The Monsanto Chemical Company was founded on November 30th, 1901 by John F. Queeny in St. Louis, Missouri. Its industry is agribusiness and its headquarters is in Creve Coeur, Missouri. It merged with Pharmacia & Upjohn in 1995 but spun off into a separate company in 2000 that changed its industry from chemicals to agriculture.

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It had a Canadian subsidiary known as Monsanto (Canada), Ltd. and was based out of Vancouver, British Columbia.


Monsanto Chemical Works (1901-1933)

Monsanto Chemical Company (1933-1964)

Monsanto Company (1964-2000)


Monsanto Ag Company (2000-2000)

Monsanto Company (2000-)


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