J. Carter Sporting Club Limited (operating as Castore) is a British manufacturer of sportswear and athletic clothing, headquartered in Manchester, England. The company's products are sold in more than 50 countries worldwide and have sponsorship deals with association football teams, cricket teams, rugby union teams, Formula One teams, and tennis players.
The company was founded in 2015 by brothers Thomas (born September 1989) and Philip Beahon (born November 1992) when they were 25 and 22 years old respectively. Tom had been a professional youth football player for Tranmere Rovers between the ages of 17 and 21 before spending time at Jerez Industrial in Spain and attending the Glenn Hoddle Academy. Phil played semi-professional cricket for Cheshire and Lancashire cricket clubs.
The pair left their playing careers in 2013 and moved to London to work in finance in an effort to raise money for their sportswear venture; Tom worked at Lloyds Bank and Phil for Deloitte. During their time in London they began their market research by interviewing patrons of high-end gymnasiums and signing up a number of prolific investors from the fashion and sporting industries. Castore launched online in 2016. In 2019 Forbes listed the pair in their "30 Under 30" list.