[1] Under the control of his two sons, John A. Dewar Jr. and Thomas "Tommy" Dewar, the brand expanded to become a global market leader by 1896 and began to win several awards, including a gold medal in the 1904 St. Louis World's Fair.

Dewar's rose to prominence in the United States when Andrew Carnegie requested a small keg of Dewar's Scotch whisky be sent to the White House for President James Garfield's inauguration.

In 1987, numerous cases of still perfect Dewar's Scotch were recovered by underwater archaeologist E. Lee Spence from the shipwreck of the SS Regina, which sank in Lake Huron in 1913.

[4] In June 2023, the brand received a major honour at the International Whisky Competition, with the "Master Blender of the Year" award being given to Stephanie Macleod.

After the blend is created, the whisky is returned to an oak cask and aged even further to obtain a smooth, robust finish.