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Portrait ofClemens Grossmayer

Clemens Grossmayer


CMS Reich-Rohrwig Hainz
Rechtsanwälte GmbH
Gauermanngasse 2
1010 Vienna
Languages English, German

Clemens Grossmayer is a partner of CMS and a member of the transaction team. He is an expert for corporate law/M&A. He joined CMS in Vienna in 2005. 

Clemens advises clients in national and international M&A transaction and the formation of joint ventures. He has significant experience in the structuring and implementing complex cross border reorganizations and carve-out transactions. He further advises on general corporate and corporate governance issues. 
Clemens Grossmayer convenes a lecture course on the negotiation of M&A contracts both at the Faculty of Law of the University of Vienna and at the Vienna University of Business Administration. 
Clemens Grossmayer regularly publishes on corporate and company law topics. His doctoral thesis on a topic related to reorganization law was awarded the 2010 Walther Kastner Prize of the Association of Austrian Banks & Bankers.


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"David Kohl and Clemens Grossmayer have excellent knowledge and a very good relationship. Highly recommended."

The Legal 500, 2023

"Clemens Grossmayer is very pragmatic, commercial and goal-oriented, he is a calm negotiator and also ensures that every process runs smoothly and efficiently, we were always happy to have him on our side."

The Legal 500, 2022

Memberships & Roles

  • Austrian Bar Association
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Awards & Rankings

  • Clemens Grossmayer was nominated as Acritas Star in 2021.
  • Clemens Grossmayer is recommended by German JUVE in the field of Corporate/M&A. JUVE 2014/2015
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  • Grossmayer/Hanslik, Big Deal? M&A-Verträge richtig verhandeln! (LexisNexis, 2013).
  • Einlagenrückgewähr – drei aktuelle Entscheidungen, ecolex 2013, 951.
  • Gläubigerschutz bei Abspaltungen (Neuer Wissenschaftlicher Verlag, 2010).
  • Kapitalerhaltung bei der GmbH & Co KG, ecolex 2008, 1023.
  • Fida/Graessner/Grossmayer, Gesellschaftsformen im österreichischen Recht, in International Bureau of Fiscal
  • Documentation/Deutsches Steuerberaterinstitut e.V./Fachinstitut des Deutschen Steuerberaterverbandes e.V. (Hrsg), Steuerberater Handbuch Europa (2008).
  • Fida/Grossmayer, Grenzüberschreitende Verschmelzungen von Kapitalgesellschaften nach dem EU-VerschG – Ein Überblick in Fragen und Antworten, SWK 12/2008, W 75.
  • Grossmayer/Hanslik, MAC-Klauseln in Unternehmenskaufverträgen, ecolex 2007, 829.
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  • 2009 – Dr. iur., Law, University of Vienna
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Business Breakfast | Insolvenz & Restrukturierung
Business Breakfast
CMS advises Siemens Austria on sale of Austrian facility management business
Apleona acquires Siemens Ge­bäu­de­m­an­age­ment und -Services (SGS). CMS Vienna provides comprehensive legal support to Siemens Aus­tria.   Siemens Austria has agreed to sell Siemens Ge­bäu­de­m­an­age­ment & -Services G.m.b.H. (SGS) to Apleona. The closing of the transaction is expected in the third quarter of the financial year and is subject to customary antitrust approvals. Both companies have maintained a good and close relationship for years. SGS will be further strengthened by joining forces with Apleona, resulting in an expanded and improved range of ser­vices.   Siemens Austria is being legally advised and supported by the Viennese law firm CMS Reich-Rohrwig Hainz under the leadership of Alexander Rakosi, partner in the Corporate/M&A department. The core CMS team further consists of M&A experts Florian Mayer, Marie-Christine Lidl, Anna Hiegelsperger and Matthias Emich. Sibylle Novak and Alexander Hiermann deal with tax law issues, Andrea Potz, and Jens Winter assist on labour law topics and Bernt Elsner and Marlene Wim­mer-Nistel­ber­ger advise on competition law. Additional support during the course of the transaction came from Daniela Karollus-Bruner, Robert Keisler, Dieter Zandler and Clemens Gross­may­er.   Al­ex­an­der Rakosi is pleased with the successful deal signing: “We are proud to be able to support Siemens on this project with a cross-de­part­ment­al team and contribute to further entrenching Siemens as a focused technology company in Aus­tria.”   Siemens Ge­bäu­de­m­an­age­ment & -Services ¬G.m.b.H., based in Vienna, is a successful man­u­fac­turer-in­de­pend­ent full-service provider in the technical building¬ management¬ sector with around 260 employees. Its customers include institutions from the health care, culture and education, trade and logistics sectors, as well as renowned commercial enterprises. In the last business year, it achieved a turnover of around 75 million euros.
CMS Reich-Rohrwig Hainz advises private equity investor Finexx on the acquisition...
The international business law firm CMS has advised the German investment company Finexx on its acquisition of Volpini Verpackungen GmbH Austria. While the Finexx (founded in 2013) was able to increase...
CMS advises CA Immo on the cross-border sale of the Zagrebtower
CMS Vienna and CMS Zagreb demonstrate CMS’s special expertise in cross-border transactions while advising CA Immo on the sale of the Zagrebtower to the Austrian real estate company S IMMO AG. Partner...
Stabilisation and restructuring law in Austria
1. Which financial (not tax or labour) short-term compensation schemes for immediate losses due to social distancing measures have been implemented? For which industries/sizes of business? The first...
Virtual general and shareholders' meetings, virtual supervisory board meetings...
The COVID-19 pandemic is causing economic turmoil for many companies. Are GmbH shareholders and shareholders still entitled to a distribution of the balance sheet profit if business slumps in the new...
Corporate COVID-19 Act
The measures to contain COVID-19 (keywords: ban on meetings and travel restrictions) often make it impossible for shareholders and board members to meet physically. The legislator is now reacting to this...
Lower Austria model for broadband expansion ready to go: Eisenberger &...
To ensure that Lower Austria can supply its rural regions with a fast and future-proof fibre-to-the-home ("FTTH") optical fibre network, Nieder­ös­ter­reichis­che Breit­band-Hold­ing and Allianz Capital Partners...
Successfully completed bidding process: CMS supports Nieder­ös­ter­reichis­che...
Broadband for everyone! This is the motto of Lower Austria’s efforts to build a broadband network covering nearly the entire state. The next step to this goal is a 300-million-euro investment package...
CMS advises capiton/CymbiQ Group on the acquisition of anovis it-services...
CMS advises capiton/CymbiQ Group on the acquisition of anovis it-services and trading gmbh CymbiQ Group AG, a portfolio company of the German private equity investor capiton, has acquired anovis it-services...
CMS Advises in Austria’s Largest Private Equity Transaction in 2017:
Following the transaction closing on 12 September 2017, TowerBrook Capital Partners is the new owner of Salzburg-based Schweighofer Fiber GmbH. While the financial terms were not disclosed, the transaction...
CMS assists XING AG in purchasing Prescreen GmbH
XING AG has acquired Prescreen GmbH for 17 million euros (purchase exercise price). Prescreen operates the application management system of the same name. The purchase exercise price for the software...