Duygu Alkan, who is a co-founder of ADMD/Mavioglu & Alkan Law Office and an expert in contentious tax, leads the firm’s tax practice alongside fellow co-founder Orhan Yavuz Mavioglu, who has particular aptitude in tax issues relating to foreign investment. The team has a wealth of experience on the tax aspects of corporate reorganisations and M&A, transfer pricing, tax controversy and administrative litigation and tax compliance. Preparation for tax inspections and assistance with asset relocation, exit tax planning, and succession structures are other key areas of strength for the team.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Client satisfaction: NPS ®
Testimonials
Collated independently by Legal 500 research team.
- ‘ADMD stands out as a law firm capable of supporting large-scale and multi-sector investments with both precision and adaptability. What distinguishes their practice is the way they combine highly specialised legal knowledge with practical business insight.’
- ‘Tax issues can be daunting, but with Orhan Yavuz Mavioglu and Duygu Alkan, you can feel confident. Their expertise is remarkable, and their guidance is always precise and actionable.’
- ‘VAT refunds, and exemptions on new investments, require constant attention - ADMD guides with strategies that are clear and easy to implement. Barlas Guclu stands out for his intelligent, structured approach and ability to simplify complex tax issues and Asli Ensari, Ozlem Gumus, and Esra Guloglu add strength in dispute resolution, ensuring tax matters are handled with confidence and care.’
- ‘The lawyers at ADMD are at the very top of the tree. Across every level, they demonstrate remarkable depth of experience and unmatched competence.'
- 'What stands out most is their flexibility — they can move seamlessly from broad strategic issues to fine details, always accurate, always responsive.’
- ‘Working with ADMD feels like having a partner who knows both the investment world and the law inside out. They don’t just give legal answers, they show the bigger picture, anticipate risks, and keep things practical.’
Key clients
- Amdocs
- Bolt
- Chery
- Content Stream
- Dusit
- EnerSys
- Estun Automation
- Galahad
- Gurit
- Hell Energy
- IFS
- Jato
Work highlights
Advising Content Stream on the planned launch of its video-on-demand platform, including regulatory and tax structuring on cross-border VAT treatment, withholding tax requirements, and compliance with Turkey’s digital services taxation regime.
Advising Estun Automation, in relation to the Turkish subsidiary of Carl Closs, on its planned IPO on the Hong Kong Stock Exchange, including the development of a tailored tax compliance guideline to ensure IPO readiness and post-listing tax transparency and alignment.
Advising Hell Energy Drinks on tax compliance related to the restructuring of its Turkish operations, including managing tax filings, resolving pending tax disputes, and developing import-related tax efficiency strategies.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Duygu Alkan
Practice head
Duygu Alkan; Orhan Yavuz Mavioglu
Other key lawyers
Barlas Guclu; Asli Ensari; Ozlem Gumus; Esra Guloglu; Sevgi Durmus