An international team of CMS Switzerland and Germany under the lead of Stefan Brunnschweiler and Samuel Gang provided comprehensive advice to Integrity360 on all legal aspects regarding the acquisition of leading European PCI QSA (Payment Card Industry Qualified Security Assessor) and cyber security services company Adsigo.
CMS advised on the acquisition of Adsigo by Integrity360

Key contacts
Adsigo is a highly respected and well-established consultancy founded in 2013, and serves customers in Germany, Austria and Switzerland. It operates out of Stuttgart, Hamburg and Zurich from which it provides services to a wide range of financial, industrial, and services organisations. Adsigo has a leading position in PCI compliance and operates as one of the leading Qualified Security Assessor ("QSA") organisations in Europe having completed over 1,500 assessments. Adsigo will complement Integrity360's existing substantial PCI practice which operates as the No. 1 most chosen QSA organisation by Visa and Mastercard service provider organisations across Europe. Integrity360 has also been a proud member of the PCI GEAR (Global Executive Assessor Roundtable) since 2018 helping to refine and define PCI standards for the benefit of the industry. Adsigo will also compliment Integrity360's existing regulatory and cyber framework services capability including ISO27001, cyber security strategy, and third-party risk management.
Integrity360 is Europe's leading cyber security and PCI specialist, with offices across the UK and Ireland, Bulgaria, Italy, Sweden, Spain, Lithuania, Ukraine, Africa, and the Caribbean. The company operates five Security Operations Centres (SOCs) in Dublin, Sofia, Stockholm, Naples, and Cape Town. With over 550 employees and an expert team of over 400 dedicated cyber security professionals, Integrity360 offers a full suite of professional, support, and managed security services. These services cover every aspect of cyber risk management, from identification and prevention to detection, response, and recovery. Whether working independently or alongside an organisation's internal teams, Integrity360 enhances the security posture of mid-market and enterprise clients across sectors such as financial services, insurance, government, healthcare, retail, telecoms, and utilities.
The parties have agreed not to disclose the purchase price of the transaction.
CMS Switzerland
- Stefan Brunnschweiler, LL.M., Managing Partner, Head Corporate/M&A
- Samuel Felix Gang, LL.M., Senior Associate, Corporate/M&A
- Anna Mast, Associate, Corporate/M&A
- Mark Cagienard, LL.M., Partner, Tax
CMS Germany
- Dr Hendrik Hirsch, Partner, Corporate/M&A
- Dr Berrit Roth-Mingram, M.A., Counsel, Corporate/M&A
- Dr Till Alexander von Poser und Groß Naedlitz, Associate, Corporate/M&A
- Dr Boris Alles, Partner, Employment
- Dela Herr, Senior Associate, Employment
- Dr Felix Glocker, Senior Associate, TMC
- Katharina Hirzle, Senior Associate, TMC