A&O Shearman
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The expertise of the practice group at A&O Shearman spans transactional support for financial and M&A matters, fund formation, criminal tax investigations, and real estate investment and financing. Mathieu Vignon and Guillaume Valois share leadership of the team. Vignon focuses on the tax aspects of financial transactions, asset management, and capital markets work. Valois, for his part, specialises in the tax structuring of LBO, M&A, and real estate transactions. Charles del Valle is an additional key contact for the tax structuring of LBO transactions and infrastructure projects.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Extensive knowledge of the market and the practice.’
- ‘Responsiveness and knowledge of our processes/operating methods.’
Key clients
- 123 Management
- Advent
Work highlights
Advised Sia Partners on a minority investment of up to €250m from funds managed by Blackstone.


