 Amarin NASDAQ:AMRN and Merck KGaA OTCMKTS:MKGAF are both medical companies, but which is the superior stock? We will compare the two businesses based on the strength of their earnings, analyst recommendations, valuation, risk, dividends, institutional ownership and profitability. Institutional and Insider Ownership 44.4 of Amarin shares are owned by institutional investors. 2.8 of Amarin shares ... 