Pfizer Inc. is a research-based global biopharmaceutical company, which engages in the discovery, development, manufacture, marketing, sales and distribution of biopharmaceutical products worldwide. The firm works across developed and emerging markets to advance wellness, prevention, treatments and cures that challenge the most feared diseases. The company was founded by Charles Pfizer Sr. and Charles Erhart in 1849 and is headquartered in New York, NY.