Company files IPO

FORT MYERS — Cancer-treatment firm 21st Century Oncology Holdings plans to raise nearly $348 million by selling common and preferred stock to the public, according to a registration statement with the Securities and Exchange Commission.

This is the second time the company is going public. Formerly known as Radiation Therapy Services, the operator of 185 cancer-treatment centers went public in 2004. In 2008,Vestar Capital Partners acquired the company in a $1.1 billion leveraged buyout and took it private.

The Fort Myers-based company plans to sell 13.3 million shares of common stock between $14 and $16 a share under the symbol ICC on the New York Stock Exchange. Morgan Stanley, J.P. Morgan Securities and Wells Fargo Securities are the lead underwriters and they will have an option to purchase another 2 million shares.