 Anpac Bio-Medical Science NASDAQ:ANPC and Natera NASDAQ:NTRA are both medical companies, but which is the superior stock? We will compare the two companies based on the strength of their profitability, risk, valuation, earnings, institutional ownership, analyst recommendations and dividends. Institutional and Insider Ownership 87.5 of Natera shares are held by institutional investors. 9.3 of Natera ... 