Benzinga's M&A Chatter for Monday October 8, 2012

The following are the M&A deals, rumors and chatter circulating on Wall Street for Monday October 8, 2012:

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UnitedHealth Group

and Brazil's Amil Participações announced Monday that the companies have agreed to merge. UnitedHealth Group intends to acquire 90 percent of the 359 million outstanding common shares of Amil for approximately $4.9 billion in cash. This includes realizable Brazilian tax benefits worth an estimated present value of $600 million, bringing the effective equity purchase price to approximately $4.3 billion. Brazilian regulatory approval is expected in the fourth quarter of 2012, UnitedHealth Group closed at $57.60 Monday, a gain of 0.82% on average volume.

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Marathon Petroleum

announced Monday it has signed a definitive agreement to purchase BP`s

451,000 barrel per calendar day Texas City refinery, three intrastate NGL pipelines originating at the refinery, an allocation of BP`s Colonial Pipeline Company shipper history, four terminals, retail marketing contract assignments for approximately 1,200 branded sites and a 1,040 megawatt cogeneration facility for $598 million, plus inventories estimated at $1.2 billion and an earnout provision under which MPC could pay up to an additional $700 million over six years, subject to certain conditions. The transaction is expected to be accretive to earnings in the first year of operation. The acquisition is expected to be funded with cash on hand, and is anticipated to close early in 2013, subject to customary closing conditions and regulatory approvals. Marathon Petroleum closed at $57.92 Monday, a gain of 5.56% on 3 times average volume.

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TPC Group

announced Monday that it has received a non-binding proposal to be acquired by Innospec

. As part of this proposal, Innospec would pursue an acquisition of all of TPC Group's common shares for an all-cash purchase price in the range of $44 to $46 per share. The proposal is subject to certain conditions, including, among others, securing requisite debt financing, completion of due diligence and receipt of internal approvals. Equity financing for the proposed acquisition will be provided by a fund, Blackstone Capital Partners VI, L.P., managed by Blackstone on behalf of its private equity investors. TPC Group closed at $45.88 Monday, a gain of 12.81% on 6 times average volume.