PSO LOSS ALERT: Rosen Law Firm Reminds Pearson plc Investors of Important Deadline in Class Action – PSO NEW YORK, April 06, 2017 (GLOBE NEWSWIRE) -- Rosen Law Firm, a global investor rights law firm, reminds purchasers of Pearson plc securities (NYSE:PSO) from January 21, 2016 through January 17,...