Onterris, Inc. Common Stock
Key Metrics
Market Snapshot
About
Onterris, Inc. Common Stock (ONT) is an environmental services company headquartered in North Little Rock, Arkansas. Founded in 2012, it operates in the United States, Australia, Canada, and other international markets. The company was formerly known as Montrose Environmental Group, Inc. and changed its name to Onterris, Inc. in May 2026. It is known for providing a wide range of environmental support services to industry and government.
The company organizes its work into three segments: Assessment, Permitting and Response; Measurement and Analysis; and Remediation and Reuse. Through the first of these, it offers scientific advisory and consulting services that support environmental assessments, emergency response and recovery, toxicology consulting, and environmental audits and permits. These permits cover current operations, facility upgrades, new projects, decommissioning, and development work.
The other segments cover testing and cleanup. Onterris, Inc. provides environmental testing and laboratory services, including source and ambient air testing and monitoring, leak detection, and multi-media laboratory analysis of air, soil, stormwater, wastewater, and drinking water. It also delivers engineering, design, and implementation services built around treatment technologies that clean contaminated water or remediate soil.
The company serves a broad customer base. Its clients include oil and gas, utilities, technical services, industrial manufacturing, transportation, chemicals, renewable energy generation, telecommunications, and engineering industries, along with local, state, provincial, and federal government entities. By combining consulting, laboratory analysis, and remediation across these markets and several countries, ONT ties its revenue to demand for environmental compliance, monitoring, and cleanup. Its segmented structure lets it support clients from initial assessment and permitting through measurement and on to the treatment and reuse of contaminated media.