Waste Connections, Inc.

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Insider Trading Policy

We have adopted an Insider Trading Policy that governs the purchase, sale, gifting, and/or other dispositions of securities by our directors, executive officers, and employees and other covered persons that is designed to promote compliance with insider trading laws, rules and regulations, and the exchange listing standards applicable to us. Our Insider Trading Policy also governs the adoption, amendment, and termination of 10b5-1 trading plans by our Board of Directors, executive officers, and other employees and is designed to ensure compliance with applicable insider trading laws, rules, and regulations.

Our Insider Trading Policy, which is overseen by the Board under our Corporate Governance Guidelines and Board Charter, prohibits our directors and officers from engaging in short sales of Company securities or purchasing financial instruments, or otherwise engaging in transactions that hedge or offset, or are designed to hedge or offset, any decrease in the market value of Company securities held, directly or indirectly, by them, regardless of the purpose for any such proposed transaction. Our Insider Trading Policy also prohibits our directors and officers from holding Company securities in a margin account or pledging Company securities as collateral for a loan, regardless of the purpose of any such proposed transaction, unless preauthorized to do so in certain limited situations.

Our directors, executive officers and certain other selected employees are required to pre-clear all proposed transactions in Company securities with our President and Chief Executive Officer, our Chief Financial Officer or our General Counsel to confirm that such trade is not made in a trading blackout period or when in possession of material non-public information.

Our Insider Trading Policy is included as an exhibit to the Form 10-K we filed with the SEC and the securities commissions and similar regulatory authorities in Canada on February 12, 2026.

Although the Insider Trading Policy does not apply to the Company itself, all transactions in Company securities and use of 10b5-1 plans by the Company are executed in compliance with all applicable securities laws and regulations.

Code of Conduct and Ethics

We have adopted a Code of Conduct and Ethics that applies to all of our directors, officers and employees. The Nominating and Corporate Governance Committee is responsible for ensuring the Company implements good corporate governance practices, including compliance with the Code of Conduct and Ethics. Directors who have, or who may be reasonably perceived to have, a personal or related-party interest in a transaction or agreement being contemplated by the Company are required to declare such interest at any meeting at which the matter is being considered and, when appropriate, will leave the meeting during discussion and abstain from voting on such matter. The Nominating and Corporate Governance Committee is responsible for the review and annual updates to our Code of Conduct and Ethics.

2026 Proxy • Waste Connections, Inc.17