Rupert Esmond Ian Baring

Mantle Diamonds Ltd. explores and develops kimberlite and diamond products. It engages in diamond exploration and development activities in Canada, Finland, Democratic Republic of the Congo, Liberia, Mali, Zimbabwe, the Russian Federation, and Lesotho. The company was founded by Laster Kemp and Rupert Esmond Ian Baring in September 2005 and is headquartered in London, the United Kingdom.

De Beers Canada, Inc. operates a diamond extraction and processing firm. It extracts every category of diamond deposit: kimberlite dykes, pipes, alluvial, and fluvial deposits. The company was founded in 1888 and is headquartered in Toronto, Canada.

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.

Kimberley Diamonds Ltd. operates as a mineral resources mining and exploration company. The firm also owns and operates the Ellendale Diamond project. The company was founded on May 5, 2011 by Miles Kennedy and is headquartered in Sydney, Australia.

Challenger Acquisitions Ltd. is a holding company specializes in design and engineering of giant observation wheels and structures. It operates through the following segments: Corporate Center, Engineering, and Investment. The Corporate Center segment administers and manages the Group and identifies target companies or businesses for possible acquisitions in the Giant Observation Wheel industry. The Engineering segment which was compromised by the acquired Starneth design and engineering business. The Investment segment which compromises all investments the group holds in Giant Observation Wheels globally. The company was founded on November 24, 2014 and is headquartered in Saint Peter Port, United Kingdom.