加拿大帝国商业银行美股招股说明书(2026-06-30版)

The information in this preliminary pricing supplement is not complete and may be changed. This preliminary pricing supplement and the accompanyingproduct supplement, underlying supplement, prospectus supplement and prospectus are not an offer to sell these securities and we are not soliciting an offer tobuy these securities in any jurisdiction where the offer or sale is not permitted. Subject to Completion, Dated June 30, 2026PRICING SUPPLEMENT dated, 2026(To Product Supplement No. WF-1 dated June 4, 2026, Equity Index Underlying Supplement dated June 4,2026, Prospectus Supplement dated June 4, 2026 and Prospectus dated June 4, 2026) Canadian Imperial Bank of Commerce Senior Global Medium-Term Notes Market Linked Securities—Leveraged Upside Participation to a Capand Fixed Percentage Buffered Downside Principal at Risk Securities Linked to the Russell 2000®Index due August 3, 2028 Linked to the Russell 2000®Index Unlike ordinary debt securities, the securities do not pay interest or repay a fixed amount of principal at maturity. Instead, the securities provide for aMaturity Payment Amount that may be greater than, equal to or less than the face amount of the securities, depending on the performance of the Indexfrom the Starting Level to the Ending Level.The Maturity Payment Amount will reflect the following terms: If the level of the Index increases, you will receive the face amount plus a positive return equal to 200% of the percentage increase in the level of theIndex from the Starting Level, subject to a Maximum Return at maturity of at least 25.65% (to be determined on the Pricing Date) of the face amount.As a result of the Maximum Return, the maximum Maturity Payment Amount will be at least $1,256.50 per security If the level of the Index does not change or decreases but the decrease is not more than the Buffer Amount of 10%, you will receive the face amount If the level of the Index decreases by more than the Buffer Amount, you will receive less than the face amount and have 1-to-1 downside exposure tothe decrease in the level of the Index in excess of the Buffer Amount Investors may lose up to 90.00% of the face amount All payments on the securities are subject to the credit risk of Canadian Imperial Bank of Commerce and you will have no ability to pursue any securitiesincluded in the Index for payment; if Canadian Imperial Bank of Commerce defaults on its obligations, you could lose all or some of your investment No periodic interest payments or dividends No exchange listing; designed to be held to maturity The securities have complex features and investing in the securities involves risks not associated with an investment in conventional debtsecurities. See “Selected Risk Considerations” beginning on page PRS-7 herein and “Risk Factors” beginning on page S-1 of theaccompanying underlying supplement, page S-1 of the prospectus supplement and page 1 of the prospectus. The securities are unsecured obligations of Canadian Imperial Bank of Commerce and all payments on the securities are subject to thecredit risk of Canadian Imperial Bank of Commerce. The securities will not constitute deposits insured by the Canada Deposit InsuranceCorporation, the U.S. Federal Deposit Insurance Corporation or any other government agency or instrumentality of Canada, the UnitedStates or any other jurisdiction.The securities are not bail-inable debt securities (as defined on page 6 of the prospectus). Neither the Securities and Exchange Commission (the “SEC”) nor any state or provincial securities commission or other regulatory body hasapproved or disapproved of these securities or passed upon the accuracy or adequacy of this pricing supplement or the accompanyingproduct supplement, underlying supplement, prospectus supplement and prospectus. Any representation to the contrary is a criminaloffense. (1)The agent, Wells Fargo Securities, LLC (“Wells Fargo Securities”), will receive an underwriting discount of up to $25.75 per security. The agentmay resell the securities to other securities dealers at the original offering price less a concession not in excess of $20.00 per security. Suchsecurities dealers may include Wells Fargo Advisors (“WFA”) (the trade name of the retail brokerage business of Wells Fargo Clearing Services,LLC and Wells Fargo Advisors Financial Network, LLC, each an affiliate of Wells Fargo Securities). In addition to the selling concession allowedto WFA, the agent may pay $0.75 per security of the underwriting discount to WFA as a distribution expense fee for each security sold by WFA.See “Terms of the Securities—Agent’s Underwriting Discount and Other Fees” in this pricing supplement and “Use of Proceeds and Hedging” inthe underlying supplement for information regarding how we may hedge our obligations under the securities.(2)In respect of certain securities sold in this offering, the Issuer may pay a fee of up to $1.00 per security to selected securities dealers in consider