18 (new) William Jackson & Son

william jackson

Formed: 1952

Sales: £268.5m

2yr CAGR: 22.3%

Owned by: The Jackson family

How? After buying organic veg box business Abel & Cole in 2012, growth at William Jackson (which also owns Aunt Bessie’s and MyFresh) has slowed to 17.5% y-o-y, but pre-tax profits were up an impressive 22% to £15.4m in the year to April 2014.

Slower-growing Fast 50 is hungry for new challengers