Jeff Quackenbush

Jeff Quackenbush covers wine, construction and real estate for the North Bay Business Journal. Before coming to the Journal in 1999, he wrote for Bay City News Service in San Francisco. He is a graduate of Walla Walla University.

A couple visiting from Australia pick up a gift at the tasting room at the Gundlach Bundschu Winery on Tuesday, Sept. 22, 2026 in Sonoma. (John Burgess/The Press Democrat)

Sonoma Valley’s Gundlach Bundschu, California’s oldest family winery, files for bankruptcy

September 23, 2026 at 2:49 p.m.

Sonoma Valley’s Gundlach Bundschu, California’s oldest continuously owned family winery, is poised to soon lose that designation under a bankruptcy restructuring that advanced this week.

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