Exhibit 99.1

CPKC announces C$1.4 billion debt offering

The shelf prospectus supplement, the corresponding base shelf prospectus and any

amendment to the documents is accessible through SEDAR+

Calgary – Canadian Pacific Kansas City Limited (TSX: CP) (NYSE: CP) (“CPKC”) announces that its wholly- owned subsidiary, Canadian Pacific Railway Company (“CPRC”), is issuing C$500 million of 4.00% Notes due 2032, C$600 million of 4.40% Notes due 2036 and C$300 million of 4.80% Notes due 2055, which will be guaranteed by CPKC (the “Offering”).

The transaction is expected to close on June 13, 2025, subject to the satisfaction of customary closing conditions. The net proceeds from this Offering will be used to refinance CPRC’s outstanding indebtedness and for general corporate purposes.

The joint lead agents and joint active book-runners for the Offering are Scotia Capital Inc., BMO Nesbitt Burns Inc., CIBC World Markets Inc. and RBC Capital Markets.

The Offering is being made in Canada under CPRC’s base shelf prospectus dated March 6, 2025, as supplemented by the prospectus supplement in respect of the Offering dated June 11, 2025 (the “Prospectus”).

The securities issued under the Offering have not been registered under the U.S. Securities Act of 1933, as amended, or any state securities laws, and may not be offered or sold in the United States or to U.S. persons without registration or an applicable exemption from, or in a transaction not subject to, the registration requirements of the U.S. Securities Act of 1933 and applicable securities laws. This press release does not constitute an offer to sell or the solicitation of an offer to buy any securities nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful.

Access to the Prospectus is provided in accordance with securities legislation relating to procedures for providing access to a shelf prospectus supplement, a base shelf prospectus and any amendment. The document is accessible on SEDAR+ at www.sedarplus.ca.

An electronic or paper copy of the Prospectus and any amendment thereto may be obtained, without charge, from Scotia Capital Inc. by phone at 416-863-7776 or by email at syndicate.toronto@scotiabank.com, from BMO Nesbitt Burns Inc. by phone at 416-359-6359 or by email at DCMCADSyndicateDesk@bmo.com, from CIBC World Markets Inc. by phone at 416-594-8515 or by email at mailbox.cibcdebtsyndication
@cibc.com, and from RBC Dominion Securities Inc. by phone at 416-842-6311 or by email at torontosyndicate@rbccm.com, by providing the contact with an email address or address, as applicable.

Forward-looking information

This news release contains certain forward-looking information and forward-looking statements (collectively, “forward-looking information”) within the meaning of applicable securities laws. Forward-looking information includes, but is not limited to, statements concerning expectations, beliefs, plans, goals, objectives, assumptions and statements about possible future events, conditions, and results of operations or performance. Forward-looking information may contain statements with words or headings such as “financial expectations”, “key assumptions”, “anticipate”, “believe”, “expect”, “plan”, “will”, “outlook”, “should” or similar words suggesting future outcomes.

This news release contains forward-looking information relating, but not limited to, the intended use of proceeds from the Offering, including the refinancing of outstanding indebtedness and the timing and completion of the proposed Offering.

The forward-looking information that may be in this news release is based on current expectations, estimates, projections and assumptions, having regard to CPKC’s experience and its perception of historical trends, and includes, but is not limited to, expectations, estimates, projections and assumptions relating to: changes in business strategies, North American and global economic growth and conditions; commodity demand growth; sustainable industrial and agricultural production; commodity prices and interest rates; performance of our assets and equipment; sufficiency of our budgeted capital expenditures in carrying out our business plan; geopolitical conditions, applicable laws, regulations and government policies; the availability and cost of labour, services and infrastructure; the satisfaction by third parties of their obligations to CPKC; and carbon markets, evolving sustainability strategies, and scientific or technological developments. Although CPKC believes the expectations, estimates, projections and assumptions reflected in the forward-looking information presented herein are reasonable as of the date hereof, there can be no assurance that they will prove to be correct. Current conditions, economic and otherwise, render assumptions, although reasonable when made, subject to greater uncertainty.

Undue reliance should not be placed on forward-looking information as actual results may differ materially from those expressed or implied by forward-looking information. By its nature, CPKC’s forward-looking information involves inherent risks and uncertainties that could cause actual results to differ materially from the forward-looking information, including, but not limited to, the following factors: an inability to complete the Offering; the risk that, notwithstanding our current intentions regarding the use of the net proceeds of the Offering, there may be circumstances where a reallocation of the net proceeds may be necessary, depending on future operations, unforeseen events or whether future growth opportunities arise; changes in business strategies and strategic opportunities; general North American and global social, economic, political, credit and business conditions; risks associated with agricultural production such as weather conditions and insect populations; the availability and price of energy commodities; the effects of competition and pricing pressures; industry capacity; shifts in market demand; changes in commodity prices and commodity demand; uncertainty surrounding timing and volumes of commodities being shipped via CPKC; inflation; geopolitical instability; changes in laws, regulations and government policies, including, without limitation, those relating to regulation of rates, tariffs, import/export, trade, wages, labour and immigration; changes in taxes and tax rates; potential increases in maintenance and operating costs; changes in fuel prices; disruption of fuel supplies; uncertainties of investigations, proceedings or other types of claims and litigation; compliance with environmental regulations; labour disputes; changes in labour costs and labour difficulties; risks and liabilities arising from derailments; transportation of dangerous goods; timing of completion of capital and maintenance projects; sufficiency of budgeted capital expenditures in carrying out business plans; services and infrastructure; the satisfaction by third parties of their obligations; currency and interest rate fluctuations; exchange rates; effects of changes in market conditions and discount rates on the financial position of pension plans and investments; trade restrictions, including the imposition of any tariffs, or other changes to international trade arrangements; the effects of current and future multinational trade agreements on or other developments affecting the level of trade among Canada, the U.S.

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and Mexico; climate change and the market and regulatory responses to climate change; anticipated in-service dates; success of hedging activities; operational performance and reliability; customer, regulatory and other stakeholder approvals and support; regulatory and legislative decisions and actions; the adverse impact of any termination or revocation by the Mexican government of Kansas City Southern de México, S.A. de C.V.’s concession; public opinion; various events that could disrupt operations, including severe weather, such as droughts, floods, avalanches, volcanism and earthquakes, and cybersecurity attacks, as well as security threats and governmental response to them, and technological changes; acts of terrorism, war or other acts of violence or crime or risk of such activities; insurance coverage limitations; material adverse changes in economic and industry conditions; the outbreak of a pandemic or contagious disease and the resulting effects on economic conditions; the demand environment for logistics requirements and energy prices, restrictions imposed by public health authorities or governments; fiscal and monetary policy responses by governments and financial institutions; disruptions to global supply chains; the realization of anticipated benefits and synergies of the CP-KCS transaction and the timing thereof; the satisfaction of the conditions imposed by the U.S. Surface Transportation Board in its March 15, 2023 decision; the successful integration of Kansas City Southern into CPKC; the focus of management time and attention on the CP-KCS transaction and other disruptions arising from the CP-KCS integration; estimated future dividends; financial strength and flexibility; debt and equity market conditions, including the ability to access capital markets on favourable terms or at all; cost of debt and equity capital; improvement in data collection and measuring systems; industry-driven changes to methodologies; and the ability of the management of CPKC to execute key priorities, including those in connection with the CP-KCS transaction. The foregoing list of factors is not exhaustive. These and other factors are detailed from time to time in reports filed by CPKC with securities regulators in Canada and the United States. Reference should be made to “Item 1A - Risk Factors” and “Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations - Forward-Looking Statements” in CPKC’s annual and interim reports on Form 10-K and 10-Q. Any forward-looking information contained in this news release is made as of the date hereof. Except as required by law, CPKC undertakes no obligation to update publicly or otherwise revise any forward-looking information, or the foregoing assumptions and risks affecting such forward-looking information, whether as a result of new information, future events or otherwise.

About CPKC

With its global headquarters in Calgary, Alta., Canada, CPKC is the first and only single-line transnational railway linking Canada, the United States and México, with unrivaled access to major ports from Vancouver to Atlantic Canada to the Gulf Coast to Lázaro Cárdenas, México. Stretching approximately 20,000 route miles and employing 20,000 railroaders, CPKC provides North American customers unparalleled rail service and network reach to key markets across the continent. CPKC is growing with its customers, offering a suite of freight transportation services, logistics solutions and supply chain expertise. CP-IR

Contacts:

Media

mediarelations@cpkcr.com

Investment Community

Chris De Bruyn

403-319-3591

investor@cpkcr.com

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