5. April 2023

With CONSTELLATION CAPITAL, Kebos finds an investor who wants to reach market potentials in the field of water and air hygiene arising from growing ESG requirements.

The shareholders of the KEBOS Group, Germany’s leading specialist for water and air hygiene, have gained an investor with CONSTELLATION CAPITAL 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.

In a transaction process led by atares* 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.

Atares 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, atares 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 atares: Rainer Wieser (Partner, Munich) and Petr Maxmilian Hajkr (Senior Associate, Munich).

Read more about the atares range of services here

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 atares

Atares is the digital M&A boutique for technology-driven midcap companies in Germany and sees itself as a pioneer for the digitalization of the M&A industry. Founded in 2001, atares has advised more than 200 transactions in more than 20 years. The focus is on transaction volumes between EUR 10 and 100 million of mostly owner-managed companies. Since November 2023, the company formerly known as Proventis Partners, Munich, has been operating under the new company name atares GmbH. Atares has long-standing personal contacts with corporate and Private Equity investors and M&A advisors in Europe, North and South America and Asia. Highly specialized expertise for the market, empathy for people and passion make atares a sought-after M&A partner for the tech champions of tomorrow. More than 20 employees at atares in Munich and Düsseldorf manage their projects via the in-house developed digital M&A dealfloor ( – for value-adding, efficient transactions with the best user experience.


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*At the time of the transaction, atares traded under the name Proventis Partners GmbH Muenchen