Head of Global Sales and Marketing Markus Meurer said purchases in 2017 would rise to as much as 600,000 oz of palladium, compared to 160,764 oz last year.
Katanga, which operates cobalt and copper mines in the DRC, said Aristotelis Mistakidis, Liam Gallagher and Tim Henderson had tendered their resignations.
President Rodrigo Duterte's decision not only ignores demands from pro-mining groups but also from members of his own government, including the current environment minister Roy Cimatu.
London hedge fund giant Lansdowne Partners lost a long-term bet against Glencore this year after the spectacular recovery of the miner took some by surprise.