 Moodys Investors Service Moodys assigned Baa3 senior unsecured ratings to the notes offering of Upjohn Finance B.V. Upjohn. Upjohn is the mature branded business of Pfizer, Inc. Pfizer that will be combining with Mylan N.V. Mylan, Baa3 stable through a Reverse Morris Trust RMT transaction. Upjohn will be renamed Viatris, once the RMT closes. 