J. Carter Sporting Club Limited, operating as Castore (/ˈkæstɔːr/, KAS-tor), is a British manufacturer of sportswear and athletic clothing, headquartered in Manchester, England.

[7] 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.

[8] 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.

[11] 2019 In January 2019, Castore became the official kit partner to British tennis champion Andy Murray, who also became a shareholder in the company in March of that year.

[16] In May 2020, Castore became the official kit supplier of Scottish Premiership club, Rangers on a five-year deal believed to be worth £25 million.

[22] In September 2021, it was announced that the England and Wales Cricket Board had signed a ten-year deal with Castore worth £25 million to become the official kit supplier, starting from April 2022.

[48][49][50][51] In September 2023, the kit Castore designed for Aston Villa's men's and women's team's received criticism from players due to the shirts soaking sweat, leading to them visibly changing colour, as well as becoming heavy and uncomfortable as a match went on.

[53] As well as requesting a short-term solution, Aston Villa looked to end their contract with Castore early as a result of player complaints regarding the kit.

[54] In December 2023, Castore delivered a new Aston Villa kit which they hoped would resolve the issues, however it was reported that the club still wanted to sever its multi-year contract with the brand.