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Onterris, Inc.

(formerly Montrose Environmental Group, Inc.) Active
5120 Northshore Drive,  North Little Rock,  Arkansas (AR),  72118,  United States
Sector: Environmental Entity: Public (New York Stock Exchange (NYSE), ONT) Founded: 2012
2012
Founded
Year established
2020
IPO Year
Public listing
33
M&A Activity
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About Onterris, Inc.
Onterris, Inc. (formerly Montrose Environmental Group, Inc.) is an environmental services company that provides testing, consulting, and treatment services to help clients manage environmental, regulatory, and operational risks to air, water, and soil. Its services include air emissions testing and ambient air monitoring; environmental laboratory analysis, including PFAS testing; environmental assessment and permitting; toxicology, health, and emergency response support; environmental consulting and advisory work; and water treatment and remediation, including PFAS removal. It serves industrial, energy, chemical, utility, and government customers in the United States, Canada, and Australia. In 2026 it brought its former operating brands under the single Onterris name: Montrose Environmental, ECT2, CTEH, Enthalpy Analytical, and Epic Environmental. Founded in 2012, the company is headquartered in Little Rock, Arkansas, United States.
Onterris, Inc. M&A Activity
33 Acquisitions
# Company Transaction Date Close Date Sector Country
View 33 M&A Acquisitions
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Key Executives & Professionals
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Frequently Asked Questions
What does Onterris, Inc. do?
Onterris, Inc. (formerly Montrose Environmental Group, Inc.) is an environmental services company that provides testing, consulting, and treatment services to help clients manage environmental, regulatory, and operational risks to air, water, and soil. Its services include air emissions testing and
Where is Onterris, Inc. headquartered?
Onterris, Inc. is headquartered in North Little Rock, Arkansas (AR), United States.
When was Onterris, Inc. founded?
Onterris, Inc. was founded in 2012.
What sector is Onterris, Inc. in?
Onterris, Inc. operates in the Environmental sector.
Who are the investors in Onterris, Inc.?
Investor information for Onterris, Inc. is available to AcquityData members. Sign up for free to access full ownership history.
How many M&A transactions has Onterris, Inc. been involved in?
Transaction data for Onterris, Inc. is available to AcquityData members.

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