Grinders processed 47,000 tonnes of beans in March, up from 44,000 tonnes in the same period the previous year.
Ivory Coast's 2019/20 season Q2 (October to March) grind reached 282,000 tonnes, up from 270,000 tonnes a year before.
The GEPEX data only covers six of the largest grinding companies, including Barry Callebaut, Olam International Ltd and Cargill Inc, among 12 active firms.
Ivory Coast has total grinding capacity of 712,000 tonnes.
The country is the world's top cocoa producer and vies with the Netherlands for the spot of leading grinder.