Onterris, Inc. · NYSE:ONT
Onterris — Q3 2026 Earnings Presentation
21 slides from Onterris's earnings presentation, Nov 5, 2026
Slide 1: 2026 Earnings: 3Q Results
2026 Earnings: 3Q Results November 5, 2026
Slide 2: 3Q26 Results
3Q26 Results • Our third-quarter results demonstrate meaningful Our team applies data-driven rigor and specialized progress against our commitments. We delivered expertise to deliver outcomes that help protect the higher Adjusted EBITDA1, a record quarterly planet while enabling progress. Consolidat
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: Disclosures
Disclosures Forward-looking statements speak only as of the date on which they are made and we undertake no obligation to update any forward-looking statement to reflect future events, developments or otherwise, except as may be required by applicable law. Investors are referred to the Onterris fili
Slide 5: Key Updates
Key Updates © Onterris • 3Q26 Earnings • 5
Slide 6: 3Q26: Record Quarterly Margin and Strong Cash Generation
3Q26: Record Quarterly Margin and Strong Cash Generation Higher profitability and disciplined execution despite lower reported revenue Consolidated Financial Highlights 3Q26 vs 3Q25 Core Business Momentum Revenue $203.0M, -9.7% Revenue growth in core consulting & treatment, together with Net Service
Slide 7: Balance Sheet Strength Supports Disciplined Capital Allocation
Balance Sheet Strength Supports Disciplined Capital Allocation Lower leverage and strong liquidity provide flexibility to pursue targeted acquisitions Balance Sheet Strength (as of 9/30/26) 3 Strategic Tuck-In Transactions in 2H26 2.9x Leverage Ratio Ambient Air Monitoring Expansion Expanded presenc
Slide 8: Investment Highlights
Investment Highlights International reach and diverse Uniquely integrated across environmental customer base support recurring revenue services consulting, testing and treatment and cross-selling upside Large TAM and secular tailwinds backed by Strong organic growth coupled with regulatory and corpo
Slide 9: 3Q26 and YTD26 Segment Results
3Q26 and YTD26 Segment Results
Slide 10: Consulting & Treatment Segment 3Q26 Performance
Consulting & Treatment Segment 3Q26 Performance (Compared to 3Q25) Revenue Comparison Reflects Prior-Year Event 3Q Revenue and Segment Adj. EBITDA ($ in millions, % as a percent of segment revenue) • 3Q26 Revenue of $142.0M compared to $161.9M in 3Q25 o Prior-year quarter included $45.4M of revenue
Slide 11: Consulting & Treatment Segment YTD 2026 Performance
Consulting & Treatment Segment YTD 2026 Performance (Compared to YTD 2025) Revenue Comparison Reflects Prior-Year Event, Partially Offset YTD Revenue and Segment Adj. EBITDA by Core Consulting Growth ($ in millions, % as a percent of segment revenue) • YTD 2026 Revenue of $382.2M compared to $452.5M
Slide 12: Measurement & Analysis Segment 3Q26 Performance
Measurement & Analysis Segment 3Q26 Performance (Compared to 3Q25) 3Q Revenue and Segment Adj. EBITDA Revenue Decline of $1.9M, or 3.0% ($ in millions, % as a percent of segment revenue) • 3Q26 Revenue decline primarily due to lower field services more Revenue 3Q26 3Q25 Normalize than offsetting the
Slide 13: Measurement & Analysis Segment YTD 2026 Performance
Measurement & Analysis Segment YTD 2026 Performance (Compared to YTD 2025) YTD Revenue and Segment Adj. EBITDA Revenue Decline Driven by Lower Field Services Revenue ($ in millions, % as a percent of segment revenue) • YTD 2026 Revenue of $176.1M compared to $184.8M Revenue YTD 2026 YTD 2025 o Decli
Slide 14: Appendix
) Appendix For Planet & Progress,
Slide 15: 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 16: 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 17: Reconciliation of Net Income (Loss) to Adjusted Net Income
Onterris, Inc. Reconciliation of Net Income (Loss) to Adjusted Net Income Three Months Ended September 30, Nine Months Ended September 30, 1) Represents non-cash stock-based compensation expenses related to option awards issued to employees and restricted stock grants issued to directors and selecte
Slide 18: Reconciliation of Net Income (Loss) to Consolidated Adjusted EBITDA
Onterris, Inc. Reconciliation of Net Income (Loss) to Consolidated Adjusted EBITDA Three Months Ended September 30, Nine Months Ended September 30, 2026 2025 2026 2025 Net income (loss) $ 8,986 $ 8,378 $ (2,338) $ 7,375 Interest expense 5,564 5,039 16,501 14,872 Income tax expense 2,273 7,281 4,922
Slide 19: Reconciliation of Revenue to Net Service Revenue
Onterris, Inc. Reconciliation of Revenue to Net Service Revenue For the Three Months Ended For the Nine Months Ended September 30, September 30, 2026 2025 2026 2025 Revenue $ 203,044 $ 224,888 $ 558,223 $ 637,265 Subconsultants and non-labor direct costs, including intercompany (46,307) (67,247) (11
Slide 20: 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 21: Thank You
Thank You © Onterris • 3Q26 Earnings • 21