Sebastopol, Calif.—The investment firm J.W. Childs Associates has acquired The Vincraft Group’s majority stake in Kosta Browne Wines. J.W. Childs is a private equity firm based in Boston that has invested more than $3 billion since its founding in 1995. Vincraft made its investment in Kosta Browne in 2009 and that deal funded the construction of a winery and the purchase of the company’s first estate vineyard; the 20-acre Keefer Ranch property. John Childs is the majority investor in CIRQ Estate winery, which Michael Browne founded in 2008, and that company will also be part of the new partnership, according to a statement released by the winery. “We are very grateful for Vincraft’s stewardship over the last five years,” says founder Dan Kosta. “Today, we have an incredible opportunity to continue elevating the quality of our wines and our brand.”