Calon-Ségur was bought by Georges Gasqueton and his uncle, Charles Hanappier in 1894. It remained in the family with Philippe Capbern Gasqueton as administrator until 2012.
During the 1940s and 50s the estate's reputation soared. It is the most northerly in St-Estèphe and maintains its standing.Today, Château Calon Ségur is owned by the Suravenir company, subsidiary of the banking group Crédit Mutuel Arkéa headed by Jean-Pierre Denis. The insurance company joined forces with the Videlot group.