De Beers Tightens Sightholder Base Ahead of New Contract Cycle

Major Reduction in Sightholder List

In a significant recalibration of its rough diamond distribution strategy, De Beers is understood to have reduced its global sightholder base by nearly one-third, as it prepares to roll out a fresh cycle of supply contracts effective July 1, 2026.

List of Sightholders, some of the world’s leading diamantaires.

According to multiple industry sources, the miner has trimmed its roster from 69 sightholders to approximately 45, with more than 20 companies reportedly not renewed for the upcoming cycle. While the final composition of the list remains undisclosed, the move marks one of the most substantial reductions in recent decades and signals a clear strategic shift.

The restructuring comes at a time when the global diamond pipeline continues to navigate subdued demand and tightening margins. By consolidating supply among a smaller, more financially resilient group of buyers, De Beers appears to be prioritising consistency of offtake and long-term partnership stability over sheer volume distribution.

This transition is not entirely unexpected. The company had indicated as early as October 2024 that it would adopt a more selective approach through what it described as an “objective selection and allocation process.” The existing contracts, originally signed in 2021 and extended through June 2026, are now approaching closure, paving the way for a leaner and more curated client base.

Market observers also point to a gradual geographic realignment within the sightholder ecosystem. Traditional trading hubs such as New York and Israel are understood to have seen reduced representation, while India continues to strengthen its position, with at least one new entrant reportedly added from the country—reflecting the ongoing shift of cutting and manufacturing gravitation toward Asian centres.

The move underscores a broader transformation within De Beers’ operating philosophy. Under the leadership of CEO Al Cook, the company has consistently emphasised a “quality over quantity” approach—focusing on deeper, more integrated partnerships, including initiatives around polished diamond sales linked to Botswana-origin goods.

It is also worth noting that this restructuring unfolds against a backdrop of financial pressure on the business. Parent company Anglo American has undertaken multiple write-downs of De Beers’ valuation, including a reported $2.3 billion impairment earlier this year, highlighting the challenges facing the natural diamond segment.

Historically, De Beers’ sightholder system—introduced in 1934—has undergone periodic consolidation, with the most notable reduction occurring in 2001. From a peak of over 350 sightholders in the 1970s, the current shift toward a sub-50 client structure reflects a decisive move toward efficiency, resilience, and tighter supply discipline in an evolving market landscape.

An official confirmation of the final sightholder list is expected once the new contracts come into effect in July.