On the 23rd November 1922, Thornton & Ross was founded by Mr Nathan Thornton and Mr Phillip Ross in a rented premise in an old dye house in Colne Vale Road, Milnsbridge, Huddersfield.
By 1926, Thornton & Ross had 10 employees and purchased its first car for a company representative. The Company moved to its current premises in 1937.
During the Second World War, the company was in war work producing medicines - and had government contracts for the manufacture of large quantities of disinfectant.
The 1960s & 70s saw the rise of supermarkets, and Thornton & Ross eventually expanded distribution for Zoflora outside of pharmacies.
In 1998, Thornton & Ross celebrated its 75th Anniversary, and the Covonia Bull made its first appearance in the press, before going onto TV the following year.
In 2006, following a succesful Stage III Clinical Trial, the company launched the first licensed, non-pesticide treatment for head lice in the UK- Hedrin.
In September 2013, Thornton & Ross was sold to STADA AG, becoming part of the STADA Group, which itself was subject to a voluntary public takeover by Bain Capital and Cinven in 2017.
