STN · Stantec Inc.

This 6-K filing announces the release of Stantec’s 19th annual Sustainability Report, which serves as a material disclosure of the firm’s ESG performance and strategy execution. The report quantifies sustainability-driven revenue at C$5.5 billion (68% of total gross revenue) for the year ended December 31, 2025 — a metric explicitly tracked since 2019 and now showing steady growth from 43%. While not an earnings or financial statement filing, this disclosure provides investors with a validated, trended indicator of how core service offerings align with global sustainability demand drivers, including climate transition, infrastructure resilience, and UN SDG-aligned projects. The A- CDP score, fourth-year operational carbon neutrality, and GRI/SASB compliance further substantiate reporting rigor and institutional credibility. Though no forward-looking financial guidance or capital allocation changes are disclosed, the sustained revenue concentration in sustainability work signals strategic prioritization and may influence long-term valuation multiples for ESG-sensitive investors. The absence of financial results, executive changes, or transactions means this is a non-catalytic but materially informative update on business model evolution.