Beware of ‘zombie’ companies running rampant in the stock market By: MarketWatch November 24, 2020 at 12:48 PM EST A total of 19%, or 571 companies, in the Russell 3000 Index are considered unviable, writes William Barritt. Read More >> Related Stocks: ADT Inc AMC Entertainment Holdings Adobe Systems Amazon.com Community Health Systems Costco Wholesale Hasbro Mattel Moderna Inc Roku Inc Salesforce Servicenow Inc Tesla, Inc. Thermo Fisher Scientific Transocean Ltd Uber Technologies Inc Visa Wayfair Inc Zoetis