Tenuto Greppo is the owner of Biondi-Santi, one of Italy's most prestigious wineries, whose origins date back to the 16th century and now covers 26 hectares.

In Tuscany, Biondi-Santi is the forerunner of single-varietal wines for the Brunello di Montalcino appellation and today produces two cuvées of this appellation. Its most sought-after wine is "la Riserva", a cuvée that is not produced every year. The 2010 Riserva was one of only two wines in the world to receive a 100 rating from Wine Enthusiast magazine.