Onterris Inc (ONT) is an environmental services company that provides scientific, consulting, measurement, and remediation services to private and public sector clients across the full lifecycle of their environmental needs. Revenue comes from fixed-price contracts, milestone-based fixed-price contracts, and time-and-materials (T&M) engagements across three segments: Assessment, Permitting and Response; Measurement and Analysis; and Remediation and Reuse. The company operates in a highly fragmented market with no single dominant competitor, positioning itself as a multi-service platform through organic growth and acquisitions, having completed over 70 acquisitions since its founding in 2012. In FY2025, 62.1% of revenue came from clients purchasing more than one service, up from 53.3% in FY2024. The Measurement and Analysis segment generated approximately 29.6% of total revenue for the fiscal year ended December 31, 2025. No acquisitions were completed in 2025, though acquisitions remain a stated long-term growth strategy.

Revenue model

Fixed-price contracts, milestone-based fixed-price contracts, and time-and-materials (T&M) billing across three service segments. Contract terms range from purchase-order-based arrangements to multi-year master services agreements. Most contracts are terminable at client discretion with cost and fee reimbursement through termination date.

Products and services

Assessment, Permitting and Response: environmental assessments, emergency response and recovery, toxicology consulting, environmental audits and permits, regulatory navigation. Measurement and Analysis: optical gas imaging (OGI) for hydrocarbon leak detection, real-time air contaminant detection at ultra-trace concentrations, proprietary software and measurement technologies. Remediation and Reuse: engineering, design, and implementation of contaminated water treatment and soil decontamination solutions.

Customers and end markets

Private and public sector clients with complex, often non-discretionary environmental service needs. Government clients represent a disclosed customer category. End markets include industrial operations, facility development and decommissioning, infrastructure projects, and regulatory compliance-driven remediation. No single customer concentration percentage disclosed in the excerpts.

Value-chain role

Outsourced environmental services provider sitting between regulated industrial and government clients and environmental regulatory bodies. Acts as scientific advisor, permitting agent, field measurement operator, and remediation engineer. Does not own client properties, underlying liabilities, or material equipment used in projects.

Geographic exposure

International operations referenced in risk factors. Primary market is the United States. No specific country-level revenue breakdown disclosed in the excerpts.

Source: SEC 10-K, filed 2026-02-26

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