Foundations and corporate grantmaking programs currently supporting Montalvo include:
- Alice Phelan Sullivan Corporation
- Alliance for the Advancement of Arts and Education
- Alliance of Artists Communities
- Ann and Gordon Getty Foundation
- Applied Materials Foundation
- Arts Council Silicon Valley
- Asset Management Company
- Bill Gorman Real Estate
- Boccardo Management Group LLC
- City National Bank
- Comerica Charitable Foundation
- County of Santa Clara Parks and Recreation Department's Historical Heritage Grant Program
- Del Grande Dealer Group
- ExpertQuote Insurance Services, Inc.
- Farrington Historical Foundation
- Focus Bank
- Ginn Family Foundation
- Hind Foundation
- House Family Foundation
- J. Lohr Vineyards & Wine
- JW & HM Goodman Family Charitable Foundation
- Los Gatos Morning Rotary Charitable Foundation
- Marin Community Foundation
- Morgan Family Fund
- National Endowment for the Arts
- Rotary Club of San Jose Foundation
- San Jose Business Journal
- SanDisk Corporation Fund
- Sereno Group Real Estate
- Sobrato Organization
- Symantec Corporation
- Target
- The David and Lucile Packard Foundation
- The David B. & Edward C. Goodstein Foundation
- The James Irvine Foundation
- The James Phelan Trust
- The John S. and James L. Knight Foundation
- The William and Flora Hewlett Foundation
- Trust Company of America
- U.S. Bank
- Union Bank
- University Art Center
- Wells Fargo Foundation
- Whole Foods Market, Los Gatos