Company: WCN
Filing Date: 2025-05-30
Form Type: 424B5
Source: 0001104659-25-054854
Chunk: 88

Company: Waste Connections, Inc.
Filing Date: 2025-05-30
Form: 424B5
Chunk 88
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tn: Investor Relations 
 3 Waterway Square Place, Suite 110 
 The Woodlands, TX 77380 
 (832) 442-2200</div>

### WHERE YOU CAN FIND MORE INFORMATION
We are subject to the information reporting requirements of the Exchange Act, and, in accordance with these requirements, we are required to file Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act. In addition, we are required to file proxy statements pursuant to Section 14 of the Exchange Act. The reports and other information filed by us with the SEC are available to the public at the SEC’s website at www.sec.gov. In addition, you may obtain these materials on our website at www.wasteconnections.com. Information contained on our website is not and should not be deemed a part of this prospectus or any other report or filing filed with the SEC.

We have filed with the SEC a registration statement on Form S-3, including all amendments, exhibits, annexes and schedules thereto and all documents incorporated by reference therein, pursuant to the Securities Act, and the rules and regulations promulgated thereunder, with respect to the securities offered hereby. This prospectus, which constitutes a part of the registration statement, does not contain all the information contained in the registration statement, parts of which are omitted in accordance with the rules and regulations of the SEC. The full registration statement may be obtained from the SEC or us as provided above.

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TABLE OF CONTENTS

$500,000,000 Waste Connections, Inc. 5.250% Senior Notes due 2035 PROSPECTUS SUPPLEMENT Joint Book-Running Managers

| ​ | BofA Securities | ​ | ​ | J.P. Morgan | ​ | ​ | PNC Capital Markets LLC | ​ | ​ | Truist Securities | ​ |

| ​ | Mizuho | ​ | ​ | Scotiabank | ​ | ​ | TD Securities | ​ | ​ | US Bancorp | ​ | ​ | CIBC Capital Markets | ​ |

Co-Managers Huntington Capital Markets Fifth Third Securities Zions Capital Markets May 28, 2025