Sept 28 (Reuters) - Trans1 Inc, a medical device company, on Friday filed for an initial public offering of 5.5 million shares at an estimated price of $12 to $14 per share.
Lehman Brothers Inc, Piper Jaffray & Co, Cowen and Co LLC and Wachovia Capital Markets LLC are underwriting the IPO, the company said in an amended filing with the U.S. Securities and Exchange Commission.
