1963 - Bayer Pakistan (Pvt.) Ltd. incorporated in Pakistan on 25 June, 1963 as a private company registered in Karachi..
1964 - A plot of an area of 12,000 sq.meters was acquired by Bayer in S.I.T.E. Karachi and established its factory in 1964 comprising of solid, liquid, cream and injectable departments.
1986 - In addition to the pharmaceuticals wing, the PH-Agro Factory was also established in 1986 on an area of 625 sq.meters in the vicinity of the pharmaceuticals Factory..
1989 - The production transferred for third-party manufacturing to a national company named M/s Saitex Pharmaceuticals (Pvt) Ltd.
1995 - Bayer AG decided to re-establish new manufacturing facilities at C-21, S.I.T.E. Karachi meeting GMP requirements.
2002 - Bayer group acquired the worldwide crop protection business of Aventis and subsequently the name of the local Aventis CropScience Company was changed to Bayer CropScience (Pvt) Limited heaquartered in Korangi, Karachi.
2006 - Bayer AG acquired Schering AG in September 2006 including global operations. As a result, local ex-Schering Company, namely Medipharm(Private) Limited having factory at Kotlakhpath, Lahore came under the management control of Bayer Pakistan (Pvt.) Ltd.
2012 - Legal entity integration of Bayer CropScience (Private) Limited with Bayer Pakistan (Private) Limited.