James Temerty

In 1987, Temerty founded Northland Power.

In January 2015, the Temerty Foundation gifted $5 million to the Ukrainian Catholic University (UCU) to construct a new library (the Metropolitan Andrey Sheptytsky Center); this brought the total support of the Temerty Family Foundation to the programs at the UCU to $6.2 million (which includes $1.2 million that the foundation gifted earlier to UCU to establish three departments for the study of Jewish-Ukrainian interfaith relation).

In September 2020, the Temerty Foundation gifted $250 million to the University of Toronto, naming the Temerty Faculty of Medicine and representing the single largest one-time donation in Canadian history at the time of the announcement. In April 2020, $10-million of the gift to Faculty of Medicine's Dean's COVID-19 Priorities Fund, which was advanced and pre-announced to support front-line clinical faculty members and trainees fighting the COVID-19 pandemic.

In December 2022, apparently he donated $1.000.000 to #LightUpUkraine | UNITED 24 raising funds for 1000 generators to power Ukrainian hospitals.

In May 2025, the Royal Ontario Museum announced a $30-million endowment gift from the Temerty Foundation. The Temerty Community Access and Engagement Fund will fund new programs in the museum's galleries and public spaces, providing greater access by reducing barriers to entry.