Competition

We advise our clients on issues of UWG (Swiss competition law) and antitrust law and represent them before the Swiss Competition Commission COMCO as well as before the courts and administrative authorities.

Our expertise covers in particular the following activities:

  • Defending complex cases against authorities taking into account prevailing market conditions
  • Providing general advice, assessments and legal opinions on all aspects of competition and antitrust law to companies and industry associations, including advertising law aspects (Unfair competition law)
  • Support in contract negotiations as well as contract review with regard to possible antitrust violations in transaction agreements(exclusive or selective) distribution agreements, research and development agreements, franchise and licensing agreements, etc.
  • Strategic sourcing of suppliers using antitrust instruments
  • Advice and support for reporting mergers notifications to COMCO, including preparing the relevant data and ensuring the necessary contacts
  • Representation of companies in court cases involving competition and antitrust aspects
  • Enforcement of rights through civil courts (including follow-on actions for damages)
  • Implementation of antitrust compliance programs for companies and industry associations
Scherrer Frank

Frank
Scherrer

Partner

Tschudin Michael

Michael
Tschudin

Partner

Walti Beat

Beat
Walti

Partner

Roos Dominique

Dominique
Roos

Senior Associate

Langenegger Matthias

Matthias
Langenegger

Associate

Wyss Janica

Janica
Wyss

Associate

16.01.2026

Deal: Wenger Vieli advised the shareholders of TOFWERK on its sale to Bruker

09.01.2026

Deal: Wenger Vieli advised HOERBIGER on the acquisition of Physik Instrumente (PI)

26.08.2025

Deal: Wenger Vieli advised Frutiger on its participation in Blumer Lehmann

19.08.2025

Deal: Wenger Vieli acted as lead counsel to Verdane

31.03.2023

Deal: Shop Apotheke Europe and Galenica enter into stra­te­gic partnership

25.10.2022

Deal: Wenger Vieli advised CONET Tech­no­logies on the acquisition of emineo Group

02.09.2022

Deal: Wenger Vieli advised French impact fund STOA as lead investor on Series B financing round of candi solar

23.08.2022

Deal: Wenger Vieli advised Kontron AG on the sale of significant parts of Kontron's IT Services business

02.05.2022

Deal: F10 secures funding round and management buy-in

16.11.2021

Deal: Investment in Home Instead Group by Unigestion SA

21.09.2021

Deal: Merger of Bring! Labs AG with Profital

Publication

Switzerland Chapter, in: Merger Control by Global Legal Insights 2025/2026

Competition Tschudin Michael, Wyss Janica
03.09.2025
EN
Insights

Comprehensive Guide to Cartel Enforcement in Switzerland

Competition
 Tschudin Michael
04.09.2024
Publication

Switzerland Chapter, in: Cartels by Global Legal Insights 2024

Competition Tschudin Michael
17.07.2024
EN
Publication / Spotlights

Further tightening of the Cartel Act as of 1 January 2022

Competition Tschudin Michael, Roos Dominique
17.09.2021
DEEN
Publication

Pharmaceutical IP and competition law in Switzerland

Intellectual Property Law, Pharma and Health Care, Competition Scherrer Frank, Keller Claudia
20.04.2021
EN
Publication / Checklist

Kartellrechtliche Themen bei Mergers & Acquisitions

Mergers and Acquisitions, Competition Tschudin Michael, Roos Dominique
15.03.2021
DE
Publication / Checklist

Beschaffungswesen

Construction and Real Estate, Competition Tschudin Michael, Zanetti Nadine
23.09.2020
DE
Publication / Spotlights

New Procurement Law strengthens Competition on Quality

Construction and Real Estate, Competition Tschudin Michael, Zanetti Nadine
18.09.2020
DEEN
Publication

Exklusivitätsklauseln – zwischen zulässigem Schutz und kartellrechtlichen Schranken

Competition Tschudin Michael, Keller Claudia
26.08.2019
DE
Publication

Bau-Kartellrecht: wie die Dinge stehen

Competition Tschudin Michael
20.03.2019
DE
Publication / Guidelines

Merkblatt Kartellrecht im Vertragswesen

Competition Tschudin Michael
04.02.2019
DE
Publication / Guidelines

Merkblatt zu Dos and Don'ts im Kontakt mit Wettbewerbern

Competition Tschudin Michael, Scherrer Frank
04.02.2019
DE
Publication / Checklist

Checkliste zur Erkennung von kartellrechtlichen Risiken

Competition Tschudin Michael, Scherrer Frank
04.02.2019
DE
Publication

Das neue Geldspielgesetz - Erleichterungen für Gewinnspiele und Verlosungen

Technology and Media, Competition Keller Claudia
20.11.2018
DE
Publication

DIKE-Kommentar Kartellrecht, Kommentierung von Art. 50 bis 53 KG

Competition Tschudin Michael
03.09.2018
DE
Publication

Einkaufsgemeinschaften, in: Schweizerisches Kartellrecht in der Praxis

Competition Tschudin Michael
24.04.2018
DE
Publication

Das Instrument des Rahmenvertrags im Submissionsrecht

Erschienen in: ZBI 118/2017, S. 527 ff. Construction and Real Estate, Competition
02.10.2017
DE
Publication

Switzerland Chapter, in: The Public Competition Enforcement Review (9th Edition)

Published in: TLR - The Public Competition Enforcement Review, 2017. Competition Scherrer Frank, Tschudin Michael
03.07.2017
EN
Publication / Spotlights

Tightening Antitrust Law

Competition Scherrer Frank, Tschudin Michael
04.05.2017
DEEN
Publication

Mitwirkungspflicht an der eigenen Sanktionierung

Erschienen im AJP/PJA 3/2016, S. 323-334 Competition Tschudin Michael
23.03.2016
DE
Publication

Business in Switzerland - Anti-Trust Regulations

Swiss-American Chamber of Commerce, 12/2015 Competition Tschudin Michael
09.12.2015
EN
Publication

Wettbewerbskommission und Arbeitsgemeinschaften

Erschienen in Schweizer BauJournal 4/2015 Competition Tschudin Michael
05.10.2015
DE
Publication / Referate

Speech: Umfang und Grenzen der Mitwirkungspflichten und –rechte der Parteien im Kartellverfahren

Tagung der Studienvereinigung Kartellrecht am 12. Juni 2015 in Bern Competition Tschudin Michael
24.06.2015
DE
Publication

Glauben, Wissen, Zweifeln - Über das Beweismass im Kartellrecht

Erschienen in: AJP 10/2014, S. 1333-1345 Competition Tschudin Michael
01.10.2014
DE
Publication

Social Media Interview mit Claudia Keller

Social Media für Unternehmen und Behörden Interview und Buchempfehlungen lic. iur. Claudia Keller mit Schulthess Verlag, Zürich.Erschienen in Recht aktuell; www.schulthess.com Technology and Media, Competition Keller Claudia
10.07.2013
DE
Publication

Was versteckt sich im Maul des geschenkten Gauls? Ein paar Gedanken zu AGB von Online Plattformen

Erschienen auf www.mcschindler.com Technology and Media, Competition Keller Claudia
10.07.2013
DE
Publication

Die verhandelte Strafe - Einvernehmliche Regelung neben kartellrechtlicher Sanktion

Erschienen in: AJP 7/2013, S. 1017-1028 Competition Tschudin Michael
01.07.2013
DE
Publication

Diskriminierung als kartellrechtlicher Aufgreiftatbestand

Erschienen in: Jusletter 25. März 2013, S. 1-12 Competition Tschudin Michael
25.03.2013
DE
Publication / Spotlights

Erhöhte Anforderungen an AGB mit Konsumenten

Banks and Financial Service Providers, Corporate and Commercial Law, Intellectual Property Law, Technology and Media, Competition Hünerwadel Andreas
14.05.2012
DE
Publication / Spotlights

Informationsaustausch zwischen Konkurrenten – eine Gratwanderung

Competition Scherrer Frank, Tschudin Michael
06.03.2012
DE
Publication

Rabatte als Missbrauch einer marktbeherrschenden Stellung gemäss Art. 7 KG

Diss. Fribourg, Basel 2011 Competition Tschudin Michael
03.01.2011
DE
The Legal 500Leaders League

We highly value their practical approach, which blends legal expertise with an insightful grasp of regulatory dynamics, enabling them to provide advice that is both strategically sound and pragmatic.

Client Testimonial, The Legal 500, 2025/2026

The individuals we work with standout due to their down-to-earth attitude, extensive experience in competition law, and a deep understanding not just of the legal landscape but also of the behaviors, goals, and biases of competition authorities.

Client Testimonial, The Legal 500, 2025/2026

This business-oriented mindset and deep understanding of our specific needs are clear strengths that set this team apart from other firms.

Client Testimonial, The Legal 500, 2025/2026

The team stands out due to his exceptional ability to deeply understand our business practices and company goals, not just the legal aspects. They go beyond simply evaluating the legal situation by immersing themselves in the strategic and operational needs of our business.

Client Testimonial, The Legal 500, 2025/2026

Wenger Vieli’s team is particularly known for its expertise in abuse of dominance cases, in particular at the interface with data protection (i.e. the use of data by companies with market dominance). Furthermore, the firm in general comes a across as being one of the “modern” and innovative commercial law firms on the Swiss market.

Client Testimonial, The Legal 500, 2024/2025

Wenger Vieli has an outstanding team in competition law, headed by Michael Tschudin. They are extremely quick and lean and at the same time very profound in their knowledge of all aspects of competition law. Working with them gives clients a good feeling because the work products are excellent and the collaboration is fun.

Client Testimonial, The Legal 500, 2022/2023

Wenger Vieli has an excellent, well-established antitrust practice, mainly driven by Michael Tschudin.

Client Testimonial, The Legal 500, 2022/2023

The level of service has been exceptional. Experience, expertise, and an ability to produce results under pressure.

Client Testimonial, The Legal 500, 2022/2023