Foundations and corporate grantmaking programs currently supporting Montalvo include:
- Adobe Systems Incorporated
- Air Systems Foundation, Inc.
- Alliance of Artists Communities
- American Century Investments
- Andy Warhol Foundation
- Anonymous
- Applied Materials
- AT&T Excelerator
- City of San Jose
- Comerica Bank Wealth and Institutional Management
- The Comerica Charitable Foundation
- The David and Lucile Packard Foundation
- The Intero Foundation
- The James Irvine Foundation
- J. Lohr Vineyards and Wines
- ME Fox & Company
- Mission City Community Fund
- Morgan Family Foundation
- National Endowment for the Arts
- Pruneyard Plaza Hotel
- Redwood City Industrial Saltworks, LLC
- Regal Wine Company
- Rockefeller Foundation MAP Fund
- San Mateo Credit Union
- SanDisk Corporation Fund
- Silicon Valley Community Foundation
- State Farm Insurance Companies
- Stella B. Gross Charitable Trust
- Taube Family Foundation
- Toll House
- Wells Fargo Foundation
- The William and Flora Hewlett Foundation