Founder: Ermenegildo Zegna
Year Founded: 1910

Ermenegildo Zegna is arguably the most successful of the fully-integrated firms in menswear. The company started as a fabric producer in 1910, but when the company's founder, Mr. Zegna, died in 1966, he left the company to his sons. They decided to use the company's reputation to capitalize on the then growing market for high-end Italian suits. By the 1970s, the company developed into a full menswear line, including the production of knitwear, neckties, and sportswear. Today, it controls almost every aspect of production – from working with breeders to ensure its sourcing of high-end raw materials, to the fabrication of textiles, to the designing and production of garments, to the marketing and selling of products both inside its own brand shops and other retail outlets.