Piper Jaffray Upgrades Horizon Pharma To Overweight By: Benzinga via Benzinga March 31, 2015 at 09:29 AM EDT Analysts at Piper Jaffray upgraded Horizon Pharma plc (NASDAQ: HZNP) from Neutral to Overweight. The price target for Horizon Pharma ... Read More >> Related Stocks: Horizon Therapeutics