2015 NorthBay biz 500 by Norman Rosinski· March 17, 2015 12:00 am·Rank CompanyName Revenues (Millions) Website 1 Fireman’s Fund Insurance Co. 5,700 www.firemansfund.com 2 Keysight Technologies 2,900 www.keysight.com 3 Medtronic Vascular…