Grant J. Stubbs

I. Hennig & Co. Ltd. operates as diamond broking company. The firm's primary business is to help its clients procure rough diamonds and develop their business. It offers consulting services to governments and industry related bodies including participants throughout the diamond pipeline from governments, miners and manufacturers, to jewelers and retailers. The company was founded by Isidor Hennig in 1890 and is headquartered in London, the United Kingdom.

Stockdale Street Ltd (Stockdale Street) is a private equity subsidiary of Brenthurst Ltd. founded in 2001. The firm is headquartered in London, United Kingdom.

Harttron Ltd. provides lighting installation contracting services. It offers design, construction, maintenance and asset management services. The company is headquartered in Cheshire, the United Kingdom.