La préparation d'une offre publique d'acquisition

Published: 10 October 2002

Depuis 1998, la loi fédérale sur les bourses et le commerce des valeurs mobilières offre un cadre légal aux offres publiques d'acquisitions (OPA) en Suisse. En assurant une plus grande égalité des armes entre offrants et sociétés visées en cas d'OPA, cette loi a contribué à changer les relations qui existaient jusqualors entre actionnaires et administrateurs de sociétés publiques dans notre pays. Cet ouvrage donne un apperçu des clauses les plus fréquemment utilisées dans les documents publiés lors d'une OPA. Destiné aux praticiens, il prend la forme d'un prospectus d'offre annoté. Il reproduit et commente des extraits de documents publiés lors de transactions passées, en les plaçant dans le contexte des dispositions légales pertinentes, ainsi que de la pratique développée par la COPA, la CFB, et le Tribunal fédéral. Il aborde aussi des questions stratégiques et tactiques, comme le choix des conditions de loffre et la coordination du calendrier de l'OPA et d'une éventuelle assenmblée générale de la société visé.

Insights

Insights 06.03.2026

Swiss sanctions against Russia – Further alignment with the EU – Implementation of the 19th Sanctions Package

Swiss sanctions against Russia – Further alignment with the EU –…

<p>In a continued effort to align with European Union ("<strong>EU</strong>") sanctions, on 25 February 2026, the Swiss Federal Council adopted additional measures transposing core elements of the EU's 19th sanctions package (adopted at EU level on 23 October 2025). The Swiss amendments entered into force on 26 February 2026, with certain measures phased in later in spring 2026.</p> <p>The revision notably (i) introduces a new crypto-asset transaction prohibition tied to a dedicated annex, (ii) adds a new sanctions pillar targeting Russian special economic, innovation and preferential zones, and (iii) expands the catalogue of prohibited services and enabling technologies (including AI-model access, high-performance computing and quantum computing).</p>

Insights 04.03.2026

MBaer Merchant Bank AG: FinCEN Section 311 action and FINMA liquidation – Important compliance lessons for Swiss financial institutions

MBaer Merchant Bank AG: FinCEN Section 311 action and FINMA liquidation –…

<p>In February 2026, U.S. and Swiss authorities took consecutive measures affecting MBaer Merchant Bank AG, a Zurich-based bank. The U.S. Financial Crimes Enforcement Network issued a notice under Section 311 of the USA PATRIOT Act proposing special measure five, which, if adopted, would have effectively severed MBaer's access to the U.S. financial system via correspondent and payable-through restrictions.</p> <p>In parallel, FINMA announced supervisory measures culminating in the license withdrawal and liquidation of that bank, including procedural developments before the Swiss Federal Administrative Court.</p> <p>Taken together, these developments provide a highly practical case study for Swiss institutions on how AML control and sanctions compliance weaknesses, high-risk client exposure and cross-border market-access dependencies may converge and escalate quickly. The case also illustrates the interplay between foreign regulatory action and Swiss supervisory proceedings.</p>

SEE ALL