ROSEN, A RANKED AND LEADING FIRM, Reminds J2 Global, Inc. Investors of Important Deadline in Securities Class Action First Filed by the Firm – JCOM NEW YORK, Aug. 12, 2020 (GLOBE NEWSWIRE) -- Rosen Law Firm, a global investor rights law firm, reminds purchasers of the securities of J2 Global, Inc. (NASDAQ: JCOM) between October 5, 2015 and June...