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Corporate presentation May 2025
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Certain information set forth in this presentation contains “forward-looking information”, including “future-oriented financial information” and “financial outlook” , under applicable securities laws (collectively referred to herein as forward-looking statements). Except for statements of historical fact ,the information contained herein constitutes forward-looking statements and includes, but is not limited to, the (i) projected financial performance of the Company; (ii) the expected development of the Company’s business, projects, and participations; (iii) execution of the Company’s vision and growth strategy; (iv) completion of the Company’s projects that are currently underway, in development or otherwise under consideration; (v) renewal of the Company’s current supplier and other material agreements; and (vi) future liquidity, working capital, and capital requirements; (vii) currency exchange rates, most notably the EUR/USD exchange rates; (viii) changes in laws and regulations, including tax regulations; (ix) the impact of acquisitions including and related integration issues and reorganization measures, and (x) the general competitive conditions that, in each individual case, apply at a local, regional, national, and or global level. Forward-looking statements are provided to allow (potential) investors the opportunity to understand management’s beliefs and opinions in respect of the future so that they may use such beliefs and opinions as one factor in evaluating an investment. These statements are not guarantees of future performance and undue reliance should not be placed on them. Such forward-looking statements necessarily involve known and unknown risks and uncertainties, which may cause actual performance and financial results in future periods to differ materially from any projections of future performance or result expressed or implied by such forward-looking statements. Even if future results of IONOS Group SE meet the expectations expressed, they may not be indicative of the results or developments in any subsequent periods. Although forward-looking statements contained in this presentation are based upon what management of the Company believes are reasonable assumptions, there can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materiallyfrom those anticipated in such statements. The Company undertakes no obligation to update forward-looking statements if circumstances or management’s estimates or opinions should change except as required by applicable securities laws. The reader is cautioned not to place undue reliance on forward-looking statements. In the interests of clear and transparent reporting, financial presentations, the annual financial statements and interim statements of IONOS Group SE, as well as any ad-hoc announcements pursuant to Art.17 MAR and other financial information contain additional financial performance indicators to those required under International Financial Reporting Standards(IFRS), such as EBITDA, EBITDA margin, adjusted EBITDA, adjusted EBITDA margin, EBIT and free cashflow. Information on the use, definition and calculation of these performance measures is provided in the Annual Consolidated Financial Statements 2024 of IONOS Group SE or is explained in anassociated footnote. 2 Disclaimer
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Strengthening our position as the leading SMB digitalization partner and trusted cloud enabler. OUR VISION 3
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4 1) Equivalent to total revenue excl. revenue from AdTech business ( sedo); 2) FY2024, adj. EBITDA is defined as EBITDA adjusted for either non-recurring items or non-operating items; 3) Defined as adj . EBITDA less maintenance capital expenditures divided by adj. EBITDA. Maintenance capital expenditures = capital expenditures for replacements and in the ordinary course of business; 4) Leverage 31.12.2024, defined as Net Debt / LTM adj. EBITDA; 5) Based on external revenues Digital Solutions & Cloud; 6) NPS as per Q4 2024; 7) Custom er Acquisition Cost (CAC) calculated as the amount of recurring and variable marketing expenses (in €) divided by the number of customers gained over a period, Customer Lifetime Value (CLTV) calculated as (1/churn)*Average Revenue Per Customer*Gross Profit contribution; 8) incl. discounts Expanding the IONOSphere in our FY 2024 €452mn adj. EBITDA2 (29.0% margin) Attractive profitability ~6.32mn customers Unparalleled European SMB customer access €1.56bn total revenue (9.6% yoy growth) High revenue visibility and predictability1 €15.85 ARPU (+7.5% yoy)5 Attractive profitability +15x CLTV/CAC7 Targeted and efficient customer acquisition ~95% cash conversion rate3 Highly cash generative 1.94x Leverage4 Deleveraging by ~0.5x per year going forward ~80% recurring revenues1 Subscription-based business model >34 ~NPS of >326 Loyal customer base ~12 months payback8 Quick and predictable recovery of CAC
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51 ) including ~€11mn revenue from hosting services to United Internet companies (2% of total revenue) 2) Annual revenue USA, Canada, Mexico FY 2024 Leading the European SMB digitalization ~22 mn Domains listed and 6mn domains parked European market leader Exceptional EBITDA margins and cash conversion rates paired with strong growth Market positions in 6 core European markets #1 #2 Ready for profitability within the next year EBITDA reinvested into future growth Web Presence & Productivity €274mn Revenue (62%) Cloud Solutions Ad Tech former Aftermarket Annual revenue in North America ~130mn2 €446mn Total revenue Q1 20251 €131mn Adjusted EBITDA Q1 2025 29.4% Adjusted EBITDA margin Q1 2025 €330mn1 Revenue (74%) 34.2% Adj. EBITDA margin €45mn Revenue (10%) €117mn Revenue (26%) Digital Solutions & Cloud 15.6% Adj. EBITDA margin
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6 All-in-one solutions, first-class support, and reliable infrastructure Source: Company information 1) Refers to revenue from contracts with customers One-stop-shop for all digitalization needs of SMBs and solo entrepreneurs. E-mail & Office Value Added Services Domains Web Hosting & Sitebuilder Server Hosting E-commerce Public Cloud Private Cloud Managed Services Bare Metal Cloud Trusted European cloud provider for SMBs and enterprises Web Presence & Productivity Cloud Solutions SMBs typically spending €10-20 per month Strong customer support organization (Personal Service Agent & 24/7 multi-channel support) ~90% FY 24 revenue1 ~10% FY24 revenue1 SMBs, mid-market & public sector, typically spending €300-500+ per month
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• NPS increased from 32.1 to 34.1 yoy • Brand awareness increased significantly in all our core markets • Increasing marketing efficiency – marketing expenses/revenue decreasing from 7.9% to 7.1% in 2024 • Investments will continue to crystalize value in the coming years 7 Brand investments drive measurable returns
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8 Customer acquisition showing increasing ROI • Continous improvement of our CLTV/CAC • Improve retention and reduce churn, which is already best-in-class • Focus on valuable customer growth 15.1 15.4 CLTV/CAC1 2023 2024 2025E 1) Customer Life Time Value/Customer Acquisition Cost (excl. brand marketing)
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9 • Independence from US hyperscalers and full data control are becoming increasingly important for organizations of all sizes – in Cloud, but also in Web Presence & Productivity • Digital Sovereignty is moving to the top of the priority list for the private and public sector • IONOS relies on the highest level of security and digital sovereignty, coupled with outstanding service at a better cost- performance ratio • IONOS is the natural provider to play a key role in the upcoming transition A new era for Europe – increasing desire for a sovereign cloud
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Championing a large, attractive and fast-growing market driven by secular trends Sources: Company Data Analysis, company information, McKinsey: The SMB Market for Digitization and Cloud Solutions, 1) SMB core target group shown in the chart includes companies with <250 FTE in 2020; 2)Total number of IONOS customers (mostly SMBs), as of December 31, 2023; 3) McKinsey: The SMB Market for Digitization and Cloud Solutions, Cloud North America and server hosting North America deducted from total McKinsey figures to align with IONOS current addressability ~6.4mn IONOS customers2 >90mn SMBs in North America and Europe ~58mn SMBs across Europe SMBs: The Hidden Gems of the Digital Landscape - A Huge and Untapped Core Market 16 38 89 14 22 343 15 55 2015A 2021A 2026F IONOS addressable market ’15-263 €bn Web Presence & Productivity Cloud CAGR 35%CLOUD ‘21–26 29% ‘15–21 8%WEB PRESENCE & PRODUCTIVITY 9% 96%+ of SMBs in Europe are micro SMBs and solo-preneurs Only ~50% of solo-preneurs and micro SMBs have a website of SMBs with websites use an e-commerce solution Only ~27% 10
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Dominating Europe's Webhosting Market with Unmatched Scale and Diverse, High-Growth Opportunities 1)Refers to webhosting market shares based on Company Data Analysis and HostAdvice. Europe includes Germany, UK, Spain, France, Poland and Austria. Market size (in €) of the European web hosting market in 2021 by country based on Company Data Analysis. IONOS shares based on Web Presence & Productivity revenue in 2021. OVH France based on estimated revenue in 2021 and Company Data Analysis. Other competitors based on number of domains hosted by web hosting companies as published by HostAdvice as of September 2022. Hyperscalers excluded since not considered part of relevant peer group. 2 excl. Aftermarket Footprint in 18 markets 1st 51% 1st 21% 2nd 13% 2nd 11% 2nd AUSTRIA GERMANY SPAIN UK POLAND FRANCE 10% 1st 19% Market share 1st in Europe overall1 Webhosting market share in Europe (%)1 >2x 11 ~€130mn revenues in North America2 with solid growth and profitability
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Cloud 12 AI Model Hub Sovereign multimodal AI platform IONOS GPT Privacy focused AI Assistants AI powered products Artificial Intelligence • is boosting efficiency internally • is already integrated in 8 out of 10 product lines, increasing to 10 of 10 in 2025 • is a catalyst for digitalization • is a revenue driver on the back of additional use cases and upselling offering unmatched ease-of-use AI@IONOS – pioneering the future Marketing Copywriting Design Code
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131) ISG Provider Lens: Public Cloud –Services & Solutions, Hyperscale Infrastructure & Platform Services, Germany 2024 We’re a leading platform for secure and scalable solutions1 IONOS offers powerful, broadly diversified, secure and cost-effective cloud services for customers from all industries. The offering is constantly being further developed and adapted to market conditions. Sovereign cloud offering that includes a broad security package and guarantees that the data is processed GDPR-compliant and in a highly secure storage system IONOS is Leader in the area of Hyperscale Infrastructure and Platform Services Preferred Vendor Cloud Solutions Leader 2023 Germany Platinum Award Cloud service provider Public Cloud – Services and Solution 2024 Germany1 Awards PRODUCT CHALLENGER CONTENDER MARKET CHALLENGER LEADER COMPETETIVE STRENGHTLow High COMPETETIVE ATTRACTIVNESS HighLow DATAGROUP Google T-Systems noris network IBM Oracle plusserver Exoscale Grass-Merkur Alibaba Cloud Tencent Cloud WIIT CloudSigma Digital Ocean STACKIT Microsoft AWS
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Copyright © IONOS Group SE 2025 14 The ultimate one-stop-shop for end- to-end digitization Protect your brand with a domain Grow your online business with smart do-it-yourself and do-it-for-me solutions to attract more customers Communicate your professional identity with company branded e-mail Business Mail For domains that have already been rewarded 1 2 4 6 8 3 5 7 Set up your website and present your business online MyWebsite Now eCommerce Website Builder “The first orders came from abroad!” Wohlfühlmomente Landau (cosmetics online shop) Enrich your presence with e-commerce capabilities and sell online Digitize your business and processes with a trusted partner that values privacy and security Leverage cloud computing, scalable infrastructure and storage solutions as your business scales “My customers can now find my business details anytime!” Anmut.Bar (cafe, bar)
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Boost sales and pricing power with up- and cross-selling Upward trend in services per customer from successful up- & cross selling Strong market position and broad product portfolio allowing for targeted price adjustments and up- and cross-selling ARPU development by cohort Avg. ARPU per month in €1 Avg. number of services per customer1 0 5 10 15 1 months 11 months 21 months 31 months 41 months Jan 21 Jan 22 Jan 23 15 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 2020 2021 20252022 2023 2024 1) for IONOS brand
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´ 161) Source: Destatis (Statistisches Bundesamt) Driving sustainability through our commitment to UN Global Compact Energy intensity (MWh/revenue €mn) Adj. gender pay gap1 Length of employment (in years) Innovating the industry SECA Euro Stack IPCEI CIS 6.5 7.7 2023 2024Average in Germany IONOS 6.0 % 2.4 % 85.0 73.7 2023 2024
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17 Our financial performance and guidance for sustainable growth
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Successful up- & cross selling and pricing power Churn remains at best-in-class level of ~1% per month 18 1) Based on external revenues Digital Solutions & Cloud 2) Historical customer base is adjusted retrospectively by -0.03m customers each quarter, after harmonization of the policy at subsidiaries in the context of the annual financial statements as of 31 December 2024 The core business delivers strong operational performance Customers net additions in k Growing ARPU and continuous customer ARPU in € per month1 Customers in millions2 60 40 30 50 70 20 20 50 80 +170 2023 2024 Q4Q3Q2Q1 2023 Q4Q3Q2Q1 2024 Q1 2025 14.6 6.11 Q3 15.0 6.16 Q4 15.9 Q1 15.7 6.25 Q2 15.9 6.27 Q3 16.6 6.32 Q4 16.7 6.40 Q1 14.5 6.04 Q1 14.7 6.08 Q2 6.23 ARPU Customers CAGR ~7% CAGR ~3% 2025
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Slightly higher marketing expenses compared to prev. year 373.0 446.3 Q1 2025 delivered strong profits Industry leading growth with high visibility Total revenue (€mn) Adj. EBITDA margin +19.7% Q1 2024 Q1 2025 Attractive profitability Adj. EBITDA (€mn) Q1 2024 Q1 2025 105.8 [135.6] [+4.6] 28.4% 29.4% 131.0 +23.8% 19
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307.3 329.6 20 Strong growth across segments in Q1 2025 Digital Solutions & Cloud Total revenue (€mn) Adj. EBITDA margin 65.7 116.7 +7.3% Q1 2024 Q1 2025 AdTech Total revenue (€mn) Q1 2024 Q1 2025 Adj. EBITDA margin 30.3% 34.2% 19.0% 15.6% +77.7%
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253.8 273.7 Digital Solutions & Cloud delivering solid growth Web Presence & Productivity1 Revenue (€mn) +7.9% €10.7m Hosting services to United Internet group companies in Q1 2025 (Q1 2024: €11.5mn) +7.3% Q1 2025 DS&C revenue yoy Q1 2024 Q1 2025 Q1 2024 Q1 2025 21 23.0% 28.1% 104.8 42.1 45.2 +7.5% Cloud Solutions1 Revenue (€mn) Solid growth of the Web Presence & Productivity business due to customer growth and successful cross- and upselling 1 ) in the context of Group-wide standardization, some products were reclassified and reallocated between Web Presence & Productivity and Cloud. Revenue in Cloud Solutions increased by €1.9m in Q1 2024 and revenue in Web Presence & Productivity decreased accordingly. The historical and the adjusted revenue distribution is shown on the Key Figures Sheet on the corporate website.
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+7.5% yoy growth Public Cloud Managed Cloud Private Cloud Demand for Data Sovereign Cloud products continues to increase Public Cloud growing ~12% yoy – solid growth in Q1 Private Cloud growing ~7% yoy Managed Cloud growing ~3% yoy, diluting overall growth in Cloud Solutions 22 7 7 24 25 11 13 Q1 2024 Q1 2025 €42.1mn €45.2mn +12% +7% +3%
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Starting transition to RSOC 81.4 75.8 71.9 75.9 65.7 72.7 80.2 93.7 116.7 23 The AdTech business evolves to unlock new growth Q1 2023 Q2 2023 Q3 2023 Q4 2023 Q1 2024 Q2 2024 Q3 2024 Q4 2024 Q1 2025 Q2 2025 E Q3 2025 E Revenue in €mn +77.7% Revenue yoy in Q1 2025 Google introduced a new product/contract called RSOC (Related Search On Content), on top of their Google AdSense for Domains product, providing additional revenue potential going forward 18.2mn Adj. EBITDA in Q1 2025 ~15.6% Adj. EBITDA margin Q1 2025 Accelerated product migration Q4 2025 E
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2.2 1.4 13.7 13.5 Well invested asset base ensures low, predictable maintenance capex • Total CAPEX as % of total revenue at 3.3% (prev. year: 4.3%) • Low and predictable maintenance CAPEX requirements • Majority of growth capex is related to Cloud Solutions • Expected CAPEX for FY 2025E: €80 – 90mn (CAPEX/total revenue of ~5%) 24CAPEX figures refer to CAPEX excl. leasing; 1) Maintenance capital expenditures (excl. additions to right-of-use assets) include capital expenditures for replacements in the ordinary course of business; 2) Growth capital expenditures defined as total CAPEX, excluding maintenance CAPEX Maintenance CAPEX 1 Growth CAPEX 2 Total CAPEX 0.6% 3.7% 0.3% 3.0% 4.3% 3.3% Q1 2024 Q1 2025 €15.9mn €14.9mn % Total revenue
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25 1) Free cash flow (FCF) is defined as cash flow from operating activities, less capital expenditures, plus payments from disposals of intangible assets and property, plant and equipment 2) Adjustments for either non-recurring items or non-operating items (i.e. LTIP, stand-alone costs) Strong and highly predictable Free Cash Flow generation Q1 2025 adjusted EBITDA to (adjusted) Free Cash Flow1 (FCF) bridge in €mn 131 63 59 23 FCF -4 Leasing FCF aLAdj. EBITDA Interest -32 Share buyback FCF comparable -6 Adjustments2 -15 CAPEX -25 Taxes 2 LTIP/SAR -8 Payout LTIP -16 Working Capital/others -4 Q1 2024 FCF aL: €66mn
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1,016 960 917 855 842 26 1) Net Debt is the sum of liabilities to banks (31.03.2025: €797mn), non-current liabilities to related parties (31.03.2025: €170mn), current liabilities to related parties (31.03.2025: €6mn) and current liabilities to banks (31.03.2025: €9mn), less receivables from related parties (31.03.2025: €107mn), less cash and cash equivalents (31.03.2025: €34mn) at the end of the period; 2) as of 31.03.2025, calculated as weighted average interest rate of gross debt; 3) Calculated as Net Debt / Adj. EBITDA LTM Fixed-interest debt secures stability and removes refinancing risk Q1 2024 5.03%2 Fixed annual interest rate maturity on December 15, 2026 ~1.8x Leverage3 as of March 31, 2025 2.5 2.4 2.2 1.9 1.8 5.3 5.3 5.2 5.2 5.0 5.0 Net Debt1 €842mn1 Net debt as of March 31, 2025, comprising of an external bank loan and a shareholder loan of United Internet, less receivables UI Leverage3 (Net debt/adj. EBITDA) Avg. interest rate (fixed) Q2 Q3 Q4 Q1 2025 Q1 2024 Q2 Q3 Q4 Q1 2025 Q1 2023 Q2 Q3 Q4 Q1 2025 Q4 €170mn shareholder loan outstanding 2024
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Additional growth opportunities from strategic acquisitions Focus: Expansion of market leadership in Europe Sector Focus: Web Presence & Productivity 27 Internet Factory Unified product platform Technology stack with >1 million cores in 32 data centers1 joint group developments Expansion of market share Growth of customer base 1) o/w 9 fully owned and 23 co-location data centers Product acquisitions Seamless integration, due to unified product platform
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Driving growth with our 2025 guidance Digital Solutions & Cloud AdTech Expected revenue development2 Digital Solutions & Cloud 11.6% ~8% FY 2024 FY 2025E1 Cloud Solutions AdTech Total Adj. EBITDA 13.3% 15 - 17% €312mn €520mn€452mn FY 2023 FY 2024 FY 2025E 1) Guidance for revenue is based on constant currency; 2) illustrative 28 Revenue Revenue Adj. EBITDA margin 32.9% ~35% Web Presence & Productivity 11.8% 7 - 8% Expected revenue development2 Q4 2024 Q1 2025 Q2 2025 Q3 2025 Q4 2025 Accelerated product migration to RSOC New pricing structure WPP boosting revenue growth +~8% +11.6% +7.0% Q1 2025 7.3% 7.5% €117mn €131mn 34.2% 7.9% €400mn
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29 Reaffirming our mid-term guidance for continued growth ~10% Total revenue growth (CAGR) ~35% Adj. EBITDA margin 5-6% CAPEX (% on revenue) Maintenance ~8% CAGR & Growth ~4% of total revenue ~9% Web Presence & Productivity revenue growth (CAGR) ~20% Cloud Solutions revenue growth (CAGR) High single digit AdTech revenue growth (CAGR)
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Website Builder: AI is unleashing limitless possibilities of website creation • SMBs struggle building a website on their own - limited time, lack of knowledge, finite creativity • Users face problems to craft adequate texts and to create reach • AI-powered website builder was kicked-off in May 2023 and we are perpetually upgrading and enriching the available features (i.e. AI Image Generator, AI Page Generator, AI SEO tool) 30 64% of customers choose AI over classic onboarding 25% Faster time to publish ~30% increased first week activation Quality of content increased significantly with AI Positive adoption of AI features:
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Public sector projects and ITZBund • IONOS sets up a completely self-contained enterprise cloud environment in ITZBund data centers (“air-gapped” Cloud) • 5 years – first block built in Q4 2024 Perfectly positioned for further projects Audited and certified in multiple areas 31
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32 Appendix
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1 2 Billing carve-out / stand- alone costs / others EBITDA to adj. EBITDA bridge Employee stock ownership program Cost of the billing carve-out from United Internet Group, cost for the establishment of IONOS as an independent group and others EBITDA reported LTIP EBITDA adjusted Q1 2025 EBITDA, adjustments and adj. EBITDA (in €mn) 1 2 Margin27.9% Margin29.4% 33 124.6 131.0 1.5 4.9
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Financial Overview in €mn Q1 2024 Q1 2025 Change yoy Total Revenue 373.0 446.3 +19.7% Adj. gross profit1 254.2 282.4 +11.1% Adj. EBITDA 105.8 131.0 +23.8% EBIT 74.2 97.2 +31.0% Adjusted EBT excl. non-cash valuation effects from a contingent purchase price liability 57.9 83.7 +44.5% Adjusted EPS in €/share excl. non-cash valuation effects from a contingent purchase price liability 0.31 0.44 +43.9% 341) Adjusted gross profit is calculated as revenue less cost of sales (excl. T&D and D&A)
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4.2% 63.8% 3.8% 1.1% 27.1% Helikon United Internet DWS Own Shares Others Shareholder structure • 2nd largest shareholder Warburg Pincus placed a total of 17.5 million shares (12.5 percentage points of share capital) in 3 tranches in September, December 2024 and end of March 2025. • Freefloat 36.2% (acc. DAX Equity Index Methodology) 1.1% 35
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Corporate presentation May 2025