Nektar Therapeutics (NASDAQ:NKTR – Get Free Report) and Protalex (OTCMKTS:PRTX – Get Free Report) are both medical companies, but which is the superior stock? ProfitabilityThis table compares Nektar Therapeutics and Protalex’s net margins, return on equity and return on assets. Get Nektar Therapeutics alerts:Net Margins Return on Equity Return on Assets Nektar Therapeutics -192.87% -456.53% -57.80% Protalex N/A N/A N/AAnalyst RecommendationsThis is a summary of recent ratings and target prices for Nektar Therapeutics and Protalex, as provided by MarketBeat.com. Given Nektar Therapeutics’ stronger consensus rating and higher possible upside, analysts clearly believe Nektar Therapeutics is more favorable than Protalex. Gross Revenue Price/Sales Ratio Net Income Earnings Per Share Price/Earnings Ratio Nektar Therapeutics $98.43 million 7.42 -$118.96 million ($7.97) -4.51 Protalex N/A N/A N/A N/A N/AProtalex has lower revenue, but higher earnings than Nektar Therapeutics.