Warth & Klein Grant Thornton AG
German professional services firm operating under the Grant Thornton brand, offering Audit & Assurance, Tax Advisory and Legal services.
Last updated September 16, 2026
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Overview
Warth & Klein Grant Thornton AG is a German professional services firm operating under the Grant Thornton brand. Its German-language website presents the firm's service lines as Audit & Assurance, Tax Advisory and Legal, alongside Advisory and Sustainability/ESG services. The tax practice describes serving companies, institutions and family offices, and states that clients can rely on decades of experience and know-how. The advisory practice covers areas such as Technology Consulting, Deal Advisory, Operational Excellence and Restructuring, and Valuation & Economic and Dispute Advisory. The firm also offers sustainability and ESG services aimed at the German Mittelstand, including ESG advisory and ESG assurance under the CSRD.
Products and positioning
Audit & Assurance
Service line listed on the firm's German website.
Tax Advisory
Tax services for companies, institutions and family offices, covering direct and indirect tax questions, transactions and tax audits.
Legal
Service line listed on the firm's German website.
Advisory
Advisory services including Technology Consulting, Deal Advisory, Operational Excellence and Restructuring, and Valuation & Economic and Dispute Advisory.
Sustainability and ESG services
ESG advisory and ESG assurance for the German Mittelstand, including services related to the Corporate Sustainability Reporting Directive (CSRD).
Sources5 sources
- 1Grant Thornton AGgrantthornton.de
- 2Steuerdienstleistungen und Beratung | Grant Thorntongrantthornton.de
- 3Advisory | Grant Thorntongrantthornton.de
- 4Nachhaltigkeitsberatung: Sustainability- und ESG-Services für den Mittelstand in Deutschland | Grant Thorntongrantthornton.de
- 5Warth & Klein Grant Thornton AGwikidata.org
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