Transaction - Tessarek Security Systems

Tessarek Security Systems in Germany becomes part of Prosero Security – GENTIUM advises shareholders on the sale process

Sector / Industry
Security / Perimeter Protection

Transaction Type
Company Sale

Gentium Role
Sell-side Advisor

Closing Date
July 2026

We are pleased to announce that GENTIUM GmbH has advised realkapital Mittelstand KGaA and Tim Karcher (the “Shareholders”) of Tessarek Security Systems GmbH (“Tessarek”), based in Braunschweig, as the exclusive M&A sell-side advisor on the sale of 100% of the shares to the Prosero Security Group (“Prosero”), a Swedish security group in the Valedo Partners portfolio.

Tessarek is an established specialist for integrated security solutions with a strong regional presence and a trusted partner for commercial, industrial, and critical infrastructure customers in Northern Germany. The company offers comprehensive solutions in the field of physical and technical security, including perimeter protection, access control, automation, installation, commissioning, as well as service and maintenance.

Prosero Security is a leading provider of technical security solutions in Northern Europe with a strong local presence and more than 2,000 employees at over 200 locations. Prosero serves approximately 150,000 customers in Sweden, Norway, Denmark, Finland, Germany, and Switzerland.

“Tessarek Security Systems is a well-managed company with a strong market position and high technical expertise. Given the increasing requirements for the protection of critical infrastructure, industrial plants, and other socially important facilities, we see a growing demand for the type of solutions that Tessarek Security Systems offers. Through this acquisition, we gain another specialist, which strengthens our overall offering and expertise in an area that is becoming increasingly important for our customers,” says Gerrit Fleischer, Country Manager DACH at Prosero Security.

Tessarek Security Systems is led by Managing Director Tim Karcher, who will continue to lead the company together with his employees following the acquisition. “We built Tessarek Security Systems with a focus on quality, long-term customer relationships, and top technical expertise. By joining Prosero, we now gain access to a larger network, more development opportunities, and a solid platform for further growth. At the same time, we can continue to work closely with our customers and lead our business with the entrepreneurial spirit that has defined us since our founding,” says Tim Karcher, Managing Director of Tessarek Security Systems.

Nikolaus Lange, General Partner of realkapital Mittelstand, adds: “We are very pleased to have found the right strategic partner for Tessarek Security Systems in Prosero. The company has developed excellently over the years, and we are convinced that as part of the Prosero Group, Tessarek is ideally positioned to continue its successful growth path while preserving the entrepreneurial culture that has made the company so successful.”

The transaction represents another successful step in the ongoing consolidation of the security systems market. GENTIUM sees strong structural dynamics in this sector, driven by rising security requirements, a growing demand for integrated technical solutions, and the increasing importance of protecting critical infrastructure.

Christian Ståhl, Managing Partner of GENTIUM GmbH, comments: “We are very pleased to have advised the shareholders of Tessarek Security Systems on this important transaction. Tessarek is an excellent example of a highly specialized, entrepreneurially driven company in a structurally attractive market. We are currently observing significant M&A activity and strong investor interest in the security sector, particularly in the areas of technical security, perimeter protection, and critical infrastructure.”

Oleksandr Molchanov, Partner at GENTIUM GmbH, adds: “We would like to thank the sellers – realkapital and Tim Karcher – for the trust they placed in us throughout the entire process. We also thank Prosero and the entire advisory team for the highly professional, efficient, and constructive cooperation. The process was characterized by clear strategic logic, strong mutual commitment, and very effective execution by all parties involved.”

The sellers were supported by GENTIUM GmbH as the exclusive M&A sell-side advisor.

“GENTIUM convinced us from the start with a structured and professionally managed process. The careful preparation, good market knowledge, and reliable execution contributed to achieving a very good result. We appreciated the team’s commitment and perceived GENTIUM as a trustworthy partner throughout the transaction.”
Nikolaus Lange, General Partner, realkapital Mittelstand KGaA