Siblyback Lake is owned by South West Water, the company created in 1989 with the privatisation of the water industry. South West Water lease the lake on a five year rolling lease to South West Lakes Trust which is a company limited by guarantee (registered in England number 3946529) and also a Registered Charity No. 1079966. The trust oversees Roadford Lake, Siblyback, Stithians, Tamar Lakes and Wimbleball from their Head Office at Roadford Lake. They in turn use a subsidiary trading company called South West Lakes Limited (company number 03955075) to run the Outdoor and Active Centres and Camping at their various lakes. Any excess funds in this trading company are then Gift Aided back to the South West Lakes Trust in a curious tax efficient money-go-round. For the year ended 31st January 2018 South West Lakes Limited made a trading profit of £99,282.