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Alexander Demuth

Alexander Demuth


Alexander Demuth, Co-Head of A&M’s International Arbitration Group and leader of the German Disputes and Investigations practice, is a Managing Director based in Hamburg and Munich. He specializes in advising clients in arbitration, litigation and out-of-court settlement with a focus on post-merger and commercial disputes. 

He has almost twenty years’ experience as expert witness, in valuation services, business modeling and transaction services. For more than six years, Mr. Demuth has specialized in providing advice to tribunals and judges, to claimants and respondents, to buyers and sellers and to management and supervisory boards in disputes relating to mergers and acquisitions, shareholder matters or long-term contracts, e.g. supply agreements, license agreements or joint venture agreements.

He has been appointed as expert witness in numerous matters providing expert opinions on damages, accounting and valuation issues, business plan assumptions or prospective financial information.

His experience covers a broad range of sectors, including automotive, biotechnology, pharmaceutical, renewable energy, IT, retail, media, private equity, government, manufacturing, telecoms, chemicals and waste recycling, and involves assignments for German as well as international clients of all sizes, including stock-listed entities.

Prior to joining Alvarez & Marsal, he was a partner with a big four accounting firm, co-leading the Valuation & Business Modelling group. He was also part of the global product development group for Valuation & Business Modelling and the EMEIA trainer team.  

Mr. Demuth graduated with distinction in business administration and economics.

A German national, he is fluent in German and in English.

Mr. Demuth is a member of the German Chamber of Certified Public Accountants (Wirtschaftsprüferkammer), the American Institute of Certified Public Accountants (AICPA) and the AICPA Forensic and Valuation Services (FVS). He also passed the exams for the US Certified Public Accountant, being awarded the Illinois CPA Society Excel Award.

He is also a member of the German Institute for Arbitration (DIS), the Swiss Arbistration Association (ASA) and the Vienna International Arbitration Centre (VIAC). 

Mr. Demuth features in Who’s Who Legal Germany - Arbitration Expert Witnesses (described as a “top-notch” damages expert), in Who’s Who Legal Arbitration - Expert Witnesses (“smart, motivated and engaging”), in Who’s Who Legal Consulting Experts: Economic Consulting – Quantum of Damages (“astute and hardworking, and he as the ability to digest a huge amount of information quickly and effectively”) and in Who’s Who Legal Consulting Experts: Forensic & Litigation Consulting – Accountants (“sophisticated and yet down to earth in his dealings with clients”, recognized for his “reliable accounting”).