The information in this pricing supplement is not complete and may be changed. This preliminary pricing supplement is not an offer to sell these securities, and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.
Subject to completion dated April 6, 2018. 

Preliminary Pricing Supplement No. F635
To Product Supplement No. I-A dated June 30, 2017, Prospectus Supplement dated June 30, 2017 and
Prospectus dated June 30, 2017  Filed Pursuant to Rule 424(b)(2)
Registration Statement No. 333-218604-02
April 6, 2018

Financial Products
$ Reverse Convertible Securities due July 11, 2018 Linked to the Performance of the Common Stock of Grubhub Inc.

• The securities do not guarantee any return of principal or delivery of securities at maturity.

• We will pay a coupon of $7.50 per $1,000 principal amount of securities on each Coupon Payment Date.

• Investors should be willing to (i) forgo dividends and the potential to participate in any appreciation of the Underlying, (ii) accept the risks of owning equities in general and the common stock of Grubhub Inc. in particular, and (iii) if a Knock-In Event has occurred and the Final Level is less than the Initial Level, lose some or all of their investment, excluding coupons on the securities.

• Senior unsecured obligations of Credit Suisse maturing July 11, 2018. Any payment or delivery on the securities is subject to our ability to meet our obligations as they become due.

• Minimum purchase of $1,000. Minimum denominations of $1,000 and integral multiples in excess thereof.

• The offering price for the securities is expected to be determined on or about April 6, 2018 (the “Trade Date”), and the securities are expected to settle on or about April 11, 2018 (the “Settlement Date”). Delivery of the securities in book-entry form only will be made through The Depository Trust Company.

• The securities will not be listed on any exchange.

Investing in the securities involves a number of risks. See “Selected Risk Considerations” beginning on page 5 of this pricing supplement and “Risk Factors” beginning on page PS-3 of any accompanying product supplement.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the securities or passed upon the accuracy or the adequacy of this pricing supplement or any accompanying product supplement, the prospectus supplement and the prospectus. Any representation to the contrary is a criminal offense.

	Price to Public(1)	Underwriting Discounts and Commissions(2)	Proceeds to Issuer
Per security	$1,000	$	$
Total	$	$	$

(1) Certain fiduciary accounts may pay a purchase price of at least $988.75 per $1,000 principal amount of securities, and CSSU or any other agent will forgo any fees with respect to such sales.

(2) We or any agent (one of which may be our affiliate) may pay varying discounts and commissions of up to $11.25 per $1,000 principal amount of securities. For more detailed information, please see “Supplemental Plan of Distribution (Conflicts of Interest)” in this pricing supplement.

Credit Suisse Securities (USA) LLC (“CSSU”) is our affiliate. For more information, see “Supplemental Plan of Distribution (Conflicts of Interest)” in this pricing supplement.

Credit Suisse currently estimates the value of each $1,000 principal amount of the securities on the Trade Date will be between $970 and $990 (as determined by reference to our pricing models and the rate we are currently paying to borrow funds through issuance of the securities (our “internal funding rate”)). This range of estimated values reflects terms that are not yet fixed. A single estimated value reflecting final terms will be determined on the Trade Date. See “Selected Risk Considerations” in this pricing supplement.

The securities are not deposit liabilities and are not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency of the United States, Switzerland or any other jurisdiction.

Credit Suisse

April    , 2018

Key Terms

Issuer:	Credit Suisse AG (“Credit Suisse”), acting through its London branch
Reference Share Issuer:	The issuer of the Underlying.
Underlying:	The securities are linked to the performance of the Underlying set forth in the table below. The Underlying, the ticker symbol, the Initial Level and the Knock-In Level are set forth in the table below. For additional information on the Underlying, see “The Underlying” herein.
	Underlying	Ticker	Initial Level	Knock-In Level
	The common stock of Grubhub Inc.	GRUB UN <Equity>	$100.38	$59.71 (approximately 59.48% of Initial Level)
Coupons:	We will pay a coupon of $7.50 per $1,000 principal amount of securities on each Coupon Payment Date. If any Coupon Payment Date is not a business day, the coupon will be payable on the first following business day, unless that business day falls in the next calendar month, in which case payment will be made on the first preceding business day. The amount of any coupon will not be adjusted in respect of any postponement of a Coupon Payment Date and no interest or other payment will be payable hereon because of any such postponement of a Coupon Payment Date. Coupons will be payable to the holders of record at the close of business on the business day immediately preceding the applicable Coupon Payment Date, provided that the coupon payable on the Maturity Date will be payable to the person to whom the Redemption Amount is payable.
Redemption Amount:	At maturity, the Redemption Amount you will receive will depend on the performance of the Underlying and whether a Knock-In Event has occurred. For each $1,000 principal amount of securities, the cash or shares to be paid or delivered will be determined as follows:

	•	If a Knock-In Event has not occurred, a cash payment equal to $1,000. Therefore, you will not participate in any appreciation of the Underlying.
	•	If a Knock-In Event has occurred and:
		• the Final Level is greater than or equal to the Initial Level, a cash payment equal to $1,000; or
		• the Final Level is less than the Initial Level, the Physical Delivery Amount, plus a cash amount in respect of any fractional share, subject to our election to pay cash instead as noted below.
	If a Knock-In Event has occurred and the Final Level is less than the Initial Level, you could receive the shares of the Underlying with a value likely to be less than $1,000. You could lose your entire investment. Any payment or delivery on the securities is subject to our ability to meet our obligations as they become due.
Physical Delivery Amount:	The Physical Delivery Amount per $1,000 principal amount of securities is a number of shares of the Underlying equal to the product of (i) $1,000 divided by the Initial Level and (ii) the share adjustment factor. The share adjustment factor is initially set equal to 1.0 on the Trade Date, subject to adjustment as described under “Description of the Securities—Adjustments” in any accompanying product supplement. We will calculate the Physical Delivery Amount in the aggregate for all securities you hold and, in lieu of any fractional shares in respect of the aggregate Physical Delivery Amount, we will pay a cash amount equal to such fractional share multiplied by the Final Level. If the fractional share amount to be paid in cash is a de minimis amount, as determined by the calculation agent, the holder will not receive such amount. At our election, you may receive cash instead of the Physical Delivery Amount, in an amount equal to the product of (i) $1,000 divided by the Initial Level and (ii) the Final Level. If we exercise our option to deliver cash, we will give notice of our election at least one business day before the Valuation Date.
Knock-In Event:	A Knock-In Event will occur if, on any trading day during the Observation Period, the closing level of the Underlying is less than the Knock-In Level.
Initial Level:	An intraday level of the Underlying on the Strike Date, as set forth in the table above.
Observation Period:	The period from but excluding the Trade Date to and including the Valuation Date.
Final Level:	The closing level of the Underlying on the Valuation Date.
Strike Date:	April 5, 2018
Valuation Date:	July 6, 2018, subject to postponement as set forth in any accompanying product supplement under “Description of the Securities—Postponement of calculation dates.”

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Maturity Date:	July 11, 2018, subject to postponement as set forth in any accompanying product supplement under “Description of the Securities—Postponement of calculation dates.” If the Maturity Date is not a business day, the Redemption Amount will be payable on the first following business day, unless that business day falls in the next calendar month, in which case payment will be made on the first preceding business day.
CUSIP:	22549JB82
Key Dates:	Each Coupon Payment Date is set forth in the table below. The Key Dates are subject to postponement as set forth in any accompanying product supplement under “Description of the Securities—Postponement of calculation dates.”

Coupon Payment Dates

May 11, 2018

June 11, 2018

Maturity Date

You may revoke your offer to purchase the securities at any time prior to the time at which we accept such offer on the date the securities are priced. We reserve the right to change the terms of, or reject any offer to purchase the securities prior to their issuance. In the event of any changes to the terms of the securities, we will notify you and you will be asked to accept such changes in connection with your purchase. You may also choose to reject such changes in which case we may reject your offer to purchase.

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Additional Terms Specific to the Securities

You should read this pricing supplement together with the product supplement dated June 30, 2017, the prospectus supplement dated June 30, 2017 and the prospectus dated June 30, 2017, relating to our Medium-Term Notes of which these securities are a part. You may access these documents on the SEC website at www.sec.gov as follows (or if such address has changed, by reviewing our filings for the relevant date on the SEC website):

• Product Supplement No. I-A dated June 30, 2017:
http://www.sec.gov/Archives/edgar/data/1053092/000095010317006315/dp77780_424b2-ia.htm

• Prospectus Supplement and Prospectus dated June 30, 2017:
http://www.sec.gov/Archives/edgar/data/1053092/000104746917004364/a2232566z424b2.htm

In the event the terms of the securities described in this pricing supplement differ from, or are inconsistent with, the terms described in any product supplement, the prospectus supplement or prospectus, the terms described in this pricing supplement will control.

Our Central Index Key, or CIK, on the SEC website is 1053092. As used in this pricing supplement, “we,” “us,” or “our” refers to Credit Suisse.

This pricing supplement, together with the documents listed above, contains the terms of the securities and supersedes all other prior or contemporaneous oral statements as well as any other written materials including preliminary or indicative pricing terms, fact sheets, correspondence, trade ideas, structures for implementation, sample structures, brochures or other educational materials of ours. We may, without the consent of the registered holder of the securities and the owner of any beneficial interest in the securities, amend the securities to conform to its terms as set forth in this pricing supplement and the documents listed above, and the trustee is authorized to enter into any such amendment without any such consent. You should carefully consider, among other things, the matters set forth in “Selected Risk Considerations” in this pricing supplement and “Risk Factors” in any accompanying product supplement, “Foreign Currency Risks” in the accompanying prospectus, and any risk factors we describe in the combined Annual Report on Form 20-F of Credit Suisse Group AG and us incorporated by reference therein, and any additional risk factors we describe in future filings we make with the SEC under the Securities Exchange Act of 1934, as amended, as the securities involve risks not associated with conventional debt securities. You should consult your investment, legal, tax, accounting and other advisors before deciding to invest in the securities.

Prohibition of Sales to EEA Retail Investors

The securities may not be offered, sold or otherwise made available to any retail investor in the European Economic Area. For the purposes of this provision:

(a) the expression “retail investor” means a person who is one (or more) of the following:

(i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended, “MiFID II”); or

(ii) a customer within the meaning of Directive 2002/92/EC, where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or

(iii) not a qualified investor as defined in Directive 2003/71/EC; and

(b) the expression “offer” includes the communication in any form and by any means of sufficient information on the terms of the offer and the securities offered so as to enable an investor to decide to purchase or subscribe the securities.

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Hypothetical Redemption Amounts and Total Payments on the Securities

The tables and examples below illustrate, for a $1,000 investment in the securities, hypothetical Redemption Amounts payable at maturity for a hypothetical range of performance of the Underlying and in the case of the tables, total payments over the term of the securities. The tables and examples below assume that (i) a coupon of $7.50 per $1,000 principal amount of securities will be paid on each Coupon Payment Date, (ii) the hypothetical Initial Level is $101, (iii) the Knock-In Level is 59.48% of the Initial Level, (iv) a share adjustment factor is 1.0, (v) the term of the securities is exactly three months and (vi) if the Physical Delivery Amount is to be delivered at maturity, we do not exercise our right to pay cash instead of the Physical Delivery Amount. The actual coupon, Initial Level and Knock-In Level are set forth in the table above. The examples are intended to illustrate hypothetical calculations of only the Redemption Amount and do not illustrate the calculation or payment of any individual coupon.

The hypothetical Redemption Amounts and total payment amounts set forth below are for illustrative purposes only. The actual Redemption Amount and total payments applicable to a purchaser of the securities will depend on whether, on any trading day during the Observation Period, the closing level of the Underlying is less than the Knock-In Level and on the Final Level. It is not possible to predict whether a Knock-In Event will occur and, in the event that there is a Knock-In Event, whether and by how much the level of the Underlying has decreased from the Initial Level to the Final Level.

You will not participate in any appreciation in the Underlying. You should consider carefully whether the securities are suitable to your investment goals. Any payment or delivery on the securities is subject to our ability to meet our obligations as they become due. The numbers appearing in the tables and examples below have been rounded for ease of analysis.

Table 1: A Knock-In Event has not occurred.

Percentage Change from the Initial Level to the Final Level	Return on the Securities (excluding coupons)	Redemption Amount (excluding coupon on the securities)	Total Coupons	Total Payment
100%	0%	$1,000	$22.50	$1,022.50
90%	0%	$1,000	$22.50	$1,022.50
80%	0%	$1,000	$22.50	$1,022.50
70%	0%	$1,000	$22.50	$1,022.50
60%	0%	$1,000	$22.50	$1,022.50
50%	0%	$1,000	$22.50	$1,022.50
40%	0%	$1,000	$22.50	$1,022.50
30%	0%	$1,000	$22.50	$1,022.50
20%	0%	$1,000	$22.50	$1,022.50
10%	0%	$1,000	$22.50	$1,022.50
0%	0%	$1,000	$22.50	$1,022.50
−10%	0%	$1,000	$22.50	$1,022.50
−20%	0%	$1,000	$22.50	$1,022.50
−30%	0%	$1,000	$22.50	$1,022.50
−40%	0%	$1,000	$22.50	$1,022.50
−40.52%	0%	$1,000	$22.50	$1,022.50

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Table 2: A Knock-In Event has occurred.

Percentage Change from the Initial Level to the Final Level	Return on the Securities (excluding coupons)	Redemption Amount (excluding coupons on the securities)	Total Coupons	Total Payment
100%	0%	$1,000	$22.50	$1,022.50
90%	0%	$1,000	$22.50	$1,022.50
80%	0%	$1,000	$22.50	$1,022.50
70%	0%	$1,000	$22.50	$1,022.50
60%	0%	$1,000	$22.50	$1,022.50
50%	0%	$1,000	$22.50	$1,022.50
40%	0%	$1,000	$22.50	$1,022.50
30%	0%	$1,000	$22.50	$1,022.50
20%	0%	$1,000	$22.50	$1,022.50
10%	0%	$1,000	$22.50	$1,022.50
0%	0%	$1,000	$22.50	$1,022.50
−10%	−10%	9 shares + $81.90	$22.50	9 shares + $104.40
−20%	−20%	9 shares + $72.80	$22.50	9 shares + $95.30
−30%	−30%	9 shares + $63.70	$22.50	9 shares + $86.20
−40%	−40%	9 shares + $54.60	$22.50	9 shares + $77.10
−50%	−50%	9 shares + $45.50	$22.50	9 shares + $68
−60%	−60%	9 shares + $36.40	$22.50	9 shares + $58.90
−70%	−70%	9 shares + $27.30	$22.50	9 shares + $49.80
−80%	−80%	9 shares + $18.20	$22.50	9 shares + $40.70
−90%	−90%	9 shares + $9.10	$22.50	9 shares + $31.60
−100%	−100%	$0	$22.50	$22.50

The following examples illustrate how the Redemption Amount (excluding coupons on the securities) is calculated.

Example 1: The Final Level of the Underlying represents an increase of 10% from the Initial Level and a Knock-In Event has not occurred. Since a Knock-In Event has not occurred, the Redemption Amount is equal to the principal amount. The investor will receive at maturity a payment in cash equal to $1,000 per $1,000 principal amount of securities.

Example 2: The Final Level of the Underlying represents a decrease of 10% from the Initial Level and a Knock-In Event has not occurred. Since a Knock-In Event has not occurred, the Redemption Amount is equal to the principal amount even though the Final Level is less than the Initial Level. The investor will receive at maturity a payment in cash equal to $1,000 per $1,000 principal amount of securities.

Example 3: The Final Level of the Underlying represents an increase of 10% from the Initial Level and a Knock-In Event has occurred. Although a Knock-In Event has occurred, since the Final Level is greater than the Initial Level, the Redemption Amount is equal to the principal amount. The investor will receive at maturity a payment in cash equal to $1,000 per $1,000 principal amount of securities.

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Example 4: The Final Level of the Underlying represents a decrease of 10% from the Initial Level and a Knock-In Event has occurred. Since a Knock-In Event has occurred and the Final Level is less than the Initial Level, the investor will receive at maturity the Physical Delivery Amount, calculated as follows:

Physical Delivery Amount	=	$1,000/Initial Level
	=	$1,000/101
	=	9 shares of the Underlying (9.9010 rounded down)
Redemption Amount	=	Physical Delivery Amount + cash in lieu of fractional shares equal to approximately 0.9010 × $90.90
	=	9 shares of the Underlying + $81.90

In this example, at maturity an investor would receive a Redemption Amount equal to 9 shares of the Underlying and a cash payment of $81.90. The value of the Redemption Amount on the Valuation Date, which is the date on which the Final Level is determined, is $900, calculated as follows:

Physical Delivery Amount	=	9 shares of the Underlying
Value of Redemption Amount	=	(9 shares of the Underlying × $90.90) + $81.90
	=	$818.10 + $81.90
	=	$900

In these circumstances, the investor will be exposed to any depreciation in the level of the Underlying from the Initial Level to the time of delivery.

Example 5: The Final Level of the Underlying represents a decrease of 50% from the Initial Level and a Knock-In Event has occurred. Since a Knock-In Event has occurred and the Final Level is less than the Initial Level, the investor will receive at maturity the Physical Delivery Amount, calculated as follows:

Physical Delivery Amount	=	$1,000/Initial Level
	=	$1,000/$101
	=	9 shares of the Underlying (9.9010 rounded down)
Redemption Amount	=	Physical Delivery Amount +  cash in lieu of fractional shares equal to approximately 0.9010 × $50.50
	=	9 shares of the Underlying + $45.50

In this example, at maturity an investor would receive a Redemption Amount equal to 9 shares of the Underlying and a cash payment of $45.50. The value of the Redemption Amount on the Valuation Date, which is the date on which the Final Level is determined, is $500, calculated as follows:

Physical Delivery Amount	=	9 shares of the Underlying
Value of Redemption Amount	=	(9 shares of the Underlying × $50.50) + $45.50
	=	$454.50 + $45.50
	=	$500

In these circumstances, the investor will be exposed to any depreciation in the level of the Underlying from the Initial Level to the time of delivery.

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Selected Risk Considerations

An investment in the securities involves significant risks. Investing in the securities is not equivalent to investing directly in the Underlying. These risks are explained in more detail in the “Risk Factors” section of any accompanying product supplement.

• YOU MAY RECEIVE LESS THAN THE PRINCIPAL AMOUNT AT MATURITY — You may receive less at maturity than you originally invested in the securities, or you may receive nothing, excluding any accrued and unpaid coupons. If on any trading day during the Observation Period, the closing level of the Underlying is less than the Knock-In Level and the Final Level is less than the Initial Level, you will be fully exposed to any depreciation in the Underlying. In this case, the Redemption Amount you will receive is likely to be less than the principal amount of the securities, and you could lose your entire investment. It is not possible to predict whether a Knock-In Event will occur, and in the event that there is a Knock-In Event, whether and by how much the closing level of the Underlying has decreased from the Initial Level to the Final Level. Any payment or delivery on the securities is subject to our ability to meet our obligations as they become due.

• REGARDLESS OF THE AMOUNT OF ANY PAYMENT YOU RECEIVE ON THE SECURITIES, YOUR ACTUAL YIELD MAY BE DIFFERENT IN REAL VALUE TERMS — Inflation may cause the real value of any payment you receive on the securities to be less at maturity than it is at the time you invest. An investment in the securities also represents a forgone opportunity to invest in an alternative asset that generates a higher real return. You should carefully consider whether an investment that may result in a return that is lower than the return on alternative investments is appropriate for you.

• MORE FAVORABLE TERMS TO YOU ARE GENERALLY ASSOCIATED WITH AN UNDERLYING WITH GREATER EXPECTED VOLATILITY AND THEREFORE CAN INDICATE A GREATER RISK OF LOSS — “Volatility” refers to the frequency and magnitude of changes in the level of the Underlying. The greater the expected volatility with respect to the Underlying on the Strike Date, the higher the expectation as of the Trade Date that the level of the Underlying could be less than the Knock-In Level on any trading day during the Observation Period, indicating a higher expected risk of loss on the securities. This greater expected risk will generally be reflected in a higher coupon than the yield payable on our conventional debt securities with a similar maturity, or in more favorable terms (such as a lower Knock-In Level) than for similar securities linked to the performance of the Underlying with a lower expected volatility as of the Trade Date. You should therefore understand that a relatively higher coupon may indicate an increased risk of loss. Further, a relatively lower Knock-In Level may not necessarily indicate that the securities have a greater likelihood of a return of principal at maturity. The volatility of the Underlying can change significantly over the term of the securities. The level of the Underlying for your securities could fall sharply, which could result in a significant loss of principal. You should be willing to accept the downside market risk of the Underlying and the potential to lose a significant amount of your principal at maturity.

• THE SECURITIES WILL NOT PAY MORE THAN THE PRINCIPAL AMOUNT PLUS THE ACCRUED AND UNPAID COUPONS, AT MATURITY — The securities will not pay more than the principal amount plus the accrued and unpaid coupons, at maturity, regardless of the performance of the Underlying. Even if the Final Level is greater than the Initial Level (regardless of whether a Knock-In Event has occurred), you will not participate in the appreciation of the Underlying. The maximum amount payable with respect to the securities (excluding any coupons) is $1,000 for each $1,000 principal amount of the securities.

• THE SECURITIES ARE SUBJECT TO THE CREDIT RISK OF CREDIT SUISSE — Investors are dependent on our ability to pay all amounts due on the securities, and therefore, if we were to default on our obligations, you may not receive any amounts owed to you under the securities. In addition, any decline in our credit ratings, any adverse changes in the market’s view of our creditworthiness or any increase in our credit spreads is likely to adversely affect the value of the securities prior to maturity.

• THE REDEMPTION AMOUNT PAYABLE AT MATURITY WILL BE AFFECTED BY THE KNOCK-IN LEVEL, THE OCCURRENCE OF A KNOCK-IN EVENT AND THE FINAL LEVEL — If on any trading

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day during the Observation Period, the closing level of the Underlying is less than the Knock-In Level, a Knock-In Event will occur. If a Knock-In Event has occurred and the Final Level is less than the Initial Level, the Physical Delivery Amount will consist of a number of shares of the Underlying plus an amount in cash corresponding to any fractional share, or at our election, the equivalent amount in cash, as described herein. Under these circumstances, the value of the Physical Delivery Amount is likely to be less than the principal amount of the securities and may be zero.

• THE VALUE OF THE PHYSICAL DELIVERY AMOUNT COULD BE LESS ON THE MATURITY DATE THAN ON THE VALUATION DATE — If a Knock-In Event has occurred and the Final Level is less than the Initial Level, you will receive on the Maturity Date the Physical Delivery Amount, which will consist of a whole number of shares of the Underlying plus an amount in cash corresponding to any fractional share, subject to our election to pay cash instead. The value of the Physical Delivery Amount on the Valuation Date will be less than $1,000 per $1,000 principal amount of securities and could fluctuate, possibly decreasing, in the period between the Valuation Date and the Maturity Date. We will make no adjustments to the Physical Delivery Amount to account for any such fluctuation and you will bear the risk of any decrease in the value of the Physical Delivery Amount between the Valuation Date and the Maturity Date.

• NO AFFILIATION WITH THE REFERENCE SHARE ISSUER — We are not affiliated with the Reference Share Issuer. You should make your own investigation into the Underlying and the Reference Share Issuer. In connection with the offering of the securities, neither we nor our affiliates have participated in the preparation of any publicly available documents or made any due diligence inquiry with respect to the Reference Share Issuer.

• HEDGING AND TRADING ACTIVITY — We or any of our affiliates may carry out hedging activities related to the securities, including in the Underlying or instruments related to the Underlying. We or our affiliates may also trade in the Underlying or instruments related to the Underlying from time to time. Any of these hedging or trading activities as of the Trade Date and during the term of the securities could adversely affect our payment to you at maturity.

• THE ESTIMATED VALUE OF THE SECURITIES ON THE TRADE DATE MAY BE LESS THAN THE PRICE TO PUBLIC — The initial estimated value of your securities on the Trade Date (as determined by reference to our pricing models and our internal funding rate) may be significantly less than the original Price to Public. The Price to Public of the securities includes any discounts or commissions as well as transaction costs such as expenses incurred to create, document and market the securities and the cost of hedging our risks as issuer of the securities through one or more of our affiliates (which includes a projected profit). These costs will be effectively borne by you as an investor in the securities. These amounts will be retained by Credit Suisse or our affiliates in connection with our structuring and offering of the securities (except to the extent discounts or commissions are reallowed to other broker-dealers or any costs are paid to third parties).

On the Trade Date, we value the components of the securities in accordance with our pricing models. These include a fixed income component valued using our internal funding rate, and individual option components valued using mid-market pricing. As such, the payout on the securities can be replicated using a combination of these components and the value of these components, as determined by us using our pricing models, will impact the terms of the securities at issuance. Our option valuation models are proprietary. Our pricing models take into account factors such as interest rates, volatility and time to maturity of the securities, and they rely in part on certain assumptions about future events, which may prove to be incorrect.

Because Credit Suisse’s pricing models may differ from other issuers’ valuation models, and because funding rates taken into account by other issuers may vary materially from the rates used by Credit Suisse (even among issuers with similar creditworthiness), our estimated value at any time may not be comparable to estimated values of similar securities of other issuers.

• EFFECT OF INTEREST RATE USED IN STRUCTURING THE SECURITIES — The internal funding rate we use in structuring notes such as these securities is typically lower than the interest rate that is reflected in the yield on our conventional debt securities of similar maturity in the secondary market (our “secondary market credit spreads”).  If on the Trade Date our internal funding rate is lower than

6 

our secondary market credit spreads, we expect that the economic terms of the securities will generally be less favorable to you than they would have been if our secondary market credit spread had been used in structuring the securities. We will also use our internal funding rate to determine the price of the securities if we post a bid to repurchase your securities in secondary market transactions. See “—Secondary Market Prices” below.

• SECONDARY MARKET PRICES — If Credit Suisse (or an affiliate) bids for your securities in secondary market transactions, which we are not obligated to do, the secondary market price (and the value used for account statements or otherwise) may be higher or lower than the Price to Public and the estimated value of the securities on the Trade Date. The estimated value of the securities on the cover of this pricing supplement does not represent a minimum price at which we would be willing to buy the securities in the secondary market (if any exists) at any time. The secondary market price of your securities at any time cannot be predicted and will reflect the then-current estimated value determined by reference to our pricing models and other factors. These other factors include our internal funding rate, customary bid and ask spreads and other transaction costs, changes in market conditions and any deterioration or improvement in our creditworthiness. In circumstances where our internal funding rate is lower than our secondary market credit spreads, our secondary market bid for your securities could be more favorable than what other dealers might bid because, assuming all else equal, we use the lower internal funding rate to price the securities and other dealers might use the higher secondary market credit spread to price them. Furthermore, assuming no change in market conditions from the Trade Date, the secondary market price of your securities will be lower than the Price to Public because it will not include any discounts or commissions and hedging and other transaction costs. If you sell your securities to a dealer in a secondary market transaction, the dealer may impose an additional discount or commission, and as a result the price you receive on your securities may be lower than the price at which we may repurchase the securities from such dealer.

We (or an affiliate) may initially post a bid to repurchase the securities from you at a price that will exceed the then-current estimated value of the securities. That higher price reflects our projected profit and costs that were included in the Price to Public, and that higher price may also be initially used for account statements or otherwise. We (or our affiliate) may offer to pay this higher price, for your benefit, but the amount of any excess over the then-current estimated value will be temporary and is expected to decline over a period of approximately one and a half months.

The securities are not designed to be short-term trading instruments and any sale prior to maturity could result in a substantial loss to you. You should be willing and able to hold your securities to maturity.

• CREDIT SUISSE IS SUBJECT TO SWISS REGULATION — As a Swiss bank, Credit Suisse is subject to regulation by governmental agencies, supervisory authorities and self-regulatory organizations in Switzerland. Such regulation is increasingly more extensive and complex and subjects Credit Suisse to risks. For example, pursuant to Swiss banking laws, the Swiss Financial Market Supervisory Authority (FINMA) may open resolution proceedings if there are justified concerns that Credit Suisse is over-indebted, has serious liquidity problems or no longer fulfills capital adequacy requirements. FINMA has broad powers and discretion in the case of resolution proceedings, which include the power to convert debt instruments and other liabilities of Credit Suisse into equity and/or cancel such liabilities in whole or in part. If one or more of these measures were imposed, such measures may adversely affect the terms and market value of the securities and/or the ability of Credit Suisse to make payments thereunder and you may not receive any amounts owed to you under the securities.

• LACK OF LIQUIDITY — The securities will not be listed on any securities exchange. Credit Suisse (or its affiliates) intends to offer to purchase the securities in the secondary market but is not required to do so. Even if there is a secondary market, it may not provide enough liquidity to allow you to trade or sell the securities when you wish to do so. Because other dealers are not likely to make a secondary market for the securities, the price at which you may be able to trade your securities is likely to depend on the price, if any, at which Credit Suisse (or its affiliates) is willing to buy the securities. If you have to sell your securities prior to maturity, you may not be able to do so or you may have to sell them at a substantial loss.

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• POTENTIAL CONFLICTS — We and our affiliates play a variety of roles in connection with the issuance of the securities, including acting as calculation agent and as agent of the issuer for the offering of the securities, hedging our obligations under the securities and determining their estimated value. In performing these duties, the economic interests of us and our affiliates are potentially adverse to your interests as an investor in the securities. Further, hedging activities may adversely affect any payment on or the value of the securities. Any profit in connection with such hedging activities will be in addition to any other compensation that we and our affiliates receive for the sale of the securities, which creates an additional incentive to sell the securities to you. We and/or our affiliates may also currently or from time to time engage in business with the Reference Share Issuer, including extending loans to, or making equity investments in, the Reference Share Issuer or providing advisory services to the Reference Share Issuer. In addition, one or more of our affiliates may publish research reports or otherwise express opinions with respect to the Reference Share Issuer and these reports may or may not recommend that investors buy or hold shares of the Underlying. As a prospective purchaser of the securities, you should undertake an independent investigation of the Reference Share Issuer that in your judgment is appropriate to make an informed decision with respect to an investment in the securities.

• UNPREDICTABLE ECONOMIC AND MARKET FACTORS WILL AFFECT THE VALUE OF THE SECURITIES — The payout on the securities can be replicated using a combination of the components described in “The estimated value of the securities on the Trade Date may be less than the Price to Public.” Therefore, in addition to the level of the Underlying on any trading day during the Observation Period, the terms of the securities at issuance and the value of the securities prior to maturity may be influenced by factors that impact the value of fixed income securities and options in general, such as:

o the expected and actual volatility of the Underlying;

o the time to maturity of the securities;

o the dividend rate on the Underlying;

o interest and yield rates in the market generally;

o investors’ expectations with respect to the rate of inflation;

o events affecting companies engaged in the electric services industry;

o geopolitical conditions and economic, financial, political, regulatory or judicial events that affect the Reference Share Issuer or markets generally and which may affect the level of the Underlying; and

o our creditworthiness, including actual or anticipated downgrades in our credit ratings.

Some or all of these factors may influence the price that you will receive if you choose to sell your securities prior to maturity. The impact of any of the factors set forth above may enhance or offset some or all of any change resulting from another factor or factors.

• NO OWNERSHIP RIGHTS IN THE UNDERLYING — Your return on the securities will not reflect the return you would realize if you actually owned shares of the Underlying. The return on your investment is not the same as the total return based on a purchase of shares of the Underlying.

• NO DIVIDEND PAYMENTS OR VOTING RIGHTS — As a holder of the securities, you will not have any ownership interest or rights in the Underlying, such as voting rights or dividend payments. In addition, the issuer of the Underlying will not have any obligation to consider your interests as a holder of the securities in taking any corporate action that might affect the value of the Underlying and therefore, the value of the securities.

• ANTI-DILUTION PROTECTION IS LIMITED — The calculation agent will make anti-dilution adjustments for certain events affecting the Underlying. However, an adjustment will not be required

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in response to all events that could affect the Underlying. If an event occurs that does not require the calculation agent to make an adjustment, or if an adjustment is made but such adjustment does not fully reflect the economics of such event, the value of the securities may be materially and adversely affected. See “Description of the Securities—Adjustments” in the relevant product supplement.

• 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 described in “United States Federal Tax Considerations” below. If the IRS were successful in asserting an alternative treatment, the tax consequences of ownership and disposition of the securities, including the timing and character of income recognized by U.S. investors and the withholding tax consequences to non-U.S. investors, 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.

Supplemental Use of Proceeds and Hedging

We intend to use the proceeds of this offering for our general corporate purposes, which may include the refinancing of existing debt outside Switzerland. Some or all of the proceeds we receive from the sale of the securities may be used in connection with hedging our obligations under the securities through one or more of our affiliates. Such hedging or trading activities on or prior to the Trade Date and during the term of the securities (including on any calculation date, as defined in any accompanying product supplement) could adversely affect the value of the Underlying and, as a result, could decrease the amount you may receive on the securities at maturity. For additional information, see “Supplemental Use of Proceeds and Hedging” in any accompanying product supplement.

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The Underlying

Companies with securities registered under the Securities Exchange Act of 1934 (the “Exchange Act”) are required to periodically file certain financial and other information specified by the SEC. Information provided to or filed with the SEC by the Reference Share Issuer pursuant to the Exchange Act can be located by reference to the SEC file number provided below.

According to its publicly available filings with the SEC, Grubhub Inc. is an online and mobile platform for restaurant pick-up and delivery orders. The common stock of Grubhub Inc. is listed on the New York Stock Exchange. Grubhub Inc.’s SEC file number is 001-36389 and can be accessed through www.sec.gov.

This pricing supplement relates only to the securities offered hereby and does not relate to the Underlying or other securities of the Reference Share Issuer. We have derived all disclosures contained in this pricing supplement regarding the Underlying and the Reference Share Issuer from the publicly available documents described in the preceding paragraph. In connection with the offering of the securities, neither we nor our affiliates have participated in the preparation of such documents or made any due diligence inquiry with respect to the Reference Share Issuer.

Historical Information

The following graph sets forth the historical performance of the Underlying based on the closing level of the common stock of Grubhub Inc. from January 2, 2013 through April 5, 2018. We obtained the historical information below from Bloomberg, without independent verification.

You should not take the historical levels of the Underlying as an indication of future performance of the Underlying or the securities. Any historical trend in the level of the Underlying during any period set forth below is not an indication that the level of the Underlying is more or less likely to increase or decrease at any time over the term of the securities.

For additional information on the Underlying, see the information set forth under “The Underlying” herein.

The closing level of the common stock of Grubhub Inc. on April 5, 2018 was $100.18.

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United States Federal Tax Considerations

This discussion supplements and, to the extent inconsistent therewith, supersedes the discussion in the accompanying product supplement under “Material United States Federal Income Tax Considerations.” The discussions below and in the accompanying product supplement do not address the consequences to taxpayers subject to special tax accounting rules under Section 451(b) of the Internal Revenue Code.

Due to the lack of any controlling legal authority, there is substantial uncertainty regarding the U.S. federal tax consequences of an investment in the securities. In the opinion of our counsel, Davis Polk & Wardwell LLP, it is reasonable under current law to treat the securities for U.S. federal income tax purposes as a put option (the “Put Option”) written by you with respect to the underlying shares, secured by a cash deposit equal to the stated principal amount of the security (the “Deposit”). However, our counsel has advised us that it is unable to conclude affirmatively that this treatment is more likely than not to be upheld, and that alternative treatments are possible that could materially affect the timing and character of income or loss you recognize on the securities. 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 Trade Date.

Under this treatment:

· a portion of each coupon paid with respect to the securities will be attributable to interest on the Deposit; and

· the remainder will represent premium attributable to your grant of the Put Option (“Put Premium”).

We will specify in the final pricing supplement the portion of each coupon that we will allocate to interest on the Deposit and to Put Premium, respectively.

Assuming the treatment of a security as a Put Option and a Deposit is respected, amounts treated as interest on the Deposit should be taxed as ordinary interest income, while the Put Premium should not be taken into account prior to maturity or disposition of the securities.

Under this treatment, if you receive cash upon the redemption of the securities at maturity, you should recognize short-term capital gain in respect of the Put Option equal to the aggregate Put Premium previously received (including the Put Premium received upon redemption).  If you receive underlying shares at maturity of the securities, you should not recognize gain or loss with respect to the Put Option (other than in respect of cash received in lieu of a fractional share) but instead should have a tax basis in the underlying shares received (including any fractional share deemed received) equal to your tax basis in the securities minus the aggregate Put Premium previously received.  If you dispose of the securities prior to their maturity, you should recognize gain or loss with respect to the Put Option and the Deposit by allocating the amounts you receive on the disposition based on the fair market values of the Put Option and the Deposit at that time.  In the case of the Put Option, the aggregate amount of Put Premium previously received should be added to the amount received upon the disposition for purposes of calculating your gain or loss with respect to the Put Option.

We do not plan to request a ruling from the IRS regarding the treatment of the securities, and the IRS or a court might not agree with the treatment described herein. For example, the entire coupon could be treated as ordinary income at the time received or accrued. Alternatively, the securities might be determined to be short-term debt instruments, in which case the tax consequences of ownership and disposition of the securities, including the timing and character of income recognized, might be materially and adversely affected. Moreover, 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. In addition, 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 advisor regarding possible alternative tax treatments of the securities and potential changes in applicable law.

This discussion does not address the U.S. federal tax consequences of the ownership or disposition of the underlying shares that you may receive at maturity. You should consult your tax advisor regarding the U.S. federal tax consequences of the ownership and disposition of the underlying shares.

Non-U.S. Holders. Except as provided below and in the accompanying product supplement under “Material United States Federal Income Tax Considerations—Securities Held Through Foreign Entities” and “Material United States Federal Income Tax Considerations—Non-U.S. Holders Generally—Substitute Dividend and

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Dividend Equivalent Payments,” in general, we currently do not intend to treat coupons paid to a Non-U.S. Holder (as defined in the accompanying product supplement) of the securities as subject to U.S. federal withholding tax, provided that the Non-U.S. Holder complies with applicable certification requirements to establish the Non-U.S. Holder’s status as a non-United States person. However, it is possible that the IRS could assert that such payments are subject to U.S. withholding tax, or that we or another withholding agent may otherwise determine that withholding is required, in which case we or the other withholding agent may withhold at a rate of up to 30% on such payments.

Moreover, as discussed under “Material United States Federal Income Tax Considerations—Non-U.S. Holders Generally—Substitute Dividend and Dividend Equivalent Payments” in the accompanying product supplement, Section 871(m) of the Internal Revenue Code generally imposes 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 or indices that include U.S. equities. Treasury regulations under Section 871(m), as modified by an IRS notice, exclude from their scope financial instruments issued in 2018 that do not have a “delta” of one with respect to any U.S. equity. 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. 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 Trade Date for the securities and it is possible that the securities will be subject to withholding tax under Section 871(m) based on circumstances on 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 determination. Moreover, Section 871(m) is complex and its application may depend on your particular circumstances, including whether you enter into other transactions with respect to a U.S. equity to which the securities relate. You should consult your tax advisor regarding the potential application of Section 871(m) to the securities.

We will not be required to pay any additional amounts with respect to U.S. federal withholding taxes.

You should read the section entitled “Material United States Federal Income 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 advisor 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.

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Supplemental Plan of Distribution (Conflicts of Interest)

Under the terms and subject to the conditions contained in a distribution agreement dated May 7, 2007, as amended, which we refer to as the distribution agreement, we have agreed to sell the securities to CSSU. We may also agree to sell the securities to other agents that are parties to the distribution agreement. We refer to CSSU and other such agents as the “Agents.”

The distribution agreement provides that the Agents are obligated to purchase all of the securities if any are purchased.

The Agents may offer the securities at the offering price set forth on the cover page of this pricing supplement, may receive varying discounts and commissions of up to $11.25 per $1,000 principal amount of securities and will forgo some or all fees for sales to fiduciary accounts. The Agents may re-allow some or all of the discount on the principal amount per security on sales of such securities by other brokers or dealers. If all of the securities are not sold at the initial offering price, the Agents may change the public offering price and other selling terms.

An affiliate of Credit Suisse has paid or may pay in the future a fixed amount to broker-dealers in connection with the costs of implementing systems to support these securities.

We expect to deliver the securities against payment for the securities on the Settlement Date indicated herein, which may be a date that is greater than two business days following the Trade Date. Under Rule 15c6-1 of the Securities Exchange Act of 1934, as amended, trades in the secondary market generally are required to settle in two business days, unless the parties to a trade expressly agree otherwise. Accordingly, if the Settlement Date is more than two business days after the Trade Date, purchasers who wish to transact in the securities more than two business days prior to the Settlement Date will be required to specify alternative settlement arrangements to prevent a failed settlement.

CSSU is our affiliate. In accordance with FINRA Rule 5121, CSSU may not make sales in this offering to any of its discretionary accounts without the prior written approval of the customer. A portion of the net proceeds from the sale of the securities will be used by CSSU or one of its affiliates in connection with hedging our obligations under the securities.

For further information, please refer to “Underwriting (Conflicts of Interest)” in any accompanying product supplement.

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Credit Suisse