Companies Headquartered in Naperville
Calamos
Headquarters: Naperville
Founded In: 1977
Infogix, Inc.
Description: multinational analytics corporation
Headquarters: Naperville
Founded In: 1982
Industry: information technology
Laidlaw
Description: transportation company
Headquarters: Naperville
Founded In: 1924
Nalco Holding Company
Description: company
Headquarters: Naperville
Founded In: 1928
Nicor
Description: energy company
Headquarters: Naperville
Founded In: 1953
Industry: energy supply
Tellabs
Description: American technology company
Headquarters: Naperville
Founded In: 1975
Products or Services: communication device