Revenues were either provided to The Press Democrat by the companies, estimated from interviews with industry officials and competitors or extrapolated from data taken from private sector market surveys, online computer databases and various public reports on local payrolls, jobs and industry revenues. Some 1997 revenues are revised, based on updated information. For companies headquartered outside the county, only Sonoma County revenues were used. For companies headquartered in Sonoma County, companywide revenues were used. For companies OVER 26.0 LNswith a regional headquarters in Sonoma County, regional revenues were used.
Revenues are for the company's most recently completed year, whether calendar or fiscal.
Location refers to the company's Sonoma County headquarters. The number of branches includes the head office. The list was compiled using public and private documents, including state and federal reports, and personal interviews with representatives of companies doing business in Sonoma County.