Major companies with works in Dronfield include Henry Boot PLC, a property development and construction company (the divisions Henry Boot Construction Ltd and Banner Plant Ltd have regional offices in the town), Padley & Venables Ltd, manufacturers of tools for use in drilling, tunnelling, mining, quarrying and construction/demolition, Land Instruments International, international designer and manufacturer of industrial and environmental monitoring instruments (in 2006 this was acquired by AMETEK Inc), and Gunstones Bakery, which was founded in Sheffield in 1862, moved to Dronfield in 1950, taken over by Northern Foods in 1971 and acquired by 2 Sisters in 2011; in 2013 it employed more than 1,400 people.