A family­ business
on a growth trajectory


Development, planning and production of clean room systems


Renningen, Germany / Basel, Switzerland

Start of the partnership



100% of business shares

Clean-tek – at the core of E3’s clean room technology portfolio

Founded in 1986 by Albrecht Ritter and later expanded by his son Felix, renowned Clean-tek Group provides the full suite of clean room solutions for the pharmaceutical sector and other industries. Clean-tek develops and manufactures products ranging from wall, ceiling and door systems to laminar flow modules, pass-throughs, personnel and material air-locks, decontamination showers and weighing booths. All Clean-tek products comply with worldwide hygienic manufacturing rules and standards (e.g. FDA, GMP, ISO).

On a growth trajectory

With its principal sites in Renningen (Germany) and Basel (Switzerland), together with a smaller production site in Serbia, the clean room specialist’s activities currently focus on the German and Swiss markets.

The clean room market offers excellent opportunities for the company to continue its growth trajectory, since it is driven by investments from the biotech, pharmaceutical and semiconductor industries, along with an ever-growing quantity of hygiene and manufacturing standards, for example in the cosmetics and food industries. All those industries post growth rates of between 5% and 7% p.a.

“My goal was to team up with a technically excellent, trustworthy and dependable partner to guide the transformation of our family business into a mid-sized industrial firm. E3 Holding SE’s perspective and experience in helping companies grow whilst preserving the interests of our employees won me over. With E3 Holding SE as a partner, Clean-tek is geared towards long-term growth and will expand its current market position. I am so pleased to have found a trustworthy and dependable partner in the E3 team, and I look forward to remaining Clean-tek’s Managing Director as it continues its journey.”

Giving growth a helping hand

E3 Holding and Clean-tek Group’s management team are working towards a common goal: creating a leader in Europe’s clean room markets, building upon Clean-tek’s excellent market positioning by means of selected company acquisitions.

Internally, process optimisation, technological innovation, improved HR management, and implementation of E3 Holding’s ESG strategy have unlocked significant potential.


Olivier Weddrien

Founder · Board member

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Olivier Weddrien

Founder · Board member