Onterris, Inc. · NYSE:ONT
Onterris — Investor Presentation (June 2026)
35 slides from Onterris's investor presentation, June 2026
Slide 1: Investor Presentation June 2026
Investor Presentation June 2026 Integrated Environmental Infrastructure Solutions and Technology Platform
Slide 2: Industrial Activity and Global Requirements Drive Demand for Integrated Environmental Solutions
Industrial Activity and Global Requirements Drive Demand for Integrated Environmental Solutions Thank you for expressing your interest in Onterris. By integrating capabilities, Onterris delivers scalable environmental infrastructure solutions supporting mission-critical industrial activity. To discu
Slide 3: Disclosures
Disclosures Statements contained herein and in the accompanying oral presentation contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements may be ident
Slide 4: Contents
Contents Market Position & Competitive Advantage Section 01 Integrated Environmental Infrastructure & Technology Platform Section 02 Driving Results & Value Creation Section 03 Innovation & Technology-Driven Growth Section 04 Appendix Section 05 4
Slide 5: Market Position & Competitive Advantage
Market Position & Competitive Advantage Defining a new standard where environmental demand is accelerating across industries. 5
Slide 6: Scaled Platform Operating Within A Large and Expanding Market
Scaled Platform Operating Within A Large and Expanding Market Demonstrated growth, expanding client relationships & significant market opportunity Scale Growth Relationships Market +6,100 +24% 96% Large, growing Clients internationally, Revenue CAGR since 20192 Client recurring revenue fragmented ma
Slide 7: Driving to Ongoing Revenue, Margin and EPS Improvement
Driving to Ongoing Revenue, Margin and EPS Improvement Revenue: Consolidated Adj. EBITDA1 as EPS: Targeting >$1B in ~3 years, a % of Revenue: GAAP EPS growing faster than with annual organic growth1 Targeting >300 bps improvement Consolidated Adj. EBITDA1 of 7% to 9% over 3 to 5 year period Integrat
Slide 8: Structural Environmental Demand Across a Large Global Market
Structural Environmental Demand Across a Large Global Market Expected growth of 4% annually $1.9T Core Structural Drivers • Energy development & power supply • Industrial activity & infrastructure modernization • Water treatment & contaminant management • Global environmental regulations & defense s
Slide 9: Growing Faster than Large and Expanding Addressable Market
Growing Faster than Large and Expanding Addressable Market $500B+ Structural Competitive Global Serviceable Addressable Advantages Market1: consulting, testing, and Proven Scaled Platform treatment markets • Integrated multi-solution model • Founded in 2012; #7 in ENR 2025 Top All-Environmental • Em
Slide 10: The Onterris Opportunity
The Onterris Opportunity Large Market Integrated Platform, Consistent Technology Opportunity Diverse Sectors Performance & Innovation ~$500B global addressable market Integrated consulting, monitoring, Delivered financial growth across Patent-protected technologies and with durable tailwinds testing
Slide 11: Integrated Environmental Infrastructure & Technology Platform
Integrated Environmental Infrastructure & Technology Platform Demonstrating scalable growth, embedded client relationships, and expanding technology-driven solutions 11
Slide 12: Diverse Private-Sector Relationships Support Durable Demand
Diverse Private-Sector Relationships Support Durable Demand Advancing mission-critical industrial activity 3-Year Average Sector Revenue ~90% private-sector client base Primary Sectors Comprise ~90% of Revenue Diversified exposure across sectors Clients rely on environmental infrastructure Energy In
Slide 13: Environmental Infrastructure Moving To Integrated Platforms
Environmental Infrastructure Moving To Integrated Platforms Traditional Environmental Integrated Environmental Increasingly Preferred Services Model Infrastructure Platform Client Outcomes Single service providers Measurement Consulting & Analytics • Improved coordination Disconnected workflows & Ad
Slide 14: Integrated Solutions Deepen Client Relationships Over Time
Integrated Solutions Deepen Client Relationships Over Time Initial Compliance Support Scales into Initial Air Monitoring Builds Over Time, a Strategic, Multi-Solution Engagement Increasing Client Share of Wallet 1. Initial Engagement in 2020: Monitoring, 1. Initial Engagement in 2023: Monitoring, Co
Slide 15: Driving Results & Value Creation
Driving Results & Value Creation Creating new avenues for expansion through connected capabilities and scalable delivery 15
Slide 16: Exceeded Every Key Objective in 2025
Exceeded Every Key Objective in 2025 Another record-breaking year for Onterris evidences our commitment to planet and progress +12.7% +9% 92.5% 2.5X organic growth1 cross-selling1 improved cash flow balance sheet leverage Long-term framework 7-9%. Increased from 53% in Our objective was to Full rede
Slide 17: Continuous Growth in a Dynamic Decade
Continuous Growth in a Dynamic Decade ($ in millions) Revenue Consolidated Adj. EBITDA $840-900 $831 $696 $624 $125-130 $546 $544 $116 $96 $73 $79 $328 $66 $234 $52 $30 2 2019 2020 2021 2022 2023 2024 2025 2026E +24% Revenue CAGR1 +25% Consolidated Adj. 1EBITDA CAGR 1) 2019 – 2025 CAGR. Consolidated
Slide 18: Strategic Capital Framework
Strategic Capital Framework Organic Portfolio Maintain Share Repurchase Investments Optimization Balance Sheet Strength Program Prioritize high-return Plan to restart smaller, bolt-on Strong liquidity and cash flow $30.0M of capacity1 investments in proprietary and highly accretive acquisitions gene
Slide 19: Acquisition Focus on Geographic & Service Expansion
Acquisition Focus on Geographic & Service Expansion History of Growth and Success Disciplined Framework Track Record Key Metrics 5 to 6 ~18% Historically, mid- Maintain leverage <3x to high-single- (up to 3.25x temporarily Average annual Average revenue digit multiples for right target) acquisitions
Slide 20: Long-term Priorities
Long-term Priorities Organic Growth & Strong Cash Flow Strategic Capital Margin Expansion Generation Allocation Prioritize working capital Maintain flexibility to drive Revenue: optimization and margin shareholder returns and Targeting >$1B in ~3 years, improvement to drive robust preserve strategic
Slide 21: Innovation & Technology-Driven Growth
Innovation & Technology-Driven Growth Developing solutions that connect science, data, engineering and operational excellence to strengthen our long-term competitive advantage 21
Slide 22: Grounded in science. Proven in practice.
Grounded in science. Proven in practice. We develop practical environmental technologies that connect science, engineering, field operations and data intelligence to solve increasingly complex challenges. Our innovation strategy is focused on scalable, deployable solutions that strengthen 31 Patents
Slide 23: Patent-Protected Water Treatment Technologies Address Known & Emerging Contaminants
Patent-Protected Water Treatment Technologies Address Known & Emerging Contaminants We develop diverse water treatment technologies with transferable applications across drinking water, groundwater, landfill leachate, biosolids, municipal wastewater and industrial process water systems. Increasing s
Slide 24: Turning Innovation Into Recurring Revenue
Turning Innovation Into Recurring Revenue Technologies evolve scalable environmental solutions, recurring compliance programs, and long-term client engagement Detect & Assess Develop & Validate Deploy & Optimize Commercialize A Sample of Our Existing Commercial Applications • PFAS remediation for co
Slide 25: Emerging Growth Opportunities Expand the Platform
Emerging Growth Opportunities Expand the Platform Pharmaceuticals Waste Industry Energy Exports GLP-1 production is driving Landfill leachate management, biosolids Expansion of LNG export capacity and demand for ultrapure water systems, treatment and contaminant destruction global methane-intensity
Slide 26: Onterris by the Numbers
Onterris by the Numbers 3,500 31 Experts and specialist Patents 2,300+ 70 Technical employees PhDs 6,100+ 120 Offices Clients Worldwide Globally Strategic Geographic Footprint Office locations in areas supportive of favorable 8 NYSE ONT environmental operations and proximity to clients Accredited La
Slide 27: Onterris Outlook In Partnership with Financial Times: Strong Demand For Our Services
Onterris Outlook In Partnership with Financial Times: Strong Demand For Our Services Pulse Check: Understanding Our Clients From 4Q25 through 1Q26, in collaboration with the Financial Times’ research team1, Onterris surveyed 500 senior decision makers and interviewed environmental and sustainability
Slide 28: Onterris Outlook Key Findings
Onterris Outlook Key Findings • Environmental performance is tied to growth outcomes, not Business performance increasingly just compliance requirements. 54% of executives say depends on how well companies manage environmental performance is central to long-term growth, environmental risks, resource
Slide 29: Investment Highlights
Investment Highlights International reach and diverse Uniquely integrated across environmental customer base support recurring revenue services consulting, testing and treatment and cross-selling upside Large TAM and secular tailwinds backed by Strong organic growth coupled with regulatory and corpo
Slide 30: Appendix
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Slide 31: Non-GAAP Financial Information
Non-GAAP Financial Information Brand and Resegmentation: On April 17, 2026, Montrose Environmental Group, Inc. rebranded to Onterris, Inc. Beginning in the first quarter of 2026, the Company realigned its reportable segments to reflect updates made to the organizational structure and operating model
Slide 32: Non-GAAP Financial Information (Continued)
Non-GAAP Financial Information (Continued) Management compensates for these limitations by using these measures as supplemental financial metrics and in conjunction with our results prepared in accordance with GAAP. We encourage investors and others to review our financial information in its entiret
Slide 33: Reconciliation of Net Loss to Consolidated Adjusted EBITDA
Onterris, Inc. Reconciliation of Net Loss to Consolidated Adjusted EBITDA Year Ended 1) Represents non-cash stock-based compensation expenses related to (i) option awards issued to December 31 employees, (ii) restricted stock grants issued to directors and selected employees. 2) Includes financial a
Slide 34: Investing for Planet & Progress
Investing for Planet & Progress Our innovative solutions and integrated expertise deliver stronger environmental compliance and performance, generating new value for stakeholders and securing a better future for clients, communities and the ecosystems we all depend on. Thank you for supporting our m
Slide 35: Thank You
} Thank You *Onterris