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Company Sale

Proventis Partners advised Kebos

Munich, April 11, 2023 – Business Services Transaction. Proventis Partners advised on the sale of KEBOS Group, a leading service provider for water and air hygiene, to a group of Swiss investors.

The transaction

The shareholders of the KEBOS Group, Germany’s leading specialist for water and air hygiene, have gained an investor with CONSTELLATION to further expand the strong growth potential in the quality management of (drinking) water and air, including the related inspection and maintenance services. The market for water and air hygiene services is becoming increasingly important, driven by increasing regulatory requirements, stricter ESG criteria and quality standards, and is therefore experiencing sustained and steady growth. At the same time, the laboratory service providers Dr. Brill + Kebos GmbH & Co.KG and Hygienic Solution Services GmbH will be fully integrated into the KEBOS Group.

In a transaction process led by Proventis Partners as M&A advisor, CONSTELLATION acquired a majority stake in KEBOS Group in a share deal. As part of CONSTELLATION, the group will remain operationally independent after the sale and, in addition to steady organic growth, plans to expand through acquisitions of other companies in the water and air hygiene sector as part of a buy and build strategy.

The role of Proventis Partners

Proventis Partners acted as exclusive M&A advisor to the shareholders of the KEBOS Group in the preparation and execution of the transaction, which was characterized by a complex shareholder structure. In addition to the overall management of a structured transaction process, the advisory services included the consolidation of the key financial figures of the entire complex corporate structure, the preparation of marketing and transaction documents, the identification and approach of potential investors, including management presentations, as well as support during the due diligence and transaction negotiations. With this transaction, Proventis Partners once again demonstrated its expertise and network in the business services sector with a strong link to ESG concepts and the execution of competitive processes. The transaction team of Proventis Partners: Rainer Wieser (Partner, Munich) and Petr Maxmilian Hajkr (Senior Associate, Munich).

About KEBOS Group

As a leading German group with a strong presence in Germany and Austria, KEBOS offers comprehensive services in the field of quality management of (drinking) water and air, including inspection, cleaning, maintenance, analysis and certified laboratory services. The group has extensive technological expertise. Its customers are mainly facility operators and property managers in the private, public, healthcare and hospitality sectors. For further information please visit


Founded in 1992, CONSTELLATION is a Swiss investment group headquartered in Freienbach on Lake Zurich. CONSTELLATION focuses on majority investments in companies based in Switzerland, Germany and Austria that operate in the Business Services, Education & Lifestyle, Healthcare and Financial Services sectors. Through an extensive circle of renowned and experienced industry partners (owners, CEOs and CFOs), CONSTELLATION pursues an active, value-creating investment approach at eye level with entrepreneurs. For more information, please visit https://www.

About Proventis Partners

Proventis Partners is a partner-led M&A advisory firm with a focus on mid-sized family businesses, corporate subsidiaries and Private Equity funds. With more than 40 M&A advisors, Proventis Partners is one of the largest independent M&A advisors in the German-speaking region and can look back on more than 20 years of M&A experience and more than 400 completed transactions. The M&A advisors with offices in Düsseldorf, Hamburg, Munich and Zurich are active in the sectors Industrials, Chemicals, Business Services, Consumer & Retail, as well as IT & Media. The exclusive membership in Mergers Alliance – an international partnership of leading M&A specialists – enables Proventis Partners to support clients in 30 countries in the most important markets worldwide. Mergers Alliance members, with more than 250 M&A professionals, provide Proventis Partners and thus its clients with unique access to local markets in Europe, North America, Latin America, Asia and Africa.