Advance Auto Parts, Inc. engages in the supply and distribution of aftermarket automotive products for both professional installers and do-it-yourself customers. The company is headquartered in Raleigh, North Carolina and currently employs 40,000 full-time employees. The company went IPO on 2001-11-29. Its stores and branches offer a range selection of brand names, original equipment manufacturer (OEM) and owned brand automotive replacement parts, accessories, batteries and maintenance items for domestic and imported cars, vans, sport utility vehicles and light and heavy-duty trucks. Its stores operate primarily under the trade names Advance Auto Parts and Carquest and its branches operate under the Worldpac trade names. The company operates approximately 4,785 stores and 320 Worldpac branches primarily within the United States, with additional locations in Canada, Puerto Rico and the U.S. Virgin Islands. The firm also serves approximately 1,307 independently owned Carquest branded stores across these locations in addition to Mexico and various Caribbean islands.