Anthera (ANTH) (TSCO) (UNH) (ZIP) (APKT) (ARNA) Ratings Reiterated

Anthera Pharmaceuticals, Inc. (NASDAQ: ANTH), Tractor Supply Co. (NASDAQ: TSCO), UnitedHealth Group Inc. (NYSE: UNH), Zipcar (NYSE: ZIP), Acme Packet, Inc. (NASDAQ: APKT) and Arena Pharmaceuticals, Inc. (NASDAQ: ARNA) had ratings on them reiterated by analysts.

Canaccord Genuity reiterated its "Buy" rating on Anthera Pharmaceuticals, Inc. (ANTH).

JPMorgan Chase & Co. (NYSE:JPM) reiterated its "Overweight" rating on Tractor Supply Co. (TSCO). They have a price target of $81.00 on the company.

Jefferies Group (NYSE:JEF) reiterated its "Buy" rating on UnitedHealth Group Inc. (UNH).

Needham & Company reiterated its "Buy" rating on Zipcar (ZIP).

Needham & Company reiterated its "Buy" rating on Acme Packet, Inc. (APKT). They have a price target of $30.00 on the company, down from $52.00.

Needham & Company reiterated its "Hold" rating on Arena Pharmaceuticals, Inc. (ARNA).