Filed Pursuant to Rule 424(b)(2)
Registration No. 333-216286

The information in this preliminary Pricing Supplement is not complete and may be changed. This preliminary Pricing Supplement and the accompanying Prospectus Supplement and Prospectus are not an offer to sell these securities and we are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to Completion, Dated May 2, 2018

The notes do not bear interest. The amount that you will be paid on your notes on the stated maturity date (expected to be the second scheduled business day after the determination date) is based on the performance of the S&P MidCap 400® Index (the “underlier”) as measured from the trade date to and including the determination date (expected to be between 24 and 27 months after the trade date). If the final underlier level on the determination date is greater than the initial underlier level (set on the trade date and may be higher or lower than the actual closing level of the underlier on that date), the return on your notes will be positive, subject to the maximum settlement amount (expected to be between $1,185.70 and $1,218.25 for each $1,000 face amount of your notes). If the final underlier level declines by up to 10.00% from the initial underlier level, you will receive the face amount of your notes. If the final underlier level declines by more than 10.00% from the initial underlier level, the return on your notes will be negative.

To determine your payment at maturity, we will calculate the underlier return, which is the percentage increase or decrease in the final underlier level from the initial underlier level. On the stated maturity date, for each $1,000 face amount of your notes, you will receive an amount in cash equal to:

·      if the underlier return is positive (i.e. the final underlier level is greater than the initial underlier level), the sum of (i) $1,000 plus (ii) the product of (a) $1,000 times (b) 1.5 times (c) the underlier return, subject to the maximum settlement amount;

·      if the underlier return is zero or negative but not below -10.00% (i.e. the final underlier level is equal to the initial underlier level or is less than the initial underlier level, but not by more than 10.00%), $1,000; or

·      if the underlier return is negative and is below -10.00% (i.e. the final underlier level is less than the initial underlier level by more than 10.00%), the sum of (i) $1,000 plus (ii) the product of (a) approximately 1.1111 times (b) the sum of the underlier return plus 10.00% times (c) $1,000.

The notes have complex features and investing in the notes involves risks not associated with an investment in conventional debt securities. See “Additional Risk Factors Specific to Your Notes” herein on page PRS-11.

Our estimated value of the notes on the trade date, based on our internal pricing models, is expected to be between $956.00 and $976.00 per note. The estimated value is expected to be less than the initial issue price of the notes. See “The Bank’s Estimated Value of the Notes” in this Pricing Supplement.

* The price to the public for certain investors will be between 98.00% and 100.00% of the face amount, reflecting a foregone agent’s commission with respect to such notes. See “Supplemental Plan of Distribution (Conflicts of Interest)” herein.

The notes are unsecured obligations of Canadian Imperial Bank of Commerce and all payments on the notes are subject to the credit risk of Canadian Imperial Bank of Commerce. The notes will not constitute deposits insured by the Canada Deposit Insurance Corporation, the U.S. Federal Deposit Insurance Corporation or any other government agency or instrumentality of Canada, the United States or any other jurisdiction.

Neither the United States Securities and Exchange Commission (the “SEC”) nor any state or provincial securities commission has approved or disapproved of these securities or determined if this Pricing Supplement or the accompanying Product Supplement No. 6, accompanying General Terms Supplement No. 1, accompanying Prospectus Supplement and accompanying Prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The issue price, agent’s commission and net proceeds listed above relate to the notes we will sell initially.  We may decide to sell additional notes after the date of this Pricing Supplement, at issue prices and with agent’s commissions and net proceeds that differ from the amounts set forth above.  The return (whether positive or negative) on your investment will depend in part on the issue price you pay for your notes.

CIBC World Markets Corp. or one of our other affiliates may use this Pricing Supplement in a market-making transaction in a note after its initial sale. Unless we or our agent informs the purchaser otherwise in the confirmation of sale, this Pricing Supplement is being used in a market-making transaction.

We will deliver the notes in book-entry form through the facilities of The Depository Trust Company (“DTC”) on or about   , 2018 against payment in immediately available funds.

CIBC World Markets

Capped Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

ABOUT THIS PRICING SUPPLEMENT

You should read this Pricing Supplement together with the Prospectus dated March 28, 2017 (the “Prospectus”), the Prospectus Supplement dated March 28, 2017 (the “Prospectus Supplement”), the General Terms Supplement No. 1, dated May 1, 2017 (the “General Terms Supplement”), and the Product Supplement No. 6 (the “Product Supplement No. 6”), dated May 1, 2017, each relating to our Senior Global Medium-Term Notes (Structured Notes), for additional information about the notes. Information in this Pricing Supplement supersedes information in the Product Supplement No. 6, the General Terms Supplement, the Prospectus Supplement and the Prospectus to the extent it is different from that information. Certain defined terms used but not defined herein have the meanings set forth in the Product Supplement No. 6, the General Terms Supplement, the Prospectus Supplement or the Prospectus.

You should rely only on the information contained in or incorporated by reference in this Pricing Supplement, the accompanying Product Supplement No. 6, the accompanying General Terms Supplement, the accompanying Prospectus Supplement and the accompanying Prospectus. This Pricing Supplement may be used only for the purpose for which it has been prepared. No one is authorized to give information other than that contained in this Pricing Supplement, the accompanying Product Supplement No. 6, the accompanying General Terms Supplement, the accompanying Prospectus Supplement and the accompanying Prospectus, and in the documents referred to in this Pricing Supplement, the Product Supplement No. 6, the General Terms Supplement, the Prospectus Supplement and the Prospectus and which are made available to the public. We have not, and CIBC World Markets Corp. (“CIBCWM”) has not, authorized any other person to provide you with different or additional information. If anyone provides you with different or additional information, you should not rely on it.

We are not, and CIBCWM is not, making an offer to sell the notes in any jurisdiction where the offer or sale is not permitted. You should not assume that the information contained in or incorporated by reference in this Pricing Supplement, the accompanying Product Supplement No. 6, the accompanying General Terms Supplement, the accompanying Prospectus Supplement or the accompanying Prospectus is accurate as of any date other than the date of the applicable document. Our business, financial condition, results of operations and prospects may have changed since that date. Neither this Pricing Supplement, nor the accompanying Product Supplement No. 6, nor the accompanying General Terms Supplement, nor the accompanying Prospectus Supplement, nor the accompanying Prospectus constitutes an offer, or an invitation on our behalf or on behalf of CIBCWM, to subscribe for and purchase any of the notes and may not be used for or in connection with an offer or solicitation by anyone in any jurisdiction in which such an offer or solicitation is not authorized or to any person to whom it is unlawful to make such an offer or solicitation.

References to “CIBC,” “the Issuer,” “the Bank,” “we,” “us” and “our” in this Pricing Supplement are references to Canadian Imperial Bank of Commerce and not to any of our subsidiaries, unless we state otherwise or the context otherwise requires.

You may access the Product Supplement No. 6, the General Terms Supplement, the Prospectus Supplement and the Prospectus on the SEC website www.sec.gov as follows (or if such address has changed, by reviewing our filing for the relevant date on the SEC website):

·                  Product Supplement No. 6, dated May 1, 2017:
https://www.sec.gov/Archives/edgar/data/1045520/000110465917028390/a17-10322_19424b2.htm

·                  General Terms Supplement No. 1, dated May 1, 2017:
https://www.sec.gov/Archives/edgar/data/1045520/000110465917028383/a17-10322_18424b2.htm

·                  Prospectus Supplement dated March 28, 2017 and Prospectus dated March 28, 2017 filed with the SEC on March 28, 2017:

https://www.sec.gov/Archives/edgar/data/1045520/000110465917019619/a17-8647_1424b3.htm

PRS-1

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

You should be willing to forgo:

·                  gains greater than a maximum settlement amount of between 118.570% and 121.825% of the face amount in exchange for (i) 1.5x leveraged upside participation if the underlier return is positive and (ii) a buffer against loss of principal in the event of a decline of up to 10.00% in the final underlier level relative to the initial underlier level.

·                  interest payments and be willing to risk losing your entire investment for the potential to earn 150.00% of any positive underlier return up to a maximum settlement amount of between 118.570% and 121.825% of the face amount.

Your maximum return on your notes will not be greater than between 18.570% and 21.825%, and you could lose all or a substantial portion of your investment if the underlier return is less than -10.00%.

At maturity, for each $1,000 face amount, the investor will receive (in each case as a percentage of the face amount):

·                  if the final underlier level is greater than 100.00% of the initial underlier level, 100.00% plus 150.00% times the underlier return, subject to a maximum settlement amount of between 118.570% and 121.825%;

·                  if the final underlier level is between 90.00% and 100.00% of the initial underlier level, 100.00%; or

·                  if the final underlier level is less than 90.00% of the initial underlier level, 100.00% minus approximately 1.1111% for every 1.00% that the final underlier level has declined below 90.00% of the initial underlier level

If the final underlier level declines by more than 10.00% from the initial underlier level, the return on the notes will be negative and the investor could lose their entire investment in the notes.

PRS-2

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

* Assumes a cap level set at the bottom of the cap level range (between 112.38% and 114.55% of the initial underlier level)

Investing in the notes involves significant risks. Please read the section entitled “Additional Risk Factors Specific to Your Notes” in this Pricing Supplement as well as the risks and considerations described under “Additional Risk Factors Specific to the Underlier-Linked Notes” in the accompanying Product Supplement No. 6, under “Additional Risk Factors Specific to the Notes” in the accompanying General Terms Supplement, under “Risk Factors” in the accompanying Prospectus Supplement, and under “Risk Factors” in the accompanying Prospectus.

PRS-3

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

SUMMARY INFORMATION

Key Terms

Issuer: Canadian Imperial Bank of Commerce

Underlier: the S&P MidCap 400® Index (Bloomberg symbol, “MID Index”), as published by S&P Dow Jones Indices LLC (“S&P”)

Specified currency: U.S. dollars (“$”)

Terms to be specified in accordance with the accompanying Product Supplement No. 6:

·                  type of notes: notes linked to a single underlier

·                  exchange rates: not applicable

·                  averaging dates: not applicable

·                  redemption right or price dependent redemption right: not applicable

·                  cap level: yes, as described below

·                  buffer level: yes, as described below

·                  interest: not applicable

Face amount: each note will have a face amount of $1,000; $in the aggregate for all the offered notes; the aggregate face amount of the offered notes may be increased if the Issuer, at its sole option, decides to sell an additional amount of the offered notes on a date subsequent to the date of this Pricing Supplement

Minimum Investment: $1,000 (one note)

Denominations: $1,000 and integral multiples of $1,000 in excess thereof

Purchase at amount other than face amount: the amount we will pay you on the stated maturity date for your notes will not be adjusted based on the issue price you pay for your notes, so if you acquire notes at a premium (or a discount) to face amount and hold them to the stated maturity date, it could affect your investment in a number of ways. The return on your investment in such notes will be lower (or higher) than it would have been had you purchased the notes at face amount. Also, the stated buffer level would not offer the same measure of protection to your investment as would be the case if you had purchased the notes at face amount. Additionally, the cap level would be triggered at a lower (or higher) percentage return than indicated below, relative to your initial investment. See “Additional Risk Factors Specific to Your Notes — If You Purchase Your Notes at a Premium to Face Amount, the Return on Your Investment Will Be Lower Than the Return on Notes Purchased at Face Amount and the Impact of Certain Key Terms of the Notes Will Be Negatively Affected” in this Pricing Supplement.

Cash settlement amount (on the stated maturity date): for each $1,000 face amount of your notes, we will pay you on the stated maturity date an amount in cash equal to:

·                  if the final underlier level is greater than or equal to the cap level, the maximum settlement amount;

·                  if the final underlier level is greater than the initial underlier level but less than the cap level, the

PRS-4

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

sum of (i) $1,000 plus (ii) the product of (a) $1,000 times (b) the upside participation rate times (c) the underlier return;

·                  if the final underlier level is equal to or less than the initial underlier level but greater than or equal to the buffer level, $1,000; or

·                  if the final underlier level is less than the buffer level, the sum of (i) $1,000 plus (ii) the product of (a) the buffer rate times (b) the sum of the underlier return plus the buffer amount times (c) $1,000.

Initial underlier level (set on the trade date and may be higher or lower than the actual closing level of the underlier on that date):

Final underlier level: the closing level of the underlier on the determination date, except in the limited circumstances described under “Supplemental Terms of the Notes — Consequences of a Market Disruption Event or a Non-Trading Day” in the accompanying General Terms Supplement and subject to adjustment as provided under “Supplemental Terms of the Notes — Discontinuance or Modification of an Underlier” in the accompanying General Terms Supplement

Underlier return: the quotient of (1) the final underlier level minus the initial underlier level divided by (2) the initial underlier level, expressed as a positive or negative percentage

Upside participation rate: 150.00%

Cap level (set on the trade date): expected to be between 112.38% and 114.55% of the initial underlier level

Maximum settlement amount (set on the trade date): expected to be between $1,185.70 and $1,218.25

Buffer level: 90.00% of the initial underlier level

Buffer amount: 10.00%

Buffer rate: the quotient of the initial underlier level divided by the buffer level, which equals approximately 111.11%

Trade date:        , 2018

Original issue date (settlement date) (set on the trade date): expected to be the fifth scheduled business day following the trade date

Determination date (set on the trade date): a specified date that is expected to be between 24 and 27 months following the trade date, subject to adjustment as described under “Supplemental Terms of the Notes — Determination Date” in the accompanying General Terms Supplement. Notwithstanding anything to the contrary in the accompanying General Terms Supplement, if the determination date is adjusted as provided under “Supplemental Terms of the Notes — Determination Date” in the accompanying General Terms Supplement, the determination date will not be postponed to a date later than the originally scheduled stated maturity date or, if the originally scheduled stated maturity date is not a business day, later than the first business day after the originally scheduled stated maturity date.

Stated maturity date (set on the trade date): a specified date that is expected to be the second scheduled business day following the determination date, subject to adjustment as described under “Supplemental Terms of the Notes — Stated Maturity Date” in the accompanying General Terms Supplement. Notwithstanding anything to the contrary in the accompanying General Terms Supplement, if the determination date is postponed as provided under “Determination Date” above, the stated maturity date will be postponed by the same number of business day(s) from but excluding the originally scheduled determination date to and including the actual determination date.

No interest: the offered notes do not bear interest

No listing: the offered notes will not be listed on any securities exchange or interdealer quotation system

No redemption: the offered notes will not be subject to redemption right or price dependent redemption

PRS-5

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

right

Closing level: as described under “Supplemental Terms of the Notes — Special Calculation Provisions — Closing Level” in the accompanying General Terms Supplement

Business day: as described under “Supplemental Terms of the Notes — Special Calculation Provisions — Business Day” in the accompanying General Terms Supplement

Trading day: as described under “Supplemental Terms of the Notes — Special Calculation Provisions — Trading Day” in the accompanying General Terms Supplement

Use of proceeds and hedging: as described under “Use of Proceeds” and “Hedging” in the accompanying Product Supplement No. 6

ERISA: as described under “Certain U.S. Benefit Plan Investor Considerations” in the accompanying Product Supplement No. 6

Calculation agent: Canadian Imperial Bank of Commerce. We may appoint a different calculation agent without your consent and without notifying you

CUSIP no.: 13605WKZ3

ISIN no.: US13605WKZ31

Status: The notes will constitute direct, unsubordinated and unsecured obligations of CIBC ranking equally with all other direct, unsecured and unsubordinated indebtedness of CIBC from time to time outstanding (except as otherwise prescribed by law). The notes will not constitute deposits insured by the Canada Deposit Insurance Corporation, the U.S. Federal Deposit Insurance Corporation or any other government agency or instrumentality of Canada, the United States or any other jurisdiction

Clearance and Settlement:  We will issue the notes in the form of a fully registered global note registered in the name of the nominee of DTC. Beneficial interests in the notes will be represented through book-entry accounts of financial institutions acting on behalf of beneficial owners as direct and indirect participants in DTC. Except in the limited circumstances described in the accompanying Prospectus, owners of beneficial interests in the notes will not be entitled to have notes registered in their names, will not receive or be entitled to receive notes in definitive form and will not be considered holders of notes under the indenture

PRS-6

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

HYPOTHETICAL EXAMPLES

The following table and chart are provided for purposes of illustration only. They should not be taken as an indication or prediction of future investment results and merely are intended to illustrate the impact that the various hypothetical underlier levels on the determination date could have on the cash settlement amount at maturity assuming all other variables remain constant.

The examples below are based on a range of final underlier levels that are entirely hypothetical; the underlier level on any day throughout the life of the notes, including the final underlier level on the determination date, cannot be predicted. The underlier has been highly volatile in the past — meaning that the underlier level has changed considerably in relatively short periods — and its performance cannot be predicted for any future period.

The information in the following examples reflects hypothetical rates of return on the offered notes assuming that they are purchased on the original issue date at the face amount and held to the stated maturity date. If you sell your notes in a secondary market prior to the stated maturity date, your return will depend upon the market value of your notes at the time of sale, which may be affected by a number of factors that are not reflected in the table below, such as interest rates, the volatility of the underlier and the creditworthiness of CIBC. In addition, the estimated value of your notes at the time the terms of your notes are set on the trade date (as determined by reference to pricing models used by CIBC) will be less than the original issue price of your notes. For more information on the estimated value of your notes, see “Additional Risk Factors Specific to Your Notes — The Bank’s Estimated Value of the Notes Will Be Lower than the Original Issue Price (Price to Public) of the Notes” in this Pricing Supplement and “The Bank’s Estimated Value of the Notes” in this Pricing Supplement. The information in the following hypothetical examples also reflects the key terms and assumptions in the box below.

Moreover, we have not yet set the initial underlier level that will serve as the baseline for determining the underlier return and the cash settlement amount that we will pay on your notes, if any, at maturity. We will not do so until the trade date. As a result, the actual initial underlier level may differ substantially from the underlier level prior to the trade date and may be higher or lower than the actual closing level of the underlier on that date.

For these reasons, the actual performance of the underlier over the life of your notes, as well as the cash settlement amount payable at maturity, if any, may bear little relation to the hypothetical examples shown below or to the historical underlier levels shown elsewhere in this Pricing Supplement. For information about the historical levels of the underlier during recent periods, see “The Underlier — Historical Closing Levels of the Underlier” below. Before investing in the offered notes, you should consult publicly available information to determine the levels of the underlier between the date of this Pricing Supplement and the date of your purchase of the offered notes.

Also, the hypothetical examples shown below do not take into account the effects of applicable taxes. Because of the U.S. tax treatment applicable to your notes, tax liabilities could affect the after-tax rate of return on your notes to a comparatively greater extent than the after-tax return on the underlier stocks.

PRS-7

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

The levels in the left column of the table below represent hypothetical final underlier levels and are expressed as percentages of the initial underlier level. The amounts in the right column represent the hypothetical cash settlement amounts, based on the corresponding hypothetical final underlier level, and are expressed as percentages of the face amount of a note (rounded to the nearest one-thousandth of a percent). Thus, a hypothetical cash settlement amount of 100.000% means that the value of the cash payment that we would deliver for each $1,000 of the outstanding face amount of the offered notes on the stated maturity date would equal 100.000% of the face amount of a note, based on the corresponding hypothetical final underlier level and the assumptions noted above.

If, for example, the final underlier level were determined to be 25.000% of the initial underlier level, the cash settlement amount that we would deliver on your notes at maturity would be approximately 27.778% of the face amount of your notes, as shown in the table above. As a result, if you purchased your notes on the original issue date at the face amount and held them to the stated maturity date, you would lose approximately 72.222% of your investment (if you purchased your notes at a premium to face amount you would lose a correspondingly higher percentage of your investment). If the final underlier level were determined to be 0.000% of the initial underlier level, you would lose your entire investment in the notes. In addition, if the final underlier level were determined to be 150.000% of the initial underlier level, the cash settlement amount that we would deliver on your notes at maturity would be capped at the maximum settlement amount, or 118.570% of each $1,000 face amount of your notes, as shown in the table above. As a result, if you held your notes to the stated maturity date, you would not benefit from any increase in the final underlier level of greater than 112.380% of the initial underlier level.

PRS-8

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

The following chart shows a graphical illustration of the hypothetical cash settlement amounts that we would pay on your notes on the stated maturity date, if the final underlier level were any of the hypothetical levels shown on the horizontal axis. The hypothetical cash settlement amounts in the chart are expressed as percentages of the face amount of your notes and the hypothetical final underlier levels are expressed as percentages of the initial underlier level. The chart shows that any hypothetical final underlier level of less than 90.000% (the section left of the 90.000% marker on the horizontal axis) would result in a hypothetical cash settlement amount of less than 100.000% of the face amount of your notes (the section below the 100.000% marker on the vertical axis) and, accordingly, in a loss of principal to the holder of the notes. The chart also shows that any hypothetical final underlier level of greater than or equal to 112.380% (the section right of the 112.380% marker on the horizontal axis) would result in a capped return on your investment.

The cash settlement amounts shown above are entirely hypothetical; they are based on market prices for the underlier stocks that may not be achieved on the determination date and on assumptions that may prove to be erroneous. The actual market value of your notes on the stated maturity date or at any other time, including any time you may wish to sell your notes, may bear little relation to the hypothetical cash settlement amounts shown above, and these amounts should not be viewed as an indication of the financial return on an investment in the offered notes. The hypothetical cash settlement amounts on notes held to the stated maturity date in the examples above assume you purchased your notes at their face amount and have not been adjusted to reflect the actual issue price you pay for your notes. The return on your investment (whether positive or negative) in your notes will be affected by the amount you pay for your notes. If you purchase your notes for a price other than the face amount, the return on your investment will differ from, and may be significantly lower than, the hypothetical returns suggested by the above examples. Please read “Additional Risk Factors Specific to the Underlier-Linked Notes — The Market Value of Your Notes May Be Influenced by Many Unpredictable Factors” in the accompanying Product Supplement No. 6.

Payments on the notes are economically equivalent to the amounts that would be paid on a combination of other instruments. For example, payments on the notes are economically equivalent to a combination of an interest-bearing bond bought by the holder and one or more options entered into between the holder and us (with one or more implicit option premiums paid over time). The discussion

PRS-9

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

in this paragraph does not modify or affect the terms of the notes or the U.S. federal income tax treatment of the notes, as described elsewhere in this Pricing Supplement.

PRS-10

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

ADDITIONAL RISK FACTORS SPECIFIC TO YOUR NOTES

The Notes Are Subject to the Credit Risk of the Bank

Although the return on the notes will be based on the performance of the underlier, the payment of any amount due on the notes is subject to the credit risk of the Bank, as issuer of the notes. The notes are our unsecured obligations. As further described in the accompanying Prospectus and Prospectus Supplement, the notes will rank on par with all of the other unsecured and unsubordinated debt obligations of the Bank, except such obligations as may be preferred by operation of law. Investors are dependent on our ability to pay all amounts due on the notes, and therefore investors are subject to our credit risk and to changes in the market’s view of our creditworthiness. See “Description of Senior Debt Securities — Ranking” on page 2 of the accompanying Prospectus.

The Amount Payable on Your Notes Is Not Linked to the Level of the Underlier at Any Time Other than the Determination Date

The final underlier level will be based on the closing level of the underlier on the determination date (subject to adjustment as described elsewhere in this Pricing Supplement). Therefore, if the closing level of the underlier dropped precipitously on the determination date, the cash settlement amount for your notes may be significantly less than it would have been had the cash settlement amount been linked to the closing level of the underlier prior to such drop in the level of the underlier. Although the actual level of the underlier on the stated maturity date or at other times during the life of your notes may be higher than the final underlier level, you will not benefit from the closing level of the underlier at any time other than on the determination date.

You May Lose Your Entire Investment in the Notes

You may lose your entire investment in the notes. The cash payment on your notes, if any, on the stated maturity date will be based on the performance of the S&P MidCap 400® Index as measured from the initial underlier level set on the trade date (which could be higher or lower than the actual closing level of the underlier on that date) to the closing level on the determination date. If the final underlier level is less than the buffer level, you will lose, for each $1,000 of the face amount of your notes, an amount equal to the product of (i) the buffer rate times (ii) the sum of the underlier return plus the buffer amount times (iii) $1,000. Thus, you may lose your entire investment in the notes, which would include any premium to face amount you paid when you purchased the notes.

Also, the market price of your notes prior to the stated maturity date may be significantly lower than the purchase price you pay for your notes. Consequently, if you sell your notes before the stated maturity date, you may receive significantly less than the amount of your investment in the notes.

Your Notes Do Not Bear Interest

You will not receive any interest payments on your notes. As a result, even if the cash settlement amount payable for your notes on the stated maturity date exceeds the face amount of your notes, the overall return you earn on your notes may be less than you would have earned by investing in a non-index-linked debt security of comparable maturity that bears interest at a prevailing market rate.

PRS-11

Leveraged Buffered S&P MidCap 400® Index-Linked Notes due

The Potential for the Value of Your Notes to Increase Will Be Limited by the Maximum Settlement Amount

Your ability to participate in any change in the value of the underlier over the life of your notes will be limited because of the cap level. The maximum settlement amount will limit the cash settlement amount you may receive for each of your notes at maturity, no matter how much the level of the underlier may rise beyond the cap level over the life of your notes. Accordingly, the amount payable for each of your notes may be significantly less than it would have been had you invested directly in the underlier.

The Notes Will Not Be Listed on Any Securities Exchange and We Do Not Expect A Trading Market For the Notes to Develop

The notes will not be listed or displayed on any securities exchange or any automated quotation system. Although CIBCWM and/or its affiliates may purchase the notes from holders, they are not obligated to do so and are not required to make a market for the notes. There can be no assurance that a secondary market will develop for the notes. Because we do not expect that any market makers will participate in a secondary market for the notes, the price at which you may be able to sell your notes is likely to depend on the price, if any, at which CIBCWM and/or its affiliates are willing to buy your notes.

If a secondary market does exist, it may be limited. Accordingly, there may be a limited number of buyers if you decide to sell your notes prior to the stated maturity date. This may affect the price you receive upon such sale. Consequently, you should be willing to hold the notes to the stated maturity date.

The Historical Performance of the Underlier Should Not Be Taken as an Indication of Its Future Performance

The final level of the underlier will determine the amount to be paid on the notes at maturity. The historical performance of the underlier does not necessarily give an indication of its future performance. As a result, it is impossible to predict whether the level of the underlier will rise or fall during the term of the notes. The level of the underlier will be influenced by complex and interrelated political, economic, financial and other factors.

You Have No Shareholder Rights or Rights to Receive Any Underlier Stock

Investing in the notes will not make you a holder of any of the underlier stocks. Neither you nor any other holder or owner of the notes will have any rights with respect to the underlier stocks, including any voting rights, any right to receive dividends or other distributions, any rights to make a claim against the underlier stocks or any other rights of a holder of the underlier stocks. Your notes will be paid in cash and you will have no right to receive delivery of any underlier stocks.

We May Sell an Additional Aggregate Face Amount of the Notes at a Different Issue Price

At our sole option, we may decide to sell an additional aggregate face amount of the notes subsequent to the date of this Pricing Supplement. The issue price of the notes in the subsequent sale may differ substantially (higher or lower) from the original issue price you paid as provided on the cover of this Pricing Supplement.

If You Purchase Your Notes at a Premium to Face Amount, the Return on Your Investment Will Be Lower Than the Return on Notes Purchased at Face Amount and the Impact of Certain Key Terms of the Notes Will Be Negatively Affected

The cash settlement amount will not be adjusted based on the issue price you pay for the notes. If you purchase notes at a price that differs from the face amount of the notes, then the return on your investment in such notes held to the stated maturity date will differ from, and may be substantially less than, the return on notes purchased at face amount. If you purchase your notes at a premium to face amount and hold them to the stated maturity date, the return on your investment in the notes will be lower than it would have been had you purchased the notes at face amount or a discount to face amount. In addition, the impact of the buffer level and the cap level on the return on your investment will depend upon the price you pay for your notes relative to face amount. For example, if you purchase your notes at a premium to face amount, the cap level will only permit a lower positive return on your investment in the notes than would have been the case for notes purchased at face amount or a

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discount to face amount. Similarly, the buffer level, while still providing some protection for the return on the notes, will allow a greater percentage decrease in your investment in the notes than would have been the case for notes purchased at face amount or a discount to face amount.

There Are Potential Conflicts of Interest Between You and the Calculation Agent

The calculation agent will, among other things, determine the cash settlement amount payable at maturity of the notes. We will serve as the calculation agent. We may appoint a different calculation agent without your consent and without notifying you. The calculation agent will exercise its judgment when performing its functions. For example, the calculation agent may have to determine whether a market disruption event affecting the underlier has occurred. This determination may, in turn, depend on the calculation agent’s judgment as to whether the event has materially interfered with our ability or the ability of one of our affiliates or a similarly situated party to unwind our hedge positions. Since this determination by the calculation agent will affect the payment at maturity on the notes, the calculation agent may have a conflict of interest if it needs to make a determination of this kind. See “General Terms of the Underlier-Linked Notes — Role of Calculation Agent” in the accompanying Product Supplement No. 6.

The Inclusion of Dealer Spread and Projected Profit from Hedging in the Original Issue Price Is Likely to Adversely Affect Secondary Market Prices

Assuming no change in market conditions or any other relevant factors, the price, if any, at which CIBCWM or any other party is willing to purchase the notes at any time in secondary market transactions will likely be significantly lower than the original issue price, since secondary market prices are likely to exclude underwriting commissions paid with respect to the notes and the cost of hedging our obligations under the notes that are included in the original issue price. The cost of hedging includes the projected profit that we, our affiliates or any third-party who may conduct hedging activities related to the notes, including any dealer in the notes, may realize in consideration for assuming the risks inherent in managing the hedging transactions. These secondary market prices are also likely to be reduced by the costs of unwinding the related hedging transactions. In addition, any secondary market prices may differ from values determined by pricing models used by CIBCWM as a result of dealer discounts, mark-ups or other transaction costs. Furthermore, if the dealer from which you purchase notes is to conduct trading and hedging activities for us in connection with the notes, that dealer may profit in connection with such trading and hedging activities and such profit, if any, will be in addition to the compensation that the dealer receives for the sale of the notes to you. You should be aware that the potential to earn a profit in connection with hedging activities may create a further incentive for the dealer to sell the notes to you, in addition to the compensation they would receive for the sale of the notes.

The Bank’s Estimated Value of the Notes Will Be Lower than the Original Issue Price (Price to Public) of the Notes

The Bank’s estimated value is only an estimate using several factors. The original issue price of the notes is expected to exceed the Bank’s estimated value because costs associated with selling and structuring the notes, as well as hedging the notes, are included in the original issue price of the notes. See “The Bank’s Estimated Value of the Notes” in this Pricing Supplement.

The Bank’s Estimated Value Does Not Represent Future Values of the Notes and May Differ from Others’ Estimates

The Bank’s estimated value of the notes is determined by reference to the Bank’s internal pricing models when the terms of the notes are set. This estimated value is based on market conditions and other relevant factors existing at that time and the Bank’s assumptions about market parameters, which can include volatility, dividend rates, interest rates and other factors. Different pricing models and assumptions could provide valuations for the notes that are greater than or less than the Bank’s estimated value. In addition, market conditions and other relevant factors in the future may change, and any assumptions may prove to be incorrect. On future dates, the value of the notes could change significantly based on, among other things, changes in market conditions, our creditworthiness, interest rate movements and other relevant factors, which may impact the price, if any, at which CIBCWM or any other person would be willing to buy notes from you in secondary market transactions. See “The Bank’s Estimated Value of the Notes” in this Pricing Supplement.

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The Bank’s Estimated Value Is Not Determined by Reference to Credit Spreads for Our Conventional Fixed-Rate Debt

The internal funding rate used in the determination of the Bank’s estimated value generally represents a discount from the credit spreads for our conventional fixed-rate debt. If the Bank were to use the interest rate implied by our conventional fixed-rate credit spreads, we would expect the economic terms of the notes to be more favorable to you. Consequently, our use of an internal funding rate would have an adverse effect on the terms of the notes and any secondary market prices of the notes. See “The Bank’s Estimated Value of the Notes” in this Pricing Supplement.

We Cannot Control Actions By Any of the Unaffiliated Companies Whose Securities Are Included in the Underlier

Actions by any company whose securities are included in the underlier may have an adverse effect on the price of its security, the final underlier level and the value of the notes. These companies will not be involved in the offering of the notes and will have no obligations with respect to the notes, including any obligation to take our or your interests into consideration for any reason. These companies will not receive any of the proceeds of the offering of the notes and will not be responsible for, and will not have participated in, the determination of the timing of, prices for, or quantities of, the notes to be issued. These companies will not be involved with the administration, marketing or trading of the notes and will have no obligations with respect to the cash settlement amount to be paid to you at maturity.

We and Our Respective Affiliates Have No Affiliation with the Underlier Sponsor and Have Not Independently Verified Its Public Disclosure of Information

We and our respective affiliates are not affiliated in any way with the underlier sponsor and have no ability to control or predict its actions, including any errors in or discontinuation of disclosure regarding the methods or policies relating to the calculation of the underlier. We have derived the information about the underlier sponsor and the underlier contained herein from publicly available information, without independent verification. You, as an investor in the notes, should make your own investigation into the underlier and the underlier sponsor. The underlier sponsor is not involved in the offering of the notes made hereby in any way and has no obligation to consider your interest as an owner of notes in taking any actions that might affect the value of the notes.

The U.S. Federal Tax Consequences of An Investment in the Notes Are Unclear

There is no direct legal authority regarding the proper U.S. federal tax treatment of the notes, and we do not plan to request a ruling from the U.S. Internal Revenue Service (the “IRS”). Consequently, significant aspects of the tax treatment of the notes are uncertain, and the IRS or a court might not agree with the treatment of the notes as prepaid cash-settled derivative contracts. If the IRS were successful in asserting an alternative treatment of the notes, the tax consequences of the ownership and disposition of the notes might be materially and adversely affected. The U.S. Treasury Department and the IRS released a notice requesting comments on various issues regarding the U.S. federal income tax treatment of “prepaid forward contracts” and similar instruments.  See “Supplemental Discussion of U.S. Federal Income Tax Consequences” in the accompanying Product Supplement No. 6.  Any Treasury regulations or other guidance promulgated after consideration of these issues could materially and adversely affect the tax consequences of an investment in the notes, including the character and timing of income or loss and the degree, if any, to which income realized by non-U.S. persons should be subject to withholding tax, possibly with retroactive effect. Both U.S. and non-U.S. persons considering an investment in the notes should review carefully the section of the accompanying Product Supplement No. 6 entitled “Supplemental Discussion of U.S. Federal Income Tax Consequences” and consult their tax advisers regarding the U.S. federal tax consequences of an investment in the notes (including possible alternative treatments and the issues presented by the notice), as well as tax consequences arising under the laws of any state, local or non-U.S. taxing jurisdiction.

There Can Be No Assurance that the Canadian Federal Income Tax Consequences of an Investment in the Notes Will Not Change in the Future

There can be no assurance that Canadian federal income tax laws, the judicial interpretation thereof, or

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the administrative policies and assessing practices of the Canada Revenue Agency will not be changed in a manner that adversely affects investors. For a discussion of the Canadian federal income tax consequences of investing in the notes, please read the section of this Pricing Supplement entitled  “Certain Canadian Federal Income Tax Considerations” as well as the section entitled “Material Income Tax Consequences — Canadian Taxation” in the accompanying Prospectus. You should consult your tax advisor with respect to your own particular situation.

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THE UNDERLIER

The S&P MidCap 400® Index (the “underlier”) includes a sample of 400 mid-sized companies in various industries of the U.S. economy. S&P chooses companies for inclusion in the S&P MidCap 400® Index with an aim of achieving a distribution by broad industry groupings that approximates the distribution of these groupings in the population of mid-size companies in the U.S. equity market. Although the S&P MidCap 400® Index contains 400 constituent companies, at any one time it may contain greater than 400 constituent trading lines since some companies included in the underlier prior to July 31, 2017 may be represented by multiple share class lines in the underlier. The S&P MidCap 400® Index is calculated, maintained and published by S&P and is part of the S&P Dow Jones Indices family of indices. Additional information is available on the following websites: spindices.com/indices/equity/sp-400 and spdji.com/. We are not incorporating by reference the websites or any material they include in this Pricing Supplement.

The S&P MidCap 400® Index is intended to reflect the risk and return characteristics of the broader universe of mid-sized firms in the U.S. equity markets. Constituent changes are made on an as-needed basis and there is no schedule for constituent reviews. Constituent changes are generally announced one to five business days prior to the change. Relevant criteria for additions to the S&P MidCap 400® Index that are employed by S&P include: the company proposed for addition has an unadjusted company market capitalization of between $1.6 billion and $6.8 billion (but the constituents are not the 400 largest companies in the NYSE in that range and not all 400 companies are listed on such exchange; for spin-offs, eligibility is determined using when-issued prices, if available); using composite pricing and volume, the ratio of annual dollar value traded in the proposed constituent to float-adjusted market capitalization of that company should be 1.00 or greater and the stock should trade a minimum of 250,000 shares in each of the six months leading up to the evaluation date; the company must be a U.S. company (characterized as a Form 10-K filer with its U.S. portion of fixed assets and revenues constituting a plurality of the total and with a primary listing of the common stock on the NYSE, NYSE Arca, NYSE American (formerly NYSE MKT), NASDAQ Global Select Market, NASDAQ Select Market, NASDAQ Capital Market, Bats BZX, Bats BYX, Bats EDGA, Bats EDGX or IEX (each, an “eligible exchange”)), the proposed constituent has a public float of 50% or more of its stock, the inclusion of the company will contribute to sector balance in the underlier relative to the sector balance in the market in the relevant market capitalization range; financial viability (the sum of the most recent four consecutive quarters’ Generally Accepted Accounting Principles (GAAP) earnings (net income excluding discontinued operations) should be positive as should the most recent quarter; and, for IPOs, the company must be traded on an eligible exchange for at least twelve months. In addition, constituents of the S&P 500 Index and the S&P SmallCap 600 Index can be migrated to the underlier without meeting the financial viability, public float and/or liquidity eligibility criteria if the S&P Index Committee decides that such a move will enhance the representativeness of the S&P MidCap 400® Index as a market benchmark. Certain types of organizational structures and securities are always excluded, including business development companies (“BDCs”), limited partnerships, master limited partnerships, limited liability companies (“LLCs”) OTC bulletin board issues, closed-end funds, ETFs, ETNs, royalty trusts, tracking stocks, preferred stock and convertible preferred stock, unit trusts, equity warrants, convertible bonds, investment trusts, rights and American depositary receipts (“ADRs”). Stocks are deleted from the S&P MidCap 400® Index when they are involved in mergers, acquisitions or significant restructurings such that they no longer meet the inclusion criteria, and when they substantially violate one or more of the addition criteria. Stocks that are delisted or moved to the pink sheets or bulletin board are removed and those that experience a trading halt may be retained or removed in S&P’s discretion. S&P evaluates additions and deletions with a view to maintaining S&P MidCap 400® Index continuity.

For constituents included in the underlier prior to July 31, 2017, all publicly listed multiple share class lines are included separately in the S&P MidCap 400® Index, subject to, in the case of any such share class line, that share class line satisfying the liquidity and float criteria discussed above and subject to certain exceptions. It is possible that one listed share class line of a company may be included in the S&P MidCap 400® Index while a second listed share class line of the same company is excluded. For companies that issue a second publicly traded share class to index share class holders, the newly issued share class line is considered for inclusion if the event is mandatory and the market capitalization of the

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distributed class is not considered to be de minimis.

As of July 31, 2017, companies with multiple share class lines are no longer eligible for inclusion in the underlier. Constituents of the underlier prior to July 31, 2017 with multiple share class lines will be grandfathered in and continue to be included in the underlier. If a constituent company of the underlier reorganizes into a multiple share class line structure, that company will remain in the underlier at the discretion of the S&P Index Committee in order to minimize turnover.

As of March 29, 2018, the top ten component stocks of the S&P MidCap 400® Index, by weight, were: MSCI Inc, Broadridge Financial Solution Inc, Abiomed Inc, Teleflex Inc, IDEX Corp, Steel Dynamics Inc, Copart Inc, Domino’s Pizza Inc, Old Dominion Freight Line Inc and Keysight Technologies Inc.

As of March 29, 2018, the 400 companies included in the S&P MidCap 400® Index were divided into eleven Global Industry Classification Sectors. The Global Industry Classification Sectors include (with the approximate percentage currently included in such sectors indicated in parentheses; such percentages may not sum to 100% due to rounding): Consumer Discretionary (12.0%), Consumer Staples (3.4%), Energy (4.3%), Financials (17.8%), Health Care (8.1%), Industrials (15.5%), Information Technology (17.5%), Materials (7.0%), Real Estate (8.8%), Telecommunication Services (0.2%) and Utilities (5.4%). (Sector designations are determined by the underlier sponsor using criteria it has selected or developed. Index sponsors may use very different standards for determining sector designations. In addition, many companies operate in a number of sectors, but are listed in only one sector and the basis on which that sector is selected may also differ. As a result, sector comparisons between indices with different index sponsors may reflect differences in methodology as well as actual differences in the sector composition of the indices.) S&P and MSCI, Inc. have announced that the Global Industry Classification Sector structure is expected to be updated after the close of business on September 28, 2018. Among other things, the update is expected to broaden the current Telecommunication Services sector and rename it the Communication Services sector. The renamed sector is expected to include the existing telecommunication companies, as well as companies selected from the Consumer Discretionary sector currently classified under the Media industry group and the Internet & Direct Marketing Retail sub-industry, along with select companies currently classified in the Information Technology sector. Further, companies that operate online marketplaces for consumer products and services are expected to be included under the Internet & Direct Marketing sub-industry of the Consumer Discretionary sector, regardless of whether they hold inventory.

Calculation of the S&P MidCap 400® Index

The S&P MidCap 400® Index is calculated using a base-weighted aggregative methodology. The value of the S&P MidCap 400® Index on any day for which an underlier value is published is determined by a fraction, the numerator of which is the aggregate of the market price of each stock in the S&P MidCap 400® Index times the number of shares of such stock included in the S&P MidCap 400® Index and the denominator of which is the divisor, which is described more fully below. The “market value” of any underlier stock is the product of the market price per share of that stock times the number of the then-outstanding shares of such underlier stock that are then included in the S&P MidCap 400® Index.

The S&P MidCap 400® Index is also sometimes called a “base-weighted aggregative index” because of its use of a divisor. The “divisor” is a value calculated by S&P that is intended to maintain conformity in underlier values over time and is adjusted for all changes in the underlier stocks’ share capital after the “base date” as described below. The level of the S&P MidCap 400® Index reflects the total market value of all underlier stocks relative to the underlier’s base date of June 28, 1991.

In addition, the S&P MidCap 400® Index is float-adjusted, meaning that the share counts used in calculating the S&P MidCap 400® Index reflect only those shares available to investors rather than all of a company’s outstanding shares. S&P seeks to exclude shares held by certain shareholders concerned with the control of a company, a group that generally includes the following: officers and directors and related individuals whose holdings are publicly disclosed, private equity, venture capital, special equity firms, publicly traded companies that hold shares for control in another company, strategic partners,

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holders of restricted shares, employee stock ownership plans, employee and family trusts, foundations associated with the company, holders of unlisted share classes of stock, government entities at all levels (except government retirement or pension funds) and any individual person listed as a 5% or greater stakeholder in a company as reported in regulatory filings (collectively, “control holders”). To this end, S&P excludes all share-holdings (other than depositary banks, pension funds, mutual funds, exchange traded fund providers, 401(k) plans of the company, government retirement and pension funds, investment funds of insurance companies, asset managers and investment funds, independent foundations, savings plans and investment plans) with a position greater than 5% of the outstanding shares of a company from the float-adjusted share count to be used in S&P MidCap 400® Index calculations.

The exclusion is accomplished by calculating an Investable Weight Factor (“IWF”) for each stock that is part of the numerator of the float-adjusted underlier fraction described above:

IWF = (available float shares)/(total shares outstanding)

where available float shares is defined as total shares outstanding less shares held by control holders. In most cases, an IWF is reported to the nearest one percentage point. For companies with multiple share class lines, a separate IWF is calculated for each share class line.

Maintenance of the S&P MidCap 400® Index

In order to keep the S&P MidCap 400® Index comparable over time S&P engages in an underlier maintenance process. The S&P MidCap 400® Index maintenance process involves changing the constituents as discussed above, and also involves maintaining quality assurance processes and procedures, adjusting the number of shares used to calculate the S&P MidCap 400® Index, monitoring and completing the adjustments for company additions and deletions, adjusting for stock splits and stock dividends and adjusting for other corporate actions. In addition to its daily governance of indices and maintenance of the underlier methodology, at least once within any 12 month period, the S&P Index Committee reviews the underlier methodology to ensure the S&P MidCap 400® Index continues to achieve the stated objective, and that the data and methodology remain effective. The S&P Index Committee may at times consult with investors, market participants, security issuers included or potentially included in the S&P MidCap 400® Index, or investment and financial experts.

Divisor Adjustments

The two types of adjustments primarily used by S&P are divisor adjustments and adjustments to the number of shares (including float adjustments) used to calculate the S&P MidCap 400® Index. Set forth below is a table of certain corporate events and their resulting effect on the divisor and the share count. If a corporate event requires an adjustment to the divisor, that event has the effect of altering the market value of the affected underlier stock and consequently of altering the aggregate market value of the underlier stocks following the event. In order that the level of the S&P MidCap 400® Index not be affected by the altered market value (which could be an increase or decrease) of the affected underlier stock, S&P generally derives a new divisor by dividing the post-event market value of the underlier stocks by the pre-event underlier value, which has the effect of reducing the S&P MidCap 400® Index’s post-event value to the pre-event level.

Changes to the Number of Shares of a Constituent

The underlier maintenance process also involves tracking the changes in the number of shares included for each of the underlier companies. The timing of adjustments to the number of shares depends on the type of event causing the change, and whether the change represents 5% or more of the total share count (for companies with multiple share class lines, the 5% threshold is based on each individual share class line rather than total company shares). Changes as a result of mergers or acquisitions are implemented when the transaction occurs. At S&P’s discretion, however, de minimis merger and acquisition changes may be accumulated and implemented with the updates made at the quarterly share updates as described below. Changes in a constituent’s total shares of 5% or more due to public offerings (which must be underwritten, have a publicly available prospectus or prospectus summary filed with the

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Securities and Exchange Commission and include a public confirmation that the offering has been completed) are implemented as soon as reasonably possible. Other changes of 5% or more are made weekly and are announced on Fridays for implementation after the close of trading on the following Friday. For changes of less than 5%, on the third Friday of the last month in each calendar quarter, S&P updates the share totals of companies in the S&P MidCap 400® Index as required by any changes in the number of shares outstanding. S&P implements a share / IWF freeze beginning after the market close on the Tuesday preceding the second Friday of each quarterly rebalancing month and ending after the market close on the third Friday of the quarterly rebalancing month. During this frozen period, shares and IWFs are not changed except for certain corporate action events (merger activity, stock splits and rights offerings).

Adjustments for Corporate Actions

There is a large range of corporate actions that may affect companies included in the S&P MidCap 400® Index. Certain corporate actions require S&P to recalculate the share count or the float adjustment or to make an adjustment to the divisor to prevent the value of the S&P MidCap 400® Index from changing as a result of the corporate action. This helps ensure that the movement of the S&P MidCap 400® Index does not reflect the corporate actions of individual companies in the S&P MidCap 400® Index.

Spin-Offs

As a general policy, a spin-off security is added to the S&P MidCap 400® Index at a zero price at the market close of the day before the ex-date (with no divisor adjustment). The spin-off security will remain in the S&P MidCap 400® Index if it meets all eligibility criteria. If the spin-off security is determined ineligible to remain in the S&P MidCap 400® Index, it will generally be removed after at least one day of regular way trading (with a divisor adjustment). If there is a gap between the ex-date and distribution date (or payable date), or if the spin-off security does not trade regular way on the ex-date, the spin-off security is kept in the S&P MidCap 400® Index until the spin-off security begins trading regular way.

Several additional types of corporate actions, and their related adjustments, are listed in the table below.

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Recalculation Policy

S&P reserves the right to recalculate and republish the S&P MidCap 400® Index at its discretion in the event one of the following issues has occurred: (1) incorrect or revised closing price of one or more constituent securities; (2) missed corporate event; (3) incorrect application of corporate action or index methodology; (4) late announcement of a corporate event; or (5) incorrect calculation or data entry error. The decision to recalculate the S&P MidCap 400® Index is made at the discretion of the index manager and/or index committee, as further discussed below. The potential market impact or disruption resulting from the potential recalculation is considered when making any such decision. In the event of an incorrect closing price, a missed corporate event or a misapplied corporate action, a late announcement of a corporate event, or an incorrect calculation or data entry error that is discovered within two trading days of its occurrence, the index manager may, at his or her discretion, recalculate the S&P MidCap 400® Index without involving the index committee. In the event any such event is discovered beyond the two trading day period, the index committee shall decide whether the S&P MidCap 400® Index should be recalculated. In the event of an incorrect application of the methodology that results in the incorrect composition and/or weighting of index constituents, the index committee shall determine whether or not to recalculate the S&P MidCap 400® Index following specified guidelines. In the event that the S&P MidCap 400® Index is recalculated, it shall be done within a reasonable timeframe following the detection and review of the issue.

Calculations and Pricing Disruptions

Closing levels for the S&P MidCap 400® Index are calculated by S&P based on the closing price of the individual constituents of the underlier as set by their primary exchange. Closing prices are received by S&P from one of its third party vendors and verified by comparing them with prices from an alternative vendor. The vendors receive the closing price from the primary exchanges. Real-time intraday prices are calculated similarly without a second verification. Prices used for the calculation of real time index values are based on the “Consolidated Tape”. The Consolidated Tape is an aggregation of trades for each constituent over all regional exchanges and trading venues and includes the primary exchange. If there is a failure or interruption on one or more exchanges, real-time calculations will continue as long as the “Consolidated Tape” is operational.

If an interruption is not resolved prior to the market close, official closing prices will be determined by following the hierarchy set out in NYSE Rule 123C. A notice is published on the S&P website at spdji.com indicating any changes to the prices used in S&P MidCap 400® Index calculations. In extreme circumstances, S&P may decide to delay underlier adjustments or not publish the S&P MidCap 400® Index. Real-time indices are not restated.

Unexpected Exchange Closures

An unexpected market/exchange closure occurs when a market/exchange fully or partially fails to open or trading is temporarily halted. This can apply to a single exchange or to a market as a whole, when all of the primary exchanges are closed and/or not trading. Unexpected market/exchange closures are usually due to unforeseen circumstances, such as natural disasters, inclement weather, outages, or other events.

To a large degree, S&P is dependent on the exchanges to provide guidance in the event of an unexpected exchange closure. S&P’s decision making is dependent on exchange guidance regarding pricing and mandatory corporate actions.

NYSE Rule 123C provides closing contingency procedures for determining an official closing price for listed securities if the exchange is unable to conduct a closing transaction in one or more securities due to a system or technical issue.

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3:00 PM ET is the deadline for an exchange to determine its plan of action regarding an outage scenario. As such, S&P also uses 3:00 PM ET as the cutoff.

If all major exchanges fail to open or unexpectedly halt trading intraday due to unforeseen circumstances, S&P will take the following actions:

License Agreement

We and S&P have entered into a non-transferable, non-exclusive license agreement providing for the sublicense to us, in exchange for a fee, of the right to use the S&P MidCap 400® Index in connection with the issuance of the notes.

The S&P MidCap 400® Index is a product of S&P Dow Jones Indices LLC (“SPDJI”), and has been licensed for use by CIBC. Standard & Poor’s®, S&P® and S&P 400® are registered trademarks of Standard & Poor’s Financial Services LLC; Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC (“Dow Jones”); and these trademarks have been licensed for use by for use by SPDJI and sublicensed for certain purposes by CIBC. The notes are not sponsored, endorsed, sold or promoted by SPDJI, Dow Jones, Standard & Poor’s Financial Services LLC, or their respective affiliates, and none of such parties make any representation regarding the advisability of investing in the notes nor do they have any liability for any errors, omissions, or interruptions of the S&P 400® Index. S&P Dow Jones Indices makes no representation or warranty, express or implied, to the owners of the notes or any member of the public regarding the advisability of investing in securities generally or in the notes particularly or the ability of the S&P MidCap 400® Index to track general market performance. S&P Dow Jones Indices’ only relationship to CIBC with respect to the S&P MidCap 400® Index is the licensing of the S&P MidCap 400® Index and certain trademarks, service marks and/or trade names of S&P Dow Jones Indices and/or its licensors. The S&P MidCap 400® Index is determined, composed and calculated by S&P Dow Jones Indices without regard to CIBC or the notes. S&P Dow Jones Indices have no obligation to take the needs of CIBC or the owners of the notes into consideration in determining, composing or calculating the S&P MidCap 400® Index. S&P Dow Jones Indices are not responsible for and have not participated in the determination of the prices, and amount of the notes or the timing of the issuance or sale of the notes or in the determination or calculation of the equation by which the notes are to be converted into cash. S&P Dow Jones Indices have no obligation or liability in connection with the administration, marketing or trading of the notes. There is no assurance that investment products based on the S&P MidCap 400® Index will accurately track underlier performance or provide positive investment returns. S&P Dow Jones Indices LLC is not an investment advisor. Inclusion of a security within an index is not a recommendation by S&P Dow Jones Indices to buy, sell, or hold such security, nor is it considered to be investment advice.

S&P DOW JONES INDICES DOES NOT GUARANTEE THE ADEQUACY, ACCURACY, TIMELINESS AND/OR THE COMPLETENESS OF THE S&P MidCap 400® INDEX OR ANY DATA RELATED THERETO OR ANY COMMUNICATION, INCLUDING BUT NOT LIMITED TO ORAL OR WRITTEN COMMUNICATION (INCLUDING ELECTRONIC COMMUNICATIONS) WITH RESPECT THERETO. S&P DOW JONES INDICES SHALL NOT BE SUBJECT TO ANY DAMAGES OR LIABILITY FOR ANY ERRORS, OMISSIONS, OR DELAYS THEREIN. S&P DOW JONES INDICES MAKE NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES, OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE OR AS TO RESULTS TO BE OBTAINED BY CIBC, OWNERS OF THE NOTES, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE S&P MidCap 400® INDEX OR WITH RESPECT TO ANY DATA RELATED THERETO. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT WHATSOEVER SHALL S&P DOW JONES INDICES BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES, INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS, TRADING LOSSES, LOST TIME OR GOODWILL, EVEN IF THEY HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, WHETHER IN CONTRACT, TORT, STRICT LIABILITY, OR OTHERWISE. THERE ARE NO THIRD PARTY BENEFICIARIES OF ANY AGREEMENTS OR ARRANGEMENTS BETWEEN S&P DOW JONES INDICES AND CIBC, OTHER THAN THE LICENSORS OF S&P DOW JONES INDICES.

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Historical Closing Levels of the Underlier

The closing level of the underlier has fluctuated in the past and may, in the future, experience significant fluctuations. Any historical upward or downward trend in the closing level of the underlier during the period shown below is not an indication that the underlier is more or less likely to increase or decrease at any time during the life of your notes.

You should not take the historical levels of the underlier as an indication of the future performance of the underlier. We cannot give you any assurance that the future performance of the underlier or the underlier stocks will result in your receiving an amount greater than the outstanding face amount of your notes on the stated maturity date.

Neither we nor any of our affiliates make any representation to you as to the performance of the underlier. Before investing in the offered notes, you should consult publicly available information to determine the levels of the underlier between the date of this Pricing Supplement and the date of your purchase of the offered notes. The actual performance of the underlier over the life of the offered notes, as well as the cash settlement amount, may bear little relation to the historical closing levels shown below.

The graph below shows the daily historical closing levels of the underlier from May 1, 2008 through May 1, 2018. We obtained the closing levels in the graph below from Bloomberg Financial Services, without independent verification.

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THE BANK’S ESTIMATED VALUE OF THE NOTES

The Bank’s estimated value of the notes set forth on the cover of this Pricing Supplement is equal to the sum of the values of the following hypothetical components: (1) a fixed-income debt component with the same maturity as the notes, valued using our internal funding rate for structured debt described below, and (2) the derivative or derivatives underlying the economic terms of the notes. The Bank’s estimated value does not represent a minimum price at which CIBCWM or any other person would be willing to buy your notes in any secondary market (if any exists) at any time. The internal funding rate used in the determination of the Bank’s estimated value generally represents a discount from the credit spreads for our conventional fixed-rate debt. The discount is based on, among other things, our view of the funding value of the notes as well as the higher issuance, operational and ongoing liability management costs of the notes in comparison to those costs for our conventional fixed-rate debt. For additional information, see “Additional Risk Factors Specific to Your Notes — The Bank’s Estimated Value Is Not Determined by Reference to Credit Spreads for Our Conventional Fixed-Rate Debt” in this Pricing Supplement. The value of the derivative or derivatives underlying the economic terms of the notes is derived from the Bank’s or a third party hedge provider’s internal pricing models. These models are dependent on inputs such as the traded market prices of comparable derivative instruments and on various other inputs, some of which are market-observable, and which can include volatility, dividend rates, interest rates and other factors, as well as assumptions about future market events and/or environments. Accordingly, the Bank’s estimated value of the notes is determined when the terms of the notes are set based on market conditions and other relevant factors and assumptions existing at that time. See “Additional Risk Factors Specific to Your Notes — The Bank’s Estimated Value Does Not Represent Future Values of the Notes and May Differ from Others’ Estimates” in this Pricing Supplement.

The Bank’s estimated value of the notes will be lower than the original issue price of the notes because costs associated with selling, structuring and hedging the notes are included in the original issue price of the notes. These costs include the selling commissions paid to the Bank and other affiliated or unaffiliated dealers, the projected profits that our hedge counterparties, which may include our affiliates, expect to realize for assuming risks inherent in hedging our obligations under the notes and the estimated cost of hedging our obligations under the notes. Because hedging our obligations entails risk and may be influenced by market forces beyond our control, this hedging may result in a profit that is more or less than expected, or it may result in a loss. We or one or more of our affiliates will retain any profits realized in hedging our obligations under the notes. See “Additional Risk Factors Specific to Your Notes — The Bank’s Estimated Value of the Notes Will Be Lower Than the Original Issue Price (Price to Public) of the Notes” in this Pricing Supplement.

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SUPPLEMENTAL PLAN OF DISTRIBUTION (CONFLICTS OF INTEREST)

Pursuant to the terms of a distribution agreement, the Bank expects to agree to sell to CIBCWM, and CIBCWM expects to agree to purchase from the Bank, the aggregate face amount of the offered notes specified on the front cover of this Pricing Supplement. CIBCWM proposes initially to offer the notes to the public at the price to public set forth on the cover page of this Pricing Supplement, and to certain unaffiliated securities dealers at such price less a concession not in excess of 2.00% of the face amount. The price to the public for notes purchased by certain fee-based advisory accounts will be between 98.00% and 100.00% of the face amount, which reflects a foregone agent’s commission with respect to such notes (i.e., the agent’s commission specified on the cover of this Pricing Supplement with respect to such notes is 0.00%).

The Bank owns, directly or indirectly, all of the outstanding equity securities of CIBCWM. In accordance with FINRA Rule 5121, CIBCWM may not make sales in this offering to any of its discretionary accounts without the prior written approval of the customer.

We expect to deliver the notes against payment therefor in New York, New York on     , 2018, which is expected to be the fifth scheduled business day following the date of this Pricing Supplement and of the pricing of the notes. Under Rule 15c6-1 of the Securities Exchange Act of 1934, trades in the secondary market generally are required to settle in two business days, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade notes on any date prior to two business days before delivery will be required, by virtue of the fact that the notes are expected to settle in five business days (T + 5), to specify alternative settlement arrangements to prevent a failed settlement.

The Bank may use this Pricing Supplement in the initial sale of the notes.  In addition, CIBCWM or another of the Bank’s affiliates may use this Pricing Supplement in market-making transactions in any notes after their initial sale.  Unless CIBCWM or we inform you otherwise in the confirmation of sale, this Pricing Supplement is being used by CIBCWM in a market-making transaction.

While CIBCWM may make markets in the notes, it is under no obligation to do so and may discontinue any market-making activities at any time without notice. The price that it makes available from time to time after the issue date at which it would be willing to repurchase the notes will generally reflect its estimate of their value. That estimated value will be based upon a variety of factors, including then prevailing market conditions, our creditworthiness and transaction costs. However, for a period of approximately three months after the trade date, the price at which CIBCWM may repurchase the notes is expected to be higher than their estimated value at that time. This is because, at the beginning of this period, that price will not include certain costs that were included in the original issue price, particularly our hedging costs and profits. As the period continues, these costs are expected to be gradually included in the price that CIBCWM would be willing to pay, and the difference between that price and CIBCWM’s estimate of the value of the notes will decrease over time until the end of this period. After this period, if CIBCWM continues to make a market in the notes, the prices that it would pay for them are expected to reflect its estimated value, as well as customary bid-ask spreads for similar trades. In addition, the value of the notes shown on your account statement may not be identical to the price at which CIBCWM would be willing to purchase the notes at that time, and could be lower than CIBCWM’s price. See the section titled “Supplemental Plan of Distribution —  Conflicts of Interest” in the accompanying Prospectus Supplement.

The price at which you purchase the notes includes costs that the Bank or its affiliates expect to incur and profits that the Bank or its affiliates expect to realize in connection with hedging activities related to the notes, as set forth above. These costs and profits will likely reduce the secondary market price, if any secondary market develops, for the notes.

Any notes which are the subject of the offering contemplated by this Pricing Supplement, the accompanying Product Supplement No. 6, accompanying General Terms Supplement No. 1, accompanying Prospectus Supplement and accompanying Prospectus may not be offered, sold or otherwise made available to any retail investor in the European Economic Area (the “EEA”). Consequently no key information document required by Regulation (EU) No 1286/2014 (the “PRIIPs

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Regulation”) for offering or selling the notes or otherwise making them available to retail investors in the EEA has been prepared and therefore offering or selling the notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation. 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 an “offer” includes the communication in any form and by any means of sufficient information on the terms of the offer and the notes to be offered so as to enable an investor to decide to purchase or subscribe for the notes.

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CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

The following discussion is a brief summary of the material U.S. federal income tax considerations relating to an investment in the notes.  The following summary is not complete and is both qualified and supplemented by the discussion entitled “Supplemental Discussion of U.S. Federal Income Tax Consequences” in the accompanying Product Supplement No. 6, which you should carefully review prior to investing in the notes.

The U.S. federal income tax considerations of your investment in the notes are uncertain.  No statutory, judicial or administrative authority directly discusses how the notes should be treated for U.S. federal income tax purposes.  In the opinion of our tax counsel, Mayer Brown LLP, it would generally be reasonable to treat the notes as prepaid cash-settled derivative contracts.  Pursuant to the terms of the notes, you agree to treat the notes in this manner for all U.S. federal income tax purposes.  If this treatment is respected, you should generally recognize capital gain or loss upon the sale, exchange or payment upon maturity in an amount equal to the difference between the amount you receive in such transaction and the amount that you paid for your notes.  Such gain or loss should generally be treated as long-term capital gain or loss if you have held your notes for more than one year.

The expected characterization of the notes is not binding on the IRS or the courts.  It is possible that the IRS would seek to characterize the notes in a manner that results in tax consequences to you that are different from those described above or in the accompanying Product Supplement No. 6. Such alternate treatments could include a requirement that a holder accrue ordinary income over the life of the notes or treat all gain or loss at maturity as ordinary gain or loss.  For a more detailed discussion of certain alternative characterizations with respect to the notes and certain other considerations with respect to an investment in the notes, you should consider the discussion set forth in “Supplemental Discussion of U.S. Federal Income Tax Consequences” of Product Supplement No. 6.  We are not responsible for any adverse consequences that you may experience as a result of any alternative characterization of the notes for U.S. federal income tax or other tax purposes.

U.S. tax rules treat certain financial products issued to non-U.S. holders in 2017 or thereafter as giving rise to withholdable dividend equivalent payments when the financial product provides a payment or credit in respect of dividend payments on certain U.S. underliers.  These rules do not apply if the financial product references a qualified index and does not contain short positions on more than 5 percent of the components within the index.  Additionally, Treasury Regulations exclude financial products issued prior to 2019 that are not “delta-one” with respect to underlying securities that could pay withholdable dividend equivalent payments. In the opinion of Mayer Brown LLP, these rules should not apply to the notes.

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CERTAIN CANADIAN FEDERAL INCOME TAX CONSIDERATIONS

In the opinion of Blake, Cassels & Graydon LLP, our Canadian tax counsel, the following summary describes the principal Canadian federal income tax considerations under the Income Tax Act (Canada) (the “Canadian Tax Act”) generally applicable at the date hereof to a purchaser who acquires beneficial ownership of a note pursuant to this Pricing Supplement and who for the purposes of the Canadian Tax Act and the regulations thereto and at all relevant times: (a) is neither resident nor deemed to be resident in Canada; (b) deals at arm’s length with CIBC and any transferee resident (or deemed to be resident) in Canada to whom the purchaser disposes of the note; (c) does not use or hold and is not deemed to use or hold the note in, or in the course of, carrying on a business in Canada; (d) is entitled to receive all payments (including any interest and principal) made on the note, and (e) is not a, and deals at arm’s length with any, “specified shareholder” of CIBC for purposes of the thin capitalization rules in the Canadian Tax Act (a “Non-Resident Holder”). A “specified shareholder” for these purposes generally includes a person who (either alone or together with persons with whom that person is not dealing at arm’s length for the purposes of the Canadian Tax Act) owns or has the right to acquire or control or is otherwise deemed to own 25% or more of CIBC’s shares determined on a votes or fair market value basis. Special rules which apply to non-resident insurers carrying on business in Canada and elsewhere are not discussed in this summary.

This summary is supplemental to and should be read together with the description of material Canadian federal income tax considerations relevant to a Non-Resident Holder owning notes under “Material Income Tax Consequences — Canadian Taxation” in the accompanying Prospectus and a Non-Resident Holder should carefully read that description as well.

This summary is of a general nature only and is not intended to be, nor should it be construed to be, legal or tax advice to any particular Non-Resident Holder.  Non-Resident Holders are advised to consult with their own tax advisors with respect to their particular circumstances.

Based on Canadian tax counsel’s understanding of the Canada Revenue Agency’s administrative policies and having regard to the terms of the notes, interest payable on the notes should not be considered to be “participating debt interest” as defined in the Canadian Tax Act and accordingly, a Non-Resident Holder should not be subject to Canadian non-resident withholding tax in respect of amounts paid or credited or deemed to have been paid or credited by CIBC on a note as, on account of or in lieu of payment of, or in satisfaction of, interest.

Non-Resident Holders should consult their own tax advisors regarding the consequences to them of a disposition of the notes to a person with whom they are not dealing at arm’s length for purposes of the Canadian Tax Act.

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We have not authorized anyone to provide any information or to make any representations other than those contained or incorporated by reference in this Pricing Supplement, the accompanying Product Supplement No. 6, the accompanying General Terms Supplement, the accompanying Prospectus Supplement or the accompanying Prospectus. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. This Pricing Supplement, the accompanying Product Supplement No. 6, the accompanying General Terms Supplement, the accompanying Prospectus Supplement and the accompanying Prospectus is an offer to sell only the notes offered hereby, but only under circumstances and in jurisdictions where it is lawful to do so. The information contained in this Pricing Supplement, the accompanying Product Supplement No. 6, the accompanying General Terms Supplement, the accompanying Prospectus Supplement and the accompanying Prospectus is current only as of the respective dates of such documents.

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Pricing Supplement

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