 Arch Therapeutics OTCMKTS:ARTH and Atrion NASDAQ:ATRI are both small-cap medical companies, but which is the superior investment? We will contrast the two companies based on the strength of their profitability, dividends, institutional ownership, earnings, analyst recommendations, risk and valuation. Insider Institutional Ownership 0.0 of Arch Therapeutics shares are held by institutional investors. Comparatively, 66.6 ... 