Achillion Pharmaceuticals (ACHN) was upgraded at William Blair to outperform. Twelve-month price target is $18. Company monetized its HCV franchise and will focus on Factor D, William Blair said.

Achillion Pharmaceuticals was downgraded at JMP Securities to market perform from market outperform. Twelve-month price target is $24. ACHN is reinventing itself by outsourcing HCV and focusing on preclinical assets, JMP Securities said. The analysts downgraded the stock as they believe the HCV franchise is fairly valued at current levels, JMP Securities also said.

Computer Sciences (CSC) was upgraded at Morgan Stanley to neutral from underweight. Twelve-month price target is $66. Business split should unlock shareholder value, Morgan Stanley said.

Express Scripts (ESRX) was initiated with a neutral rating at Robert Baird. Twelve-month price target is $94. Valuation call, given the company's lower growth potential, Robert Baird said.

Facebook (FB) was upgraded to buy at TheStreet Ratings. You can view the full analysis from the report here: FB Ratings Report.

Keurig Green Mountain (GMCR) was downgraded at Argus to hold from buy. Company is seeing lower sales and will likely face price competition, Argus said.

Lending Club (LC - Get Report) was upgraded at Morgan Stanley to overweight from equal weight. Twelve-month price target is $23. Upgrading on account of its recent selloff, Morgan Stanley said. Recent competitive fears are overblown, and the online peer-to-peer lender's long-term growth potential is underestimated, Morgan Stanley said.

Lions Gate Entertainment (LGF) was initiated with a buy rating at Jefferies. Twelve-month price target is $37. LGF is an attractive pure play on the long-term value of premium content across platforms, Jefferies said.

Sarepta Therapeutics (SRPT) was upgraded at Canaccord Genuity to buy from hold. Twelve-month price target is $30. Analysts are upgrading shares on reduced near-term regulatory risk and potential upcoming catalysts following the company's positive pre-NDA meeting with the Food and Drug Administration, Canaccord Genuity said.

Sony (SNE) was downgraded to hold at TheStreet Ratings. You can view the full analysis from the report here: SNE Ratings Report.

Ultimate Software (ULTI) was upgraded at Needham to buy from hold. Twelve-month price target is $195. Company can continue to deliver 20% annual subscription billings growth, Needham said.

Vivint Solar (VSLR) was initiated with an outperform rating at Northland Capital. Twelve-month price target is $20. VSLR will benefit from robust solar installation market through and beyond 2016, Northland Capital said.

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This article was written by a staff member of TheStreet.