[2] In 1909, German immigrant Otto Kolschowsky opened a family meat market in Oak Park, Illinois[3] two years after his arrival in the United States.

In 1917, he expanded into the wholesale meat trade and relocated the business to nearby Maywood, another Chicago suburb.

In 1955, Ray Kroc opened the first McDonald's restaurant in Des Plaines, Illinois with Otto & Sons as the supplier of fresh ground beef patties.

[4] In 1973, Otto & Sons opened its first high-volume meat plant in West Chicago with specially developed patty-forming machines and liquid nitrogen freezing tunnels.

OSI Group has more than 65 facilities in 17 countries around the world, located in North America, Western and Eastern Europe, and the Asia-Pacific region.

[37] In July 2014, a factory of OSI Group in Shanghai, China was ordered to shut down production by local government for selling expired meat to international fast food chains including McDonald's and KFC.