Benzinga's M&A Chatter for Thursday November 12, 2015

The following are the M&A deals, rumors and chatter circulating on Wall Street for Thursday November 12, 2015:

:

Shares of Allergan

sold off sharply on Thursday, on a report from

that the US Treasury Department was considering more regulatory changes that would allow the US to block large inversion deals like the proposed Pfizer

acquisition of Allergan. A spokesperson for the Treasury Department told Benzinga via email "we are continuing our review of a broad range of options for further action, but there is a limit to what we can do administratively." Allergan shares fell 3% Thursday, closing at $300.14, falling below $300 after-hours.

:

SunEdison shares spiked higher Thursday, on unconfirmed market chatter of a potential stake by Google

. Sources say Google has a 100 million share stake in SunEdison and seeking to acquire the remaining shares for as much as $11.00 each. Spokespersons for SunEdison and Google did not respond to requests for comments SunEdison shares fell 7% Thursday, closing at $4.54.

:

ChemChina, is in talks to buy Swiss agricultural giant Syngenta AG

, according to sources as reported by

on Thursday. people with knowledge of the matter said. ChemChina is said to have offered the equivalent of $42 billion (449 Francs). The offer was reportedly rejected due to Syngenta's concerns over regulatory issues. Monsanto

had initially offered the same 449 Francs, then raising the offer to 470 Francs. Syngenta rejected both proposals, indicating the offers were too low and also citing regulatory concerns. Syngenta closed at $69.15 on Thursday and traded as high as $80.41 after-hours.