 LOS ANGELES--BUSINESS WIRE--- FBIO classaction--The Law Offices of Frank R. Cruz announces an investigation of Fortress Biotech, Inc. Fortress or the Company NASDAQ: FBIO on behalf of investors concerning the Companys possible violations of federal securities laws. If you are a shareholder who suffered a loss, click here to participate. Fortress develops and commercializes pharmaceutical and biotechnology products. In December 2019, the Companys majority-controlled subsidiary, Avenue Therapeutics, Inc. 