ZS Pharma in talks with Actelion

ZS Pharma Inc. (NASDAQ:ZSPH) confirmed in a statement after market close that it has "participated in preliminary discussions" with Actelion Ltd. (SIX:ATLN) about a "potential strategic transaction." ZS gained $16.54 (28%) to $74.73 Thursday, lifting its market cap to $1.9 billion, after media reports during trading hours said Actelion had made a preliminary offer to buy the company. Actelion did not respond to inquiries. ...