Lübeck/Kiel, August 11, 2025 – Gabler Maschinenbau GmbH, part of the Possehl Group, both headquartered in Lübeck, has announced the acquisition of SubCtech GmbH, based in Kiel. This strategic move unites two leading companies in the field of maritime technology, aiming to leverage shared sales channels and technology to strengthen their market position.
SubCtech is an internationally recognized provider of high-tech systems for maritime applications, particularly in underwater energy supply and ocean monitoring. Gabler Maschinenbau has long been a maritime technology leader in submarine and special-purpose machinery. By combining SubCtech’s technological and market expertise with Gabler’s decades of experience and global market reach, both companies are opening new growth opportunities.
As part of the acquisition, SubCtech also becomes a member of Gabler Ocean Group – a dedicated group of companies like Develogic GmbH and north.io GmbH that specialize in advanced ocean technology. Stefan Marx will continue to actively shape SubCtech’s success within the Gabler Group as managing director.
Strategic advantages at a glance
The integration of SubCtech gives the Gabler Group access to innovative solutions for the rapidly expanding market of underwater vehicle and offshore renewable and Oil+Gas battery systems, and also ocean monitoring systems. At the same time, SubCtech will benefit from Gabler’s Ocean Group robust sales infrastructure and maritime footprint. Joint development projects and the shared use of existing resources are expected to significantly boost the innovation and competitiveness of both companies.
“With the acquisition of SubCtech, we continue our clear approach in forming a powerful alliance in the maritime technology sector,” says David Schirm, CEO of Gabler Maschinenbau GmbH and Possehl PMB for corporate participation in SMEs. “Our customers can look forward to an expanded product portfolio and even more advanced technological solutions.”
Stefan Marx, founder and CEO of SubCtech GmbH, also sees the acquisition as a key milestone: “Joining the Possehl Group and Gabler Maschinenbau GmbH and becoming part of Gabler Group, allows us to bring our technologies to market faster and more broadly, especially through access to new markets and assure long stability for our customers worldwide.”
Strengthening northern Germany’s innovation ecosystem
Both companies will continue operations at their respective locations in Lübeck and Kiel. Together with Develogic GmbH in Hamburg and north.io GmbH in Kiel, the collaboration underscores Northern Germany’s role as a hub for maritime high technology and sustainable innovation.
About Gabler Maschinenbau GmbH
Gabler Maschinenbau GmbH is an internationally operating company and leader in hoistable mast systems, hydraulic supplies and tactical gateways for crewed and uncrewed submarines. With over 60 years of experience, Gabler stands for innovation, quality, and reliability.
About SubCtech GmbH
SubCtech GmbH develops and manufactures Li-Ion battery and converter systems, monitoring systems for climate research, and systems for the scientific, industrial and defence market.
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