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Risk Advisory
Security for your business
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Digital advisory & IT consulting
Mastering digitalisation together
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Operational Advisory
Solidifying and supporting transformation
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Deal Advisory
We’ll advise you on national and international transactions
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Valuation & economic and dispute advisory
We’ll value your business fairly and realistically
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Financial Advisory
Optimising financial structures
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Tax for businesses
Because your business – national or international – deserves better tax advice.
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Tax for financial institutions
Financial services tax – for banks, asset managers and insurance companies
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Employment law
Representation for businesses
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Commercial & distribution
Making purchasing and distribution legally water-tight.
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Inheritance and succession
Don’t leave the future to chance.
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Financial Services | Legal
Your Growth, Our Commitment.
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Business legal
Doing business successfully by optimally structuring companies
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Real estate law
We cover everything on the real estate sector, the hotel industry, and the law governing construction and architects, condominium ownership, and letting and renting.
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IT, IP and data protection
IT security and digital innovations
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Mergers & acquisitions (M&A)
Your one-stop service provider focusing on M&A transactions
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Sustainability strategy
Laying the cornerstone for sustainability.
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Sustainability management
Managing the change to sustainability.
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Sustainability reporting
Communicating sustainability performance and ensuring compliance.
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Sustainable finance
Integrating sustainability into investment decisions.
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International business
Our country expertise
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Entering the German market
Your reliable partners.
Our history
Our history
Since 1958, we have been supporting our clients in realizing their business objectives. We are particularly familiar with the challenges of dynamic growth for the German Mittelstand as we went down this road ourselves in our 60 years of history. We started out as an owner-managed national audit firm and have become an international stock corporation with over 130 partners.
04 May 1958: Foundation of Warth & Klein GmbH by Karl Warth, Günter Klein and Werner Klein in Düsseldorf.
1991: Inauguration of the Company’s office in Leipzig after the German reunification
1992: Inauguration of the Company’s office in Dresden
2000: The Company joins the Grant Thornton International Ldt. network
2001: Inauguration of the Company’s office in Frankfurt am Main
2007: Inauguration of the Company’s office in Stuttgart
2010: Conversion into a stock corporation
2011: Warth & Klein becomes sole German member firm of the Grant Thornton International network and changed its name to Warth & Klein Grant Thornton AG Wirtschaftsprüfungsgesellschaft as of 01 July 2011
2011: New partners joined Warth & Klein Grant Thornton and inauguration of the Company’s offices in Hamburg and Munich
2015: Inauguration of the new offices at Johannstrasse, Düsseldorf
2017: Inauguration of the Company’s office in Berlin
2018: Cooperation with Hanse Consulting Group (until 2023)
2018: Merger with Nachmann Rechtsanwälte in Munich
2019: Merger with Trinavis, Berlin becomes the second largest location after Düsseldorf
2020: Merger with the locations of PKF Fasselt Schlage in Hamburg and Rostock. New offices in Rostock.
2022: Relocation of Frankfurt offices to the 18th/19th floor in the Senckenberg Tower
2022: As of 01 March 2022, the Company’s name was changed to Grant Thornton AG Wirtschaftsprüfungsgesellschaft
Who we are
Our history
From an owner-managed national audit firm to an international stock corporation with over 130 partners.
Our responsibility
Meaningful success is achieved when we work together for the benefit of all those we serve.
