Benzinga's M&A Chatter for Wednesday March 19, 2014

The following are the M&A deals, rumors and chatter circulating on Wall Street for Wednesday March 19, 2014:

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Horizon Pharma

and Vidara Therapeutics announced Wednesday an agreement under which Horizon will acquire Vidara through a reverse merger for $660 million in stock and cash. Under the terms of the agreement, stockholders of Horizon Pharma would own approximately 74 percent of Horizon Pharma and Vidara shareholders would own approximately 26 percent. Shareholders of Horizon Pharma would receive one ordinary share of Horizon Pharma, in exchange for each share of Horizon Pharma common stock they own at closing. The deal is expected to close mid-year 2014. Horizon Pharma closed Wednesday at $16.02, a gain of 9%.

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Palo Alto Networks

is in advanced talks to acquire cyber security company Cyvera, according to Israel's

. Sources say the purchase price will be $150-$200M. Spokespersons for the two companies declined comment. Palo Alto Networks closed Wednesday at $78.66 a loss of 1.5%.

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Shares of Treehouse Foods

surged higher Wednesday on a report from

that the company has joined a list of companies bidding for privately-held Micahel Foods.

reported on January 16 that Tyson Foods

was considering an offer of $2B+ for Michael Foods. A spokesperson for Tyson declined comment on this new report. Spokespersons for Treehouse and Michael Foods were not available for comment. Treehouse Foods closed Wednesday at $74.90, a gain of almost 2%. Tyson Foods closed at $41.91, a loss of 1%.