Gwynn Galloway Thomson

DTZ Holdings Plc operates as an investment holding company with interest in property consulting and investment services. The company was founded on January 12, 1987 and is headquartered in London, the United Kingdom.

Sigma Capital Group Plc operates as a holding company. The firm engages in the provision of property asset management to residential and commercial properties. It operates through the following segments: Regeneration, Managed Property, Owned PRS Property, Venture Capital and Holding Company. The company was founded by Graham Fleming Barnet and Neil David Crabb in December 1996 and is headquartered in Edinburgh, the United Kingdom.

Sigma Technology Management is a wholly-owned venture capital subsidiary of Sigma Capital Group Plc founded in 1997 by Graham Fleming Barnet and Neil David Crabb. The firm is headquartered in London.

Cushman & Wakefield Debenham Tie Leung Ltd. operates as an international property advisers. The company was founded on October 16, 1992 and is headquartered in London, the United Kingdom.

The Royal Institution of Chartered Surveyors provides professional excellence in its membership through education, accreditation, publication, and other services. The non-profit company is based in London, UK, and has a global presence of subsidiaries in several regions. Justin Young has been the CEO of the British company since 2023.

Sigma Inpartnership Ltd. conducts urban regeneration works including education, health, housing, and commercial property. The company was founded in 2001 and is headquartered in Edinburgh, the United Kingdom.

Part of Sigma Capital Group Ltd., Sigma PRS Management Ltd. is a British company that provides real estate services. The private company is based in Manchester, UK. Sigma PRS Management was founded in 2017.