Biggest Gainers (PRM) (VITA) (TISA) (CISG) (ENOC) (CONM) MaY 16

For May 16, the biggest stock gainers on the day are PRIMEDIA Inc. (NYSE:PRM), Orthovita Inc (NASDAQ:VITA), Top Image Systems, Ltd.(NASDAQ:TISA), CNinsure Inc (NASDAQ:CISG), EnerNOC, Inc.(NASDAQ:ENOC) and Conmed Healthcare Management (AMEX:CONM).

Conmed Healthcare Management (CONM) was trading at 3.70, gaining $0.65, or 21.31 percent.

EnerNOC, Inc. (ENOC) was trading at $21.31, up $4.26, or 24.99 percent.

CNinsure Inc (CISG) was at $17.47, jumping $4.31, or 32.75 percent.

Top Image Systems, Ltd. (TISA) was trading at $2.97, rising $0.92, or 44.88 percent.

Orthovita Inc (VITA) was trading at $3.83, surging $1.0950, or 40.11 percent.

PRIMEDIA Inc. (PRM) was trading at $7:02, soaring $2.64, or 60.27 percent.

Ratings on (TSS) (TU) (TW) (VITA) Upgraded

Ratings on Total System Services, Inc. (NYSE: TSS), TELUS Co. (NYSE: TU), Towers Watson and Co (NYSE: TW) and Orthovita, Inc. (NASDAQ: VITA) upgraded by analysts today.

Goldman Sachs (NYSE:GS) upgraded Total System Services, Inc. (TSS) from a “sell” rating to a “buy” rating. They have a price target of $23.00 on the stock.

RBC Capital upgraded TELUS Co. (TU) from a “sector perform” rating to an “outperform” rating. They have a price target of $56.00 on the company, up from $52.00.

William Blair upgraded Towers Watson and Co (TW) from a “market perform” rating to an “outperform” rating.

Canaccord Genuity upgraded Orthovita, Inc. (VITA) from a “hold” rating to a “buy” rating.