Amprius Technologies (NYSE:AMPX – Get Free Report) and Environmental Tectonics (OTCMKTS:ETCC – Get Free Report) are both business services companies, but which is the better investment? We will compare the two businesses based on the strength of their profitability, valuation, institutional ownership, risk, dividends, earnings and analyst recommendations. Insider and Institutional Ownership 2.6% of Amprius […]