J Grennan & Sons is a family-owned Agri-trading business which has been involved in farming for many generations and in agri-trading since 1878. Their core business is the manufacturing and distribution, at wholesale and retail level of animal feeds, farm fertilisers and agricultural seeds.

The business is also involved in retailing and wholesaling of agrochemicals, farm hardware and farm plastics. The business is also a shareholder in Target Fertilisers.