AEA Investors and BCI Acquire Rensa Filtration from Audax Private Equity
October 8, 2026
AEA Investors’ Middle Market Private Equity team and British Columbia Investment Management Corporation acquired Rensa Filtration from Audax Private Equity, which retained a minority stake alongside Rensa’s management team. The investors plan to support expansion across North America and Europe through investments in engineering and manufacturing, broader service and distribution capabilities, and further acquisitions.
- Buyers
- AEA Investors, British Columbia Investment Management Corporation (BCI)
- Targets
- Rensa Filtration
- Sellers
- Audax Private Equity
- Industry
- Manufacturing
- Location
- Illinois, United States
- Transaction Type
- Buyout
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Rensa Filtration Acquires Aero Filter
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Rensa Filtration acquired Aero Filter, a Michigan-based distributor and service provider of air filtration solutions. The acquisition adds local technical sales and on-site service capabilities to Rensa’s regional network and expands its reach across Michigan.
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Rensa Filtration (Audax-backed) Acquires IREMA-Filter GmbH and Aeolus Filter Corporation
September 16, 2025
Manufacturing
Rensa Filtration, a platform backed by Audax Private Equity, has acquired German filter-media specialist IREMA-Filter GmbH and its U.S. subsidiary Aeolus Filter Corporation. The deal expands Rensa’s manufacturing and technology capabilities in microfiber and nanofiber filter media while extending its geographic footprint across Europe and North America; financial terms were not disclosed.
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Rensa Filtration Acquires Air Filtration Co., Inc.
June 19, 2025
Industrial Services
Rensa Filtration, a manufacturer of advanced commercial air filtration systems and a portfolio company of Audax Private Equity, acquired Air Filtration Co. The acquisition expands Rensa’s national growth plan, strengthening its Midwestern footprint and adding Air Filtration Co.’s product and service capabilities.
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Rensa Filtration Acquires Air Filtration Co., Inc.
January 27, 2025
Manufacturing
Rensa Filtration, a PE-backed manufacturer and distributor of air filtration products, has acquired Air Filtration Co., Inc., a family-owned maker and distributor of spray booth and industrial air filters with production facilities in Lancaster, California and Corydon, Iowa. The deal expands Rensa's geographic footprint in California and Iowa and adds Air Filtration Co.'s spray booth filtration product line to Rensa's portfolio.
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Rensa Filtration Acquires The Filter Shop
September 25, 2024
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Rensa Filtration has acquired The Filter Shop, a regional air-filter distributor and service provider with distribution centers and service teams in Omaha, Nebraska and Des Moines, Iowa. The deal (Rensa is Audax-backed) expands Rensa's regional footprint and service capabilities across education, healthcare, food manufacturing and data center end markets and gives The Filter Shop access to Rensa's manufacturing and R&D resources.
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Audax Private Equity Acquires Rensa Filtration
August 15, 2022
Manufacturing
Audax Private Equity announced the acquisition of Rensa Filtration, a U.S.-based manufacturer of mission-critical air filtration products. The transaction (terms undisclosed) represents a sponsor-to-sponsor sale from The Edgewater Funds (with prior co-investor Duchossois Capital Management); Rensa CEO Brandon Ost and management will remain in place with a significant ownership stake as Audax pursues a buy-and-build growth strategy.
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