Apr 15, 2021 · WALTHAM, Mass. and WILMINGTON, N.C., April 15, 2021 /PRNewswire/ -- Thermo Fisher Scientific Inc. (NYSE: TMO) ("Thermo Fisher "), the world leader in serving science, and PPD, Inc. (Nasdaq: PPD) ("PPD"), a leading global provider of clinical research services to the pharma and biotech industry, today announced that their boards of directors have approved a definitive agreement