Patterson Companies, Inc. provides products, technologies, services and business solutions to oral and animal health customers in North America and the U.K. The company was established in 1877 as a dental company. It entered the animal health industry in 2001 with its acquisition of Webster Veterinary and expanded with its 2015 acquisition of Animal Health International, Inc. In 2008, it was noted as having one of the lowest debt ratios among companies in the health care sector. Patterson was also a member of the Nasdaq-100 until December 10, 2010 when it and six other companies were replaced. The Nasdaq-100 is composed of the 100 largest non financial stocks traded on the Nasdaq. On June 17, 2010, Patterson Medical purchased the rehabilitation part of Ireland-based DCC Healthcare in a move that increased Patterson Medical's revenue by 16.43%. The new companies were added to its Homecraft Rolyan unit in the UK. Wikipedia