Benzinga's Top Upgrades, Downgrades For March 23, 2017 - Altria Group (NYSE:MO), Dollar Gen (NYSE:DG), Ultragenyx Pharmaceutical (NASDAQ:RARE)

Stifel Nicolaus upgraded Varonis Systems Inc VRNS from Hold to Buy. Varonis Systems shares rose 0.89 percent to close at $28.45 on Wednesday.
UBS upgraded Encana Corp (USA) ECA from Neutral to Buy. Encana shares gained 0.66 percent to $10.62 in pre-market trading.
RBC Capital upgraded SUPERVALU INC. SVU from Sector Perform to Outperform. SUPERVALU shares rose 0.30 percent to close at $3.34 on Tuesday.
Analysts at RBC Capital upgraded Kroger Co KR from Sector Perform to Outperform. Kroger shares rose 2.04 percent to $29.55 in pre-market trading.
Goldman Sachs upgraded FireEye Inc FEYE from Sell to Buy. FireEye shares rose 8.79 percent to $12.50 in pre-market trading.
Analysts at UBS upgraded Energen Corporation EGN from Neutral to Buy. Energen shares dropped 1.11 percent to close at $50.88 on Wednesday.
Analysts at UBS upgraded DDR Corp DDR from Sell to Neutral. DDR shares dropped 2.80 percent to close at $12.51 on Wednesday.

UBS downgraded Whiting Petroleum Corp WLL from Neutral to Sell. Whiting Petroleum shares dropped 3.21 percent to close at $8.15 on Wednesday.
Piper Jaffray downgraded Ultragenyx Pharmaceutical Inc RARE from Overweight to Neutral. Ultragenyx Pharmaceutical shares fell 7.45 percent to $72.52 in pre-market trading.
Analysts at RBC Capital downgraded Norfolk Southern Corp. NSC from Sector Perform to Underperform. Norfolk Southern shares fell 1.14 percent to $110.50 in pre-market trading.
Analysts at Goldman Sachs downgraded Proofpoint Inc PFPT from Neutral to Sell. Proofpoint shares fell 1.89 percent to $77.70 in pre-market trading.
Citi downgraded Centene Corp CNC from Buy to Neutral. Centene shares closed at $68.01 on Wednesday.
Analysts at RBC Capital downgraded Altria Group Inc MO from Sector Perform to Underperform. Altria shares dropped 1.07 percent to $74.27 in pre-market trading.
Credit Suisse downgraded Dollar General Corp. DG from Neutral to Underperform. Dollar General shares slipped 1.10 percent to $69.90 in pre-market trading.
Maxim Group downgraded Nimble Storage Inc NMBL from Buy to Hold. Nimble Storage shares declined 0.16 percent to $12.44 in pre-market trading.

Analysts at Stifel Nicolaus initiated coverage on Southwestern Energy Company SWN with a Buy rating. Southwestern Energy shares closed at $7.36 on Wednesday.
Analysts at Baird initiated coverage on FMC Corp FMC with a Neutral rating. The price target for FMC is set to $67. FMC shares closed at $61.22 on Wednesday.
Analysts at Baird initiated coverage of Darling Ingredients Inc DAR with an Outperform rating. The price target for Darling Ingredients is set to $19. Darling Ingredients shares closed at $14.26 on Wednesday.
Analysts at Stifel Nicolaus initiated coverage on Chesapeake Energy Corporation CHK with a Buy rating. Chesapeake Energy shares closed at $5.00 on Wednesday.
Analysts at Johnson Rice initiated coverage on CONE Midstream Partners LP CNNX with an Accumulate rating. CONE Midstream shares closed at $20.85 on Wednesday.
Analysts at Stifel initiated coverage on Cabot Oil & Gas Corporation COG with a Buy. Cabot Oil & Gas shares closed at $22.25 on Wednesday.