Deals & Cases
Wyeth Pharmaceuticals AG merged into Pfizer AG
Pfizer Inc., the world's largest research-based pharmaceutical company, acquired Wyeth in a cash and stock merger effective October 15, 2009. In this context, Pfizer successfully completed the Swiss integration of Wyeth Pharmaceuticals AG into Pfizer AG by merger as of January 25, 2010. Lenz & Staehelin advised Pfizer Inc. with respect to the integration of the Swiss companies. The team was comprised of Rudolf Tschäni and Sandra Zweifel.