Benzinga's M&A Chatter for Thursday September 17, 2015

The following are the M&A deals, rumors and chatter circulating on Wall Street for Thursday September 17, 2015:

:

Perrigo Company plc

announced Thursday, that its Board of Directors has reviewed Mylan's

unsolicited tender offer to acquire all of the outstanding shares of Perrigo saying the offer substantially undervalues the Company and does not adequately compensate shareholders for Perrigo's exceptional growth prospects. Mylan announced on September 14, that it had officially commenced its formal offer to acquire all outstanding ordinary shares of Perrigo for $75 in cash and 2.3 Mylan ordinary shares for each Perrigo ordinary share. Perrigo closed at $181.08 on Thursday, a loss of $1.31.

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Altice N.V.

and Cablevision Systems Corporation

announced Thursday, that they have entered into a definitive agreement for Altice to acquire Cablevision for $34.90 in cash for each Cablevision share. The transaction is to be financed with $14.5 billion of new and existing debt at Cablevision, cash on hand at Cablevision and $3.3 billion of cash from Altice. The deal is expected to close in H1 of 2016, subject to regulatory approvals. Cablevision closed at $12.92 Thursday, up 62%.

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Shares of HollyFrontier Corporation

spiked higher Thursday following a rumor circulating that Tesoro Corporation

had cancelled out of an upcoming conference. An unconfirmed source reported that Tesoro was making an offer to acquire HFC. A spokesperson for Tesoro told

via email that the company had cancelled out of the conference months ago, due to a scheduling conflict. HollyFrontier shares closed at $46.59 on Thursday, a gain of 2.5%. Tesoro gained 1%, closing at $93.88.