International law firm Bird & Bird has advised Caverion Deutschland GmbH on the planned acquisition of WISAG Automatisierungstechnik GmbH & Co. KG (WAT), the firm announced. The WISAG Group is the seller. Completion is scheduled for the turn of the year 2026/2027 and is subject to clearance by the German Federal Cartel Office.
WAT has been active in building automation in Germany since 1988 and offers measurement, control and regulation technology solutions. With 168 employees at seven locations, WAT supports building automation systems from planning and installation through to ongoing operation. Its offering includes building management technology and energy management as well as a service with 24/7 on-call support. Most recently, WAT generated annual revenue of around EUR 27 million.
Chambers and Co. since 2004.
Caverion provides cross-trade technical building services and develops technical solutions to improve the performance of properties, reduce energy consumption and CO₂ emissions, and ensure reliable building operation. Caverion operates at 18 locations and employs more than 2,000 people across Germany. It is part of Assemblin Caverion, one of the leading providers of technical building services in Northern Europe; the group employs around 20,000 people in nine countries and generated revenue of EUR 3.7 billion in 2025.
With the planned acquisition, Caverion is strengthening its building automation business. According to the firm, the market is shaped by higher requirements for energy efficiency and decarbonisation, increasingly data-driven building operation and the need for modernisation of existing buildings. With WAT, Caverion gains additional expertise, including experience in developing its own products and solutions for building technology.
Caverion was advised by a Bird & Bird team led by partner Stefan Münch together with senior counsel Michael Gaßner and associate Cedric Rao, LL.M. (Utrecht University) (all Corporate, Munich); partner Dr. Ralph Panzer, counsel Dr. Maximilian Koch and senior associate Christoph Lutz (all Employment, Munich); partner Thomas Hey and associate Leonie Bleilevens (both Employment, Düsseldorf); and partner Dr. Henriette Picot and senior associate Thomas Magosch (both Commercial, Munich).
For detailed information, as well as the picture copyright, please see the law firm’s original article here: https://www.twobirds.com/de/news-and-deals/2026/germany/bird-and-bird-beraet-caverion-bei-der-geplanten-uebernahme-von-wisag-automatisierungstechnik
