From the website: https://ptct.org.uk/about-us/ page
Partick Thistle Charitable Trust
Works as an independent charity established in July 2011 to use the Partick Thistle name to engage, support and empower our communities through the promotion of health and well-being, football, education, citizenship and inclusion, primarily within our local community.
Partick Thistle Charitable Trust is a charity (SC042480) registered in Scotland
... So it is a charity