Slide 1: 2025 Half-Year Results & Vision for the New Osmosun / Watera Entity
2025 HALF-YEAR RESULTS INVESTOR PRESENTATION – 30 SEPTEMBER 2025 & VISION FOR THE NEW OSMOSUN / WATERA ENTITY
Slide 2: 2025 HY Results and Transaction
2025 HY RESULTS AND TRANSACTION Maxime Haudebourg 2
Slide 3: Situation
OSMOSUN has faced challenges in scaling its operations & unlocking the full potential of its know-how SITUATION These difficulties have led to weak H1 results & financial stress (with cash visibility until July 2025) The investment by Unibios in July 2025 and the joining with Watera marks the beginn
Slide 4: P&L Statement
P&L STATEMENT €000 –French GAAP H1 2024 H1 2025 Limited review Revenues 1,505 616 Low order intake in H1 2025 Revenue mainly driven by projects signed in 2022 and 2023 Total production 1,540 741 Gross margin* (563) 381 Margin recovery driven by lower subcontracting % of total production - 51,3% Oper
Slide 5: Balance Sheet pre-capital increase
BALANCE SHEET Balance sheet pre-capital increase €000 –French GAAP Limited review ASSETS 12/24 06/25 12/24 06/25 EQUITY & LIABILITIES Fixed assets 1,128 1,023 1,214 (294) Shareholders’ equity Stable except increase in work in progress 1 related to projects delivered in July 2025 o/w property, plant
Slide 6: Transaction
In July 2025, Unibios, an investment company listed on the ASE, acquired a 65% stake in OSMOSUN through a dual operation OSMOSUN capital increase of €2M in cash TRANSACTION • €1.6M from Unibios • €0.4M from OSMOSUN long-standing shareholders OSMOSUN capital increase in kind • 30% stake in Watera* (f
Slide 7: Foundation of the New Entity
FOUNDATION OF THE NEW ENTITY Orfeas Mavrikios 7
Slide 8: Framework
Watera, a leading water & wastewater treatment & reuse Group with headquarters in Luxembourg, originally established in Greece in 1963 with also FRAMEWORK direct presence in Czech Republic, Bulgaria & Italy, combines its long-standing expertise & proven profitable business model with OSMOSUN’s know-
Slide 9: Unibios & Watera Background
▪ Unibios, the holding company of Watera Group, was established in 2008 through the transformation of a traditional HVAC manufacturing company, listed on the ASE since 1972 (> 9,000 shareholders), into an Investment Holding Company UNIBIOS & WATERA ▪ 2025: Unibios takes control of Osmosun & initiate
Slide 10: Watera's Indicative References
Greece, INDICATIVE REFERENCES Municipality SWRO plant 4,500m3/d Czech, Mineral Water Company Condensate RP 240m3/d WATERA’S UK, P.P., Softeners, RO, EDI, MB WTP 240m3/d Bulgaria, Power Plan RO & EDI WTP 9,000m3/d 10 10
Slide 11: Osmosun's Indicative References
Djibouti, INDICATIVE REFERENCES Desalination solar plant, SW, 56m3/d Senegal, Desalination solar OSMOSUN’S plant, BW, 45m3/d France, Desalination solar, SW, 15m3/d Cape Verde, Desalination solar plant, SW, 1,000m3/d 11 11
Slide 12: Business Model
Results (EBITDA > 15%) BUSINESS MODEL Customer Satisfaction After Sales Services, Standard Equipment BOO, Operating & WATERA Rental Contracts Long Term BOT, Consumables Spares and Projects Focused Applied Process, Technology & Product R&D Know-how Competitive Manufacturing PEOPLE 12 12
Slide 13: Unibios & Watera Track Record
Unibios’ revenue (€000) & EBITDA margin 14,7 UNIBIOS & WATERA TRACK RECORD 24,0% 13,0 of which Watera 22,0% 11,2 €14.4M revenue COVID negative 20,0% & impact 8,5 18,5% 21.1% EBITDA margin 7,3 18,0% 16,1% 16,2% 15,2% 16,0% 14,0% FTE Unibios: 87 12,0% 11,1% 0,0 10,0% 2020 2021 2022 2023 2024 13 13
Slide 14: Financials H1 2025
P&L STATEMENT FINANCIALS H1 2025 €000 – IFRS H1 2024 H1 2025 Limited review UNIBIOS GROUP Revenues 5.807 6.395 Cost of Sales (3.481) (3.820) Gross margin* 2.326 2.575 % of Cost of Sales 40,1% 40,3% Operating Profits 722 982 Extraordinary profit / (loss) 519 1.070 Financing Costs (131) (167) Net Inco
Slide 15: Combined Strengths of Osmosun & Watera
COMBINED STRENGTHS OF OSMOSUN Both active in water treatment market, & Watera particularly reverse osmosis OSMOSUN & WATERA Very innovative systems combining renewable OSMOSUN energy sources and reverse osmosis brings Listing on Paris Euronext Growth market Watera Long standing track record (>5,000
Slide 16: Osmosun / Watera Value Proposition
OSMOSUN / WATERA VALUE PROPOSITION Julien Cauvy 16
Slide 17: Water Solutions Globally
WATER SOLUTIONS LEVERAGE OUR EXPERTISE DIVERSIFIED PORTFOLIO WITH GLOBAL REACH GLOBALLY PROVIDE Water Treatment Plant Projects Reverse osmosis Customized engineering Filtration and ultra-filtration Commercial & Industrial W. T. Systems Standard equipment Water recycling and reuse Light Commercial W.
Slide 18: Leverage Our Proven Track Record
LEVERAGE OUR PROVEN More than 5,000 WT & WTT SYSTEMS installed TOP 5 European Manufacturers In Reverse Osmosis Desalination TRACK RECORD in the Served Segment The total installed capacity of Reverse Osmosis Desalination plants exceeds 350.000 m3/day The total installed capacity of Rapid Filtration p
Slide 19: Leverage Competitive Manufacturing
COST COMPETITIVE LEVERAGE COMPETITIVE MANUFACTURING CAPABILITIES IN GREECE MANUFACTURING Manufacturing facility of 3,300 m2 at the Liosia Industrial Park on the Athens Ring Road + New modern productive manufacturing facility of 4,500 m2 in Volos Industrial Park (3h drive from Athens) by Dec. 2025* *
Slide 20: Leverage a Well-Balanced Mix
EQUIPMENT SALES RECURRING REVENUE WELL-BALANCED MIX After Sales Services LEVERAGE A Projects Supply of Consumables Rentals Standard Operation of equipment Water Treatment Plants under long-term contracts 20 20
Slide 21: Extend a Sustainable Business Model
Market EXTEND A SUSTAINABLE knowledge Understanding BUSINESS MODEL Project Standardized execution equipment excellence Efficiency Strong engineering team Bring OSMOSUN to Watera’s performance Recurring thanks to...… Competitive production revenue Visibility cost +15% profitability 21 21
Slide 22: Cost Restructuring
COST REDUCTION PLAN OF €1.2M – FULL-YEAR Cost savings COST RESTRUCTURING IMPACT OF OSMOSUN General expenses Salaries - €0.5M €1.6M - €0.4M - €1.2M - 31% - €0.1M €1,4M - 14% €2.3M €1,3M - 43% 2024 Cost reduction Cost reduction Total reduction Projected annual S1 2025 S2 2025 effected 2025 costs Staff
Slide 23: New Organisation & New Vision
NEW ORGANISATION & NEW VISION Orfeas Mavrikios 23
Slide 24: Growth Strategy
Aim to drive sustainable stakeholder value by: GROWTH STRATEGY Focusing the company on the highly attractive and broad Water Treatment and Water Reuse markets Expanding our European and Global footprint Combining profitable organic growth & acquisitions 24
Slide 25: Development: Step 1 – Establishment of Watera France
ESTABLISHMENT OF WATERA FRANCE DEVELOPMENT: STEP 1 ▪ Spin-off OSMOSUN’s industrial and commercial activities to create Watera France ▪ Watera France to focus on business development: • Market the full range of Watera’s Water Treatment & Water reuse systems & solutions in France & French- Speaking Co
Slide 26: Development: Step 2 – Osmosun Rebranded to Watera
OSMOSUN REBRANDED TO WATERA DEVELOPMENT: STEP 2 ▪ Change of name signals a new beginning, implementing a successful business model in the highly attractive market for water treatment and reuse ▪ Watera (Euronext) will become a holding company, focused on water & wastewater treatment & reuse solution
Slide 27: Development: Step 3 – Growth Through Acquisitions
GROWTH THROUGH ACQUISITIONS DEVELOPMENT: STEP 3 To build a leading global pure player in the water treatment and water reuse markets, we plan to combine organic growth with strategic acquisitions to: ▪ Develop complementary activities ▪ Expand our European footprint ▪ Exploit synergies of scale and
Slide 28: Structure
Unibios Holdings Free float 65% 35% ** STRUCTURE* NEW 70% 30% 100% Watera International Watera France New acquisitions 100% Watera Hellas Watera Bulgaria Watera Italy Watera Czech * To be implemented by the end of the year 2025 // ** Formerly named Osmosun 28 28
Slide 29: Governance
Board of directors Board of directors up to 29/09/2025 Changes as of 30/09/2025 GOVERNANCE CHANGE IN Maxime Haudebourg Orfeas Mavrikios becomes Chairman and CEO Chairman and CEO Julien Cauvy Maxime Haudebourg becomes Deputy CEO* Director OKwind Group Director represented Post new structure implement
Slide 30: Conclusion
1. Significant growth potential in the broad and dynamic water & wastewater treatment & reuse markets CONCLUSION 2. One of the 2 pure-play water treatment companies listed on Euronext 3. Long-standing expertise and deep market knowledge 4. Consistently profitable business model 5. Financial resource
Slide 31: Q&A session
INVESTOR PRESENTATION – 30 SEPTEMBER 2025 Q&A session