Johnson Fistel, LLP Announces Investigations of Aqua Metals, Inc., Ellie Mae Inc., PayPal Holdings, Inc., Xerox Corporation and OSI Systems, Inc.; Investors Encouraged to Contact Firm

SAN DIEGO, Feb. 1, 2018 /PRNewswire/ -- Shareholder Rights Law Firm Johnson Fistel, LLP is investigating potential claims against Aqua Metals, Inc., Ellie Mae Inc., PayPal Holdings, Inc., Xerox Corporation and OSI Systems, Inc., as detailed below: Aqua Metals, Inc. Shareholder...