A historic and once-famous Livermore winery, Concannon was bought and sold several times in the 1980's by large conglomerates that were purchasing each other. Each sale resulted in a loss of focus, and the brand suffered. In 1992 Eric Wente of Wente Vineyards saved it from the jaws of destruction by assembling a group of eight investors to buy the winery. However, Concannon Vineyard is a totally separate company in both ownership and operation from Wente Vineyards.