Slide 1: The World Is Our Project – IR Deck Q4 2025
THE WORLD IS OUR PROJECT IR DECK – Q4 2025 Carl Vanden Bussche, IR
Slide 2: Agenda
AGENDA 1 3 Introduction to DEME & its activities Financial & non financials 2 4 Segments update Q&A 2
Slide 3: DEME: A Global Marine Solution Provider
DEME A GLOBAL MARINE SOLUTION PROVIDER 150 years leadership in marine contracting works Solid financial performance Maintaining a robust balance sheet 5,800+ Highly skilled professionals Growth trajectory driven by secular underlying trends 100+ Specialized vessels Market leading in healthy segments
Slide 4: Creating Solutions for Global Challenges
CREATING SOLUTIONS FOR GLOBAL CHALLENGES THE WORLD IS OUR PROJECT Growing population & Increasing maritime trade Global Climate Change Environmental Challenges increasing urbanization 4
Slide 5: Leading in 4 Different Segments
LEADING IN 4 DIFFERENT SEGMENTS OFFSHORE ENERGY DREDGING & INFRA ENVIRONMENTAL CONCESSIONS Unrivalled track record in 145+ years of experience in dredging, land Innovative solutions for soil remediation, Developing, building and operating construction offshore wind farms and reclamation and marine i
Slide 6: Segments Update
2 SEGMENTS UPDATE SDEME
Slide 7: OFFSHORE ENERGY
—_ — — , _ . — % — 4 DEME
Slide 8: Offshore Energy Key Figures
OFFSHORE ENERGY KEY FIGURES 2000 20+ dedicated ~85% of start offshore wind offshore energy Turnover activities vessels RENEWABLES Offshore wind farms • 350+ successfully executed projects 15+ k MW Innovation focused with many industry • Many world-firsts, including Offshore capacity of installed Fou
Slide 9: Broad Service Offering
BROAD SERVICE OFFERING PROVIDING FLEXIBLE SOLUTIONS FOR THE MOST DEMANDING OFFSHORE WIND PROJECTS FOUNDATIONS CABLES TURBINES ROCK PLACEMENT Global market leader (technology, Leading market player 20+ years of expertise as market Commanding 1/3rd of the global trackrecord, market share) leader rock
Slide 10: One of the Most Technologically Advanced Fleet
ONE OF THE MOST TECHNOLOGICALLY ADVANCED FLEET DRIVEN BY CONTINUOUS INVESTMENTS FOUNDATIONS CABLES ROCK PLACEMENT ORION GREEN JADE VIKING NEPTUN YELLOWSTONE • DP3 floating installation vessel • DP3 floating installation vessel • DP3 cable laying vessel • Fallpipe vessel • 5,000-ton lifting capacity
Slide 11: Offshore Energy Performance Dashboard 2024
OFFSHORE ENERGY Order book reached a record high driven by strong demand, recent expansion of fleet capacity, add- EBITDA grew 87% driven by strong tu growth and disciplined and effective execution ons to existing projects and PERFORMANCE DASHBOARD 2024 addition of new contracts in the APAC region a
Slide 12: Offshore Energy Key Projects in 2025
OFFSHORE ENERGY DOGGER BANK A, B and C (3.6 GW) Inter-array cables & rock dumping KEY PROJECTS IN 2025 D NEARTH NA GAOITHE (0.45 GW) Inter-array and interconnector cables BALTIC POWER (1.2 GW) DIEPPE – LE TRÉPORT (0.5 MW) C Pin piles, jackets for 62 turbines; offshore substation and inter-array cabl
Slide 13: Ile d'Yeu and Noirmoutier
Gn LELILLELLL. MOUTIER *YEU AND NOIR ILED
Slide 14: Ile d'Yeu et Noirmoutier
ILE D’YEU ET NOIRMOUTIER MAJOR FRENCH OFFSHORE PROJECT FRANCE, LOIR ATLANTIQUE PROJECT CHARACTERISTICS Customer: EMYN (Ocean Winds, Requires same innovative drilling Sumitomo corp and La Banque des technology (MODIGA) as applied in Territoires and Vendée Energie) Saint Nazaire, further improved and
Slide 15: US Projects
US PROJECTS
Slide 16: Status in the US
STATUS IN THE US EXECUTION KICKED OFF AS OF 2023 OVERVIEW EAST COAST DEME NOW INVOLVED IN THE WE DELIVER: PROJECTS FOLLOWING PROJECTS South Fork: cable works; Done in 2023 Vineyard Wind 1 (800MW): Monopiles, TP’s, substation & turbines; ongoing, kicked off in 2023; partial grid connection, advancing
Slide 17: Taiwan
TAIWAN
Slide 18: Building Track Record in Taiwan
BUILDING TRACKRECORD IN TAIWAN BUILDING ON OUR PRESENCE IN TAIWAN BUILDING TRACK RECORD OFFSHORE WIND MARKET Partnership approach between DEME and CSBC, (CDWE), leveraging its main installation vessel, ‘Green Jade’ • Executing dredging and reclamation projects since 1995 • Strongest track record amo
Slide 19: Dredging & Infra
DREDGING & INFRA
Slide 20: Global Dredging Powerhouse
GLOBAL DREDGING POWERHOUSE COMPLEMENTED BY INFRA ACTIVITIES IN CORE MARKETS DREDGING INFRA ACTIVITIES: ACTIVITIES: Capital and 2 bn euros Inland waterway maintenance Land reclamation Turnover (2024) infrastructure Port construction dredging Marine aggregates 358 m euros Bored and immersed Other mari
Slide 21: One of the Most Technologically Advanced Fleet
ONE OF THE MOST TECHNOLOGICALLY ADVANCED FLEET DRIVEN BY CONTINUOUS INVESTMENTS CUTTER DREDGER HOPPER DREDGER SPARTACUS BONNY RIVER • World’s largest CSD • Dredges hard soils and in deep waters • Dual fuel (>100m) • Size: 44,580 kW total installed power • Size: 15,016 m3 • Delivered 2021 • Delivered
Slide 22: Dredging & Infra Performance Dashboard FY24
DREDGING & INFRA order book grew 3% y-o-y with a healthy intake of new projects EBITDA grew 20% driven by sustained high activity levels and across various regions PERFORMANCE DASHBOARD FY24 disciplined project execution Turnover grew 22% y-o-y, approaching two billion euro, driven by strong perform
Slide 23: Dredging & Infra Key Projects in 2025
ARDERSIER ENERGY TRANSITION FACILITY A Deepening and widening of the harbor and access channel DREDGING & INFRA B PORT-LA NOUVELLE Port expansion via dredging and construction of terminals KEY PROJECTS IN 2025 OOSTERWEEL C Completion of tunnel elements for the Scheldt Tunnel PRINCESS ELISABETH ISLAN
Slide 24: Oosterweel
OOSTERWEEL
Slide 25: The Oosterweel Connection
THE OOSTERWEEL CONNECTION ‘SCHELDT TUNNEL & CONSTRUCTION DOCK’ • Two cut and cover (C&C) tunnels on the embankments of the river Scheldt in Antwerp • Awarded to TM COTU, a JV with DEME, BESIX, Jan De Nul ; Stadsbader • 1.8 km long • 8 tunnel elements constructed in Zeebrugge • Dimensions tunnel elem
Slide 26: Scheldt Tunnel & Construction Dock
‘SCHELDT TUNNEL & CONSTRUCTION DOCK’ CONSTRUCTION SITES Construction Dock Zeebrugge Scheldt Tunnel Antwerp 26
Slide 27: Princess Elisabeth Island
PRINCESS ELISABETH ISLAND
Slide 28: Princess Elisabeth Island
PRINCESS ELISABETH ISLAND INDUSTRY-FIRST, ARTIFICIAL ENERGY ISLAND PROJECT CHARACTERISTICS Customer: ELIA A 600m+ euros project (excluding high voltage infrastructure) Contractor: TM EDISON (DEME & JDN) First building block of an integrated European offshore EPCI contract including further electrici
Slide 29: Environmental
ENVIRONMENTAL
Slide 30: Leading Environmental Specialist in Benelux
LEADING ENVIRONMENTAL SPECIALIST IN BENELUX OFFERING WIDE RANGE OF SERVICES SOIL REMEDIATION & ENVIRONMENTAL DREDGING & BROWNFIELD DEVELOPMENT SEDIMENT TREATMENT HIGH WATER PROTECTION • Cleaning and recycling of polluted • Fluvial dredging with minimal • Offering tailored solutions for high soils en
Slide 31: Environmental Performance Dashboard FY24
ENVIRONMENTAL order book remains stable with additional projects in the Benelux; exploring EBITDA margin of 13% (2023 margin included a non-recurring opportunities in Italy and the UK PERFORMANCE DASHBOARD FY24 settlement) Turnover grew 11% to 337 million euro fueled Launching ‘Cargen’, an innovativ
Slide 32: Environmental Key Projects in 2025
ENVIRONMENTAL KEY PROJECTS IN 2025 A BERGEN Remediation of the Slettebakken landfill contracted by the City of Bergen; >200,000 tons of landfill waste A GORINCHEM-WAARDENBURG (GOWA) 23 km dike reinforcement project, part of the National Flood Protection Program B MARKEN A multi-year dike reinforceme
Slide 33: Concessions
CONCESSIONS
Slide 34: Infrastructure Developer, Investor and Manager
INFRASTRUCTURE DEVELOPER, INVESTOR AND MANAGER LEVERAGING UNIQUE COMBINATION OF TECHNICAL AND FINANCIAL CAPABILITIES AT A GLANCE ACTIVE IN 4 SECTORS Early involvement in the development process Strong additionality with contracting side of DEME Strengthens and diversified DEME’s financial position O
Slide 35: Concessions
CONCESSIONS LEVERAGING UNIQUE COMBINATION OF TECHNICAL AND FINANCIAL CAPABILITIES OFFSHORE WIND DREDGING & INFRA GREEN HYDROGEN DEEP-SEA HARVESTING • Stakes in Offshore wind • Involved in marine • Advancing hydrogen • Global sea mineral with total installed capacity infrastructure projects developme
Slide 36: Financials & Non Financials
3 FINANCIALS & NON FINANCIALS 36
Slide 37: Key Financial Highlights FY24
FY24 KEY FINANCIAL HIGHLIGHTS Order book at unmatched level of 8.2 billion euros, +8% vs (in millions of euro) 2024 2023 2022 2023 order book 8,200 7,582 6,190 y-o-y growth +8% +22% +5% Turnover +25%, surpassing the 4 billion euros mark, Turnover 4,101 3,285 2,655 all segments contributing to the gr
Slide 38: Key Financial Highlights 1H25
1H25 KEY FINANCIAL HIGHLIGHTS Order book remains at healthy level of 7.5 billion euros (in millions of euros) 1H25 1H24 1H23 Turnover +10%, surpassing the 2 billion euros mark, Order book 7,521 7,622 7,654 fueled by solid growth for Offshore Energy y-o-y growth -1% -0% +36% Turnover 2,117 1,916 1,47
Slide 39: 1H25 – Group Order Book
1H25 – GROUP ORDER BOOK 1 ORDER BOOK REMAINS SOLID Order book Geographical breakdown Order book run-off 7,654 7,622 7,521 3% 1,558 8% 10% 1,536 5,620 6% 4,737 11% 1H25 3% 2,486 16% 1H24 1,940 76% 62% 5% Europe Africa The Americas Asia 2 2H25 FY26 FY27 >2027 1H21 1H22 1H23 1H24 1H25 Middle East (in m
Slide 40: 1H25 – Group Turnover
1H25 – GROUP TURNOVER SEGMENT BREAKDOWN - GROUP TURNOVER GREW 10% WITH STRONG GROWTH IN OFFSHORE ENERGY Turnover Geographical breakdown 2,117 2,117 1,916 1,916 2% 1,475 15% 1,475 1,292 11% 6% 1,292 1,063 1,063 22% 9% 1H24 1H25 53% 8% 66% 8% Europe Africa 1H21 1H22 1H23 1H24 1H25 The Americas Asia Mi
Slide 41: CapEx
CAPEX CONTINUED INVESTMENTS IN STRENGTHENING THE FLEET PAY OFF EVOLUTION OF CAPEX1 484 441 435 399 282 286 202 2018 2019 2020 2021 2022 2023 2024 (in millions of euro) CAPEX HIGHLIGHTS 2024 2,468 million euros Increased capacity of ‘Viking Neptun’ with Major conversion of ‘Yelllowstone’, a NET BOOK
Slide 42: FY24 – Segments
FY24 – SEGMENTS COMPLEMENTARY SEGMENTS RESULT IN DIVERSIFIED SOURCES OF INCOME OFFSHORE ENERGY DREDGING & INFRA ENVIRONMENTAL CONCESSIONS (in millions of euro) 2024 2023 2024 2023 2024 2023 (in millions of euro) Since start Turnover1 2,055 1,502 1,963 1,605 337 304 Value of projects at ca. 7,200 Y-o
Slide 43: 1H25 – Segments
1H25 – SEGMENTS COMPLEMENTARY SEGMENTS CONTRIBUTE TO A BALANCED AND DIVERSIFIED REVENUE STREAM OFFSHORE ENERGY DREDGING & INFRA ENVIRONMENTAL CONCESSIONS (in millions of euros) 1H25 1H24 1H25 1H24 1H25 1H24 (in millions of euros) Since start Turnover1 1,141 948 142 Value of projects at 898 992 175 c
Slide 44: 3Q25 9 Month Turnover Surpassed 3 Billion Euros
3Q25 9 month turnover surpassed 3 billion euros, a 3% increase y-o-y ANOTHER RECORD YEAR TAKING SHAPE Outlook: full year turnover to be at least in line with 2024 with EBITDA margin in the YTD25 YTD24 YTD23 range of 20 to 22% (in millions of euro) 1H25 (3Q25) (3Q24) (3Q23) Orderbook 7,505 7,521 7,14
Slide 45: ESG
ESG UPDATE ON PROFESS ENVIRONMENTAL (in %) 2024 2023 2022 42% of turnover is EU taxonomy aligned, up from 33%, driven by strong growth in 2024 offshore wind projects and inclusion of DEME’s environmental EU Taxonomy - Turnover activities, such as remediation of contaminated sites and treatment cente
Slide 46: Dividend
DIVIDEND AN 81% INCREASE IN GROSS DIVIDEND In line with DEME’s dividend policy, targeted to a pay-out ratio of 33% of the group’s net profit, the Board of Directors will propose to the General Assembly a gross dividend of 3.8 euros per share, marking an 81% increase compared to last year. Subject to
Slide 47: Acquiring Havfram
ACQUIRING HAVFRAM STRATEGIC ACQUISITION, ENHANCING DEME’S COMPETITIVE POSITION Havfram, a Norwegian offshore wind infrastructure company, building two next-gen offshore wind installation vessels. • Vessels equipped to install the next generation of turbines and foundations ; to be delivered in 4Q25
Slide 48: & DEME
& DEME SeSEEELiLL} ||)
Slide 49: Financial Calendar
FINANCIAL CALENDAR Full-year results 2025 February 26, 2026 Trading update Q1 2026 May 13, 2026 Annual General Meeting May 20, 2026 Half-year results 2026 August 26, 2026 Trading update Q3 2026 November 17, 2026 49
Slide 50: Thank You
THANK YOU For more information vanden.bussche.carl@deme-group.com
Slide 51: Appendix
APPENDIX
Slide 52: 52
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Slide 53: Offshore Energy Performance Dashboard 1H25
OFFSHORE ENERGY Order book reached 4.1 billion euros, up from 4.0 billion euros, including the addition of Havfram order book, add-ons to existing projects and EBITDA grew 118% driven by strong turnover growth and disciplined and effective execution addition of smaller new contracts PERFORMANCE DASH
Slide 54: Dredging & Infra Performance Dashboard 1H25
DREDGING & INFRA Order book -7% compared to last year; remains healthy at over 3 billion euros and with EBITDA margin declined to 12% largely due to adverse results on a marine PERFORMANCE DASHBOARD 1H25 continued strong tender activity infrastructure project Turnover relatively stable compared to a
Slide 55: Environmental Performance Dashboard 1H25
ENVIRONMENTAL Order book remains stable with projects in the Benelux; exploring opportunities in Italy EBITDA margin of 15%, up from 13% a year ago and the UK PERFORMANCE DASHBOARD 1H25 Turnover of 142 million euros with work on long- Expanding treatment capacity in Belgium and the term and complex
Slide 56: Disclaimer
DISCLAIMER The Information and any opinions contained therein are provided as at the date of the presentation and are subject to change without notice. In giving this presentation, DEME does not undertake any obligation to provide the recipient with access to any additional information or to update