Here you can read some background articles related to Pandora's rise and fall:

"Pandora stock surges in IPO, then cools" CNN Money, June 15, 2011


"Sirius XM Completes Acquisition of Pandora" Variety, February 1, 2019

"Sirius XM Finally Ends Pandora's Misery" The Motley Fool, February 20, 2019