NEW YORK (TheStreet) -- RATINGS CHANGES

Amazon (AMZN - Get Report) was upgraded to outperform by market perform by JMP Securities, which set a $575 price target, saying the company can continue to expand margins and gain market share.

Analog Devices (ADI - Get Report) was downgraded to hold from buy by Drexel Hamilton, which set a $65 price target, saying the company is seeing lower industrial chip demand.

Apple (AAPL - Get Report) was downgraded to market perform from outperform by Cowen, which set a $130 price target, saying that iPhone builds are tracking lower.

AMC Entertainment (AMC) was upgraded to buy from hold by MKM Partners, which set a $42 price target, saying that incremental value from the Starplex acquisition and a more reasonable 7x 2016E PF theatre level Ebitda valuation following the deal announcement and a 9.5% decline in AMC shares since April 9.

Asbury Automotive (ABG - Get Report) was downgraded to underperform from neutral by Bank of America/Merrill Lynch, which cited valuation, based on a $104 price target.

Crown Castle (CCI - Get Report) was upgraded to buy by Citigroup, which set a $92 price target, saying the company should see accelerating revenue growth and return more cash to investors.

Crown Holdings (CCK - Get Report) was upgraded to buy by TheStreet Ratings. You can view the full analysis from the report here: CCK Ratings Report.

Intuitive Surgical (ISRG - Get Report) was upgraded to buy from hold by Canaccord Genuity, which set a $615 price target, saying that procedure growth is accelerating.

Linear Technology (LLTC) was downgraded to buy from hold by Drexel Hamilton, which set a $45 price target, saying the company is seeing weak orders and lower utilization.

Packaging Corp. (PKG - Get Report) was upgraded to outperform by BMO Capital, which set a $76 price target, saying the company is seeing higher volume and is cutting costs.

Palo Alto Networks (PANW - Get Report) was downgraded to sell by TheStreet Ratings. You can view the full analysis from the report here: PANW Ratings Report.

Pentair (PNR - Get Report) was downgraded to hold from buy by Jefferies, which set a $63 price target, saying that weak markets and margins reduce earnings further.

Sonic Automotive (SAH - Get Report) was upgraded to buy from neutral by Bank of America/Merrill Lynch, which set a $28 price target, saying that the company offers growth at a reasonable price.

S&T Bancorp (STBA - Get Report) was downgraded to neutral from overweight by Piper Jaffray, which cited valuation, based on a $32 price target.

TD Ameritrade (AMTD - Get Report) was downgraded to sell from neutral by Citigroup, which set a $33 price target, saying it sees risks to trading revenue and interest-rate leverage.

United Natural Foods (UNFI - Get Report) was downgraded to neutral from outperform by Wedbush, which set a $60 price target and cut the company from its Best Ideas list, saying the company is facing increased competition.

United Technologies (UTX - Get Report) was downgraded to hold from buy by Deutsche Bank, which set a $112 price target and said estimates have also been cut, given the company's new guidance.