Email from Warren Erdman, Executive Vice President - Administration & Corporate Affairs, Kansas City Southern to Select Recipients Subject: CN Open Gateways commitment provides grain customers the rail access they want; CN-KCS CEOs discuss supply chain and environmental benefits of proposed combination. Grain customers of the railroads would benefit from the choice of routes and competitive rates, better service, and innovation resulting from the competition for their business by CN’s open gateways commitment in the CN-KCS combination. In an op-ed published by Railway Age on June 22nd, Dr. William Huneke, the former Director of the Office of Economics and Chief Economist at STB, described CN’s open gateways commitment as a “big deal,” stating that it “ensures that shippers who today enjoy competitive joint line routings with either CN or KCS will continue to have those routings available to them in a post CN/KCS merger environment, even if a merged CN/KCS could handle the entire movement via a single-line routing.” Likewise, the combination of CN and KCS will supply critical infrastructure to shorten strained supply chains. It will enhance competition and support the economies of the United States, Mexico and Canada, allowing the US-Mexico-Canada Agreement to reach its full potential. It also will have key environmental benefits for the customers and communities it would serve. These benefits are highlighted in the two attached press releases. I hope you might have an opportunity to take a look at them and see why we are so excited about what this combination can do for the U.S. and North American competitiveness. To learn more about creating the premier railway for the 21st century, please go to: https://www.connectedcontinent.com/ . Thanks again for your interest in Kansas City Southern. Very sincerely, Warren K. Erdman Filed by Canadian National Railway Company Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Kansas City Southern Commission File No.: 333-257298 Date: June 25, 2021

North America’s Railroad NEWS RELEASE CN’s JJ Ruest and KCS’ Pat Ottensmeyer Emphasized Supply Chain and Environmental Benefits of Transaction in Op-Ed Affirmed Commitment to Helping American Business Nearshore Supply Chains and Reduce Carbon Footprint Approval of Proposed Voting Trust Fundamental to Realizing Combination’s Benefits MONTREAL and KANSAS CITY, Mo., June 25, 2021 — An op-ed co-authored by JJ Ruest, President and Chief Executive Officer of CN (TSX: CNR) (NYSE: CNI) and Patrick J. Ottensmeyer, President and Chief Executive Officer of Kansas City Southern (“KCS”) (NYSE: KSU) was published in The Hill yesterday under the headline “Rail merger is a key to economic growth, supply chain security.” In the op-ed, Ruest and Ottensmeyer articulated how the combination of CN and KCS will supply critical infrastructure to shorten supply chains. They underscored that the combination will enhance competition and support the economies of the United States, Mexico and Canada, allowing the US-Mexico-Canada Agreement to reach its full potential: “Consider an auto manufacturer in Michigan: Our track would directly connect Detroit to the heart of Mexico, giving U.S. manufacturers more competitive routes and the ability to create U.S. jobs as they meet new domestic and regional content requirements under the USMCA. Other potential beneficiaries include grain farmers in Illinois, Iowa and Wisconsin who would have expanded reach into global markets, as well as ethanol producers in Iowa who would have direct access to markets in Mexico; home-builders in Texas and poultry farmers in Arkansas would benefit from expanded supply networks of lumber and source feed ingredients.” Ruest and Ottensmeyer also highlighted key environmental benefits the combination will deliver to customers and communities: “For a single route, from San Luis Potosi, Mexico, to Detroit, Mich., moving freight from trucks to trains would save 260,000 tons of CO2 per year, the equivalent of the average annual emissions of more than 300 long-haul trucks. Multiply that across multiple routes and years, and the impact would be significant.”

The op-ed also advocated for the approval of CN-KCS’ proposed plain vanilla voting trust. The voting trust is identical to the CP trust approved by the STB and meets the test for approval: (a) it prevents premature control of KCS; (b) allows KCS to maintain independence during the STB’s review of the ultimate combination of CN and KCS; and (c) protects KCS’ financial health during this period. The full op-ed can be read on The Hill here. For more information about CN’s and KCS’ pro-competitive combination, please visit www.ConnectedContinent.com. About CN CN is a world-class transportation leader and trade-enabler. Essential to the economy, to the customers, and to the communities it serves, CN safely transports more than 300 million tons of natural resources, manufactured products, and finished goods throughout North America every year. As the only railroad connecting Canada’s Eastern and Western coasts with the U.S. South through a 19,500-mile rail network, CN and its affiliates have been contributing to community prosperity and sustainable trade since 1919. CN is committed to programs supporting social responsibility and environmental stewardship. About Kansas City Southern Headquartered in Kansas City, Mo., Kansas City Southern (KCS) (NYSE: KSU) is a transportation holding company that has railroad investments in the U.S., Mexico and Panama. Its primary U.S. holding is The Kansas City Southern Railway Company, serving the central and south central U.S. Its international holdings include Kansas City Southern de Mexico, S.A. de C.V., serving northeastern and central Mexico and the port cities of Lázaro Cárdenas, Tampico and Veracruz, and a 50 percent interest in Panama Canal Railway Company, providing ocean-to-ocean freight and passenger service along the Panama Canal. KCS' North American rail holdings and strategic alliances with other North American rail partners are primary components of a unique railway system, linking the commercial and industrial centers of the U.S., Mexico and Canada. More information about KCS can be found at www.kcsouthern.com. Forward Looking Statements Certain statements included in this news release constitute “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and under Canadian securities laws, including statements based on management’s assessment and assumptions and publicly available information with respect to KCS, regarding the proposed transaction between CN and KCS, the expected benefits of the proposed transaction and future opportunities for the combined company. By their nature, forward-looking statements involve risks, uncertainties and assumptions. CN cautions that its assumptions may not materialize and that current economic conditions render such assumptions, although reasonable at the time they

were made, subject to greater uncertainty. Forward-looking statements may be identified by the use of terminology such as “believes,” “expects,” “anticipates,” “assumes,” “outlook,” “plans,” “targets,” or other similar words. Forward-looking statements are not guarantees of future performance and involve risks, uncertainties and other factors which may cause actual results, performance or achievements of CN, or the combined company, to be materially different from the outlook or any future results, performance or achievements implied by such statements. Accordingly, readers are advised not to place undue reliance on forward-looking statements. Important risk factors that could affect the forward-looking statements in this news release include, but are not limited to: the outcome of the proposed transaction between CN and KCS; the parties’ ability to consummate the proposed transaction; the conditions to the completion of the proposed transaction; that the regulatory approvals required for the proposed transaction may not be obtained on the terms expected or on the anticipated schedule or at all; CN’s indebtedness, including the substantial indebtedness CN expects to incur and assume in connection with the proposed transaction and the need to generate sufficient cash flows to service and repay such debt; CN’s ability to meet expectations regarding the timing, completion and accounting and tax treatments of the proposed transaction; the possibility that CN may be unable to achieve expected synergies and operating efficiencies within the expected time-frames or at all and to successfully integrate KCS’ operations with those of CN; that such integration may be more difficult, time-consuming or costly than expected; that operating costs, customer loss and business disruption (including, without limitation, difficulties in maintaining relationships with employees, customers or suppliers) may be greater than expected following the proposed transaction or the public announcement of the proposed transaction; the retention of certain key employees of KCS may be difficult; the duration and effects of the COVID-19 pandemic, general economic and business conditions, particularly in the context of the COVID-19 pandemic; industry competition; inflation, currency and interest rate fluctuations; changes in fuel prices; legislative and/or regulatory developments; compliance with environmental laws and regulations; actions by regulators; the adverse impact of any termination or revocation by the Mexican government of KCS de México, S.A. de C.V.’s Concession; increases in maintenance and operating costs; security threats; reliance on technology and related cybersecurity risk; trade restrictions or other changes to international trade arrangements; transportation of hazardous materials; various events which could disrupt operations, including illegal blockades of rail networks, and natural events such as severe weather, droughts, fires, floods and earthquakes; climate change; labor negotiations and disruptions; environmental claims; uncertainties of investigations, proceedings or other types of claims and litigation; risks and liabilities arising from derailments; timing and completion of capital programs; and other risks detailed from time to time in reports filed by CN with securities regulators in Canada and the United States. Reference should also be made to Management’s Discussion and Analysis in CN’s annual and interim reports, Annual Information Form and Form 40-F, filed with Canadian and U.S. securities regulators and available on CN’s website, for a description of major risk factors relating to CN. Additional risks that may affect KCS’ results of operations appear in Part I, Item 1A “Risks Related to KCS’

Operations and Business” of KCS’ Annual Report on Form 10-K for the year ended December 31, 2020, and in KCS’ other filings with the U.S. Securities and Exchange Commission (“SEC”). Forward-looking statements reflect information as of the date on which they are made. CN assumes no obligation to update or revise forward-looking statements to reflect future events, changes in circumstances, or changes in beliefs, unless required by applicable securities laws. In the event CN does update any forward-looking statement, no inference should be made that CN will make additional updates with respect to that statement, related matters, or any other forward-looking statement. No Offer or Solicitation This news release does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended. Additional Information and Where to Find It In connection with the proposed transaction, CN has filed with the SEC a registration statement on Form F-4 to register the shares to be issued in connection with the proposed transaction. The registration statement includes a preliminary proxy statement of KCS which, when finalized, will be sent to the stockholders of KCS seeking their approval of the merger-related proposals. The registration statement has not yet become effective. This news release is not a substitute for the proxy statement or registration statement or other documents CN and/or KCS may file with the SEC or applicable securities regulators in Canada in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE PRELIMINARY PROXY STATEMENT, THE REGISTRATION STATEMENT, THE PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC OR APPLICABLE SECURITIES REGULATORS IN CANADA CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE (INCLUDING ALL AMENDMENTS AND SUPPLEMENTS THERETO) BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT CN, KCS AND THE PROPOSED TRANSACTIONS. Any definitive proxy statement(s), registration statement or prospectus(es) and other documents filed by CN and KCS (if and when available) will be mailed to stockholders of CN and/or KCS, as applicable. Investors and security holders will be able to obtain copies of these documents (if and when available) and other documents filed with the SEC and applicable securities regulators in Canada by CN free of charge through at www.sec.gov and www.sedar.com. Copies of the documents filed by CN (if and when available) will also be made available free of charge by accessing CN’s website at www.CN.ca. Copies of the documents filed by KCS (if and when available) will also be made available free of charge at www.investors.kcsouthern.com, upon written request delivered to KCS at 427 West

12th Street, Kansas City, Missouri 64105, Attention: Corporate Secretary, or by calling KCS’ Corporate Secretary’s Office by telephone at 1-888-800-3690 or by email at corpsec@kcsouthern.com. Participants This news release is neither a solicitation of a proxy nor a substitute for any proxy statement or other filings that may be made with the SEC and applicable securities regulators in Canada. Nonetheless, CN, KCS, and certain of their directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed transactions. Information about CN’s executive officers and directors is available in its 2021 Management Information Circular, dated March 9, 2021, as well as its 2020 Annual Report on Form 40-F filed with the SEC on February 1, 2021, in each case available on its website at www.CN.ca/investors/ and at www.sec.gov and www.sedar.com. Information about KCS’ directors and executive officers may be found on its website at www.kcsouthern.com and in its 2020 Annual Report on Form 10-K filed with the SEC on January 29, 2021, available at www.investors.kcsouthern.com and www.sec.gov. Additional information regarding the interests of such potential participants will be included in one or more registration statements, proxy statements or other documents filed with the SEC and applicable securities regulators in Canada if and when they become available. These documents (if and when available) may be obtained free of charge from the SEC’s website at www.sec.gov and from www.sedar.com, as applicable. Contacts: Media: CN Canada Mathieu Gaudreault CN Media Relations & Public Affairs (514) 249-4735 Mathieu.Gaudreault@cn.ca Longview Communications & Public Affairs Martin Cej (403) 512-5730 mcej@longviewcomms.ca United States Brunswick Group Jonathan Doorley / Rebecca Kral (917) 459-0419 / (917) 818-9002 jdoorley@brunswickgroup.com Investment Community: CN Paul Butcher Vice-President Investor Relations (514) 399-0052 investor.relations@cn.ca Investment Community: KCS Ashley Thorne Vice President Investor Relations (816) 983-1530 athorne@kcsouthern.com MacKenzie Partners, Inc. Dan Burch / Laurie Connell (212) 929-5748 / (212) 378-7071

rkral@brunswickgroup.com Media: KCS C. Doniele Carlson KCS Corporate Communications & Community Affairs (816) 983-1372 dcarlson@kcsouthern.com Joele Frank, Wilkinson Brimmer Katcher Tim Lynch / Ed Trissel (212) 355-4449

North America’s Railroad CN’s OPEN GATEWAYS COMMITMENT IN CN-KCS COMBINATION PROVIDES GRAIN CUSTOMERS, INCLUDING IN THE UPPER MIDWESTERN U.S., THE COMPETITIVE ACCESS THEY WANT Pro-competitive open gateways commitment preserves all existing competitive options; gives customers the choice of route Maintains existing routes for agricultural customers in Upper Midwest Provides new, single-line, rail-to-rail competition Former Director of Office of Economics and Chief Economist at the Surface Transportation Board describes CN’s open gateways offer as “a big deal” MONTREAL and KANSAS CITY, June 24, 2021 – CN (TSX: CNR) (NYSE: CNI) and Kansas City Southern (NYSE: KSU) (“KCS”) today highlighted the benefits realized by grain customers, including farmer-owned grain co-operatives, through CN’s open gateways commitment in the CN-KCS combination. These stakeholders, including agricultural customers in the Upper Midwestern U.S., would benefit from a choice of routes and competitive rates, better service and innovation resulting from the competition for their business. “CN’s commitment to keep gateways open on commercially reasonable terms means that agricultural customers, including farmer-owned co-operatives, enjoying competitive joint line routings with CN or KCS, will continue to have those routings available upon completion of the merger,” said James Cairns, CN’s Senior Vice President, Rail Centric Supply Chain. “This commitment assures grain customers shipping over CP lines to Kansas City and beyond will continue to enjoy the interline service they have today, along with new, enhanced rail-to-rail competition. However, for these benefits to be realized, the CN voting trust must be approved by the Surface Transportation Board (“STB”).” In an op-ed published by Railway Age on June 22nd, Dr. William Huneke, the former Director of the Office of Economics and Chief Economist at STB described CN’s open gateways commitment as a “big deal,” stating:  “This commitment ensures that shippers who today enjoy competitive joint line routings with either CN or KCS will continue to have those routings available to them in a post

CN/KCS merger environment, even if a merged CN/KCS could handle the entire movement via a single-line routing.”  “This means continued competition, and we know that competition encourages lower rates, better service and innovation.”  “The commitment is not just about maintaining physical routings, but also about ensuring that the routings are commercially reasonable to the shipper. What is meant by “open on commercially reasonable terms”? This means all market participants, railroads and shippers will benefit: They will get a fair chance to compete. They will pay and receive remunerative rates and get efficient service. If a shipper is not happy with their service, they can switch to another carrier because they will still have a choice.”  “A CN/KCS combination will create a strong new rail-to-rail competitor that will provide new single-line rail movements in competition with other rail carriers. In addition, with the gateway commitment, shippers will also have the option to use an existing routing or other routings involving more than just the merged CN/KCS.” More than 1,500 letters in support of the CN-KCS combination have been sent to CN and KCS and filed with the STB from customers, suppliers, elected officials and other stakeholders. A list of our supporters can be found at www.ConnectedContinent.com. For the combination of KCS and CN to proceed, the STB must first approve the use of a voting trust. CN’s plain vanilla voting trust, which is identical to the CP trust approved for use by the STB, is an integral component of the CN-KCS combination. It prevents premature control of KCS, allows KCS to maintain independence and protects KCS’ financial health during the STB’s review of the ultimate combination of CN and KCS. Additionally, CN has committed to divesting the sole area of overlap between the CN and KCS networks – KCS’ 70-mile line between New Orleans and Baton Rouge – thereby making the combination a true end-to-end transaction, and has agreed to preserve existing route options by keeping gateways open on commercially reasonable terms. The proposed CN-KCS combination represents a procompetitive solution that offers unparalleled opportunities for customers, employees, shareholders, the environment and the North American economy. For more information on CN’s pro-competitive combination with KCS, please visit www.ConnectedContinent.com. About Dr. Huneke Dr. Huneke is former Director of the Office of Economics and Chief Economist at the Surface Transportation Board. He is now a consulting economist and provides economic advice to private sector clients. He has provided testimony and litigation advice to Class I railroads, including KCS, and to the American Short Line and Regional Railroads Association. About CN CN is a world-class transportation leader and trade-enabler. Essential to the economy, to the customers, and to the communities it serves, CN safely transports more than 300 million tons of

natural resources, manufactured products, and finished goods throughout North America every year. As the only railroad connecting Canada’s Eastern and Western coasts with the U.S. South through a 19,500-mile rail network, CN and its affiliates have been contributing to community prosperity and sustainable trade since 1919. CN is committed to programs supporting social responsibility and environmental stewardship. About Kansas City Southern Headquartered in Kansas City, Mo., Kansas City Southern (KCS) (NYSE: KSU) is a transportation holding company that has railroad investments in the U.S., Mexico and Panama. Its primary U.S. holding is The Kansas City Southern Railway Company, serving the central and south central U.S. Its international holdings include Kansas City Southern de Mexico, S.A. de C.V., serving northeastern and central Mexico and the port cities of Lázaro Cárdenas, Tampico and Veracruz, and a 50 percent interest in Panama Canal Railway Company, providing ocean-to-ocean freight and passenger service along the Panama Canal. KCS' North American rail holdings and strategic alliances with other North American rail partners are primary components of a unique railway system, linking the commercial and industrial centers of the U.S., Mexico and Canada. More information about KCS can be found at www.kcsouthern.com Forward Looking Statements Certain statements included in this news release constitute “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and under Canadian securities laws, including statements based on management’s assessment and assumptions and publicly available information with respect to KCS, regarding the proposed transaction between CN and KCS, the expected benefits of the proposed transaction and future opportunities for the combined company. By their nature, forward-looking statements involve risks, uncertainties and assumptions. CN cautions that its assumptions may not materialize and that current economic conditions render such assumptions, although reasonable at the time they were made, subject to greater uncertainty. Forward-looking statements may be identified by the use of terminology such as “believes,” “expects,” “anticipates,” “assumes,” “outlook,” “plans,” “targets,” or other similar words. Forward-looking statements are not guarantees of future performance and involve risks, uncertainties and other factors which may cause actual results, performance or achievements of CN, or the combined company, to be materially different from the outlook or any future results, performance or achievements implied by such statements. Accordingly, readers are advised not to place undue reliance on forward-looking statements. Important risk factors that could affect the forward-looking statements in this news release include, but are not limited to: the outcome of the proposed transaction between CN and KCS; the parties’ ability to consummate the proposed transaction; the conditions to the completion of the proposed transaction; that the regulatory approvals required for the proposed transaction may not be obtained on the terms expected or on the anticipated schedule or at all; CN’s indebtedness, including the substantial indebtedness CN expects to incur and assume in connection with the proposed transaction and the need to generate sufficient cash flows to service and repay such debt; CN’s ability to meet

expectations regarding the timing, completion and accounting and tax treatments of the proposed transaction; the possibility that CN may be unable to achieve expected synergies and operating efficiencies within the expected time-frames or at all and to successfully integrate KCS’ operations with those of CN; that such integration may be more difficult, time-consuming or costly than expected; that operating costs, customer loss and business disruption (including, without limitation, difficulties in maintaining relationships with employees, customers or suppliers) may be greater than expected following the proposed transaction or the public announcement of the proposed transaction; the retention of certain key employees of KCS may be difficult; the duration and effects of the COVID-19 pandemic, general economic and business conditions, particularly in the context of the COVID-19 pandemic; industry competition; inflation, currency and interest rate fluctuations; changes in fuel prices; legislative and/or regulatory developments; compliance with environmental laws and regulations; actions by regulators; the adverse impact of any termination or revocation by the Mexican government of KCS de México, S.A. de C.V.’s Concession; increases in maintenance and operating costs; security threats; reliance on technology and related cybersecurity risk; trade restrictions or other changes to international trade arrangements; transportation of hazardous materials; various events which could disrupt operations, including illegal blockades of rail networks, and natural events such as severe weather, droughts, fires, floods and earthquakes; climate change; labor negotiations and disruptions; environmental claims; uncertainties of investigations, proceedings or other types of claims and litigation; risks and liabilities arising from derailments; timing and completion of capital programs; and other risks detailed from time to time in reports filed by CN with securities regulators in Canada and the United States. Reference should also be made to Management’s Discussion and Analysis in CN’s annual and interim reports, Annual Information Form and Form 40-F, filed with Canadian and U.S. securities regulators and available on CN’s website, for a description of major risk factors relating to CN. Additional risks that may affect KCS’ results of operations appear in Part I, Item 1A “Risks Related to KCS’ Operations and Business” of KCS’ Annual Report on Form 10-K for the year ended December 31, 2020, and in KCS’ other filings with the U.S. Securities and Exchange Commission (“SEC”). Forward-looking statements reflect information as of the date on which they are made. CN assumes no obligation to update or revise forward-looking statements to reflect future events, changes in circumstances, or changes in beliefs, unless required by applicable securities laws. In the event CN does update any forward-looking statement, no inference should be made that CN will make additional updates with respect to that statement, related matters, or any other forward-looking statement. No Offer or Solicitation This news release does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Additional Information and Where to Find It In connection with the proposed transaction, CN has filed with the SEC a registration statement on Form F-4 to register the shares to be issued in connection with the proposed transaction. The registration statement includes a preliminary proxy statement of KCS which, when finalized, will be sent to the stockholders of KCS seeking their approval of the merger-related proposals. The registration statement has not yet become effective. This news release is not a substitute for the proxy statement or registration statement or other documents CN and/or KCS may file with the SEC or applicable securities regulators in Canada in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE PRELIMINARY PROXY STATEMENT, THE REGISTRATION STATEMENT, THE PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC OR APPLICABLE SECURITIES REGULATORS IN CANADA CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE (INCLUDING ALL AMENDMENTS AND SUPPLEMENTS THERETO) BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT CN, KCS AND THE PROPOSED TRANSACTIONS. Any definitive proxy statement(s), registration statement or prospectus(es) and other documents filed by CN and KCS (if and when available) will be mailed to stockholders of CN and/or KCS, as applicable. Investors and security holders will be able to obtain copies of these documents (if and when available) and other documents filed with the SEC and applicable securities regulators in Canada by CN free of charge through at www.sec.gov and www.sedar.com. Copies of the documents filed by CN (if and when available) will also be made available free of charge by accessing CN’s website at www.CN.ca. Copies of the documents filed by KCS (if and when available) will also be made available free of charge at www.investors.kcsouthern.com, upon written request delivered to KCS at 427 West 12th Street, Kansas City, Missouri 64105, Attention: Corporate Secretary, or by calling KCS’ Corporate Secretary’s Office by telephone at 1-888-800-3690 or by email at corpsec@kcsouthern.com. Participants This news release is neither a solicitation of a proxy nor a substitute for any proxy statement or other filings that may be made with the SEC and applicable securities regulators in Canada. Nonetheless, CN, KCS, and certain of their directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed transactions. Information about CN’s executive officers and directors is available in its 2021 Management Information Circular, dated March 9, 2021, as well as its 2020 Annual Report on Form 40-F filed with the SEC on February 1, 2021, in each case available on its website at www.CN.ca/investors/ and at www.sec.gov and www.sedar.com. Information about KCS’ directors and executive officers may be found on its website at www.kcsouthern.com and in its 2020 Annual Report on Form 10-K filed with the SEC on January 29, 2021, available at www.investors.kcsouthern.com and www.sec.gov. Additional information regarding the interests of such potential participants will be included in one or more registration statements, proxy statements or other documents filed with the SEC and applicable securities regulators in Canada if and when they become available. These documents

(if and when available) may be obtained free of charge from the SEC’s website at www.sec.gov and from www.sedar.com, as applicable. Contacts: Media: CN Canada Mathieu Gaudreault CN Media Relations & Public Affairs (514) 249-4735 Mathieu.Gaudreault@cn.ca Longview Communications & Public Affairs Martin Cej (403) 512-5730 mcej@longviewcomms.ca United States Brunswick Group Jonathan Doorley / Rebecca Kral (917) 459-0419 / (917) 818-9002 jdoorley@brunswickgroup.com rkral@brunswickgroup.com Media: KCS C. Doniele Carlson KCS Corporate Communications & Community Affairs (816) 983-1372 dcarlson@kcsouthern.com Joele Frank, Wilkinson Brimmer Katcher Tim Lynch / Ed Trissel (212) 355-4449 Investment Community: CN Paul Butcher Vice-President Investor Relations (514) 399-0052 investor.relations@cn.ca Investment Community: KCS Ashley Thorne Vice President Investor Relations (816) 983-1530 athorne@kcsouthern.com MacKenzie Partners, Inc. Dan Burch / Laurie Connell (212) 929-5748 / (212) 378-7071