Oliver Arter

Andrea Meier is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation. Andrea, who practices law in Zürich, Switzerland, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andrea is held by other top lawyers in the same geographic and legal practice area.

Alain Raemy is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Alain, who practices law in Zürich, Switzerland, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Alain is held by other top lawyers in the same geographic and legal practice area.

Admitted to the Bar since 1978 Areas of practice: International banking law, antitrust law, corporate law, IT, internet and media law, Professor of Civil, Business and European Law at the University of Zurich, Board Member of the European Institute in Zurich, Co-Director of the Center for Information and Technology, Society and Law, Zurich, Co-Director of the Center for Financial Market Regulation, President of the Appeal Commission of the Swiss Exchange SWX, Visiting Professor at the Univers...

Michael Isler is a partner and member of the management board in the product groups Intellectual Property, Information Technology and Data Protection. He regularly advises in complex outsourcing, technology transfer and platform projects from the conceptual and negotiation phase to dispute settlement. He further enjoys a vast experience in copyright, trademark and patent law. A particular focus of his work is dedicated to the life sciences and health sector. Michael Isler regularly publishes ...

Hans Rudolf Trüeb is a partner of Walder Wyss. He is the co-head of the Regulated Markets, Competition, Technology & IP team, together with David Vasella. He advises Swiss and international clients as well as public entities in corporate and technology-related transactions and with regard to compliance and governance issues. Inter alia, he handles technology transfer, licensing, distribution, joint venture and outsourcing projects as well as corporate transactions. He is often retain...

Florian Gunz Niedermann is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. Florian, who practices law in Zürich, Switzerland, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Florian is held by other top lawyers in the same geographic and legal practice area.

Peter Straub is counsel in the Litigation & Arbitration Team. He is specialised in complex international commercial disputes and represents parties in both state court litigations and before arbitral panels. His main areas are disputes stemming from telecommunications, pharmaceutical products, construction, joint ventures, commodities trading, high end consumer goods, shareholders' positions, post M&A, etc. Peter Straub is sitting as an arbitrator in international arbitrations (ICC, S...

Ramona Wyss is a top attorney recognized by Best Lawyers in the practice area(s) of Public Law. Ramona, who practices law in Zürich, Switzerland, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ramona is held by other top lawyers in the same geographic and legal practice area.

Louise Lutz Sciamanna is a top attorney recognized by Best Lawyers in the practice area(s) of Wealth Management Practice. Louise Lutz, who practices law in Zürich, Switzerland, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Louise Lutz is held by other top lawyers in the same geographic and legal practice area.

Luc Defferrard, partner with Walder Wyss since 2001, has been active in the finance and legal industry for many years. He mainly advises clients in domestic and cross-border mergers & acquisitions, financing, restructuring as well as in real estate and capital market. Luc Defferrard particularly focuses on private equity and venture capital transactions. He is regularly recommended by Chambers, Legal500 and IFLR1000. Chambers Europe describes him as "always available" and "very strong neg...