Exhibit 99.1

Suncor Energy reports first quarter 2025 results

Unless otherwise noted, all financial figures are unaudited, presented in Canadian dollars (Cdn$), and derived from the company’s condensed consolidated financial statements which are based on Canadian generally accepted accounting principles (GAAP), specifically International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB), and are prepared in accordance with International Accounting Standard (IAS) 34 Interim Financial Reporting. Production volumes are presented on a working-interest basis, before royalties, except for production values from the company's Libya operations, which are presented on an economic basis. Certain financial measures referred to in this news release (adjusted funds from operations, adjusted operating earnings, free funds flow and net debt) are not prescribed by Canadian generally accepted accounting principles (GAAP). See the Non-GAAP Financial Measures section of this news release. References to Oil Sands operations exclude Suncor Energy Inc.’s ownership of Fort Hills and interest in Syncrude.

Calgary, Alberta (May 6, 2025)

First Quarter Highlights

“Our strong first quarter financial and operating performance maintained the momentum established in 2024, as we remain laser focused on continuing to deliver safe, reliable, and cost-effective operations. Our results demonstrate this commitment, as represented by record performance across both the upstream and downstream,” said Rich Kruger, Suncor’s President and Chief Executive Officer. “Our focus on the fundamentals, integrated business model, and continually improving cost structure enable us to deliver free funds flow and shareholder value despite the current volatile business environment.”

First Quarter Results

Financial Results

Adjusted Operating Earnings Reconciliation(1)

Operating Results

Corporate and Strategy Updates

Corporate Guidance Updates

There have been no changes to the 2025 corporate guidance ranges previously issued on December 12, 2024.

For further details and advisories regarding Suncor’s 2025 corporate guidance, see www.suncor.com/guidance.

Non-GAAP Financial Measures

Certain financial measures in this news release – namely adjusted funds from operations, adjusted operating earnings, free funds flow and net debt, and related per share or per barrel amounts – are not prescribed by GAAP. These non-GAAP financial measures are included because management uses the information to analyze business performance, leverage and liquidity, as applicable, and it may be useful to investors on the same basis. These non-GAAP financial measures do not have any standardized meaning and, therefore, are unlikely to be comparable to similar measures presented by other companies. Therefore, these non-GAAP financial measures should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP. Except as otherwise indicated, these non-GAAP financial measures are calculated and disclosed on a consistent basis from period to period. Specific adjusting items may only be relevant in certain periods.

Adjusted Operating Earnings

Adjusted operating earnings is a non-GAAP financial measure that adjusts net earnings for significant items that are not indicative of operating performance. Management uses adjusted operating earnings to evaluate operating performance because management believes it provides better comparability between periods. Adjusted operating earnings are reconciled to net earnings in the news release above.

Adjusted Funds From (Used In) Operations

Adjusted funds from (used in) operations is a non-GAAP financial measure that adjusts a GAAP measure – cash flow provided by operating activities – for changes in non-cash working capital, which management uses to analyze operating performance and liquidity. Changes to non-cash working capital can be impacted by, among other factors, commodity price volatility, the timing of offshore feedstock purchases and payments for commodity and income taxes, the timing of cash flows related to accounts receivable and accounts payable, and changes in inventory, which management believe reduces comparability between periods.

Free Funds Flow

Free funds flow is a non-GAAP financial measure that is calculated by taking adjusted funds from operations and subtracting capital expenditures, including capitalized interest. Free funds flow reflects cash available for increasing distributions to shareholders and reducing debt. Management uses free funds flow to measure the capacity of the company to increase returns to shareholders and to grow Suncor’s business.

Net Debt and Total Debt

Net debt and total debt are non-GAAP financial measures that management uses to analyze the financial condition of the company. Total debt includes short-term debt, current portion of long-term debt and long-term debt (all of which are GAAP measures). Net debt is equal to total debt less cash and cash equivalents (a GAAP measure).

Legal Advisory – Forward-Looking Information

This news release contains certain forward-looking information and forward-looking statements (collectively referred to herein as “forward-looking statements”) and other information based on Suncor’s current expectations, estimates, projections and assumptions that were made by the company in light of information available at the time the statement was made and consider Suncor’s experience and its perception of historical trends, including expectations and assumptions concerning: the accuracy of reserves estimates; commodity prices and interest and foreign exchange rates; the performance of assets and equipment; uncertainty related to geopolitical conflict; capital efficiencies and cost savings; applicable laws and government policies; future production rates; the sufficiency of budgeted capital expenditures in carrying out planned activities; the availability and cost of labour, services and infrastructure; the satisfaction by third parties of their obligations to Suncor; the development and execution of projects; and the receipt, in a timely manner, of regulatory and third-party approvals. All statements and information that address expectations or projections about the future, and other statements and information about Suncor’s strategy for growth, expected and future expenditures or investment decisions, commodity prices, costs, schedules, production volumes, operating and financial results, future financing and capital activities, and the expected impact of future commitments are forward-looking statements. Some of the forward-looking statements may be identified by words like “expects”, “anticipates”, “will”, “estimates”, “plans”, “scheduled”, “intends”, “believes”, “projects”, “indicates”, “could”, “focus”, “vision”, “goal”, “outlook”, “proposed”, “target”, “objective”, “continue”, “should”, “may”, “future”, “potential”, “opportunity”, “would”, “priority”, “strategy” and similar expressions. Forward-looking statements in this news release include references to: Suncor's strategy, focus, goals and priorities and the expected benefits therefrom, and the anticipated return to normal production at White Rose in in the second quarter. In addition, all other statements and information about Suncor’s strategy for growth, expected and future expenditures or investment decisions, commodity prices, costs, schedules, production volumes, operating and financial results and the expected impact of future commitments are forward-looking statements. Some of the forward-looking statements and information may be identified by words like “expects”, “anticipates”, “will”, “estimates”, “plans”, “scheduled”, “intends”, “believes”, “projects”, “indicates”, “could”, “focus”, “vision”, “goal”, “outlook”, “proposed”, “target”, “objective”, “continue”, “should”, “may” and similar expressions.

Forward-looking statements are based on Suncor’s current expectations, estimates, projections and assumptions that were made by the company in light of its information available at the time the statement was made and consider Suncor’s experience and its perception of historical trends, including expectations and assumptions concerning: the accuracy of reserves estimates; commodity prices and interest and foreign exchange rates; the performance of assets and equipment; capital efficiencies and cost savings; applicable laws and government policies; future production rates; the sufficiency of budgeted capital expenditures in carrying out planned activities; the availability and cost of labour, services and infrastructure; the satisfaction by third parties of their obligations to Suncor; the development and execution of projects; and the receipt, in a timely manner, of regulatory and third-party approvals.

Forward-looking statements and information are not guarantees of future performance and involve a number of risks and uncertainties, some that are similar to other oil and gas companies and some that are unique to Suncor. Suncor’s actual results may differ materially from those expressed or implied by its forward-looking statements, so readers are cautioned not to place undue reliance on them.

Suncor’s Annual Information Form, Annual Report to Shareholders and Form 40-F, each dated February 26, 2025, Suncor’s Report to Shareholders for the First Quarter of 2025 dated May 6, 2025, and other documents it files from time to time with securities regulatory authorities describe the risks, uncertainties, material assumptions and other factors that could influence actual results and such factors are incorporated herein by reference. Copies of these documents are available by referring to suncor.com/FinancialReports or on SEDAR+ at sedarplus.ca or EDGAR at sec.gov. Except as required by applicable securities laws, Suncor disclaims any intention or obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

To view a full copy of Suncor’s first quarter 2025 Report to Shareholders and the financial statements and notes (unaudited), visit Suncor's profile on sedarplus.ca or sec.gov or visit Suncor’s website at suncor.com/financialreports.

To listen to the conference call discussing Suncor's first quarter results, visit suncor.com/webcasts.

Suncor Energy is Canada's leading integrated energy company. Suncor's operations include oil sands development, production and upgrading; offshore oil production; petroleum refining in Canada and the U.S.; and the company’s Petro-CanadaTM retail and wholesale distribution networks (including Canada’s Electric HighwayTM, a coast-to-coast network of fast-charging EV stations). Suncor is developing petroleum resources while advancing the transition to a lower-emissions future through investments in lower emissions intensity power, renewable feedstock fuels and projects targeting emissions intensity. Suncor also conducts energy trading activities focused primarily on the marketing and trading of crude oil, natural gas, byproducts, refined products and power. Suncor's common shares (symbol: SU) are listed on the Toronto and New York stock exchanges.

For more information about Suncor, visit our web site at suncor.com All financial figures are unaudited and presented in Canadian dollars unless noted otherwise.

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