Sales at Glenfiddich maker William Grant & Sons have topped £1bn for the first time.

The Scotch distiller maker generated sales of £1.05bn, up 9% on the previous year, but saw its operating profits slip to £126.3m for 2011, down from £132.4m for the year before.

Sales of Glenfiddich single malt topped one million cases and Grant’s grew to more than five million cases.

In a statement today, the company said it continued to invest behind its innovation brands, including Hudson Baby Bourbon, Monkey Shoulder and Reyka vodka. Its premium Tequila brand Milagro was performing well in its core markets of the US and Mexico, the company said.

Its other brands include Hendrick’s Gin, Balvenie Single Malt, Sailor Jerry rum and Tullamore Dew Irish whiskey, acquired in 2010.

“While 2011 saw some tough global economic conditions, the company performed well thanks to the continued success of our premium spirits brands and our consistent focus on building brand equity, improving our route to market and investing for the long-term,” said chief executive Stella David.