AOF Investor presentation

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© ATOSS Software SE 20262 © ATOSS Software SE 2026 This presentation contains forward-looking statements based on the beliefs of ATOSS Software SE. Such statements reflect current views of ATOSS Software SE with respect to future events and results and are subject to risks and uncertainties. Actual results may vary materially from those projected here, due to factors including changes in general economic and business conditions, the introduction of competing products, lack of market acceptance of new products, services or technologies and changes in business strategy. ATOSS Software SE does not intend or assume any obligation to update these forward-looking statements. ATOSS Software SE 2026 Disclaimer

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© ATOSS Software SE 20263 ATOSS – Leading in the field of Workforce Management Strong position in growing WFM market fueling Ambition 2030 Ambition 1. As of 12/31/2025 ; 2. Cloud w/o Crewmeister; 3. ARR churn in Cloud w/o Crewmeister We are a leading Workforce Management provider with solutions for international Enterprise, SMB, and small-business customers, fueled by strong historic growth and performance metrics to drive our future growth strategy Key factors supporting growth ambition1Total revenue in EURm 114 151 171 189 2022 2023 2024 2025 2026 guidance 2027 proj. 2030 ambition ~215 ~245 ~400 18.5% ~ 1,200 Enterprise customers ~ 2,000 SMB customers ~ 17,900 small business customers ~ 18,800 Cloud customers >4m employees integrated in ATOSS solutions 113.2% Net retention rate2 96.0% Gross retention rate3 % % 850+ employees 36% EBIT margin Double-digit revenue growth (yoy since FY14) % 27% 34% 37% 36%EBIT% >35%≥32% ≥33% Rule of 44% Rule of 67% Rule of 50% Rule of 42% Rule of 45% Rule of 47% ~14% Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 20265 Workforce Management landscape continues to grow and evolve 6.9 7.5 8.2 9.0 9.8 10.7 11.7 12.8 2023 2024 2025 2026 2027 2028 2029 2030 9% 1. ATOSS estimates and third-party data as of March 2025; 2. ILOSTAT; 30% 36% 23% 6% 6% Europe North America Asia Pacific MEA LATAM 11% 10% 9% 8% 6% Market size by geo (2023)1 CAGR by geo (2023-2030)1WFM market size development ($bn)1 75% 50% 25% Global collective bargaining coverage rate2 AI driven digitalization of HR: AI-driven WFM solutions enhance efficiency, productivity and simplicity for both employees and managers, leading to significant business value. Compliance Digital Natives Demographic change Volatility Global trends in the WFM market WFM trends insights on next slide

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© ATOSS Software SE 20266 Workforce Management market drivers How ATOSS‘ solution portfolio addresses key market trends Market forces and trends for Workforce Management: Compliance Organizations increasingly rely on technology and analytics to ensure legal and ethical Workforce Management amid increasing regulatory demands With an aging workforce and skill shortages, companies must invest in upskilling, employee development and flexible work models to stay competitive Generations Z and Alpha, raised with advanced technology, will expect intuitive, AI-driven, and seamless digital experiences in the workplace To navigate rising uncertainty and shifting demand, companies need flexible production systems, data-driven forecasting, and adaptable workforce strategies Demographic change Digital Natives Volatility Our comprehensive Workforce Management solution portfolio comprising ASE/S, ATC and Crewmeister, holistically addresses these market forces and trends, enabling businesses of all sizes to stay agile, digital, and competitive Well-being Scheduling & forecast accuracy Data accuracy Policies & procedures Laws & regulations Collaboration Flexible work arrangements Scheduling & forecast accuracy Flexible work arrangements Workforce intelligence Workforce intelligence Flexibility

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© ATOSS Software SE 20267 ATOSS’ product portfolio supports customers‘ shifting needs Full-range solutions span varying areas of need and complexity, resulting in strong ROI for customers ATOSS helps companies to have ... …the right employee …with the right qualification …at the right place …at the right time …at the right cost …at full compliance …with optimal employee experience Goal Demand and cost-optimized synchronization of working time and order volume Current situation Fluctuation in demand Little flexibility and long response times Staff hours Time Time Non-demand-optimized Demand-optimized Surplus/shortfall OPTIMIZATION POTENTIAL Personnel availability AFTER OPTIMIZATIONStaff hours up to 70% Reduced personnel costs in HR up to 80% Reduced planning effort up to 90% Savings in overtime up to 50% Increased efficiency up to 10,000 h/p.a. Freeing up capacities through self-services up to 75% Time savings through automatic reports Exemplary: Effects generated from ATOSS projects – Cross-industry (figures per year)1 1. Figures based on specific client case studies

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© ATOSS Software SE 20268 Workforce Management by ATOSS in a nutshell Efficiency via highly flexible staff deployment Full-range provider Retail Manufacturing Logistics Healthcare Services >10k >1k >500 >30 1-30 Complexity of requirements Industry focus: ATOSS Staff Efficiency Suite ATOSS Time Control Crewmeister # of employees 1. Included in ATOSS product vision HCM vendor agnostic Time Evaluation Engine (TEE) Time Management Personnel Deployment Planning Qualification Management Absence Management Self Services Forecasting Analytics Adjacent services1 AI-based services

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© ATOSS Software SE 20269 Product update Current AI services portfolio and roadmap Agentic use Chat-based AI assistant to speed up and automates routine planning tasks. Q2 2026 AI supported forecasting AI based absence rate forecasting for illness & vacation Q4 2026 Business intelligence AI based business analytics to improve planning process Q3 2026 Demand driver forecasting Multivariate models project workload and staffing from key demand drivers Q2 2025 Absence rate forecasting AI based absence rate forecasting for illness & vacation Q3 2025 Workforce intelligence Data-driven and AI supported insights on fluctuation, overtime and absences Q4 2025 AI-based crew administrator Introduction of set-up guides, proactive AI, signals/alerts and recommendations Q3 2026 1. Expert Agent V1 (Information Retrieval and Task Execution) 2. Staff Center Agent (Self-Service use-cases) Q4 2026 1. Expert Agent V3 2. Master Data Mgmt. Agent V2 3. Configuration Agent V2 (Configuration beyond Workforce Policy) 4. Workforce Skill Intelligence Agent 5. Data Quality Agent 6. TeamFlow Agent 7. Schedule Scenario Agent (Simulate different schedule scenarios to test the impact of a variety of decisions) 2028 Advanced AI capabilities General AI Assistant integration, smart clock-in reminders and smart scheduling suggestions 2027 2025 2026 2027/28 Further roll-out of agents, forecast & BI Integrate agent into conversation flow, expand agent to expert use cases, Add ad-hoc data visualisations, etc. 2027 AI is one of our core investment areas in the years ahead, supporting our 2030 ambition by unlocking new revenue streams, capturing synergies, expanding our total addressable market, and thus accelerating organic growth. 1. Expert Agent V2 (Retail) 2. Master Data Mgmt. Agent V1 3. Wellbeing Insight Agent 4. Workforce Anomaly Agent 5. Configuration Agent V1 (Focus on Workforce Policy) 2027

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© ATOSS Software SE 2026 11 ATOSS – 20th record year achieved Running like clockwork Strong growth track record, excellent traction in Cloud transition and expansion outside the DACH region Total revenue in EURm Software revenue in EURm EBIT in EURm 13%2 25%224%2 37%2 52% NON-DACH revenue in EURm 24 27 29 29 32 33 36 40 45 50 55 63 71 86 97 114 151 171 189 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 +11% +6%1 +15%1 Datenquellen: (1) Total Revenue “Umsatz_EBIT” -> Tab: Investor Relations Automatisches Aktualisieren nicht eingestellt Total Revenue 2023: gm. Q3- Pressemitteilung 4 5 6 7 7 8 8 10 11 14 14 17 19 26 27 31 52 63 68 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 +7% 17.2 19.6 48.8 (74%) 2021 12.6 65.8 (84%) 2022 2025 131.9 (94%) 8.8 2024 111.3 (89%) 13.5 2023 88.6 (82%) 66.0 78.4 108.2 124.9 140.7 +19% +38% +15% +13% Non Recurring Revenue Recurring Revenue 40% 2021 52% 2022 55% 2023 57% 2024 63% 2025 4.0 5.6 8.4 9.8 11.630%1 Non Recurring Recurring 36%2 1. Average growth rate; 2. EBIT as % of total revenue Note: All 2025 figures are preliminary and unaudited Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202612 Cloud & Subscriptions MRR & ARR Total development FY 2025 Share of Cloud & Subscriptions in revenue in % 5% 70% 21% 5% Licences Recurring Revenue CSS HW & Others (Cloud & Subscriptions (49%); Maintenance (21%)) 41% Q1-Q4 2021 52% Q1-Q4 2022 60% Q1-Q4 2023 65% Q1-Q4 2024 70% Q1-Q4 2025 100% Achtung: Zahlen in () auch mit TT verknüpft Increasing share of Cloud & Subscriptions in recurring revenue Maintenance Cloud & Subscriptions Note: All 2025 figures are preliminary and unaudited 10.1 11.8 13.0 13.6 14.5 16.4 17.5 18.7 19.7 21.4 22.8 23.4 25.1 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 +28% Datenquelle: (1) ARR Reporting konsolidiert Achtung: ARR inkl. ASP + Aloud Cloud & Subscriptions revenue in EURm 2022 2023 2024 2025

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© ATOSS Software SE 202613 Strong development of recurring revenues driven by Cloud & Subscriptions Datenquellen: (1) Cloud MRR: Ordner 02_ARR → ARR neu_xx.2023 (2) ARR Total: Ordner 02_ARR → ARR neu_xx.2023 (3)Share of Cloud & Subscription Umsatz_EBIT – Tab: Investor Relations Automatisches Aktualisieren nicht eingestellt Graphiken hier stammen von Florian Kressirer (Corporate Development Folder) Achtung: Zahlen in () auch mit TT verknüpft Incremental Cloud & Subs. order backlog added (YoY)2 in EURm ARR Cloud & Subscriptions in EURmARR Total (Cloud & Subscriptions + Maintenance) in EURm 58.9 79.3 101.3 Q4 23 Q4 24 Q4 25 +35% +28% ARR backlog Total (12 months)1 in EURm 1. ARR backlog Total (12 months) = Total ARR + contractually committed additions, expansions and churn for the next 12 months 2. Incremental Cloud & Subs. order backlog added (YoY) = Year -on-year change in ARR Cloud & Subscription order backlog (12 month s) 58.9 79.3 101.3 36.5 39.2 38.3 Q4 23 Q4 24 Q4 25 95.4 118.4 139.6+24% +18% 20.9 21.5 23.3 Q4 23 Q4 24 Q4 25 +3% +8% Maintenance Cloud & Subscriptions 64.3 85.8 109.1 35.9 38.3 37.5 Q4 23 Q4 24 Q4 25 100.2 124.1 146.5+24% +18% Maintenance Cloud & Subscriptions Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202614 ATOSS Cloud & Subscriptions development by products FY 2025 8.9 Existing Customers ARR Customer Base 13.1 New & Migrated Customers ARR 12.2025 79.3 88.2 101.3 ARR 12.2024 +28% 111% Net Retention Rate GRR2 NRR3 ASES 58.1 ATC 14.1 96.3% 8.5 114.7% 66.7 7.9 74.6 94.8% 1.0 106.9% 15.1 2.4 17.5 Crewmeister 7.0 91.7% 6.4 2.7 9.2-0.6 Cloud & Subscriptions ARR1 in EURm 1. ARR (Annual Recurring Revenue) comprises the turnover generated by the company over the next 12 months on the basis of cur rent monthly cloud usage fees applicable as of the qualifying date 2. Gross Retention Rate: Percentage of existing customers or revenue retained over the last 12months, excluding expansion and new customers 3. Net Retention Rate: Revenues generated from existing customers as of PY - taking into account expansion and churn (based on PY ARR) Datenquelle: (1) ARR Reporting konsolidiert 77.4% Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202616 Core pillars of ATOSS’ growth strategy Growth leading the way for increased recurring revenue from Cloud business and an ever-growing global subscriber base Continuous steady growth while actively driving cloud transformation of business Continued focus on operational excellence to maintain and further expand margins of business Increase international revenue share outside the DACH region Further product development and enhancement, e.g., AI & Analytics Projections 2025-2027 EBIT margins ≥33% (Target: Year end 2027)Increasing share of recurring revenue ~ 75% (Target: Year end 2027) R&D investment ~16% of total revenue Advance full range strategy with solutions for enterprise, mid- market and SMEs customers (Crewmeister) Crewmeister outlook 2027 • ~27.000 customers • ARR of ~15m EUR • Reach profitability • ATOSS solution is deployed across most of the European countries and supports 11 software languages, enabling multilingual functionality • In 2025, 6% of revenue is generated outside the DACH region • We will focus on driving revenue in our existing European markets, to further expand international revenue share 2025-2027: Total revenue growth CAGR 14%

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© ATOSS Software SE 202617 Ambition ATOSS Cloud transformation (1/2) Growth leading the way for increased recurring revenue (model projection) 2022 59% 2023 65% 2024 70% 2025 ~72% 2026 guidance ~75% 2027 proj. ~80% 114 151 171 189 ~215 ~245 ~400 2030 ambition 58% +33% +13% +11% ~14%¹ Non Recurring Recurring 1. Compound Annual Growth Rate Revenue in EURm and growth in % (YOY) Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202618 Ambition ATOSS Cloud transformation (2/2) Growth leading the way for increased recurring revenue (model projection) 28% 66% 2025 ~6% ~22% ~72% ~5% ~16% ~79% 2027 proj. 2030 ambition2026 proj. 16% 40% 44% 2022 18% 33% 49% 2023 11% 31%78 108 125 141 ~162 ~191 ~320 58% 2024 6% +38% +15% +13% ~17%² Licenses Maintenance Maintenance/Cloud1 Cloud & Subscriptions 1. Depending on extent of transformation of existing on -premise customers into Cloud and subscription customers; 2. Compound Annual Growth Rate Software revenue in EURm and growth in % (YOY) Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202619 ATOSS - Growth projections Strong growth and margins while building recurring revenue Total revenue ~215 EURm EBIT margin ≥32% Increasing share of recurring revenue (Target: Year end 2027) ~75% Total revenue growth (Base: Year end 2025) CAGR 14% Software revenue growth (Base: Year end 2025) CAGR 16% EBIT margin (Target: Year end 2027) ≥33% Projections 2026 - 2027Guidance 2026

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© ATOSS Software SE 202621 Sustainability at ATOSS Our sustainability pillars (1/2) Customer and society • Data protection and data security • Customer satisfaction • Social and cultural activities Employees at ATOSS • Recruitment and retention • Continuous training and learning • Health promotion and recreation • Diversity

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© ATOSS Software SE 202622 Sustainability at ATOSS Our sustainability pillars (2/2) Integrity and compliance • Prevention of discrimination, corruption, bribery, respect for human rights • Compliance Management System – acting in accordance with all laws, social guidelines and values Environmental protection • Energy & CO2 reduction • Conservation of resources

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© ATOSS Software SE 202623 Sustainability at ATOSS Our goals (1/2) Customer and society Customers Goals by 2026: • Recurring revenue: ~72% • Revenue CAGR (2026-2027): 14% • Grow customer number: 25,200+ • Expand international customer base In addition: • Gross Retention Rate: ≥96%1 • Net Retention Rate: >110%1 • R&D investment: ~16% of total revenue • Net promoter score: 14 Social • Continued donations in the areas of culture, environment, children and social projects Employees at ATOSS Employee Experience Goals by 2026: • Employee Engagement Index: >80% • Leadership index: 3.7 • Employee Net Promoter Score: ≥25 • Working flexibility satisfaction index: ≥75% Diversity & Inclusion Goals by 2027: • Company-wide gender distribution: 50% female / 50% male • Gender distribution of managers: 40% female / 60% male • Gender distribution Executive Leadership Team: 30% female / 70% male 1. Excluding Crewmeister

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© ATOSS Software SE 202624 Sustainability at ATOSS Our goals (2/2) Integrity and Compliance Integrity and Compliance • Continuing to raise awareness of compliance and security issues (incl. compliance training) • Further internal training measures on topics such as equal treatment and compliance Information security • Recertification according to ISO/IEC 27001:2022 Environmental protection CO2 footprint Goals by 2045: • Net Zero Strategy: reduction of Scope 1-3 greenhouse gas emissions by a total of 90 percent

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© ATOSS Software SE 202625 Employees at ATOSS Working with Passion & Purpose „We live diversity and promote equal opportunities and inclusion” • Member of “Charta der Vielfalt” • Employees from around 47 countries • 60% male/40% female > ongoing diversity goals by 2027 „We are top employer“ • Employee Engagement Index: 84% “Individuality in Working Life - Employee Well-being in Focus” • Hybrid and flexible working model • Sport offers and health management • Team and after-work events “The team is the key to sustainable success” • Intensive and structured onboarding • Detailed career model • Working in diverse teams / short • Decision-making paths • Meaningful working environment “Continuous employee growth” • 856 employees (12/24: 820)

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© ATOSS Software SE 202626 People & Organization update 206 208 288 310 317 162 187 180 192 203110 144 158 192 193 201 79 91 106 115 125 135 2020 2021 173¹ 256¹ 2022 2023 2024 2025² 557 630 693 775 820 856 Administration Sales & Marketing Services Innovation & Development 1. In FY 2022 shift of Cloud Services Team from Services Department to Innovation & Development Department 2. Including 11 employees in Global Capabilities Center Personnel development (headcount) Q1-Q4 2025 Key updates: Transformation of go-to-market organization is completed: • S&M headcount per Q4 2025 within targeted range Continued investment in AI: • Planned build-up of AI Hub in Bangalore

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© ATOSS Software SE 202628 North Star strategy ATOSS‘ product roadmap and main adjacent investment areas 1. GA: General Availability; 2. FCS: First Customer Shipment AI services: Absence rate forecasting for illness & vacation (GA1: 01.08.25) − Reduced configuration effort and increased forecast quality Workforce intelligence: AI-based analytics (GA1: 01.08.25) − Strategic insights on fluctuation, overtime and absences Integration of external workers: Standardized interface according to the SETU standard for the integration of external workers (FCS2: 01.08.25) − Effective mitigation of worker shortages Self scheduling: Self Scheduling (Medical) Staff Center Mobile (GA1: 01.08.25), Desktop (GA1: 01.10.25) − Enhanced employee experience Notification management (Q1/25) − Improved proactive communication Employee self services (Q2/25) − Enhanced user experience Planning self services (Q4/25) − Increased flexibility in scheduling Employee chat (Q3/25) − Improved communication DATEV integration (Q4/25) − Seamless payroll processes Absence management NextGen (Q3/25) − Enhanced absence management with more flexible edits, requests, and absence types Time tracking NextGen (Q4/25) − Introduction of supplements and better support for flex workers Shift planner NextGen (Q1/26) − Improved shift assignment and introduction of shift swaps AI-based crew administrator (Q2/26) − Introduction of set-up guide and proactive AI recommendations and alerts Integration hub platform (2026+) AI-based analytical solutions Analytics solution to help customers gain better and deeper insight into their data Agentic AI Autonomous systems for faster execution, reduced effort, and proactive, scalable decision-making Voice of the employee Focus on employee feedback to integrate sentiment into decision making Collaboration solutions App for frontline employees to streamline processes for deskless workers Main investment areas:

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© ATOSS Software SE 202629 North Star strategy: Crewmeister Crewmeister continues successful development Crewmeister Folie: Customer Dev. 2023 incl. Bookings 12,3 2023 excl. Bookings 11,6 → Story Abschlag bei Bookings (unsicherheit) auf 12,0 Angleichung auf excl. Bookings in 2024 Sales Development Aktualisierter FP 24 intern: 6,5 FC 24: 5,5 MRR / Customer Ratio Auf Zählweise bis 2024: 34,7 Neu Kundenzählweise: 36,8 CAC average 23: 302 CLTV average 23: 1730 CLTV Average 23 neue Zählweise: 1845 Ratio 5,8 Ratio Neue Zählweise: 6,1 Churn average (12months): 1,52% Gross Profit Margin (YTD): +79,1% 2020 2021 2022 2023 2024 2025 2026 proj. 2027 proj. 2030 ambition 4.1 6.0 8.6 12.0 15.1 17.9 ~22.0 ~27.0 ~40.0 34% 2020 2021 2022 2023 2024 2025 2026 proj. 2027 proj. 2030 ambition 1.0 1.7 2.6 4.3 6.3 8.1 ~11.0 ~14.0 ~25.0 53% 25.4 30.5 29.9 34.7 39.8 42.7 2020 2021 2022 2023 2024 2025 2026 proj. 2027 proj. 2030 ambition ~45.0 ~48.0 ~56.0 11% Customer development (k) Sales development (EURm) MRR/Customer ratio (EUR)4 Avg. growth rate Avg. growth rate Avg. growth rate Highlights • Positive impact by BAG decision • New product features developed • High customer satisfaction Key metrics • Avg. Customer Acquisition Costs1: 697 EUR • Avg. Customer Lifetime Value2: 2,243 EUR • CLTV/CAC-Ratio: 3.2 • Avg. monthly churn rate3: 1.57 % • Cloud gross margin: +85% Outlook 2026 • ~22k Customers • ARR of ~11,5m EUR • Further margin improvement 1. CAC (Customer acquisition cost) (ø 2025): cost of resources for the business in order to acquire a new customer. Customer acquisition cost involves sales and marketing costs 2. CLTV (Customer lifetime value) (ø 2025): estimate of all the future gross profits to be accumulated from a relationship wi th a given customers 3. Churn rate (12/2025): Ratio, in the current year (12 month avg.), of customer terminations (number) and the total number o f customers (number) with an existing contract at the end of the year/month 4. MRR/Customer Ratio shows the monthly recurring revenue per customer calculated on the MRR and Customers as of the 31st of December each year +17% +25% +6% Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202630 Revenue break even Cloud vs. On-premises model Revenue/Payment scheme 50 50 50 50 50 120 20 20 20 20 0 20 40 60 80 100 120 Year 1 Year 2 Year 3 Year 4 Year 5 Cloud (SaaS) On-Premises • Cloud services lead to service optimization and cost savings for ATOSS customers • Service optimization and cost savings allow for increased accumulated revenue after 3.5 years 50 100 150 200 250 120 140 160 180 200 0 50 100 150 200 250 Year 1 Year 2 Year 3 Year 4 Year 5 Cloud (SaaS) On-Premises Cloud vs. On-Premises Cloud vs. On-Premises (accumulated)

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© ATOSS Software SE 202631 Financial KPIs Financial strength excellent base for further growth Net income in EURm Dist. Dividend per share1 in EUR EPS1 in EUR Operational Cashflow in EURm Equity Ratio in % Market capitalization in EURm 2021 2022 2023 2024 2025 48% 53% 54% 56% 61% 1,726 1,107 1,662 1,816 1,836 2021 2022 2023 2024 2025 19.3 19.4 35.8 45.5 48.4 2021 2022 2023 2024 2025 20% 17% 24% 27% 1.22 1.22 2.25 2.86 3.04 2021 2022 2023 2024 2025 0.92 1.69 2.13 0.50 2021 2022 2023 2024 2025 0.84 0.91 1.42 26.3 26.3 52.7 59.5 47.2 2021 2022 2023 2024 2025 Special RegularNet income margin As of year end 26% 1. The previous year’s figures have been adjusted due to stock split in 2024; rounding up to two decimal places Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202632 31 Jan 2023: Preliminary FY 2022 results Total rev. growth: +17% Software growth: +19% Recurring rev. growth: +35% EBIT Margin: 27% Forecast for the years 2023- 2025 raised 31 Jan 2022: Preliminary FY 2021 results Total rev. growth: +13% Software growth: +18% Recurring rev. growth: +23% EBIT Margin: 28% Mid-term sales growth guidance upgraded to 13-17% The ATOSS Share Share price performance1 (01.2021 – 12.2025) Share price in EUR 0 50 100 150 01.01.2021 01.01.2022 01.01.2023 01.01.2024 01.01.2025 31.12.2025 ATOSS SDAX TecDAX Automatisches Aktualisieren nicht eingestellt 47% 15% 12% 31 Jan 2024: Preliminary FY 2023 results Total rev. growth: +33% Software growth: +38% Recurring rev. growth: +35% EBIT Margin: 34% 31 Jan 2025: Preliminary FY 2024 results Total rev. growth: +13% Software growth: +15% Recurring rev. growth: +26% EBIT Margin: 37% 1. SDAX/TecDax Index rebased on ATOSS‘ share price of EUR 78,25 as of 01/04/2021

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© ATOSS Software SE 202633 ATOSS stock High performer in European software and HCM stocks HCM SaaS European Software SAP Nemetschek ATOSS SDAX TecDAX Workday TeamViewer 93% 50% 47% 15% 12% -5% -86% Paylocity -23% 1. ATOSS, Nemetschek, TeamViewer, SAP, Invision, SDAX: XETRA -Opening price 01/04/2021 and -Closing price 12/30/2025; Paylocity: Frankfurt Stock Exchange-Opening price 01/04/2021 and - Closing price 12/30/2025; Workday: Tradegate-Opening price 01/04/2021 and - Closing price 12/30/2025 Share price performance1 (01.2021 – 12.2025)

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© ATOSS Software SE 202634 The ATOSS share Dividend policy EPS1 per 31. December in EUR Dividend1 in EUR 0.36 0.36 0.19 0.44 0.48 0.58 0.59 0.70 0.85 1.12 1.22 1.22 2.25 2.86 3.04 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 0.15 0.18 0.18 0.22 0.29 0.29 0.64 0.84 0.91 1.69 2.13 2011 2012 0.73 0.18 2013 2014 2015 0.46 0.24 2016 2017 2018 0.65 0.35 2019 2020 2021 2022 0.50 0.92 2023 2024 2025 2026 0.91 0.70 1.00 1.42 2.282 Special Dividend Dividend 1. The previous year’s figures have been adjusted due to stock split in June 2024; Rounding up to 2 decimal places; 2. Subject t o shareholder resolution in AGM ATOSS stays true to its dividend policy with continuity to the previous year

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© ATOSS Software SE 202635 Software Consulting Hardware & Others 140,680 EURk Recurring: 131,895 EURk Non-recurring: 8,785 EURk 39,628 EURk 8,949 EURk Revenue 189,258 EURk Gross profit 148,315 EURk Cost of sales (40,943 EURk) Operating profit 68,128 EURk Operating expenses (80,187 EURk) Net profit 48,367 EURk Financial Earnings 3,813 EURk Tax (23,573 EURk) S&M (33,975 EURk) R&D (28,559 EURk) G&A (17,193 EURk) Other (461 EURk) Income statement FY 2025 Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202636 ATOSS sales by segment1 22% 32%15% 18% 10% Retail ProductionServices Healthcare & Social Services other Logistics 3% 14% 86% Retail-Fashion Retail - Food, DIY, etc. 1. FY 2025/revenue ATOSS’ five largest customers account for approx. 7 percent of company‘s sales

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© ATOSS Software SE 202637 Cost ratios Actual 2025 (Plan 2025) vs. Plan 2026 R&D as % of total revenue S&M as % of total revenue G&A as % of total revenue Cost of sales as % of total revenue 21.6% Datenquellen: Umsatz_EBIT – Tab: ppt_ratios Automatisches Aktualisieren nicht eingestellt ACHTUNG: G&A Veränderung hart auf -0,3 pp angepasst Englische Formatierung aufpassen -2.5 pp1 15.1% 18.0% 9.1% -0.9 pp1 -1.2 pp1 +0.9 pp1 Actual cost ratios 2025 in % R&D as % of total revenue S&M as % of total revenue G&A as % of total revenue Cost of sales as % of total revenue 23.2% Planned cost ratios FY 20262 in % 15.7% 20.3% 8.8% Total revenue: EUR 189.3m 1. Delta to Plan 2025 2. Excl. additional cost reserve of 1.5% for specific investments Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202638 Financial development – impressive cash position Datenquellen: (1) Dokument “Financials_XX.XX.2023 incl CFL” -> Monatsordner -> Financials (2) Liquidity: „Entwicklung_Finanzlage“ (Ordner: Z:\Finanzbuchhaltung\Banken \_Bank_Kontoauszüge_Hom eOffice\Finanzstatus) → Entwicklung Finanzlage 2023 Automatisches Aktualisieren nicht eingestellt Achtung Change in Cash & Cash equivalents hart eingetragen (damit linke und rechte Darstellung deckungsgleich) Achtung: in Q1 2024 nochmal Verknüpfung prüfen ! FY 2025 59,472 -10,925 -30,106 25 12/24 47,232 -1,000 -37,502 -170 12/25 18,466 8,560 Operating activities Investment activities Financial activities Exchange rates 82,667 5,221 4,307 20,022 12/24 91,227 5,264 6,453 20,289 12/25 112,216 123,232 8,560 EURk Cash & cash equivalents Investment funds Gold Fix. Long-term deposits Change in cash & cash equivalents Cash flow in EURk Liquidity in EURk Note: All 2025 figures are preliminary and unaudited

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© ATOSS Software SE 202639 Income statement (IFRS) Q1-Q4 2025 EURk1 Q1-Q4 2025 % of total revenue Q1-Q4 2024 % of total revenue YoY % Total revenues 189,258 100% 170,625 100% 11% Software 140,680 74% 124,856 73% 13% Licenses 8,785 5% 13,540 8% -35% Maintenance 39,211 21% 38,963 23% 1% Cloud & Subscriptions 92,684 49% 72,353 42% 28% Consulting 39,628 21% 35,943 21% 10% Hardware 3,679 2% 5,801 3% -37% Others 5,271 3% 4,025 2% 31% EBITDA 72,883 39% 67,829 40% 7% EBIT 68,128 36% 63,427 37% 7% EBT 71,941 38% 66,982 39% 7% Net profit 48,367 26% 45,451 27% 6% EPS in euro 3.04 2.86 Note: All 2025 figures are preliminary and unaudited 1. Figures may not sum exactly due to rounding differences.

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© ATOSS Software SE 202640 Income statement (IFRS) Q4 2025 vs. Q4 2024 EURk1 Q4 2025 % of total revenue Q4 2024 % of total revenue QoQ % Total revenues 49,931 100% 44,736 100% 12% Software 37,502 75% 33,366 75% 12% Licenses 2,739 5% 3,805 9% -28% Maintenance 9,631 19% 9,872 22% -2% Cloud & Subscriptions 25,132 51% 19,689 44% 28% Consulting 10,052 20% 9,074 20% 11% Hardware 846 2% 1,133 3% -25% Others 1,530 3% 1,163 3% 32% EBITDA 21,200 42% 18,828 42% 13% EBIT 19,961 40% 17,684 40% 13% EBT 21,442 43% 18,811 42% 14% Net profit 14,311 29% 12,573 28% 14% EPS in euro 0.90 0.79 Note: All 2025 figures are preliminary and unaudited 1. Figures may not sum exactly due to rounding differences.

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© ATOSS Software SE 202641 Cash Flow Statement (IFRS) Operating activities EURk1 2025 2024 Earnings before taxes 71,941 66,982 Depreciation 4,755 4,402 Financial income -4,263 -3,895 Financial expenses 450 340 Non-cash personnel expenses 2,050 -574 Change in net current assets Trade receivables -1,647 1,118 Other current non-financial assets -148 -622 Capitalized contract costs -4,165 -1,946 Other assets -90 96 Trade accounts payable 626 -420 Other current financial and non-financial liabilities 3,201 776 Other current and non-current provisions 814 254 Contractual liabilities 118 -550 Interest received 1,816 2,339 Interest paid 0 -5 Income taxes received 214 998 Income taxes paid -28,440 -9,820 Cash flow generated from operating activities (1) 47,232 59,472 Note: All 2025 figures are preliminary and unaudited 1. Figures may not sum exactly due to rounding differences.

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© ATOSS Software SE 202642 Cash Flow Statement (IFRS) Investment and financing activities EURk1 2025 2024 Cash flow from investment activities Expenditure for the purchase of tangible and intangible assets -1,000 -925 Expenditure for the purchase of financial assets -10,000 -20,000 Proceeds from the disposal of financial assets 10,000 10,000 Cash flow generated from investment activities (2) -1,000 -10,925 Cash flow from financing activities Redemption element leasing liabilities IFRS 16 -3,498 -3,182 Interest element leasing liabilities IFRS 16 -124 -121 Dividends paid -33,880 -26,802 Cash flow generated from financing activities (3) -37,502 -30,106 Changes in cash and cash equivalents - total (1) - (3) 8,730 18,441 Cash and cash equivalents at the beginning of the period 82,667 64,201 Effects of exchange rate changes on cash and cash equivalents -170 25 Cash and cash equivalents at the end of the period 91,227 82,667 Note: All 2025 figures are preliminary and unaudited 1. Figures may not sum exactly due to rounding differences.

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© ATOSS Software SE 202643 Balance Sheet (IFRS) Assets EURk1 December 31, 2025 December 31, 2024 Non-current assets Intangible assets 114 168 Property, plant and equipment 3,898 4,099 Rights of use 6,377 6,105 Capitalized contract costs 11,449 7,285 Other non-current financial assets and precious metals 2,231 1,657 Total non-current assets 24,069 19,314 Current assets Trade receivables 10,960 9,313 Other current financial assets and precious metals 30,302 28,413 Other current non-financial assets 3,594 3,458 Cash and cash equivalents 91,227 82,667 Total current assets 136,083 123,851 Total assets 160,152 143,165 Note: All 2025 figures are preliminary and unaudited 1. Figures may not sum exactly due to rounding differences.

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© ATOSS Software SE 202644 EURk1 December 31, 2025 December 31, 2024 Equity Subscribed capital 15,906 15,906 Capital reserve 2,048 -2 Equity deriving from unrealized profits/losses 1,286 749 Unappropriated net income 77,912 63,425 Equity attributable to the equity holders of the parent company 97,152 80,079 Non-controlling interests -109 -109 Total Equity 97,043 79,970 Non-current liabilities Pension provisions 993 1,817 Other non-current provisions 670 2,658 Non-current lease liabilities 3,676 3,609 Deferred tax liabilities 3,907 2,907 Total non-current liabilities 9,246 10,991 Current liabilities Trade accounts payable 2,586 1,959 Contractual liabilities 3,300 3,182 Current lease liabilities 3,159 2,980 Other current financial liabilities 10,468 7,365 Other current non-financial liabilities 17,795 17,651 Tax liabilities 13,601 18,914 Other provisions 2,954 152 Total current liabilities 53,863 52,203 Total equity and liabilities 160,152 143,165 Balance Sheet (IFRS) Equity and Liabilities Note: All 2025 figures are preliminary and unaudited1. Figures may not sum exactly due to rounding differences.

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