Arcadis NV — Interim / Quarterly Report 2026

Apr 30, 2026

Arcadis Q1 2026 Trading Update

30 April 2026

PART 1

Trading Update

Heather Polinsky CEO Nominee

Executive team's top priorities for 2026

Capital Markets Day

29 September 2026, Arcadis Headquarters | CubeHouse, Amsterdam

Strong order intake and margin expansion Trading Update

First quarter results

Net Revenues

Operating EBITA Margin1)

€933M Organic growth2): 0.8% €1.1B Organic growth2): 7.3% 11.0% (Q1'25: 10.9%)

• ✓ Systematically executing the strategic plan to get back to growth and improve profitability
• ✓ Actions on track; execution progressing as planned

1) EBITA excluding restructuring, integration, acquisition & divestment costs

2) Underlying growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments.

Backlog increased across all GBAs Trading Update

Order Intake and Backlog Organic Growth qtd1)

Backlog Growth per GBA, qtd1)

Mobility 6.9% Places 3.1% Resilience 5.1%

1) Underlying growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments. 2) Book-to-bill: Order intake / Net revenues

Order intake highlights

Resilience

• BtB2) 1.16x driven by Water, Climate (US, NL) and Environmental Restoration (Brazil)
• Growing pipeline opportunities in US Environmental Restoration and UK in Energy

Places

• BtB 1.18x driven by Data Centers (UK & US), and Government Clients (US & Europe)
• Property & Investment challenging in Canada

Mobility

• BtB 1.25x driven by project extensions in US, Canada and UK
• Significant pipeline opportunities in US, Canada and in Germany following last year's rail acquisition

€ millions, %

Global Business Area: Resilience

Continued strong demand for Water and Energy solutions

Q1 2026 Net Revenue Organic growth1)

• Strong 15% growth in US Water Optimization: deep technical expertise, effective AI-integration
• UK AMP8 projects gaining momentum

• Continued very strong growth from large transmission, distribution and grid readiness programs for leading clients in Germany and NL

Environmental Restoration

• Managing large US contract wind-down through diversification
• Higher-value pipeline opportunities in the US, driven by power, energy and rising PFAS demand

3.5% ✓ Backlog growth driven hires

✓ Account leadership changes and Account Leader Training

Q1 WIN:

City of Los Angeles, US: Three key stormwater initiatives for the through their Clean Water Program

1) Organic growth: Underlying year on year Net Revenue growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments

Global Business Area: Places

Progress on restructuring and repositioning to address challenges in Property & Investment market

Q1 2026 Net Revenue Organic growth1) -6.0%

Industrial Manufacturing

Government & Public Facilities

Property & Investment (P&I)

• Growth in US pharma supported by onshoring investments
• Strong data centers: 36% growth yoy
• Large semiconductor contract winddown
• Growth in the UK driven by investments in healthcare, education, and prison facilities
• -15% organic net revenue growth yoy due to challenging markets in Canada and China

1) Organic growth: Underlying year on year Net Revenue growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments

• ✓ Rightsizing P&I in Canada and China: 150 people out in Q1'26, leadership changes
• ✓ Repositioning business in Canada to growth markets
• ✓ Hiring in data centers, life sciences
• ✓ Scaling GECs

Q1 WIN:

Government client, UK: £250m framework delivering data-driven design, engineering, consultancy services across largest public sector programs

Global Business Area: Mobility

Strong growth driven by North America

Q1 2026 Net Revenue Organic growth1)

• 6.5% ✓ Hiring to meet backlog and
• Strong growth from large Key Clients
• Increased road and port activity drives pipeline

• Strong growth in Germany driven by synergy wins following acquisition last year
• Key Clients in the Netherlands driving growth

• Australia turning to growth from high work volume on large contracts

• UK: less impact from HS2 contract wind down, improving rail market momentum

• 1) Organic growth: Underlying year on year Net Revenue growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments

• ✓ Extensions on large programs driving growth, supported by delivery focus

  • ✓ Focused on diversifying Australia business

pipeline demand in key areas

Q1 WIN:

TransPennine Route Upgrade in the UK: Construction management to modernize major rail corridors

Spotlight: AI in Water & Climate

Pioneering Water & Climate solutions: leveraging digital and AI Innovations with our clients

Pioneer in Water & Climate Technologies

Supporting water utilities in their AI transition

✓ AI for Water Revenue >€100M

Product Enterprise Decision Analytics Supporting lead service line replacement in US, live across 22 utilities Impact Partnership Voda.ai Product Climate Risk Nexus AI-based hydrologic flow prediction for a major North American freight rail operator Impact Advisory & thought leadership AI for Water Advising clients on data strategies and roadmaps Highlights ✓ 45 AI workshops with utility clients

✓ 50-60% reduction in excavation costs for lead service line replacement programs

✓ Enabling highly targeted resilience investment: identifying 2% of assets driving 80% of risk

© Arcadis 2026 | Arcadis Q1 2026 Trading Update 9

Repositioning to capture growth and building operational scale to drive competitiveness

	Delivered in Q1	Ongoing for 2026
Focusfor growth	✓Investments into key growth markets,senior hires and new appointments✓Pricing diagnostics✓AI studio launched	❑Complete portfolioreview and focus investments onhighest return and right to win areas❑Scale digitally-enabled services❑Optimize pricing strategiesto win in priority areas
Simple, futureproof model	✓Shift to industry/sector focus✓Ongoing rightsizing✓Simplify decision authorities✓Ongoing transformation of project pursuitprocess and other workflows with AI	❑Reorientate to sectors to strengthen client centricity❑Standardize and simplifyto drive efficiency❑Digitize and automate in core processesto drive productivity
Drive culturalchange	✓Leadership changes✓Stronger leadership presence andfocus on Key Clients and performance✓Stronger sales incentives✓Tighter commercial and financialcontrols	❑Strengthen leadership and talent❑Sharpen incentives and performance management❑Embraceentrepreneurship and a client-centric mindsetinour leaders

PART 2

Financial Results

Simon Crowe CFO

Growth in Resilience and Mobility offset by Places Margin benefiting from cost out programs Financial Performance

Q1 2026 Net Revenues

0.8% Organic growth1)

• Growth driven by key markets in US, Canada and Europe, largely offset by ongoing challenges in Property & Investment, particularly in Canada and China
• Growth excluding Property & Investment stepping up to 2.3% (Q4'25: 0.6%)

Q1 2026 Operating EBITA Margin2)

• Margin supported by cost out program impacting enabling functions and people in underperforming markets
• Non-operating costs: €15 million
  • -153 people from underperforming areas
  • -84 people from overhead functions

Financial Performance

Free cash flow performance in line with season pattern

Free Cash Flow (FCF)1) € millions

Days Sales Outstanding and Net Working Capital % Days, %

Q4'24 Q1'25 Q2'25 Q3'25 Q4'25 Q1'26

Q1 2026 FCF

• In line with seasonality
• Continued discipline on billing and cash collection

Net Debt and Leverage2) € million

Net debt

• Within strategic range of 1.5-2.5x
• Investment grade rating reaffirmed: BBB-

1) Free Cash Flow = Cash flow from operating activities corrected for capex and lease liabilities 2) Leverage = Net Debt / Operating EBITDA

Strategic actions driving 2026 margin expansion Financial Performance

Operating EBITA Margin1) levers

1) EBITA excluding restructuring, integration, acquisition & divestment costs

• Cost-out program benefit of 40-50bps:
  • Corporate restructuring: -100 in Q4'25, -84 in Q1'26
  • Disciplined opex management: reduction in travel and advisory costs
• Rightsizing targeting areas of low billability
• Improved project margins driven by Global Excellence Centers (GEC) contribution, automation and project selectivity
• Investments in automation and standardization

PART 3

Wrap up

Heather Polinsky CEO Nominee

Relentless execution of 2026 priorities to drive: focus, simplification and performance culture

Encouraging momentum

• Good order intake across all GBAs
• Growth step up led by high growth markets in Mobility and Resilience
• Margin improvement supported by cost out program and rightsizing
• Increased macroeconomic uncertainty
• 2026 guidance unchanged

Executing 2026 priorities

• Refocusing business to high growth markets through investments
• Addressing underperforming areas through ongoing restructuring and cost actions
• Investing in digital and AI embedded solutions built on our deep asset knowledge & trusted client relationships
• Capital Markets Day in September

Appendix

Appendix

Quarterly trend for Free Cash Flow, Net Debt and Net Working Capital %

Net Revenues Geographical Breakdown Appendix

Net Revenues Q1'26

as % of total Arcadis

Geographical breakdown per GBA Net Revenues Q1'26

Disclaimer

Statements included in this presentation that are not historical facts (including any statements concerning investment objectives, other plans and objectives of management for future operations or economic performance, or assumptions or forecasts related there to) are forwardlooking statements. These statements are only predictions and are not guarantees. Actual events or the results of our operations could differ materially from those expressed or implied in the forward-looking statements. Forward-looking statements are typically identified by the use of terms such as "may," "will", "should", "expect", "could", "intend", "plan", "anticipate", "estimate", "believe", "continue", "predict", "potential" or the negative of such terms and other comparable terminology.

The forward-looking statements are based upon our current expectations, plans, estimates, assumptions and beliefs that involve numerous risks and uncertainties. Assumptions relating to the foregoing involve judgments with respect to, among other things, future economic, competitive and market conditions and future business decisions, all of which are difficult or impossible to predict accurately and many of which are beyond our control. Although we believe that the expectations reflected in such forward-looking statements are based on reasonable assumptions, our actual results and performance could differ materially from those set forth in the forward-looking statements.