The answer to this question is not as obvious as it may seem, but here is the Chairman of one of the largest Burgundy houses answering that very question.
Maison Louis Jadot was founded by Louis Henry Denis Jadot in 1859 and is a family wine company that produces and markets Burgundy wine. It operates both its own vineyards and also buys grapes from many growers. It controls 270 hectares (670 acres) of vineyards in Burgundy (including Beaujolais Crus) and produces only AOC wines.
In 1985 the company was sold to the family of Rudy Kopf, who also own Kobrand, Jadot’s US importer.