Money Oprah Winfrey loses $58 million on Weight Watchers investment as stock plunges February 27, 2019February 27, 2019Nathan Bomey, USA TODAYComments Off on Oprah Winfrey loses $58 million on Weight Watchers investment as stock plunges Concerns about a slowdown in membership growth for Weight Watchers International delivered a huge blow to Oprah's investment in the dieting company.