Big Brothers Big Sisters relies heavily on the philanthropic support of many Trusts & Foundations. Since the beginning of 2008, these Trusts & Foundations have included:

Lord Mayor's Charitable Fund
BHP Community Giving Program
William Angliss Charitable Fund
Portland House Foundation
Fouress Foundation
Make A Difference Foundation
The Danks Trust
The Scanlon Foundation
The Bennelong Foundation
St George Foundation
Hinds-Martin Charitable Trust
Joan & Peter Clemenger Foundation
The Sentinel Foundation