Amsterdam, July 30, 2026 – Arcadis (EURONEXT: ARCAD) (the “Company”) the world’s leading company delivering data-driven sustainable design, engineering, and consultancy solutions for natural and built assets, announces that its Executive Board and Supervisory Board (the "Boards") have unanimously rejected a second unsolicited, conditional, and non-binding proposal from WSP Global Inc. ("WSP") to acquire the entire issued and outstanding ordinary share capital of Arcadis for a consideration of €51.50 per ordinary share in cash and WSP stock (the “Revised Proposal”).

After a thorough review with their financial and legal advisers, the Boards concluded that the Revised Proposal, which followed the unanimous rejection of an earlier unsolicited, conditional, and non-binding proposal at €48.50 per ordinary share, continues to fundamentally undervalue Arcadis’ intrinsic value, strategic position, and future prospects. Accordingly, it is not in the best interest of the Company’s shareholders, employees, clients and other stakeholders.

The Boards determined that the Revised Proposal is not in the best interest of the Company and its stakeholders for the following main reasons:

• Fundamental Undervaluation: The Revised Proposal fundamentally undervalues Arcadis and again fails to reflect the substantial value creation potential from the execution of Arcadis’ standalone strategy, supported by the Company’s current operational momentum and the new medium-term financial targets published today alongside our Q2 and Half Year 2026 Results.
• Large Stock Component: Approximately 50% of the consideration consists of WSP shares. This meaningful stock component represents a materially different risk profile to our shareholders compared to a standalone Arcadis investment, including significantly higher than anticipated leverage and lower than expected dividend yield.
• Execution Risks: The Revised Proposal entails material uncertainty regarding deal execution and timing, execution of strategic plans, cultural fit, and integration risks, with adverse consequences for Arcadis' shareholders, employees, clients and other stakeholders.

Heather Polinsky, CEO of Arcadis, commented: "Our H1 2026 performance demonstrates that our growth trajectory is moving in the right direction. With a record backlog and clear momentum in our key markets, we are confident that our standalone strategy is the most effective path to creating value for our shareholders and stakeholders as we deliver on our stated medium-term financial targets."