Company: WCN
Filing Date: 2025-05-30
Form Type: 424B5
Source: 0001104659-25-054854
Chunk: 64

Company: Waste Connections, Inc.
Filing Date: 2025-05-30
Form: 424B5
Chunk 64
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 in original actions in Canadian courts, of liabilities based upon the United States federal securities laws or the securities or “blue sky” laws of any state within the United States and as to the enforceability in Canadian courts of judgments of United States courts obtained in actions based upon the civil liability provisions of the United States federal securities laws or any such state securities or “blue sky” laws. Therefore, it may not be possible to enforce those actions against us, certain of our officers and directors or one of the experts named in this prospectus supplement.

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TABLE OF CONTENTS

### LEGAL MATTERS
The validity of the issuance of the Notes offered pursuant to this prospectus supplement and the accompanying base prospectus will be passed upon for us by Latham & Watkins LLP, Houston, Texas, with respect to U.S. legal matters, and by Bennett Jones LLP, Calgary, Alberta, with respect to Canadian legal matters. Certain legal matters relating to the Notes offered pursuant to this prospectus supplement and the accompanying base prospectus will be passed upon for the underwriters by Simpson Thacher & Bartlett LLP, New York, New York, with respect to U.S. legal matters.

### EXPERTS
The financial statements and management’s assessment of the effectiveness of internal control over financial reporting incorporated by reference in this prospectus supplement and elsewhere in the registration statement have been so incorporated by reference in reliance upon the reports of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

### INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
The SEC allows us to “incorporate by reference” the information we file with the SEC, which means that we can disclose important business, financial and other information to you by referring you to other documents separately filed with the SEC. The information incorporated by reference is considered to be part of this prospectus supplement and the accompanying base prospectus from the date we file that document, and subsequent information that we file with the SEC will automatically update and, where applicable, supersede that information.

We incorporate by reference the following documents or information filed with the SEC and any subsequent filings we make with the SEC under Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to completion of the offering of the securities described in this prospectus supplement (other than, in each case, documents or information deemed to have been furnished and not filed in accordance with SEC rules):

•

Our