Onterris, Inc.
Montrose Environmental Group, Inc. provides environmental services to private- and public-sector clients across the lifecycle of environmental needs, including project planning, operating compliance, decommissioning, remediation and emergency response. Its customers span oil and gas, utilities, government,… From the company’s description.
Over the twelve months to Sep 30, 2026, Onterris, Inc. reported revenue of $751.50M, down 9.1% from a year earlier, and a net loss of $10.56M. Its operating margin was 1.3%, and operations generated $87.34M in cash. In fiscal 2025, it reported revenue of $830.54M, up 19.3% from fiscal 2024, and a net loss of $0.84M.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Onterris, Inc. does
In the company’s own words
Montrose Environmental Group, Inc. provides environmental services to private- and public-sector clients across the lifecycle of environmental needs, including project planning, operating compliance, decommissioning, remediation and emergency response. Its customers span oil and gas, utilities, government, manufacturing, chemicals, transportation, renewable energy and telecommunications. The company operates through three segments: Assessment, Permitting and Response, which provides scientific consulting, assessments, permitting and emergency response services and generated 37.0% of 2025 revenue; Measurement and Analysis, which tests and analyzes air, water and soil and generated 29.6%; and Remediation and Reuse, which designs and implements treatment solutions for contaminated water and soil and generated 33.4%. Its services include environmental audits, emissions monitoring, laboratory analysis, leak detection and contaminant treatment. Since its founding in 2012, Montrose has completed more than 70 acquisitions to expand its services and geographic reach. It had approximately 3,500 employees as of December 31, 2025. Its website is www.montrose-env.com.
Company details
- Sector
- Industrials
- Industry (SIC)
- Professional Services
- Headquarters
- IRVINE, CA
- Fiscal year end
- December
- CIK
- 1643615
- SIC
- 8742
Financial performance, year by year
Fiscal 2020–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Onterris, Inc. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · Onterris, Inc.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
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