|Headquarters:||New York, NY|
Penton Media, Inc. , founded in 1892 by John Penton, is a diversified business-to-business media company. Penton Media is a mass media corporation that publishes and produces 113 magazines, 96 trade shows, 145 websites and has over six million subscribers across 17 different market segments. Numerous corporate acquisitions, sales, and mergers have occurred over the years. Wasserstein & Co. purchased Prism Business Media from Primedia in August 2005 for $385 million.