Vitol Group and TotalEnergies SE are hoovering up key North Sea crude supplies, part of the biggest spate of activity in almost two decades for barrels that help set global oil prices.

Over the past three days, Vitol, the world’s top independent oil trader, and French oil giant Total have snapped up 11 out of 17 cargoes that changed hands in a key pricing window run by Platts, a unit of S&P Global, according to traders and brokers.