Benzinga's M&A Chatter for Monday November 11, 2013

The following are the M&A deals, rumors and chatter circulating on Wall Street for Monday November 11, 2013:

:

Shire

and ViroPharma

announced that Boards of Directors have approved a merger agreement, whereby Shire will acquire all the outstanding shares of ViroPharma for $50 per share in cash, or $4.2 billion. The deal is expected to close in Q4 2013 or Q1 2014. ViroPharma closed Monday at $49.42, a gain of 25%.

:

Shares of Walter Energy

rose in the pre-market on unconfirmed market chatter of a possible $35.00/share bid from BHP Billiton

. Walter Energy is the subject of frequent takeover chatter. A spokesperson for BHP Billiton declined comment on the rumor but reiterated comments from the CEO that the company was focused on existing ore bodies. A Walter Energy spokesperson was not available for comment. Walter Energy closed Monday at $18.49, a loss of $0.13.

:

Tsinghua Unigroup and RDA Microelectronics

announced Monday that Tsinghua Unigroup will acquire all of the outstanding ordinary shares of RDA for $18.50 per ADS or approximately $910 million. The deal is expected to close in the first half of 2014. RDA Microelectronics closed Monday at $27.75, a gain of more than 11%.