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Camillo Castiglioni (22 October 1879 – 18 December 1957) was an Italian-Austrian financier and banker, and was the wealthiest man in Central Europe during World War I. Nicknamed "Austrian Stinnes", he was active in aviation's pioneering days and invested in the arts. Castiglioni was credited as being instrumental to the founding of what would eventually become BMW AG.

K2 Sports, LLC, known simply as K2, is an American sporting goods company headquartered in Seattle, Washington, focused primarily on winter sports equipment. K2 operates under the labels K2 Snow and K2 Skates, as well as its subsidiaries Backcountry Access, Ride Snowboards, Tubbs Snowshoes, Atlas Snow-Shoe Company, LINE Skis, Full Tilt Boots, and Madshus brands. Famous users of K2 Skis

Riddell Sports Group, commonly known as Riddell ( rə-DEL), is an American company specializing in sports equipment for Gridiron football. Founded in 1929 by John Tate Riddell, it was headquartered in Rosemont, Illinois, but in 2017, the company relocated to a new facility in Des Plaines, Illinois.