STEC (NASDAQ: STEC) rose 86.91% to $6.71 after Western Digital (NASDAQ: WDC) announced its plans to buy STEC for around $340 million.
Vanguard Health Systems (NYSE: VHS) jumped 64.70% to $20.67 after Tenet Healthcare (NYSE: THC) announced its plans to acquire the company for $4.3 billion including debt.
Keynote Systems (NASDAQ: KEYN) moved up 46.45% to $19.79 after the company agreed to be acquired by Thoma Bravo for $20.00 per share.
SORL Auto Parts (NASDAQ: SORL) shares jumped 12.45% to $2.98. SORL's PEG ratio is 0.89.
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