Company lists · Data refreshed September 2026

Top 25 Nonprofit foundations based in the United States

Name: Nonprofit foundations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,400 companies tracked

RevenueBase identified 1,400 nonprofit foundations headquartered in the United States as of September 2026 and tracks 14,424 professional contacts across them, including 5,653 with verified work emails. New York is the largest hub.

This list covers nonprofit foundations headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

1,400Companies

14,424Contacts tracked

5,653Verified emails

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The 25 largest nonprofit foundations based in the United States

Ranked by team size

Top 25 of 1,400 nonprofit foundations based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to nonprofit foundations: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Stand Together	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	1,001-5,000	742 contacts →
	Indirect evidence “Stand Together is a philanthropic community that helps America’s boldest changemakers tackle the root causes of our country’s biggest problems.” Source: RevenueBase Database · checked Sep 20, 2026
2	Bloomberg Philanthropies	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	410 contacts →
	Indirect evidence “Bloomberg Philanthropies works primarily to advance five areas globally: the Arts, Education, the Environment, Government Innovation and Public Health.” Source: RevenueBase Database · checked Sep 20, 2026
3	W.K. Kellogg Foundation	Indirect evidence	Battle Creek, MI, United StatesHQ checked Sep 20, 2026	201-500	319 contacts →
	Indirect evidence “The W.K.” Source: RevenueBase Database · checked Sep 20, 2026
4	Foundation Source	Partial evidence	Fairfield, CT, United StatesHQ checked Sep 20, 2026	201-500	268 contacts →
	Partial evidence “As the nation’s largest provider of foundation management services, we’re a trusted source for philanthropic expertise.” Source: RevenueBase Database · checked Sep 20, 2026
5	Conrad N. Hilton Foundation	Indirect evidence	Westlake Village, CA, United StatesHQ checked Sep 20, 2026	51-200	207 contacts →
	Indirect evidence “The Conrad N.” Source: RevenueBase Database · checked Sep 20, 2026
6	The David And Lucile Packard Foundation	Partial evidence	Los Altos, CA, United StatesHQ checked Sep 20, 2026	51-200	194 contacts →
	Partial evidence “The David and Lucile Packard Foundation is a family foundation guided by the enduring business philosophy and personal values of Lucile and David, who helped found one of the…” Source: RevenueBase Database · checked Sep 20, 2026
7	FES	Strong evidence	Lincoln, NE, United StatesHQ checked Sep 20, 2026	51-200	181 contacts →
	Strong evidence “FES is a nonprofit foundation that provides support to communities and nonprofit organizations so they can focus on fulfilling their missions.” Source: RevenueBase Database · checked Sep 20, 2026
8	Michael & Susan Dell Foundation	Partial evidence	Austin, TX, United StatesHQ checked Sep 20, 2026	51-200	179 contacts →
	Partial evidence “The Michael & Susan Dell Foundation (dell.org) builds pathways that change lives for people and communities around the world.” Source: RevenueBase Database · checked Sep 20, 2026
9	UP With People Foundation	Partial evidence	Denver, United StatesHQ checked Sep 20, 2026	n/a	175 contacts →
	Partial evidence “The Up with People Foundation carries forward a global legacy that began in 1965 with a bold idea that young people, when empowered, can be a force for good in the world.” Source: RevenueBase Database · checked Sep 20, 2026
10	Global Impact	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	170 contacts →
	Partial evidence “Global Impact serves as a trusted philanthropy advisor, intermediary, and nonprofit partner for greater giving.” Source: RevenueBase Database · checked Sep 20, 2026
11	Communities Foundation Of Texas	Partial evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	51-200	156 contacts →
	Partial evidence “Communities Foundation of Texas has been a partner with donors for raising the quality of life in our community for more than 60 years.” Source: RevenueBase Database · checked Sep 20, 2026
12	The Oregon Community Foundation	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	51-200	150 contacts →
	Partial evidence “The mission of Oregon Community Foundation is to improve lives for all Oregonians through the power of philanthropy.” Source: RevenueBase Database · checked Sep 20, 2026
13	Silicon Valley Community Foundation	Partial evidence	Mountain View, CA, United StatesHQ checked Sep 20, 2026	51-200	149 contacts →
	Partial evidence “Silicon Valley Community Foundation advances innovative philanthropic solutions to challenging problems.” Source: RevenueBase Database · checked Sep 20, 2026
14	The Kresge Foundation	Partial evidence	Troy, MI, United StatesHQ checked Sep 20, 2026	51-200	144 contacts →
	Partial evidence “The Kresge Foundation was founded in 1924 to promote human progress.” Source: RevenueBase Database · checked Sep 20, 2026
15	Skoll Foundation	Partial evidence	Washington, CA, United StatesHQ checked Sep 20, 2026	11-50	138 contacts →
	Partial evidence “The Skoll Foundation seeks to catalyze transformational social change by investing in, connecting, and championing social entrepreneurs and other social innovators who together…” Source: RevenueBase Database · checked Sep 20, 2026
16	Amphil	Strong evidence	Oak Park, IL, United StatesHQ checked Sep 20, 2026	51-200	136 contacts →
	Strong evidence “AmPhil exists to promote the art of civil association by helping philanthropists, charitable foundations, and nonprofit organizations grow and flourish through practical guidance…” Source: RevenueBase Database · checked Sep 20, 2026
17	Rockefeller Philanthropy Advisors	Indirect evidence	New York, CA, United StatesHQ checked Sep 20, 2026	51-200	136 contacts →
	Indirect evidence “Rockefeller Philanthropy Advisors (RPA) accelerates philanthropy in pursuit of a just world.” Source: RevenueBase Database · checked Sep 20, 2026
18	Wireless Zone Foundation For Giving	Partial evidence	CT, United StatesHQ checked Sep 20, 2026	11-50	125 contacts →
	Partial evidence “The Wireless Zone Foundation for Giving® is a large part of what sets Wireless Zone® apart from our competition.” Source: RevenueBase Database · checked Sep 20, 2026
19	Mott Foundation	Partial evidence	Flint, MI, United StatesHQ checked Sep 20, 2026	51-200	123 contacts →
	Partial evidence “Automotive pioneer Charles Stewart Mott established the private charitable foundation that bears his name in 1926 in Flint, Michigan.” Source: RevenueBase Database · checked Sep 20, 2026
20	Doris Duke Foundation	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	113 contacts →
	Partial evidence “The mission of the Doris Duke Foundation (DDF) is to build a more creative, equitable and sustainable future by investing in artists and the performing arts, environmental…” Source: RevenueBase Database · checked Sep 20, 2026
21	Firstday Foundation	Strong evidence	San Antonio, TX, United StatesHQ checked Sep 20, 2026	51-200	112 contacts →
	Strong evidence “FirstDay Foundation is a charitable foundation created to provide philanthropic grants, management and governance services to nonprofit organizations doing good work in local…” Source: RevenueBase Database · checked Sep 20, 2026
22	Foundation For The Carolinas	Strong evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	51-200	106 contacts →
	Strong evidence “Remarkable impact is the heart of Foundation For The Carolinas’ mission – and the driving force behind our mission is the collective impact of thousands of nonprofits, families…” Source: RevenueBase Database · checked Sep 20, 2026
23	The Helmsley Charitable Trust	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	104 contacts →
	Indirect evidence “The Leona M.” Source: RevenueBase Database · checked Sep 20, 2026
24	Leesburg Regional Medical Center Foundation	Partial evidence	Leesburg, FL, United StatesHQ checked Sep 20, 2026	n/a	85 contacts →
	Partial evidence “Since 1977, the Leesburg Regional Medical Center Foundation has supported the Hospital's high-quality medical services, programs and growing needs.” Source: RevenueBase Database · checked Sep 20, 2026
25	Marin Community Foundation	Partial evidence	Novato, CA, United StatesHQ checked Sep 20, 2026	51-200	84 contacts →
	Partial evidence “Marin Community Foundation is a leading philanthropic organization that mobilizes the power of community and the resources of philanthropy to advance equity for people, places…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: nonprofit foundations. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names nonprofit foundations.
Partial evidence: Its own public description names part of nonprofit foundations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nonprofit foundations. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,400 nonprofit foundations based in the United States

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Nonprofit foundations based in the United States at a glance

As of Sep 20, 2026

39.2%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,093

11-50

210

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,400 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among nonprofit foundations, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “nonprofit foundations”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names nonprofit foundations), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among nonprofit foundations, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 5,653 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Nonprofit foundations by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names nonprofit foundations, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many nonprofit foundations are there based in the United States?

RevenueBase identified 1,400 nonprofit foundations headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Stand Together, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most nonprofit foundations?

New York leads with 55 headquartered companies, followed by Los Angeles (25) and Chicago (22).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,653 verified decision-maker contacts tracked across these 1,400 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.