Online radio firm Pandora floats for $2.6bn in New York
15 June 2011 Last updated at 22:25 BST
The US internet radio service Pandora Media rose sharply on its debut on the New York Stock Exchange, before falling back.
The firm, which has yet to make a profit, had an offering price of $16 (£9.76) a share.
It rose as high as $26 a share on Wednesday before settling down to around $18.75.
Jillian Martin reports.