John M. Gregory is an American businessman. He was former CEO of King Pharmaceuticals, Inc. and resides in Bristol, Tennessee. In addition to founding King Pharmaceuticals in 1993, Gregory has founded several other notable business ventures including SJ Strategic Investments and Leitner Pharmaceuticals. Gregory has also made major investment outside of the pharmaceutical industry, such as his investments within the privately held United Coal Company located in southwest Virginia and Adams Golf with U.S. corporate offices in Texas. Most recently, Gregory, along with other family members, began Gregory Pharmaceutical Holdings Inc. which include pharmaceutical contract manufacturing company, UPM Pharmaceuticals, and NFI Consumer Products which includes the Blue-Emu brand of products.