WASTE CONNECTIONS REPORTS THIRD QUARTER 2026 RESULTS AND RAISES FULL YEAR OUTLOOK

• Strong execution, improving solid waste landfill volumes and further strength in commodity-related revenues drive outsized results and another increase to full year outlook
• Revenue of $2.638 billion, exceeding expectations
• Net income of $359.2 million, and adjusted EBITDA* of $895.8 million, or 34.0% of revenue, above expectations
• Net income and adjusted net income* of $1.43 and $1.58 per share, respectively
• Year to date closed acquisitions of approximately $130 million in annualized revenues
• Increases regular quarterly dividend by 10% and completes year to date share repurchases of over $1 billion
• Second increase to full year 2026 outlook for revenue and adjusted EBITDA*

THE WOODLANDS, TX, October 21, 2026 - Waste Connections, Inc. (TSX/NYSE: WCN) (“Waste Connections” or the “Company”) today announced its results for the third quarter of 2026.

"Another top to bottom beat in the period was driven by continued strength in operational execution along with improving trends in landfill activity and commodity-driven revenue. Sequential improvement of 70 basis points in solid waste unit volumes was led by an uptick in landfill volumes, with operating results continuing to reflect the benefits of elevated employee retention and record safety performance,” said Ronald J. Mittelstaedt, President and Chief Executive Officer.

"Most importantly, we overcame a late quarter surge in diesel pricing to deliver adjusted EBITDA margin* of 34% on underlying margin expansion of 50 basis points,” continued Mr. Mittelstaedt. “Our performance puts us firmly on track to exceed the increased full year 2026 outlook we provided in July for revenue and adjusted EBITDA*, and we remain positioned to deliver double-digit growth in adjusted free cash flow* of at least $1.4 billion. Additional acquisitions completed later this year, and further improvement in E&P waste activity or other commodity-driven revenues, would provide incremental benefit."

Mr. Mittelstaedt continued, "As anticipated, the strength of our operating performance, free cash flow generation and balance sheet positioned us for another double-digit annual increase in our quarterly cash dividend, our sixteenth in a row. Additionally, we continued our opportunistic share repurchases, bringing year to date outlays to over $1 billion for 2.5% of outstanding shares, demonstrating once again our ability to fund our differentiated growth strategy and acquisition activity, along with record return of capital to shareholders."

Q3 2026 Results

Revenue in the third quarter totaled $2.638 billion, up from $2.458 billion in the year ago period. Operating income was $541.7 million, which included $3.0 million in transaction-related expenses and $1.9 million in impairments and other operating items, partially offset by $0.6 million associated with fair value changes to equity awards. This compares to operating income of $439.6 million in the third quarter of 2025 that included $63.5 million primarily from the write-down of contracts and a non-operating E&P waste facility permit, an environmental liability at an operating facility and transaction-related expenses. Net income in the third quarter was $359.2 million, or $1.43 per share on a diluted basis of 251.9 million shares. In the year ago period, the Company reported net income of $286.3 million, or $1.11 per share on a diluted basis of 257.6 million shares.

Adjusted net income* in the third quarter was $398.9 million, or $1.58 per diluted share, versus $372.0 million, or $1.44 per diluted share, in the prior year period. Adjusted EBITDA* in the third quarter was $895.8 million, as compared to $830.3 million in the prior year period. Adjusted net income, adjusted net income per diluted share and adjusted EBITDA, all non-GAAP measures, primarily exclude impairments and acquisition-related items, as reflected in the detailed reconciliations in the attached tables.

Nine Months Year to Date Results

For the nine months ended September 30, 2026, revenue was $7.570 billion, up from $7.094 billion in the year ago period. Operating income was $1.343 billion, which included $139.9 million from impairments and other operating items and $13.0 million in transaction-related expenses, partially offset by $1.8 million associated with fair value changes to equity awards. This compares to operating income in the prior year period of $1.289 billion, which included $70.6 million from impairments and other operating items and $20.3 million primarily attributable to transaction-related expenses and fair value changes to equity awards.

Net income for the nine months ended September 30, 2026 was $875.0 million, or $3.45 per share on a diluted basis of 253.9 million shares. In the year ago period, the Company reported net income of $818.1 million, or $3.16 per share on a diluted basis of 258.5 million shares.

Adjusted net income* for the nine months ended September 30, 2026 was $1.095 billion, or $4.32 per diluted share, compared to $998.3 million, or $3.86 per diluted share, in the year ago period. Adjusted EBITDA* for the nine months ended September 30, 2026 was $2.505 billion, as compared to $2.329 billion in the prior year period.

Updated 2026 Outlook

Waste Connections also updated its outlook for 2026, which assumes no change in the current economic environment or underlying economic trends. The Company’s outlook excludes any impact from additional acquisitions that may close during the year, and expensing of transaction-related items. The outlook provided below is forward looking, and actual results may differ materially depending on risks and uncertainties detailed at the end of this release and in our periodic filings with the U.S. Securities and Exchange Commission and the securities commissions or similar regulatory authorities in Canada. Certain components of the outlook for 2026 are subject to quarterly fluctuations. See reconciliations in the attached tables.

• Revenue is estimated to be approximately $10.09 billion;
• Net income is estimated to be approximately $1.18 billion, and adjusted EBITDA* is estimated to be approximately $3.345 billion;
• Capital expenditures are estimated to be approximately $1.25 billion; and
• Net cash provided by operating activities is estimated to be between $2.64 billion and $2.69 billion, and adjusted free cash flow* is estimated to be between $1.40 billion and $1.45 billion.

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* A non-GAAP measure; see accompanying Non-GAAP Reconciliation Schedule

Q3 2026 Earnings Conference Call

Waste Connections will be hosting a conference call related to third quarter earnings on October 22nd at 8:30 A.M. Eastern Time. A live audio webcast of the conference call can be accessed by visiting investors.wasteconnections.com and selecting "Events & Presentations" from the website menu. Alternatively, conference call participants can preregister by clicking here. Registered participants will receive dial-in instructions and a personalized code for entry to the conference call. Shortly after the conclusion of the conference call, a webcast replay will be available on the Waste Connections investor website or by clicking here.

About Waste Connections

Waste Connections is an integrated solid waste services company that provides non-hazardous waste collection, transfer and disposal services, including by rail, along with resource recovery primarily through recycling and renewable fuels generation. The Company serves approximately nine million residential, commercial and industrial customers in mostly exclusive and secondary markets across 46 states in the U.S. and six provinces in Canada. Waste Connections also provides non-hazardous oilfield waste treatment, recovery and disposal services in several basins across the U.S. and Canada. Waste Connections views its sustainability efforts as integral to its business, with initiatives consistent with its objective of long-term value creation and focused on reducing emissions, increasing resource recovery of both recyclable commodities and clean energy fuels, reducing reliance on off-site disposal for landfill leachate, further improving safety and enhancing employee engagement. Visit wasteconnections.com/sustainability for more information and updates on our progress towards targeted achievement.

Safe Harbor and Forward-Looking Information

This press release contains forward-looking statements within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995 ("PSLRA"), including "forward-looking information" within the meaning of applicable Canadian securities laws. These forward-looking statements are neither historical facts nor assurances of future performance and reflect Waste Connections' current beliefs and expectations regarding future events and operating performance. These forward-looking statements are often identified by the words "may," "might," "believes," "thinks," "expects," "estimate," "continue," "intends" or other words of similar meaning. All of the forward-looking statements included in this press release are made pursuant to the safe harbor provisions of the PSLRA and applicable securities laws in Canada. Forward-looking statements involve risks and uncertainties. Forward-looking statements in this press release include, but are not limited to, statements about expected 2026 financial results, outlook and related assumptions, and potential acquisition activity. Important factors that could cause actual results to differ, possibly materially, from those indicated by the forward-looking statements include, but are not limited to, risk factors detailed from time to time in the Company's filings with the SEC and the securities commissions or similar regulatory authorities in Canada. You should not place undue reliance on forward-looking statements, which speak only as of the date of this press release. Waste Connections undertakes no obligation to update the forward-looking statements set forth in this press release, whether as a result of new information, future events, or otherwise, unless required by applicable securities laws.

– financial tables attached –

CONTACT:

Mary Anne Whitney / (832) 442-2253 Joe Box / (832) 442-2153

maryannew@wasteconnections.com joe.box@wasteconnections.com

Waste Connections, Inc.

CONDENSED Consolidated Statements of NET INCOME

THRee AND NINE months ended SEPTEMBER 30, 2025 and 2026

(Unaudited)

(in thousands of U.S. dollars, except share and per share amounts)

Waste Connections, Inc.

Condensed Consolidated Balance Sheets

(Unaudited)

(in thousands of U.S. dollars, except share and per share amounts)

Waste Connections, Inc.

Condensed Consolidated Statements of Cash Flows

NINE months ended SEPTEMBER 30, 2025 and 2026

(Unaudited)

(in thousands of U.S. dollars)

ADDITIONAL STATISTICS

(in thousands of U.S. dollars, except where noted)

Solid Waste Internal Growth: The following table reflects a breakdown of the components of our solid waste internal growth for the three and nine month periods ended September 30, 2026:

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(a) In the first quarter of 2026, WCN began providing a breakdown of organic growth in solid waste collection, transfer and disposal to include Yield and Unit Volume, which are performance metrics used by management to evaluate the effectiveness of our pricing and organic growth strategies. Yield, or change in average price per unit of service, reflects the impacts of customer churn and new business activity and the resulting mix by line of business and by geographic segment; Unit Volume reflects estimated change in units of activity.

(b) Core Price is defined as the revenue growth attributable to price increases, net of rollbacks, on solid waste collection, transfer and disposal customers. This definition is consistent with Core Price references provided in prior periods.

Revenue Breakdown: The following table reflects a breakdown of our revenue for the three month periods ended September 30, 2025 and 2026:

ADDITIONAL STATISTICS (continued)

(in thousands of U.S. dollars, except where noted)

Contribution from Acquisitions: The following table reflects revenues from acquisitions, net of divestitures, closed during or subsequent to the prior periods:

Other Cash Flow Items: The following table reflects cash interest and cash taxes for the three and nine month periods ended September 30, 2025 and 2026:

Debt to Book Capitalization as of September 30, 2026: 54%

Internalization for the three months ended September 30, 2026: 58%

Days Sales Outstanding for the three months ended September 30, 2026: 39 (23 net of deferred revenue)

Share Information for the three months ended September 30, 2026:

NON-GAAP RECONCILIATION SCHEDULE

(in thousands of U.S. dollars, except where noted)

Reconciliation of Adjusted EBITDA:

Adjusted EBITDA, a non-GAAP financial measure, is provided supplementally because it is widely used by investors as a performance and valuation measure in the solid waste industry. Management uses adjusted EBITDA as one of the principal measures to evaluate and monitor the ongoing financial performance of Waste Connections’ operations. Waste Connections defines adjusted EBITDA as net income, plus income tax provision, plus interest expense, less interest income, plus depreciation and amortization expense, plus closure and post-closure accretion expense, plus or minus any loss or gain on impairments and other operating items, plus other expense, less other income. Waste Connections further adjusts this calculation to exclude the effects of other items management believes impact the ability to assess the operating performance of its business. This measure is not a substitute for, and should be used in conjunction with, GAAP financial measures. Other companies may calculate adjusted EBITDA differently.

____________________________

(a) Reflects the addback of acquisition-related transaction costs.

(b) Reflects fair value accounting changes associated with certain equity awards.

NON-GAAP RECONCILIATION SCHEDULE (continued)

(in thousands of U.S. dollars, except where noted)

Reconciliation of Adjusted Free Cash Flow:

Adjusted free cash flow, a non-GAAP financial measure, is provided supplementally because it is widely used by investors as a liquidity measure in the solid waste industry. Waste Connections calculates adjusted free cash flow as net cash provided by operating activities, plus or minus change in book overdraft, plus proceeds from disposal of assets, less capital expenditures for property and equipment. Waste Connections further adjusts this calculation to exclude the effects of items management believes impact the ability to evaluate the liquidity of its business operations. This measure is not a substitute for, and should be used in conjunction with, GAAP liquidity or financial measures. This measure is not meant to represent residual cash available for strategic acquisitions, stock repurchases, dividends or other discretionary expenditures since it does not adjust for mandatory debt service requirements and other non-discretionary expenditures. Other companies may calculate adjusted free cash flow differently.

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(a) Reflects the addback of acquisition-related transaction costs.

(b) Reflects the cash component of severance expense associated with an executive departure from 2023.

(c) Reflects the addback of acquisition-related payments for contingent consideration that were recorded as expenses in earnings and as a component of cash flows from operating activities as the amounts paid exceeded the fair value of the contingent consideration recorded at the acquisition date.

(d) Reflects the cash settlement of pre-existing Progressive Waste share-based awards during the period.

(e) The aggregate tax effect of footnotes (a) through (d) is calculated based on the applied tax rates for the respective periods.

NON-GAAP RECONCILIATION SCHEDULE (continued)

(in thousands of U.S. dollars, except per share amounts)

Reconciliation of Adjusted Net Income and Adjusted Net Income per Diluted Share:

Adjusted net income and adjusted net income per diluted share, both non-GAAP financial measures, are provided supplementally because they are widely used by investors as valuation measures in the solid waste industry. Management uses adjusted net income and adjusted net income per diluted share as one of the principal measures to evaluate and monitor the ongoing financial performance of Waste Connections’ operations. Waste Connections provides adjusted net income to exclude the effects of items management believes impact the comparability of operating results between periods. Adjusted net income has limitations due to the fact that it excludes items that have an impact on the Company’s financial condition and results of operations. Adjusted net income and adjusted net income per diluted share are not a substitute for, and should be used in conjunction with, GAAP financial measures. Other companies may calculate these non-GAAP financial measures differently.

____________________________

(a) Reflects the elimination of the non-cash amortization of acquisition-related intangible assets.

(b) Reflects the addback of impairments and other operating items.

(c) Reflects the addback of acquisition-related transaction costs.

(d) Reflects fair value accounting changes associated with certain equity awards.

(e) The aggregate tax effect of the adjustments in footnotes (a) through (d) is calculated based on the applied tax rates for the respective periods.

UPDATED 2026 OUTLOOK

NON-GAAP RECONCILIATION SCHEDULE

(in thousands of U.S. dollars, except where noted)

Reconciliation of Adjusted EBITDA:

____________________________

(a) Approximately 22.1% full year effective tax rate, including amounts reported for the nine month period ended September 30, 2026.

(b) Reflects amounts reported for the nine month period ended September 30, 2026, as shown on page 9.

Reconciliation of Adjusted Free Cash Flow:

____________________________

(a) Reflects amounts reported for the nine month period ended September 30, 2026, as shown on page 10.