Benzinga's M&A Chatter for Wednesday August 7, 2013

The following are the M&A deals, rumors and chatter circulating on Wall Street for Wednesday August 7, 2013:

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AOL

announced Wednesday it has agreed to acquire video ad company Adap.tv for $405 million, including $322 million in cash and $83 million in AOL stock. The deal is expected to close in Q3 2013. AOL closed at $36.69 Wednesday, a gain of 1.5% on 4 times average volume.

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NICE Systems

announced Wednesday that it has agreed to acquire customer experience management company Causata, a provider of real-time Big Data analytics technology. The deal is expected to close in a few days. NICE Systems closed at $37.52 Wednesday, a loss of 2.5% on average volume.

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Share of Onyx Pharmaceuticals

fell Wednesday while shares of Amgen

soared higher on a report from

that the companies are negotiating a deal at $130 per share. According to sources, a deal could be announced within a week. Amgen's original offer of $120 per share was rejected by the Onyx Board. Onyx Pharmaceuticals closed at $128.21 Wednesday, a loss of almost 3% on 3.5 times average volume. Amgen shares gained almost 7%, closing at $112.40.