Aurora Diagnostics Inc filed with U.S. regulators on Friday to raise up to $150 million in an initial public offering of common stock.

The Palm Beach Gardens, Florida-based company told the U.S Securities and Exchange Commission in a preliminary prospectus that Morgan Stanley & Co will lead the underwriters for the IPO.

The company, which provides key services for the diagnosis of cancer and other diseases, intends to list its common stock on Nasdaq under the symbol "ARDX". (Reporting by Sweta Singh in Bangalore; Editing by Maju Samuel)

VENICE, Louisiana (Reuters) - A huge wind-driven oil slick bore down on the U.S. Gulf coast on Sunday, threatening an environmental catastrophe, and the Obama administration heaped pressure on BP Plc to halt the uncontrolled spill from its ruptured Gulf of Mexico well. [Read the full article]

PAA Natural Gas Storage LP priced an expanded initial public offering above expectations Thursday night, raising $252 million.

PAA Natural Gas Storage is the first company to price above expectations since Metals USA Holdings Corp., a metals processor whose stock fell 8.6 percent on its first day of trading April 9.

The Houston company, a unit of Plains All American Pipeline LP, sold 11.7 common units to initial investors at $21.50 apiece. In a regulatory filing last week, it had said it expected to price 10 million units from $19 to $21 each.

The underwriters, led by Barclays Capital, UBS Investment Bank, Citi and Wells Fargo Securities, can buy 1.8 million additional units to cover excess demand for the IPO.

The company operates the natural gas storage facilities Plains All American Pipeline acquired from Sempra Energy in 2005. It makes money from renting natural gas storage services to its customers. [Read the full article]

Uralchem, the Russian fertilizer company that was planning an initial public offering, has reportedly pulled the listing because of insufficient investor interest, The Telegraph said, citing media reports.

The planned $600 million I.P.O. may be pushed to a later date, people familiar with the situation told Dow Jones Newswires. Books were due to close Thursday with conditional dealing expected to begin Friday.

Uralchem, the Russian fertilizer company that was planning an initial public offering, has reportedly pulled the listing because of insufficient investor interest, The Telegraph said, citing media reports.

The planned $600 million I.P.O. may be pushed to a later date, people familiar with the situation told Dow Jones Newswires. Books were due to close Thursday with conditional dealing expected to begin Friday. [Read the full article]

Diagnostic laboratory company Aurora Diagnostics Inc. on Friday filed for an initial public offering worth up to $150 million.

Aurora performs tests to help detect cancer and other diseases. According to a filing with the Securities and Exchange Commission, it runs 19 primary laboratories and did 1.6 million tests last year. The company is based in Palm Beach Gardens, Fla., and began operations in June 2006.

If the company completes its IPO, its shares will trade on the Nasdaq Global Market under the symbol "ARDX." Aurora said it will use some of the proceeds for working capital and possibly some acquisitions. Some shares will be sold by the company's backers Summit Partners and KRG Capital Partners. Aurora won't get proceeds from the sale of those shares.

The underwriters of the proposed IPO are Morgan Stanley, UBS, Barclays, RBC Capital Markets, BMO Capital Markets, and Lazard Capital Markets. [Read the full article]