He addresses this, actually it hasn't been a Beam family business since they quit for Prohibition. When Jim Beam started back he had 3 investors ( Phillip Blum, Homel, Jacobson) who owned it and he and family members worked for them. Schenley tried to buy it and was going to drop Blum, which didn't set well so his son Harry bought the other 2 guys out in 1941, for 1 million. Not a bad return on 10,000 dollars in 7 years!
Unfortunately, it hasn't been a family business of the Beam family since they sold it in the 1940s