Mealey's (February 18, 2022, 9:45 AM EST) -- SAN FRANCISCO — A federal judge in California on Feb. 14 ruled that the lead plaintiff in a securities class action against a manufacturer of products and services used in the study of health and disease and two of its senior executives has failed to sufficiently plead scienter in alleging that the defendants violated federal securities laws by concealing that the company’s cytometry segment sales would not meet revenue expectations....