SIRI - Citi upgrades Sirius XM to Buy March, 31 2020 09:20 AM Sirius XM Holdings Inc. Sirius XM (NASDAQ:SIRI) is up 0.8% premarket following an upgrade to Buy at Citi, from Neutral.More news on: Sirius XM Holdings Inc., The Liberty SiriusXM Group, The Liberty SiriusXM Group, Tech stocks news, Read more ...