The money was used to create the Mattamy Athletic Centre on the upper level of Maple Leaf Gardens.
[6] In 2013, Gilgan donated $40 million to the development of The Hospital for Sick Children Centre for Research and Learning.
[7] In 2015, Gilgan donated $5-million to Parks Foundation Calgary to be used for the development of a 138-kilometre ring of paved pathways around the city.
[8] In North Port, Florida, Mattamy donated 90 acres (36 ha) of land along with $4.7 million towards the development of the new CoolToday Park, a ballpark and spring training complex for the Atlanta Braves which opened March 24, 2019 against the Tampa Bay Rays.
[19] Mattamy was forced to release a public statement addressing the donation, and pledged to make no contributions to political advocacy groups in the future.