GEF Capital Partners Invests in McMillan-McGee and ORIN Technologies to Launch Pollution Remediation Platform

GEF Capital Partners Acquires Controlling Interest in EnviroMix

August 17, 2020

Environmental Services

GEF Capital Partners acquired a controlling interest in EnviroMix, a Charleston-based provider of water and wastewater mixing and process control technologies. EnviroMix's management retained a significant equity stake and will partner with GEF to accelerate product development and expand into new municipal and industrial markets.

ORIX Capital Partners Acquires Majority Interest in Odin

December 15, 2021

Environmental Services

ORIX Capital Partners acquired a majority interest in Odin, a Rocklin, California–based provider of environmental and geotechnical construction, remediation, and dredging services. Odin's founders and management will retain a significant equity stake as ORIX positions the company as a platform for growth within its environmental services and ESG thematic focus; financial terms were not disclosed.

Incline Equity Partners Acquires Alliance Environmental Group

January 18, 2022

Environmental Services

Pittsburgh-based private equity firm Incline Equity Partners has acquired Alliance Environmental Group, a California-headquartered provider of environmental remediation and indoor air quality services. Alliance, previously a portfolio company of MFG Partners and ORIX Corporation USA Private Equity Solutions, operates 14 locations across CA, AZ, NV and WA; Incline plans to support geographic and capability expansion and further consolidation in the sector. Terms were not disclosed; Baird served as financial advisor to Alliance.

Keystone Capital Partners with Pinchin Ltd. and PM Environmental to Build North American Environmental Services Platform

February 22, 2022

Environmental Services

Keystone Capital Management, L.P. has entered into an investment partnership with Canadian environmental consulting firm Pinchin Ltd. and U.S.-based PM Environmental, LLC to combine capabilities and expand geographic reach across North America. Terms were not disclosed; the deal creates a PE-backed platform aimed at accelerating add-on acquisitions, capability expansion, and broader service coverage for corporate real estate, developers and government clients.

Whitewater Management Acquires Orion Water Solutions

March 3, 2025

Environmental Services

Whitewater Management, a Hillcore Group–owned fluid management company based in Calgary, has acquired Orion Water Solutions, a Permian Basin–based provider of advanced wastewater treatment systems. The deal integrates Orion’s DAF, chlorine dioxide and biological treatment technologies into Whitewater’s service offering to expand capabilities across oil & gas, mining and municipal infrastructure and support North American growth.

Coalesce Capital Acquires Miller Environmental Group

September 11, 2024

Environmental Services

Coalesce Capital has entered into a definitive agreement to acquire Miller Environmental Group, a Calverton, New York–based provider of waste, industrial, and environmental services, from GenNx360 Capital Partners. Miller operates 30 locations across the United States serving over 1,800 customers; Coalesce plans to invest in human capital, technology, and add-on acquisitions to expand the company's branch and facility network.