The Diamond Trading Company (DTC) is the distribution arm of De Beers. It sorts, values and sells a significant proportion of the world’s rough (uncut) diamonds. By combining supplies of rough diamonds from a number of sources, the DTC offers its clients a wide-ranging and consistent supply with long-term commitment. Competition between Sightholders, for rough diamonds is rigorous and diamantaires have to present the best case possible to ensure eligibility for DTC supply. 

Hennig offers the DTC a service by disseminating information to DTC clients and offering market intelligence and client-feedback to the DTC on their initiatives. 

Hennig’s value to the DTC is illustrated by the numerous occasions on which the DTC consults with us on new initiatives, implementation of new polices and manner in which to impart critical information. Hennig’s role is to represent our clients’ collective interest in these consultations. Through our work together, a symbiosis between our two companies has developed which enhances our ability to advocate on behalf of our clients, to the DTC. 

Since 2007, the marketing function of DTC has become a separate, standalone entity. Its main role is to promote consumer confidence, primarily through Forevermark, the world's leading diamond brand, which was launched in Hong Kong, China and Macau in 2008, with Japan, Taiwan, India and South Africa following in 2009.