Picture: f.l. Osvald Ringstad and Asbjørn Skaro
7 May 2006 – Norway-based Redox AS has entered into an agreement to acquire Filtra AS, which delivers water and air purification solutions to the aquaculture and maritime industries as well as onshore industrial applications.
Redox is a supplier of oxygen and water treatment systems that contribute towards improving fish welfare and biosecurity in the fish farming industry, while reducing the use of chemicals. The acquisition of Filtra further reinfoces Redox’s core water treatment competence and contributes towards strengthening its technology and solutions for water filtration and purification.
“Filtra is a unique center of excellence for filtration solutions. The company has extensive experience in the treatment of air, water and fluids, with a strong focus on delivering future-oriented solutions. Bringing Filtra into the Redox family enables us to offer fish farmers, the maritime sector and other industries an even more comprehensive portfolio of products and services,” says Asbjørn Skaro, CEO of Redox.
Water, fluids and air
Filtra is a supplier of products and solutions for the treatment of air, water and other fluids. Within the maritime sector and the aquaculture industry, Filtra delivers a wide range of solutions for particle removal and neutralisation of bacteria and other microorganisms, including UV disinfection of intake water for land-based aquaculture facilities and treatment for potable water on board vessels.
Filtra’s broad product portfolio includes UV disinfection systems, water treatment solutions, filter housings, filter cartridges and filter bags, automatic filters, chemical dosing systems, carbon filters, RO (reverse osmosis) systems, ventilation filters and potable water coolers. Filtra also delivers service, spare parts and maintenance of its products.
Filtra’s headquarter is located at Skodje, in Aalesund municipalty, Møre and Romsdal county in Norway. The company was established by Osvald Ringstad (70) in 2006. Ringstad will remain with the company until 1 September 2026. Following this date he will support Filtra as a consultant.
“After 20 years with Filtra, it is with both pride and a sense of sentiment that I prepare the company for its next chapter. The strong industrial fit with Redox is clear to see. We share a philosophy of being agile and of developing innovative solutions in close collaboration with our customers – delivering standard products where appropriate and tailored solutions when required. We look forward to becoming part of the Redox family,” says Osvald Ringstad, managng director of Filtra.
Filtra remains
Filtra AS will continue as a separate company, with its headquarters remaining at Skodje. The plan is to build on the existing organisation, which currently consists of nine employees.
One of Redox’s ambitions is to further expand the service footprint that Filtra has established along the Norwegian coast, enabling the delivery of improved and more comprehensive service and maintenance offerings to companies in the aquaculture industry, the maritime sector and other industries.
“Filtra is a well run company with highly competent people who are experts within their respective niches. That is something we intend to build on. Our goal is to create more activity and, over time, additional jobs,” says Asbjørn Skaro.
Redox is acquiring 100 per cent of the shares in Filtra, which reported revenues of approximately NOK 37 million in 2025. The parties have not disclosed the financial details of the transaction.
Redox’s majority owner is seafood investor Bluefront Equity.
“The backing of a professional and financially strong investor such as Bluefront enables us to make smart strategic moves, such as bringing Filtra and Trykkluftservice into the Redox family. Together, we can leverage each other’s experiense and product and service offerings, which ultimately benefit our customers,” concludes Asbjørn Skaro.
For further information, please contact:
Asbjørn Skaro, managing director, Redox
TEL: +47 982 47 299
