Altos Partners Acquires JL Filtration from Clean Harbors

Mikisew Group Acquires ATB Private Equity's Stake in JL Filtration

July 6, 2023

Industrial Services

Mikisew Group purchased all of ATB Private Equity’s equity holdings in JL Filtration, increasing its ownership from a prior 2020 investment and now holding a majority interest. JL Filtration, a Canada-based provider of industrial filtration equipment, consumables, field services and rentals, will continue to work with existing investors including Altos Partners and management as Mikisew pursues strategic industry and geographic diversification.

Cleanwater1 Acquires PureAir Filtration

September 22, 2025

Environmental Services

Cleanwater1, a Baird Capital portfolio company, has acquired Atlanta-area PureAir Filtration, a manufacturer and servicer of gas‑phase air‑filtration systems and chemisorbent media. The acquisition expands Cleanwater1's gas‑phase solutions and aftermarket service capability for municipal and industrial water/wastewater and other industrial customers; PureAir's president Ashley Jameson will remain in place.

Filtration Group (Madison Industries) Acquires Molecular Products from Arlington Capital Partners

June 7, 2021

Manufacturing

Filtration Group, an affiliate of Madison Industries, has acquired Molecular Products, a global provider of pure air technologies, from Arlington Capital Partners. The deal brings Molecular's advanced chemical-based air treatment products and manufacturing capabilities into Filtration Group's portfolio to expand its life- and mission-critical filtration offerings across healthcare, defense and industrial markets.

Altas Partners Acquires DuBois Chemicals from The Jordan Company

August 28, 2019

Manufacturing

Altas Partners has signed and completed a definitive agreement to acquire DuBois Chemicals, a Cincinnati-based specialty chemical manufacturer and solutions provider, from The Jordan Company. Altas said it will support DuBois' next phase of growth through organic initiatives and selective acquisitions; financial terms were not disclosed.

Rensa Filtration (Edgewater-backed) Acquires Custom Filter, LLC

August 18, 2021

Manufacturing

Rensa Filtration, a portfolio company of Edgewater Growth Capital Partners IV, has acquired Custom Filter, LLC, a manufacturer of high-efficiency air filtration products including HEPA and ULPA filters. The deal is an add-on acquisition intended to expand Rensa’s engineered filtration product portfolio and OEM manufacturing capabilities.

Micronics (Vance Street-backed) Acquires SOLAFT Filtration Solutions

January 4, 2024

Manufacturing

Vance Street Capital’s portfolio company Micronics Engineered Filtration Group has acquired Solaft Filtration Solutions, a vertically integrated global industrial filtration solutions provider with manufacturing and R&D operations across Australia, Brazil, China and India. The deal expands Micronics’ engineered filtration product portfolio and geographic footprint, enhancing its ability to serve demanding end markets such as mining, power generation and water/wastewater treatment.