GlaxoSmithKline PLC (GSK.L, GSK) reported 2015 core operating profit of 5.7 billion pounds, 9% lower than in 2014 in CER terms on a turnover increase of 6%. On a pro-forma basis, core operating profit was 2.7% lower in CER terms on a turnover increase of 1%. Core earnings per share was 75.7 pence, down 15% from last year.