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Wall Street was flat on Friday as investors digested U.S. corporate earnings as well as data that pointed to a slow global economic recovery, ahead of a crucial meeting of oil producers to help tackle a global surplus. The Dow Jones industrial average was down 0.07 percent at 17,913.59, the S&P 500 was down 0.07 percent at 2,081.24 and the Nasdaq Composite was down 0.03 percent at 4,944.414.
** BATS GLOBAL MARKETS INC, $22.81, +20.05 pct
BATS shares rose as much as 20.5 percent in their debut on the company's own exchange on Friday - redemption after a botched attempt to go public in 2012.
** POLYCOM INC, $12.195, -0.61 pct
** MITEL NETWORKS CORP, $7.2, -8.63 pct
Mitel said it would buy fellow voice and telephony gear maker Polycom Inc for about $1.96 billion in cash and stock, satisfying a demand from hedge fund Elliott Management.
** SUNEDISON INC, $0.3811, -34.87 pct
The solar energy company said it was in talks for potential debtor-in-possession financing with some of its first- and second-lien lenders.
** CITIGROUP INC, $45.29, +0.69 pct
Shares of the bank up as it posted a better-than-expected first-quarter profit, helped by lower operating expenses.
** VALEANT PHARMACEUTICALS INTERNATIONAL INC, $32.58, +0.68 pct
The Canadian drug maker has brought in investment banks to review its options amid interest from buyout firms and other companies in a number of its businesses, according to people familiar with the matter.
** GREAT BASIN SCIENTIFIC INC, $4.979, +82.38 pct
The molecular diagnostics company reported a 60 percent jump in first-quarter revenue as it added new customers.
** AUTOHOME INC, $31.66, +4.97 pct
Autohome, a Chinese automobile information website operator, said insurer Ping An Insurance Group Co will buy 47.7 pct stake in the company from Australian telecoms company Telstra Corp for $1.6 bln.
** ENSCO PLC,, $9.74, -8.03 pct
The UK-based offshore driller's upsized offering was priced at a 12.7 pct discount to the stock's Thursday close.
** NABORS INDUSTRY LTD, $9.725, -2.94 pct
** HELMERICH AND PAYNE INC, $57.46, -3.74 pct
** PATTERSON-UTI Energy Inc, $17.415, -4.52 pct
Shares of oil, gas and related companies fell due to lower oil prices as analysts say a weekend meeting of major oil exporters in Doha will do little to help clear global oversupply quickly.
** RELYPSA INC, $19.5005, -11.68 pct
Morgan Stanley analysts said Relypsa's drug for high blood potassium appears to be facing significant headwinds in the form of reimbursement concerns and prescriber adoption.
** E-HOUSE CHINA HOLDINGS LTD, $6.545, +4.22 pct
The China-based real estate services company said it will be taken private by parent E-House Holdings. (Reporting by Vishaka George in Bengaluru; Editing by Anil D'Silva)