Sirius XM Adds 465K New Subs In Q1, Passes 30M Sub Mark By: Benzinga via Benzinga April 11, 2016 at 09:32 AM EDT Shares of Sirius XM Holdings Inc. (NASDAQ: SIRI) were trading lower by 0.26 percent early Monday morning despite the company's latest ... Read More >> Related Stocks: Bio-Techne Corp Siriusxm Holdings Inc