Aurora Cannabis Inc. said Wednesday it appointed Michael Singer, who was previously chairman of the board, as executive chairman. It also named Ronald Funk lead independent director and Margaret Atkins as new independent director and chair of the audit committee. Diane Jang, who had been on the board since November 2017, has resigned her position as director. "As Aurora continues to mature into one of the world's largest and leading cannabis companies, it is important that our board continues to examine its composition to ensure that its experience and expertise aligns with the company's strategic direction," Singer said. Aurora's stock, which was still inactive in premarket trade, has rallied 15% over the past three months, while the ETFMG Alternative Harvest ETF has hiked up 23% and the S&P 500 has gained 5.2%.