BRIEF-Mannatech Q3 earnings per share $0.50 By: Reuters: Company News November 07, 2017 at 06:21 AM EST * Mannatech Inc - Q3 net sales for 2017 were $42.0 million, a decrease of $6.1 million, or 12.8% as compared to $48.1 million in Q3 of 2016 Read More >> Related Stocks: Mannatech Inc