- Los Angeles County Arts Commission
- Madison Initiative
- Management Systems International
- Marguerite Casey Foundation
- McKinsey & Company
- MDRC
- Media Impact Funders
- Michael & Susan Dell Foundation
- Mona Foundation
- Monitor Institute
- Monitor Institute, Deloitte
- National Council of Nonprofit Associations
- National Minority AIDS Council
- Network Impact
- New Economics Foundation (NEF)
- New Philanthropy Capital (NPC)
- New York State Health Foundation
- Nonprofit Quarterly
- Northern Rock Foundation
- OECD
