GSK (GSK) said Chief Executive Emma Walmsley would step down and be succeeded by commercial chief Luke Miels, as the drugmaker works to replenish its product lineup. Walmsley will step down at the end of the year, having led the company through the Covid-19 pandemic, tensions with activist investor Elliott Management and a portfolio shake-up that included the spinoff of its consumer-healthcare business. Most Read from The Wall Street Journal The leadership change comes as GSK seeks to bring to market mo ...