Patheon Inc. is a pharmaceutical company with its corporate head offices in Durham, North Carolina, that provides contract development and manufacturing services of prescription and over-the-counter pharmaceutical products for approximately 400 pharmaceutical and biotechnology companies. It was founded in 1974 as Custom Pharmaceuticals Ltd., and changed its name to Patheon in 1993 when it was first publicly traded. The New York private equity firm JLL Partners has owned a controlling stake in Patheon since 2009. In 2014, Patheon merged with the drug manufacturing business of Royal DSM NV, becoming a joint-venture between JLL Partners and DSM. As of 2016, Patheon owns manufacturing sites in North America, Europe, Japan, Australia., and Canada Patheon was founded in Canada in 1974 as Custom Pharmaceuticals Ltd. In 1990, it began to expand to US markets. Custom Pharmaceuticals changed its name to Patheon in 1993 and was first publicly traded that year on the Toronto Stock Exchange.