Benzinga's M&A Chatter for Monday August 26, 2013

The following are the M&A deals, rumors and chatter circulating on Wall Street for Monday August 26, 2013:

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TMS International Corp.

and The Pritzker Organization announced Monday that certain members of the Pritzker family will acquire TMS in an all-cash transaction valued at approximately $1 billion, including refinanced third-party debt. TMS stockholders will receive $17.50 in cash for each share of TMS Class A common stock and Class B common stock. The deal is expected to close in Q4 2013. TMS International closed at $17.48 Monday, a gain of 12%.

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AstraZeneca

announced Monday that its MedImmune biologics research and development arm, will acquire Amplimmune, a privately-held, Maryland, US-based biologics company, for an initial consideration of $225 million and deferred consideration of up to $275 million based on reaching predetermined development milestones. The deal is expected to close in Q3 2013. AstraZeneca closed at $50.47 Monday, a loss of $0.20.

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BATS Global Markets and Direct Edge Holdings announced Monday a definitive merger agreement, which will create the second largest US exchange behind the NYSE

and ahead of the Nasdaq

. Financial terms were not disclosed. The deal is expected to close in H1 2014.