JSE-listed platinum miner Northam Platinum achieved a 226.7% year-on-year increase in normalised headline earnings of R1.4-billion for the financial year ended June 30 Its equivalent refined metal production for the year increased by 7.4% to 519 954 oz of platinum, palladium, rhodium and gold (4E), with increased contributions from both Booysendal and Zondereinde.