The Napa Valley Vintners nonprofit trade association has been cultivating excellence since 1944 by inspiring its more than 525 members to consistently produce wines of the highest quality, to provide environmental leadership and to care for the extraordinary place they call home.hrough our signature marketing programs, industry advocacy and comprehensive member resources, we work continuously to be the voice of the Napa Valley wine industry for consumers, members of the wine trade and media outlets around the globe, and we strive to be the essential trade organization for any vintner producing Napa Valley wine in the Napa Valley.