The Pharmacia Merger and After  

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Here is a timeline of major mergers and acquisitions after The Upjohn Company ceased to exist.

 

Pharmacia & Upjohn (P&U) - this was a merger of equals

  • Announced August 1995

  • Finalized October 1995

Pharmacia - P&U merged with Monsanto and formed a new corporation

  • Announced December 1999

  • Finalized April 2000

Pfizer - Pfizer bought Pharmacia

  • Announced July 2002

  • Finalized April 2003

Other

  • Upjohn Division announced by Pfizer July 2018

  • Upjohn Division finalized January 2019

  • Upjohn Division merger with Mylan announced July 2019

  • Upjohn Division merger with Mylan finalized November 2020

  • Upjohn-Mylan named Viatris November 2020



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