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1 Strong momentum for the next phase of profitable growth: strategic targets in place for 2027-2029 30 July 2026 Arcadis Q2 and Half Year 2026 Results and 2027-2029 Strategy
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Strategic and Operational Overview PART 1 Heather Polinsky CEO 2© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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1) Underlying growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments. 2) EBITA excluding restructuring, integration, acquisition & divestment costs Growth acceleration underway © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Second Quarter Results -0.2% 1.0% 0.6%2) 0.8% 2.2% Q2'25 Q3'25 Q4'25 Q1'26 Q2'26 11.3% 11.4% Q2'25 Q2'26 Net Revenues, yoy Organic Growth Trend1) €974M2.2% Order Intake, yoy Op. EBITA Margin 11.4% €1.1B13.5% 1)1) 2) 3
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1) Underlying growth excluding impact of FX, acquisitions, footprint reductions, wind-downs or divestments. 2) EBITA excluding restructuring, integration, acquisition & divestment costs Stellar order intake leading to record high backlog © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results First Half Results Net Revenues, yoy 11.1% 11.1% 11.2% 2024 H1 2025 H1 2026 H1 Backlog, yoy €3.4B €3.6B €4.0B 2024 H1 2025 H1 2026 H1 Op. EBITA Margin €1.9B 1.5% 11.2% 6.7% Order Intake, yoy €2.2B 10.3% Voluntary Turnover H1‘25: 10.9% 10.7% Employee Net Promoter Score within top 10% of our industry +45 4 1) 1) 2) 1)
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Clients: Municipal and Public Utility Clients across US Total value of various framework contracts: €100M Recent project win Secured 33 projects in Q2 including major water infrastructure wins reinforcing leading position in US water market Strong performance in Water, Energy & Climate 1) Organic Net Revenue Growth: Underlying YoY growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments. 2) Book-to-bill: order intake / net revenues First Half 2026 Performance • Robust US water market driving revenues: +15% yoy • AMP8 contracts ramping up and driving growth in UK water market • Stellar revenue performance in Germany with large grid expansion projects driving growth: >+25% yoy • Improving order intake for Environmental Restoration - key selections large energy, mining and chemical companies 5 Resilience | 38% of total Net Revenues © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results +5.2% Net Revenues organic growth YoY1) 1.12x Book-to-Bill2)
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Data centers driving good order intake First Half 2026 Performance • Momentum building with good book-to-bill • Strong revenue growth datacenters Europe, UK, US • Good growth from US Pharma clients, gradual recovery in European Pharma • Large contracts with Semis ramping up, starting to offset impact from projects winding down • Refocusing Property & Investment business in Canada away from living condos to high growth areas 6 Places | 35% of total Net Revenues Recent project win Selected as Project Management Consultant for a new major hyperscale data center project located in Europe Client: Confidential Technology Client -3.9% Net Revenues organic growth YoY1) 1.16x Book-to-Bill2) © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 1) Organic Net Revenue Growth: Underlying YoY growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments. 2) Book-to-bill: order intake / net revenues
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Significant project wins in UK, pipeline strong for Germany and North America First Half 2026 Performance • Strong performance in both Rail and Highways in North America, Germany and NL drive revenue growth • UK revenue performance impacted by winding down of the large projects, yet good order intake from various Key Clients in the quarter will support second half • Pipeline remains strong in Germany and North America 7 Mobility | 27% of total Net Revenues Recent project win Providing design and programme management services for the delivery of the HS2 rolling stock depot and Network Integrated Control Centre at Washwood Heath, Birmingham Client: High Speed 2 (HS2), UK Contract value: €90M +3.8% Net Revenues organic growth YoY1) 1.22x Book-to-Bill2) © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 1) Organic Net Revenue Growth: Underlying YoY growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments. 2) Book-to-bill: order intake / net revenues
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Raising growth guidance, reaffirming margin. Investing for growth 8© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 1. Operating EBITA is calculated as earnings before interest, tax, amortization and excludes restructuring, integration, disposal and acquisition related costs and net result from divestments Low-single digitUpgraded 11.7%-12.0% Maintained 2026 Organic net revenue growth 2026 Operating EBITA1) margin 2026 Guidance
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Financial Results and Management Actions PART 2 Simon Crowe CFO 9© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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Building momentum through consistent execution © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growth acceleration Margin expansion Right-size cost base Cash on track Growth guidance upgraded to Low Single Digit from 0%Driven by Resilience, Mobility, Places excl P&I, while investing in growth markets Guiding for margin expansion: 11.7%-12.0% Continuing reductions in overhead & low-billability headcount Progress on track: -443 people in total Tighter controls & monitoring NWC improved to 12.2% from 13.4% First half achievements Drivers Results DESIGN WIP 10
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1) Underlying growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments. • Backlog growth enhances long- term revenue visibility • Organic backlog growth of +6.7% driven by: – Resilience: German grid expansion and environmental restoration projects in Brazil – Places: Data center clients – Mobility: UK and Germany Back on track: >€1 billion quarterly orders © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 11 6.7% Organic Backlog growth YoY1) 882 963 1,109 1,098 936 887 933 974 1.03 1.04 1.06 1.09 Q3'25 Q4'25 Q1'26 Q2'26 Order Intake Net Revenues Book-to-Bill Last 12M Quarterly trend € million, % Growth acceleration Margin expansion Cash on track Right-size cost base
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• Water, Energy and Environmental markets remain the main growth engines • New leadership assignments in the UK: reinforcing trusted advisor status • Q2 order intake supported by US Water and Environmental Restoration in LATAM, providing solid visibility into H2’26 • Margin step up as a result of operating leverage 1) Underlying growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments 2) EBITA excluding restructuring, integration, acquisition and divestment costs Resilience: Strong growth and margin expansion from improved quality of portfolio 317 401 411 407 353 345 356 377 1.05 1.07 1.03 1.07 Q3'25 Q4'25 Q1'26 Q2'26 Order Intake Net Revenues Book-to-Bill Last 12M 6.9% Q2’26 Organic Net Revenue growth YoY1) 15.1% H1’26 Op. EBITA margin2) H1’25: 14.2% 9.4% Q2’26 Organic Backlog growth YoY1) Quarterly trend € million, % 12© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growth acceleration Margin expansion Cash on track Right-size cost base
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Places moving in the right direction with positive developments in Q2 in: 1. Growth: Places excl. Property & Investment (P&I) improved to 1.1% in Q2 from -3.0% in Q1 2. Margin: significantly improving in Q2 from its pressured levels in Q1 due to weaker P&I billability 3. P&I: revenues bottomed out, with a slightly better Q2 revenues vs. Q1 • Benefits of rightsizing and cost actions coming through in H2’26 1) Underlying growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments 2) EBITA excluding restructuring, integration, acquisition and divestment costs Places: Improving performance from Places excl. Property & Investment -1.7% Q2’26 Organic Net Revenue growth YoY1) 7.4% H1’26 Op. EBITA margin2) H1’25: 8.9% 7.0% Q2’26 Organic Backlog growth YoY1) Quarterly trend € million, % 13 345 366 376 387 335 299 320 339 1.08 1.09 1.13 1.14 Q3'25 Q4'25 Q1'26 Q2'26 Order Intake Net Revenues Book-to-Bill Last 12M © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growth acceleration Margin expansion Cash on track Right-size cost base
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• Moderate Q2 growth primarily due to increased bidding activity and timing effects, as well as softer UK performance • Strong execution in North America, NL and Germany • Margins improved through pricing discipline and higher utilization of Global Excellence Centers • Converting opportunities in pipeline remains key driver behind expected acceleration in H2 1) Underlying growth excl. impact of FX, acquisitions, footprint reductions, wind downs or divestments 2) EBITA excluding restructuring, integration, acquisition and divestment costs Mobility: Large projects drive order intake, margins improve 1.1% Q2’26 Organic Net Revenue growth YoY1) 10.8% H1’26 Operating EBITA margin2) H1’25: 10.2% 3.3% Q2’26 Organic Backlog growth YoY1) Highlights Quarterly trend € million, % 14 219 197 322 305 248 243 257 258 0.92 0.92 1.00 1.04 Q3'25 Q4'25 Q1'26 Q2'26 Order Intake Net Revenues Book-to-Bill Last 12M © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growth acceleration Margin expansion Cash on track Right-size cost base
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Free Cash Flow generation in line with seasonality 1) Free cash flow: cash flow from operations adjusted for capex and lease liabilities € million H1’26 H1’25 Operating EBITDA 261 269 Non-operating costs -40 -31 EBITDA 222 238 Changes in working capital -242 -214 Tax paid -62 -80 Net interest paid -32 -34 Other 14 2 Cash flow from operating activities -101 -87 Capital expenditures -12 -12 Payment of lease liabilities -35 -36 Free cash flow -149 -136 Free Cash Flow1) and Net Working Capital % € million, % -136 424 -149 13.4% 8.3% 12.2% H1 2025 H2 2025 H1 2026 FCF NWC • Free Cash Flow reflecting typical seasonal working capital movements • Healthy working capital levels, performance better vs last year driven by strong billing and cash collection • Continued focus on unbilled receivables supports confidence in stronger cash conversion through H2, in line with typical seasonal pattern 15© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growth acceleration Margin expansion Cash on track Right-size cost base
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Free Cash Flow • Dividend payout ratio 30-40% NIfO1) • Additional returns when appropriate • Leverage target range of 1.5-2.5x Net Debt / Operating EBITDA • Retain Investment Grade Rating • Investments into our business • Continue to pursue value accretive M&A • CAPEX spend light Balanced capital allocation drives growth in key markets and shareholder returns 16© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Return to shareholders Strengthening Balance Sheet Investments and M&A Acquisition of SATEL Iberia | 250 people Small strategic investment Nomic AI tool to significantly increase productivity gains in design workflows Power and data center engineering firm, enhancing Arcadis’ strong position in Energy market 1) Net income before non-recurring items (e.g., valuation changes of acquisition-related provisions, acquisition & divestment costs, expected credit loss on shareholder loans and corporate guarantees and one-off pension costs)
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Simplify the organization and operations 17 • Non-operating costs €40M (Q2: €25M): – Total restructuring: ~450 people in H1 – Business rightsizing: ~300 people – Corporate overhead: ~150 people – Costs associated with organization redesign • Other non-operating costs include integration and M&A costs Cost-out program benefit of 40-50bps for FY26 Continuing investments in growth, digital & AI 2026 Operating EBITA Margin1) levers 2025 FY Cost out program Removal of low billability headcount Improved project margins Investments 2026 FY 11.7%- 12.0% 11.1% H1 2026 right-sizing measures © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growth acceleration Margin expansion Cash on track Right-size cost base
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Focused profitable growth, lasting results Arcadis Strategy 2027-2029 18 PART 3
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Arcadis is focused on improving the quality of life to solve clients’ biggest problems 19© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Rising capital investment +66% 4 largest hyperscalers spent more than $416B in capital expenditure during 2025, up 66% yoy.1) Ageing & inadequate infrastructure 68% of US$625B EPA: two thirds of US drinking water investment need is related to replacing infrastructure: pipe replacements, upgrade treatment facilities.2) Growing demand for climate resilience $1 $9 Every US$1 invested in resilience can protect up to US$8.60 of asset value, providing a strong economic rationale for infrastructure owners.3) Growing project complexity driving cost overruns Mega projects increasingly delayed with 79% cost overruns Client increasingly face multiple layers of complexity simultaneously: stakeholder, permitting & energy requirements, labor shortages, climate adaptation.4) Expanding emphasis on asset lifecycle 20-40% cost reductions Infrastructure owners can achieve 20–40% lifecycle cost reductions by optimizing ownership across planning, design, operations, maintenance and renewal phases. 5) 1) BCG: CAPEX Trends: Analysis of 2025's Record Expenditures, 2) EPA's 7th Drinking Water Infrastructure Needs Survey, 3) World Bank Group: Low Cost, High Yield: The Adaptation and Resilience Investment Opportunity for Infrastructure, 4) McKinsey: Increasing Transparency in Megaproject Execution, 5) BCG: The Long-Term Cost of Short-Term Thinking in Infrastructure
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Our strategy: Focused profitable growth, lasting results 20© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Focus investments Invest in the most attractive spaces where we have proven track record Offer end-to-end services Leverage expertise across different stages of the asset lifecycle Reshape portfolio Review our portfolio and redeploy capital to strategic priorities Streamline how we work Bring our best people, standardize delivery approaches to scale faster (global & local) Client centricity Empower our client-facing teams to drive superior client experience Leverage scale Invest in process optimisation and automation to drive scalability and efficiency Strengthen commercial model Enhance win-rate through differentiated pricing and sector-aligned sales incentives Manage and incentivize performance Drive a perform-reward culture built on clear expectations and recognition of success Sharpen talent strategy Re-establish top talent training programs and continue to be the employer of choice Focus to grow Simplify delivery Drive performance AI & digital focus Focus on our strengths Simplify around clients Drive performance culture Principles of how we scale: Build with clients based on needs, focusing investments on our priority sectors Operating model to do it: Combine data, talent and the right operating model to power delivery at scale Plan to scale: Collect and prioritize the best ideas, finding efficiencies in how we deliver
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Transportation • Build out leading position • Continued investment with select M&A • Grow end-to-end services • Build scaled positions • Increased investment, select M&A • Grow with our global clients • Do more of what we do well • Pricing hurdles & margin discipline Core Large, structurally growing, low-cyclicality markets where we hold strong position Accelerate Fast growing sectors where we have a foothold, but not at scale Optimize More cyclical, with greater risk of commoditization Environmental services: Scaling our environmental capability as a differentiator and growth driver Industrial Manuf. & Tech Real Estate & Development Power & Water Focus on our strengths 21© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Invest in Core and Accelerate Industries to drive growth and margin
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Core Accelerate Optimize Organizing around our clients: from Global Business Areas to Industries Who we work for 22© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Rail, Transit & Ports Highways & Roads Power, Energy & Mining Water Life Sciences & Pharmaceuticals General Manufacturing Public, Institutional and Defense Property Investors & Occupiers Digital Infrastructure Transportation 27% of net revenue Industrial Manuf. & Tech 21% of net revenue Real Estate & Development 26% of net revenue Power & Water 26% of net revenue IndustriesSectors Note: All revenues pertain to 2025 values Simplify around clients
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Services 1) Covering Project and Program Management, Cost and Commercial Management, Construction Management © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Focus where we provide end-to-end integrated service offering What we do Transportation Industrial Manuf. & Tech Real Estate & DevelopmentPower & Water Integrated service offering Architecture Simplify around clients Asset Mgmt.Advisory Program Mgmt.1 Design & EngineeringEnvironment Selected service offering 23
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© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results What we want to achieve People strategy to succeed Drive performance culture Aligning talent, incentives and performance How we deliver Step-change the commercial acumen and outcome-based pricing Drive efficiencies in back-office and in core engineering services, enabled by AI Embrace entrepreneurship and growth mindset, investing in future leaders to deliver strategy Sharpen incentive structures and performance management, tying them to growth, margin and value Reset talent strategy to attract and develop the next generation of Arcadians Talent Incentives Performance 24
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We bring together the world’s brightest to solve the most complex infrastructure and environmental challenges Why Arcadis Long heritage and people with deep expertise #1 in semiconductors, pharma and hazardous waste; top-3 in data centres and power Environmental expertise built in, not bolted on From energy, power and water to transportation Built to solve the most complex challenges in an AI world Coordinating multiple stakeholders and competing demands is where we're most experienced We solve problems at every stage of an asset's life From planning decisions, through delivery, to renewal, and everything in between Our clients keep choosing us 95% of revenue from repeat clients: earned trust, not one-off wins 25© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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1) Operating EBITDA is calculated as earnings before interest, tax, depreciation and amortization and excludes restructuring, integration, disposal and acquisition related costs and net result from divestments © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 2027-2029 targets: We will step change our performance through the strategy 2027-2029 Organic Net revenue growth 2029 Operating EBITDA1 margin Mid-single digit Mid- to high-teens 26
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Focused investments Targeting above-market growth by increasing our share of wallet with our Key Clients Strategic prioritization reshapes our revenue mix towards high growth end markets Power & Water Transportation Industrial Manufacturing & Tech Real Estate & Development © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Growing Core & Accelerate from 74% to 85% by 2029 Optimize Accelerate Core Gain market share by adding new Key Clients Review of long-term potential of select businesses Disciplined and selective pursuits > > > > 2027-2029 Targets: Net Revenues 26% 15% 74% 85% 2025 2029E Net revenue split % 27
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© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 28 2026 Operating EBITA% 2026 Operating EBITDA% Focus on our strengths Simplify around clients Drive performance culture 2029 Operating EBITDA% 14.3-14.6% Mid-high teens 11.7-12.0% • Operating leverage • Driving win-rate • Investments in key growth markets • Simplified delivery reducing mgmt. layers • Overhead cost reduction through automation and AI efficiencies • Investments in AI and Global Excellence Centers • Strengthening the commercial model • Investing in talent We will drive sustainable margin improvement through our strategic pillars 2027-2029 Targets: Operating EBITDA Margin
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Wrap up PART 4 Heather Polinsky CEO 29© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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30© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results Building momentum for the next phase of growth Wrap up • Growth improving through focused execution • Margin improvement supported by cost actions ✓ Investing in future growth and digital ✓ Cash discipline reinstated Organic net revenue growth guidance increased to low single digit from flat ✓ Margin guidance maintained at 11.7%-12.0% ✓ Strategic initiatives beginning to translate into financial outcomes Strategic actions delivering results Confidence reflected in upgraded guidance 2027-2029 strategy 2027-2029 financial targets • Organic Net Revenue growth: Mid-single-digit • Operating EBITDA margin: Mid-to-high teens • Sharpening portfolio focus and simplifying the operating model • Scaling positions in high- growth markets and digital solutions • Building the best platform for our people to maximize value for clients
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Q&A PART 4 31© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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Appendix PART 5 32© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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33© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results 2025 Net Revenue Industries split From Global Business Areas to Industries 2025 Net Revenue Bridge > Global Business Areas to Industries Transportation Industrial Manuf. & Tech Real Estate & Development Power & Water Resilience Places Mobility Grand Total 6% 64% 14% 16% 6% 4% 45% 45% 86% 3% 0% 10% 27% 26% 21% 26% 100% 100% 100% 100% Appendix
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Global Business Areas financial performance 34 Appendix H1 2026 Resilience Places Mobility in € millions 2026 2025 change 2026 2025 change 2026 2025 change Net revenues 733 727 1% 659 707 -7% 515 503 2% Share in total net revenues 38% 38% 35% 36% 27% 26% Organic growth (%)1) 5.2% 2.7% -3.9% -3.2% 3.8% 0.3% Operating EBITA2) 111 103 8% 49 63 -22% 56 51 9% Operating EBITA margin (%) 15.1% 14.2% 7.4% 8.9% 10.8% 10.2% Order intake 818 803 2% 763 749 2% 626 503 25% Backlog net revenues 1,168 1,042 12% 1,722 1,624 6% 1,061 981 8% Backlog organic growth (%, yoy)1) 9.4% 6.9% 7.0% 5.4% 3.3% 31.7% Backlog organic growth (%, ytd)1) 7.8% 6.8% 3.1% 1.9% 12.0% -0.6% 2Q 2026 Resilience Places Mobility in € millions 2026 2025 change 2026 2025 change 2026 2025 change Net revenues 377 358 5% 339 352 -4% 258 254 1% Share in total net revenues 39% 37% 35% 37% 26% 26% Organic growth (%)1) 6.9% 1.5% -1.7% -3.5% 1.1% 2.2% Order intake 407 327 24% 387 384 1% 305 264 15% © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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Quarterly trend for Free Cash Flow, Net Debt and Net Working Capital % 208 -97 8 134 183 -138 2 80 344 0 873 963 1,016 886 739 920 1,039 978 797 974 1,042 9.3% 11.6% 12.7% 12.7% 10.8% 12.9% 13.4% 14.0% 8.3% 12.1% 12.2% Q4 2023 Q1 2024 Q2 2024 Q3 2024 Q4 2024 Q1 2025 Q2 2025 Q3 2025 Q4 2025 Q1 2026 Q2 2026 Free Cash FlowNWC% Net Debt 35 Appendix © Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results
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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 forward- looking 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. Disclaimer 36© Arcadis 2026 | Arcadis Q2 and Half Year 2026 Results