Cambridge Investment Research Inc., » Business Connections Go back to directory. Add to Address Book. Cambridge Investment Research Inc., Cambridge Investment Research Inc., Work 6083 E. Grant/Old Farm Tucson AZ 85712-2319 work Work Phone: (520) 721-9550work Connections Business Directory | Leaflet | Wikimedia 6083 E. Grant/Old Farm Tucson AZ 85712-2319Get Directions