Quill Corporation is an American office supply retailer, founded in 1956, and headquartered in Lincolnshire, Illinois. It services more than one million small and mid-sized U.S. business customers, with access to over one million assorted products. While over 70% of sales are conducted online, it also employs mail-order and direct sales models. It is considered to be among the largest business-to-business direct markets of office supplies in the United States, but it also sells products in other categories such as technology, cleaning & breakroom supplies, furniture, safety products and professional medical equipment through its Quill Healthcare unit. Quill is owned by Staples, Inc., and is recognized as their most profitable division, accounting for about 25% of the company's net income. Between 1998 and 2009, Quill grew from $500 million in revenues to over $1 billion. It employs approximately 500 people and has twelve distribution centers, led by its president Sergio Pereira.