GSK: Can This Pharma Giant Sustain Its 5.2% Yield? By: TalkMarkets June 16, 2021 at 19:47 PM EDT GlaxoSmithKline’s free cash flow has been up and down. Over the past three years, it has grown substantially, though this year, it is forecast to drop 18%. Read More >> Related Stocks: Gsk Plc ADR Harley-Davidson