requirement: This investability screen is applied at the individual security level. To be eligible for inclusion in a Market Investable Equity Universe, a security’s Foreign Inclusion Factor (“FIF”) must reach a certain threshold. The FIF of a security is defined as the proportion of shares outstanding that is available for purchase in the public equity markets by international investors. This proportion accounts for the available free float of and/or the foreign ownership limits applicable to a specific security (or company). In general, a security must have an FIF equal to or larger than 0.15 to be eligible for inclusion in a Market Investable Equity Universe. Exceptions to this general rule are made only in the limited cases where the exclusion of securities of a very large company would compromise the Standard Index’s ability to fully and fairly represent the characteristics of the underlying market.

(e)

Minimum Length of Trading Requirement: This investability screen is applied at the individual security level. For an initial public offering (“IPO”) to be eligible for inclusion in a Market Investable Equity Universe, the new issue must have started trading at least three months before the implementation of a semi-annual index review. This requirement is applicable to small new issues in all markets. Large IPOs and large primary / secondary offerings of non-index constituents are not subject to the Minimum Length of Trading Requirement and may be included in a Market Investable Equity Universe and the Standard Index outside of a quarterly or semi-annual index review.

(f)

Minimum Foreign Room Requirement: This investability screen is applied at the individual security level. For a security that is subject to a Foreign Ownership Limit (“FOL”) to be eligible for inclusion in a Market Investable Equity Universe, the proportion of shares still available to foreign investors relative to the maximum allowed (referred to as “foreign room”) must be at least 15%.

(g)

Financial Reporting Requirement. This investability screen is applied at the company level. Companies classified in the United States must file a Form 10-K/10-Q to be eligible for inclusion in the USA Investable Equity Universe.

Defining Market Capitalization Size Segment for Each Market

Once a Market Investable Equity Universe is defined, it is segmented into the following size-based indices, with the following free float-adjusted market capitalization market coverage target ranges:

(i) Investable Market Index (Large + Mid + Small): 99%+1% or -0.5%

(ii) Standard Index (Large + Mid): 85% ± 5%

(iii) Large Cap Index: 70% ± 5%

(iv) Mid Cap Index: The Mid Cap Index market coverage in each market is derived as the difference between the market coverage of the Standard Index and the Large Cap Index in that market.

(v) Small Cap Index: The Small Cap Index market coverage in each market is derived as the difference between the free float-adjusted market capitalization coverage of the Investable Market Index and the Standard Index in that market.

The MSCI World Information Technology Index is a Standard Index, as it includes large- and mid-size companies.

Index Continuity Rules

In order to achieve index continuity, as well as provide some basic level of diversification, notwithstanding the effect of other index construction rules, a minimum number of five constituents will be maintained. If after the application of the index construction methodology, the MSCI World Information Technology Index contains fewer than five securities, then the largest securities by free float-adjusted market capitalization among the securities included in the Market Investable Equity Universe are added to the index in order to reach five constituents. At subsequent index reviews, if after the application of the index maintenance methodology the index contains less than five securities, then the remaining securities are selected for inclusion by multiplying market capitalization of such securities by a factor of 1.5.

GICS Sector of the MSCI World Information Technology Index

All companies in the Market Global Investable Equity Universe are assigned to the industry that best describes their business activities based on the GICS^®. Companies are eligible for inclusion in the MSCI World Information Technology Index if they are assigned to the information

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Citigroup Global Markets Holdings Inc.

technology category, which currently includes companies in the following industries: IT services; software; communications equipment; technology hardware, storage & peripherals; electronic equipment, instruments and components; and semiconductors and semiconductor equipment.

Maintenance of the MSCI Global Investable Market Indices

The MSCI Global Investable Market Indices are maintained with the objective of reflecting the evolution of the underlying equity markets and segments on a timely basis, while seeking to achieve index continuity, continuous investability of constituents and replicability of the indices, and index stability and low index turnover.

In particular, index maintenance involves semi-annual index reviews in May and November and quarterly index reviews in February and August of the Size-Segment Indices. Semi-annual index review includes updating the indices on the basis of a fully refreshed Equity Universe; taking buffer rules into consideration for migration of securities across size and style segments; and updating FIFs and Number of Shares (“NOS”). Quarterly index review includes adding significant new eligible securities (such as IPOs that were not eligible for earlier inclusion) in the index; allowing for significant moves of companies within the Size-Segment Indices, using wider buffers than in the semi-annual index reviews; and reflecting the impact of significant market events on FIFs and updating NOS.

In addition, ongoing event-related changes to the indices are made as the result of mergers, acquisitions, spin-offs, bankruptcies, reorganizations and other similar corporate events. They can also result from capital reorganizations in the form of rights issues, bonus issues, public placements and other similar corporate actions that take place on a continuing basis. These changes are reflected in the indices at the time of the event. Significantly large IPOs are included in the indices after the close of the company’s tenth day of trading.

Index Calculation

The MSCI World Information Technology Index is calculated using the Laspeyres’ concept of a weighted arithmetic average together with the concept of chain-linking. As a general principle, today’s index level is obtained by applying the change in the market performance to the previous period index level.

License Agreement

MSCI and Citigroup Global Markets Inc. have entered into a non-exclusive license agreement providing for the license to Citigroup Global Markets Inc. and certain of its affiliates, in exchange for a fee, of the right to use the MSCI Indices in connection with certain securities, including the securities.

The MSCI World Information Technology Index is the exclusive property of MSCI. MSCI and the MSCI Index names are service mark(s) of MSCI or its affiliates and have been licensed for use for certain purposes by Citigroup Global Markets Inc. and certain of its affiliates. The securities referred to herein are not sponsored, endorsed, or promoted by MSCI, and MSCI bears no liability with respect to any such securities.

THIS FINANCIAL PRODUCT IS NOT SPONSORED, ENDORSED, SOLD OR PROMOTED BY MSCI INC. (“MSCI”), ANY AFFILIATE OF MSCI OR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index. the MSCI World Information Technology Index is THE EXCLUSIVE PROPERTY OF MSCI. MSCI AND THE the MSCI World Information Technology Index ARE SERVICE MARK(S) OF MSCI OR ITS AFFILIATES AND HAVE BEEN LICENSED FOR USE FOR CERTAIN PURPOSES BY CITIGROUP GLOBAL MARKETS INC. AND ITS AFFILIATES (THE “LICENSEE”). NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index MAKES ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, TO THE OWNERS OF THIS FINANCIAL PRODUCT OR ANY MEMBER OF THE PUBLIC REGARDING THE ADVISABILITY OF INVESTING IN FINANCIAL SECURITIES GENERALLY OR IN THIS FINANCIAL PRODUCT PARTICULARLY OR THE ABILITY OF the MSCI World Information Technology Index TO TRACK CORRESPONDING STOCK MARKET PERFORMANCE. MSCI OR ITS AFFILIATES ARE THE LICENSORS OF CERTAIN TRADEMARKS, SERVICE MARKS AND TRADE NAMES AND OF THE the MSCI World Information Technology Index WHICH ARE DETERMINED, COMPOSED AND CALCULATED BY MSCI WITHOUT REGARD TO THIS FINANCIAL PRODUCT OR THE ISSUER OR OWNER OF THIS FINANCIAL PRODUCT. NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index HAS ANY OBLIGATION TO TAKE THE NEEDS OF THE ISSUERS OR OWNERS OF THIS FINANCIAL PRODUCT INTO CONSIDERATION IN DETERMINING, COMPOSING OR CALCULATING THE the MSCI World Information Technology Index. NEITHER MSCI, ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index IS RESPONSIBLE FOR OR HAS PARTICIPATED IN THE DETERMINATION OF THE TIMING OF, PRICES AT, OR QUANTITIES OF THIS FINANCIAL PRODUCT TO BE ISSUED OR IN THE DETERMINATION OR CALCULATION OF THE EQUATION BY WHICH THIS FINANCIAL PRODUCT IS REDEEMABLE FOR CASH. NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, THE MAKING OR COMPILING the MSCI World Information Technology Index HAS ANY OBLIGATION OR LIABILITY TO THE OWNERS OF THIS FINANCIAL PRODUCT IN CONNECTION WITH THE ADMINISTRATION, MARKETING OR OFFERING OF THIS FINANCIAL PRODUCT.

ALTHOUGH MSCI SHALL OBTAIN INFORMATION FOR INCLUSION IN OR FOR USE IN THE CALCULATION OF the MSCI World Information Technology Index FROM SOURCES WHICH MSCI CONSIDERS RELIABLE, NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO MAKING OR COMPILING the MSCI World Information Technology Index WARRANTS OR GUARANTEES THE ORIGINALITY, ACCURACY AND/OR THE COMPLETENESS OF the MSCI World Information Technology Index OR ANY DATA INCLUDED THEREIN. NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index MAKES ANY

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Citigroup Global Markets Holdings Inc.

WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY LICENSEE, LICENSEE’S CUSTOMERS OR COUNTERPARTIES, ISSUERS OF THE FINANCIAL SECURITIES, OWNERS OF THE FINANCIAL SECURITIES, OR ANY OTHER PERSON OR ENTITY, FROM THE USE OF the MSCI World Information Technology Index OR ANY DATA INCLUDED THEREIN IN CONNECTION WITH THE RIGHTS LICENSED HEREUNDER OR FOR ANY OTHER USE. NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index SHALL HAVE ANY LIABILITY FOR ANY ERRORS, OMISSIONS OR INTERRUPTIONS OF OR IN CONNECTION WITH the MSCI World Information Technology Index OR ANY DATA INCLUDED THEREIN. FURTHER, NEITHER MSCI, ANY OF ITS AFFILIATES NOR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index MAKES ANY EXPRESS OR IMPLIED WARRANTIES OF ANY KIND, AND MSCI, ANY OF ITS AFFILIATES AND ANY OTHER PARTY INVOLVED IN, OR RELATED TO MAKING OR COMPILING the MSCI World Information Technology Index HEREBY EXPRESSLY DISCLAIM ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO the MSCI World Information Technology Index AND ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL MSCI, ANY OF ITS AFFILIATES OR ANY OTHER PARTY INVOLVED IN, OR RELATED TO, MAKING OR COMPILING the MSCI World Information Technology Index HAVE ANY LIABILITY FOR ANY DIRECT, INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL OR ANY OTHER DAMAGES (INCLUDING LOST PROFITS) EVEN IF NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.

No purchaser, seller or holder of this security, or any other person or entity, should use or refer to any MSCI trade name, trademark or service mark to sponsor, endorse, market or promote this product without first contacting MSCI to determine whether MSCI’s permission is required. Under no circumstances may any person or entity claim any affiliation with MSCI without the prior written permission of MSCI.

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Citigroup Global Markets Holdings Inc.

Annex B
Description of the PHLX Semiconductor Sector Index^SM

The PHLX Semiconductor Sector^SM Index was developed by the predecessor to Nasdaq PHLX and is calculated, maintained and published by Nasdaq PHLX. All information contained in this pricing supplement regarding the PHLX Semiconductor Sector Index^SM has been derived from information provided by Nasdaq, Inc., without independent verification. This information reflects the policies of, and is subject to change by, Nasdaq, Inc. Nasdaq, Inc. has no obligation to continue to publish, and may discontinue publication of, the PHLX Semiconductor Sector Index^SM. The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. Nasdaq, Inc. is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

The PHLX Semiconductor Sector Index^SM is a modified capitalization-weighted index designed to measure the performance of the 30 largest US-listed semiconductor companies.

The PHLX Semiconductor Sector^SM Index is reported by Bloomberg L.P. under the ticker symbol “SOX.”

PHLX Semiconductor Sector Index^SM Composition and Maintenance

Eligibility

Index eligibility is limited to specific security types only. The security types eligible for the PHLX Semiconductor Sector^SM Index include common stocks, ordinary shares, ADRs, shares of beneficial interest or limited partnership interests. Security types not included in the PHLX Semiconductor Sector^SM Index are closed-end funds, convertible debentures, exchange traded funds, preferred stocks, rights, warrants, units and other derivative securities.

Initial Security Eligibility Criteria

To be eligible for inclusion in the PHLX Semiconductor Sector^SM Index, a security must meet the following criteria: (1) a security must be listed on the Nasdaq Stock Market, the New York Stock Exchange, or NYSE American, or the CBOE Exchange; (2) the issuer of the security must be classified, as reasonably determined by Nasdaq, as a company whose primary business is involved in the design, distribution, manufacture and sale of semiconductors under the Industry Classification Benchmark (“ICB”); (3) only one class of security per issuer is allowed; (4) the security must have a market capitalization of at least $100 million; (5) the security must have traded at least 1.5 million shares in each of the last six months; (6) the security must have listed options on a recognized options market in the U.S. or be eligible for listed-options on a recognized options market in the U.S.; (7) the security may not be issued by an issuer currently in bankruptcy proceedings; (8) the issuer of the security may not have entered into a definitive agreement or other arrangement which would likely result in the security no longer being eligible; and (9) the issuer of the security must have “seasoned” on a recognized market for at least 3 months, not including the month of initial listing.

Index Maintenance

Changes in the price and/or Index Shares driven by corporate events such as stock dividends, stock splits and certain spin-offs and rights issuances are adjusted on the ex-date. If the change in total shares outstanding arising from other corporate actions is greater than or equal to 10%, the change is made as soon as practicable. Otherwise, if the change in total shares outstanding is less than 10%, then all such changes are accumulated and made effective at one time on a quarterly basis after the close of trading on the third Friday in each of March, June, September and December. The Index Shares are derived from the security’s total shares outstanding. Intraquarter, the Index Shares are adjusted by the same percentage amount by which the total shares outstanding have changed. In the case of a special cash dividend, a determination is made on an individual basis whether to make a change to the price of an index component security in accordance with its index dividend policy. If it is determined that a change will be made, it will become effective on the ex-date. Ordinarily, whenever there is a change in Index Shares, a change in an index component security, or a change to the price of an index component security due to spin-offs, rights issuance or special cash dividends, the divisor is adjusted to ensure that there is no discontinuity in the value of the PHLX Semiconductor Sector^SM Index which might otherwise be caused by any such change. All changes are announced in advance and are reflected in the PHLX Semiconductor Sector^SM Index prior to market open on the PHLX Semiconductor Sector^SM Index effective date.

Index Rebalancing

The PHLX Semiconductor Sector^SM Index employs a modified market capitalization-weighting methodology. At each quarter, the PHLX Semiconductor Sector^SM Index is rebalanced such that the maximum weight of any index component security does not exceed 8% and no more than 5 securities are at that cap. The excess weight of any capped security is distributed proportionally across the remaining index component securities. If after redistribution, any of the 5 highest ranked index component securities are weighted below 8%, these securities are not capped. Next, any remaining index component securities in excess of 4% are capped at 4% and the excess weight is redistributed proportionally across the remaining index component securities. The process is repeated, if necessary, to derive the final weights.

The modified market capitalization-weighting methodology is applied to the capitalization of each index component security, using the last sale price of the security at the close of trading on the last trading day in February, May, August and November and after applying quarterly changes to the total shares outstanding. Index Shares are then calculated multiplying the weight of the security derived above by the new market value of the PHLX Semiconductor Sector^SM Index and dividing the modified market capitalization for each index component security by its corresponding Last Sale Price. The changes are effective after trading on the third Friday in March, June, September and December.

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Citigroup Global Markets Holdings Inc.

Index Calculation

The PHLX Semiconductor Sector^SM Index employs a two-stage weight adjustment scheme. Index components’ initial weights are determined by dividing each component’s market capitalization by the aggregate market capitalizations of all index components.

Stage 1: Initial index weights are adjusted to meet the following Stage 1 constraint, producing the Stage 1 weights:

No Index Security weight may exceed 8%.

Stage 2: Stage 1 weights are adjusted to meet the following Stage 2 constraints, producing the final weights:

For Index Securities with the five largest market capitalizations, Stage 1 weights are maintained.

For all other Index Securities, no weight may exceed 4%

The final weights meet the following constraints:

No Index Security weight may exceed 8% of the index; five may exceed 4%.

If trading in an index component security is halted on its primary listing market, the most recent last sale price is used for all index computations until trading on such market resumes. Likewise, the most recent last sale price is used if trading in a security is halted on its primary listing market before the market is open. The PHLX Semiconductor Sector^SM Index began on December 1, 1993 at a base value of 100.00, as adjusted.

License Agreement

The securities are not sponsored, endorsed, sold or promoted by The Nasdaq Group, Inc. or its affiliates (Nasdaq, with its affiliates, are referred to as the “Corporations”). The Corporations have not passed on the legality or suitability of, or the accuracy or adequacy of descriptions and disclosures relating to, the securities. The Corporations make no representation or warranty, express or implied to the owners of the securities or any member of the public regarding the advisability of investing in securities generally or in the securities particularly, or the ability of the PHLX Semiconductor Sector^SM Index to track general stock market performance. The PHLX Semiconductor Sector^SM Index is determined, composed and calculated by Nasdaq without regard to us or the securities. Nasdaq has no obligation to take our needs or the needs of the owners of the securities into consideration in determining, composing or calculating the PHLX Semiconductor Sector^SM Index. The Corporations are not responsible for and have not participated in the determination of the timing of, prices at, or quantities of the securities to be issued or in the determination or calculation of the equation by which the securities are to be converted into cash. The Corporations have no liability in connection with the administration, marketing or trading of the securities.

Citigroup Global Markets Inc. and its affiliates DO NOT GUARANTEE THE ACCURACY AND/OR UNINTERRUPTED CALCULATION OF THE PHLX SEMICONDUCTOR SECTOR^SM INDEX OR ANY DATA INCLUDED THEREIN. THE CORPORATIONS MAKE NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY CITIGROUP GLOBAL MARKETS INC. OR ITS AFFILIATES, OWNERS OF THE SECURITIES, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE PHLX SEMICONDUCTOR SECTOR^SM INDEX OR ANY DATA INCLUDED THEREIN. THE CORPORATIONS MAKE NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIM ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE PHLX SEMICONDUCTOR SECTOR^SM INDEX OR ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL THE CORPORATIONS HAVE ANY LIABILITY FOR ANY LOST PROFITS OR SPECIAL, INCIDENTAL, PUNITIVE, INDIRECT, OR CONSEQUENTIAL DAMAGES, EVEN IF NOTIFIED OF THE POSSIBILITY OF SUCH DAMAGES.

“Nasdaq^®,” “PHLX Semiconductor Sector^SM” and “SOX^SM” are registered trademarks or service marks of The Nasdaq Group, Inc. (which with its affiliates is referred to as the “Corporations”). The securities have not been passed on by the Corporations as to their legality or suitability. The securities are not issued, endorsed, sold, or promoted by the Corporations. THE CORPORATIONS MAKE NO WARRANTIES AND BEAR NO LIABILITY WITH RESPECT TO THE SECURITIES.

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Citigroup Global Markets Holdings Inc.

Annex C
Description of the Russell 1000^® Growth Index

The Russell 1000^® Growth Index is calculated, published and disseminated by FTSE Russell, a subsidiary of the London Stock Exchange Group plc (“LSE”). All information contained in this pricing supplement regarding the Russell 1000^® Growth Index has been derived from information provided by FTSE Russell, without independent verification. This information reflects the policies of, and is subject to change by, FTSE Russell. FTSE Russell has no obligation to continue to publish, and may discontinue publication of, the Russell 1000^® Growth Index. The securities represent obligations of Citigroup Global Markets Holdings Inc. (guaranteed by Citigroup Inc.) only. FTSE Russell is not involved in any way in this offering and has no obligation relating to the securities or to holders of the securities.

The Russell 1000^® Growth Index aims to measure the performance of the large-cap growth segment of the U.S. equity universe. It includes those Russell 1000^® Index companies with relatively higher price-to-book ratios, higher I/B/E/S forecast medium term (2 year) growth and higher sales per share historical growth (5 years). The Russell 1000^® Index is designed to track the performance of the large-capitalization segment of the U.S. equity market and is composed of the 1,000 largest securities that form the Russell 3000^® Index. The Russell 3000^® Index is composed of the 3,000 largest U.S. companies as determined by market capitalization and represents approximately 98% of the U.S. equity market.

The Russell 1000^® Growth Index is reported by Bloomberg L.P. under the ticker symbol “RLG.”

Russell 1000^® Growth Index Construction and Calculation

Selection of stocks underlying the Russell 1000^® Growth Index.

The Russell 1000^® Growth Index is a sub-group of the Russell 1000^® Index. To be eligible for inclusion in the Russell 1000^® Index, and, consequently, the Russell 1000^® Growth Index, a company’s stocks must be listed on the last trading day in May of a given year and FTSE Russell must have access to documentation verifying the company’s eligibility for inclusion. Beginning September 2004, eligible initial public offerings are added to Russell U.S. Indices at the end of each calendar quarter, based on total market capitalization rankings within the market-adjusted capitalization breaks established during the most recent reconstitution. To be added to any Russell U.S. equity index during a quarter outside of reconstitution, initial public offerings must meet additional eligibility criteria. As of August 2020, to be eligible for inclusion in the Russell 1000^® Growth Index, each company is required to have more than 5% of its voting rights (aggregated across all of its equity securities) held by unrestricted shareholders. Shares referenced as “non-voting” or providing legally minimum rights only will be viewed as having no voting power as it relates to the minimum voting rights review. Companies already included in the Russell 1000^® Growth Index have a grandfathering period to comply with this requirement, or they will be removed from the Russell 1000^® Growth Index in September 2022.

Only companies that are determined to be part of the U.S. equity market are eligible for inclusion in the Russell 1000^® Growth Index. All securities eligible for inclusion must trade on a major U.S. exchange. Bulletin board, pink sheet or over-the-counter traded securities are not eligible for inclusion. Stocks must have a close price at or above $1.00 on their primary exchange or on another major U.S. exchange on the last trading day in May to be considered eligible for inclusion. The following companies are specifically excluded from the Russell 1000^® Growth Index: (i) companies with a total market capitalization less than $30 million; (ii) companies with only a small portion of their shares available in the marketplace; (iii) royalty trusts, limited liability companies, closed-end investment companies (companies that are required to report Acquired Fund Fees and Expenses, as defined by the Securities and Exchange Commission, including business development companies, are not eligible for inclusion), blank check companies, special purpose acquisition companies, limited partnerships, exchange-traded funds and mutual funds. In addition, preferred and convertible preferred stock, redeemable shares, participating preferred stock, warrants, rights and trust receipts are not eligible for inclusion.

FTSE Russell uses a “non-linear probability” method to assign stocks to the growth and value style indices. The term “probability” is used to indicate the degree of certainty that a stock is value or growth based on its relative book-to-price (B/P) ratio, I/B/E/S forecast medium-term growth (2 year) and sales per share historical growth (5 year). This method allows stocks to be represented as having both growth and value characteristics, while preserving the additive nature of the indices.

The process for assigning growth and value weights is applied separately to the stocks in the Russell 1000^® Index. The stocks in the Russell 1000^® Index are ranked by their adjusted book-to-price ratio (B/P), their I/B/E/S forecast medium-term growth (2 year) and sales per share historical growth (5 year). These rankings are converted to standardized units and combined to produce a Composite Value Score (“CVS”). Stocks are then ranked by their CVS, and a probability algorithm is applied to the CVS distribution to assign growth and value weights to each stock. In general, stocks with a lower CVS are considered growth, stocks with a higher CVS are considered value, and stocks with a CVS in the middle range are considered to have both growth and value characteristics, and are weighted proportionately in the growth and value index. Stocks are always fully represented by the combination of their growth and value weights, e.g., a stock that is given a 20% weight in a Russell value index will have an 80% weight in the same Russell growth index.

Stock A, in the figure below, is a security with 20% of its available shares assigned to the value index and the remaining 80% assigned to the growth index. The growth and value probabilities will always sum to 100%. Hence, the sum of a stock’s market capitalization in the growth and value index will always equal its market capitalization in the Russell 1000^® Index.

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In the figure above, the quartile breaks are calculated such that approximately 25% of the available market capitalization lies in each quartile. Stocks at the median are divided 50% in each style index. Stocks below the first quartile are 100% in the growth index. Stocks above the third quartile are 100% in the value index. Stocks falling between the first and third quartile breaks are in both indexes to varying degrees depending on how far they are above or below the median and how close they are to the first or third quartile breaks.

Roughly 70% of the available market capitalization is classified as all growth or all value. The remaining 30% have some portion of their market value in either the value or growth index, depending on their relative distance from the median value score. Note that there is a small position cutoff rule. If a stock’s weight is more than 95% in one style index, its weight is increased to 100% in the index.

In an effort to mitigate unnecessary turnover, FTSE Russell implements a banding methodology at the CVS level of the growth and value style algorithm. If a company’s CVS change from the previous year is greater than or equal to +/- 0.10 and if the company remains in the same base index, then the CVS remains unchanged during the next reconstitution process. Keeping the CVS static for these companies does not mean the probability (growth/value) will remain unchanged in all cases due to the relation of a CVS score to the overall index. However, this banding methodology is intended to reduce turnover caused by smaller, less meaningful movements while continuing to allow the larger, more meaningful changes to occur, signaling a true change in a company’s relation to the market.

In calculating growth and value weights, stocks with missing or negative values for B/P, or missing values for I/B/E/S growth, or missing sales per share historical growth (6 years of quarterly numbers are required), are allocated by using the mean value score of the Russell Global Sectors industry, subsector or sector group into which the company falls. Each missing (or negative B/P) variable is substituted with the industry, subsector or sector group independently. An industry must have five members or the substitution reverts to the subsector, and so forth to the sector. In addition, a weighted value score is calculated for securities with low analyst coverage for I/B/E/S medium-term growth. For securities with coverage by a single analyst, 2/3 of the industry, subsector, or sector group value score is weighted with 1/3 the security’s independent value score. For those securities with coverage by two analysts, 2/3 of the independent security’s value score is used and only 1/3 of the industry, subsector, or sector group is weighted. For those securities with at least three analysts contributing to the I/B/E/S medium-term growth, 100% of the independent security’s value score is used.

The Russell 1000^® Growth Index, along with the Russell 1000^® Index, is reconstituted annually to reflect changes in the marketplace. The list of companies is ranked based on May 31 total market capitalization, with the actual reconstitution effective on the first trading day following the final Friday of June each year. Changes in the constituents are preannounced and subject to change if any corporate activity occurs or if any new information is received prior to release.

Capitalization Adjustments.

The Russell 1000^® Growth Index is a float-adjusted and market-capitalization weighted index. The current Russell 1000^® Growth Index value is calculated by adding the market values of the Russell 1000^® Index’s Component Stocks, which are derived by multiplying the price of each stock by the number of available shares, to arrive at the total market capitalization of the 1,000 stocks. The total market capitalization is then divided by a divisor, which represents the “adjusted” capitalization of the Russell 1000^® Growth Index on the base date of January 1, 1987. To calculate the Russell 1000^® Growth Index, last sale prices will be used for exchange-traded stocks. If a component stock is not open for trading, the most recently traded price for that security will be used in calculating the Russell 1000^® Growth Index. In order to provide continuity for the Russell 1000^® Growth Index’s value, the divisor is adjusted periodically to reflect events including changes in the number of common shares outstanding for Russell 1000 Component Stocks, company additions or deletions, corporate restructurings and other capitalization changes.

Available shares are assumed to be shares available for trading. Exclusion of capitalization held by directors, senior executives and managers of the company is based on information recorded in corporate filings with the Securities and Exchange Commission. Where FTSE Russell determines that a company is being excluded from index membership solely on the basis of the minimum float requirement, FTSE Russell will use the best available information contained in the Securities and Exchange Commission filings to determine the free float.

The following types of shares are considered unavailable and are removed from total market capitalization to arrive at free float or available market capitalization:

ESOP or LESOP shares – Shares held within employee share plans;

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Public company holdings – Shares held by public companies or by non-listed subsidiaries of public companies;

Lock-In clause shares – All Shares where the holders is subject to a lock-in clause are considered unavailable for the duration of the lock-in clause. Free Float changes resulting from the expiry of a lock-in will be implemented at the next quarterly review, subject to the lock-in or incentive expiry date occurring on or prior to the share and float change information cut-off date;

Active participation or strategic holding shares – Shares held by an investor, investment company or an investment fund that is actively participating in the management of a company or is holding shares in a company for strategic reasons as evidenced by specific statements to that effect in publicly available announcements, or has successfully placed a current member to the board of directors of a company;

On-going contractual agreement shares – Shares that are subject to ongoing contractual agreements (such as swaps) where they would ordinarily be treated as restricted are considered unavailable;

Sovereign Wealth Fund shares – Shares held by a Sovereign Wealth Fund are considered unavailable where the Sovereign Wealth Fund’s owns 10% or more of the shares;

Corporate insider shares – Corporate insider shares are defined as those shares held by founders, promoters, former directors, founding venture capital and private equity firms, private companies, and individuals (including employees) and shares held by several investors acting in concert that own 10% or more of the shares outstanding. Portfolio holdings (such as pension fund, insurance fund or investment companies) are generally not considered unavailable. However, where a single portfolio holding is 30% or greater it will be regarded as strategic and therefore unavailable;

Legally restricted shares – Legally restricted shares are defined as shares where the company’s shareholders are subject to legal restrictions, including foreign ownership restrictions, that are more restrictive; and

Government holdings:

Direct government holders – Shares directly owned by State, Regional, Municipal and Local Governments are considered unavailable and will be removed entirely from available shares;

Indirect government holders – shares held by government investment boards and/or investment arms will be treated similar to portfolio holdings and removed if the holding is greater than 30%; and

Government pensions – holdings by independently managed pension schemes for governments are considered institutional holdings and will not be removed from available shares.

Corporate Actions Affecting the Russell 1000^® Growth Index.

The following summarizes the types of Russell 1000^® Growth Index maintenance adjustments and indicates whether or not an index adjustment is required:

“No Replacement” Rule – Securities that leave the Russell 1000^® Growth Index, between reconstitution dates, for any reason (e.g., mergers, acquisitions or other similar corporate activity) are not replaced. Thus, the number of securities in the Russell 1000^® Growth Index over the past year will fluctuate according to corporate activity.

Rule for Deletions – When a stock is acquired, delisted, or moves to the pink sheets or bulletin boards on the floor of a U.S. securities exchange, the stock is deleted from the index at the close on the effective date or when the stock is no longer trading on the exchange.

When acquisitions or mergers take place within the Russell 1000^® Growth Index, the stock’s capitalization moves to the acquiring stock, hence, mergers have no effect on the index total capitalization. Shares are updated for the acquiring stock at the time the transaction is final.

Rule for Additions – The only additions between reconstitution dates are as a result of spin-offs and initial public offerings. Spin-off companies are added to the parent company’s index and capitalization tier of membership (i) until the next annual reconstitution date, if the spin-off company is eligible for the Russell 1000^® Index or (ii) for two business days, if the spin-off company is ineligible for the Russell 1000^® Index.

Updates to Share Capital Affecting the Russell 1000^® Growth Index.

In March, June, September, and December, the Russell 1000^® Growth Index is updated for changes to shares outstanding as companies report changes in share capital to the Securities and Exchange Commission. The changes will be implemented quarterly, on the third Friday of the month (after the close). In June, any change to shares outstanding will be implemented. In March, September, and December, only cumulative changes to shares outstanding greater than 3% will be reflected in the Russell 1000^® Growth Index. This does not affect treatment of major corporate events, which are effective on the ex-date.

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License Agreement

“Russell 1000^® Growth Index” is a trademark of LSE and has been licensed for use by Citigroup Global Markets Inc. and its affiliates. This transaction is not sponsored, endorsed, sold, or promoted by LSE and LSE makes no representation regarding the advisability of entering into this transaction.

LSE DOES NOT GUARANTEE THE ACCURACY AND/OR THE COMPLETENESS OF THE Russell 1000^® Growth Index OR ANY DATA INCLUDED THEREIN AND FTSE RUSSELL SHALL HAVE NO LIABILITY FOR ANY ERRORS, OMISSIONS, OR INTERRUPTIONS THEREIN. LSE MAKES NO WARRANTY, EXPRESS OR IMPLIED, AS TO RESULTS TO BE OBTAINED BY CITIGROUP INC. AND/OR ITS AFFILIATES, INVESTORS, OWNERS OF THE SECURITIES, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE Russell 1000^® Growth Index OR ANY DATA INCLUDED THEREIN. LSE MAKES NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE WITH RESPECT TO THE Russell 1000^® Growth Index OR ANY DATA INCLUDED THEREIN. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT SHALL RUSSELL HAVE ANY LIABILITY FOR ANY SPECIAL, PUNITIVE, INDIRECT, OR CONSEQUENTIAL DAMAGES (INCLUDING LOST PROFITS), EVEN IF NOTIFIED OF THE POSSIBILITY OF THEREOF. THERE ARE NO THIRD PARTY BENEFICIARIES OF ANY AGREEMENTS OR ARRANGEMENTS BETWEEN RUSSELL AND CITIGROUP INC.”

The “Russell 1000^® Index” is a trademark of FTSE Russell. The securities are not sponsored, endorsed, sold or promoted by FTSE Russell and FTSE Russell makes no representation regarding the advisability of investing in the securities.

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Citigroup (NYSE:C)
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