Company lists · Data refreshed September 2026

Top 25 Primate conservation organizations based in the United States

Name: Primate conservation organizations 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 217 companies tracked

RevenueBase identified 217 primate conservation organizations headquartered in the United States as of September 2026 and tracks 17,103 professional contacts across them, including 5,012 with verified work emails. Washington is the largest hub.

This list covers primate conservation organizations 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

217Companies

17,103Contacts tracked

5,012Verified emails

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The 25 largest primate conservation organizations based in the United States

Ranked by team size

Top 25 of 217 primate conservation organizations 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 primate conservation organizations: 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	The Nature Conservancy	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	5,001-10,000	6,526 contacts →
	Indirect evidence “Air, water, food, shelter, income: nature sustains every aspect of our lives.” Source: RevenueBase Database · checked Sep 20, 2026
2	Wildlife Conservation Society	Indirect evidence	Bronx, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,663 contacts →
	Indirect evidence “WCS stands for wildlife and wild places.” Source: RevenueBase Database · checked Sep 20, 2026
3	World Wildlife Fund	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,290 contacts →
	Partial evidence “Our planet faces many big conservation challenges.” Source: RevenueBase Database · checked Sep 20, 2026
4	National Wildlife Federation	Partial evidence	Reston, VA, United StatesHQ checked Sep 20, 2026	201-500	585 contacts →
	Partial evidence “As America's largest non-profit conservation organization, the National Wildlife Federation works closely with those who span the social and political spectrum, but who are…” Source: RevenueBase Database · checked Sep 20, 2026
5	IFAW	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	355 contacts →
	Indirect evidence “IFAW explores new ways to improve conditions for animals, people, and the place we call home-and we’ve been leading the way for over 50 years.” Source: RevenueBase Database · checked Sep 20, 2026
6	The Jane Goodall Institute	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	232 contacts →
	Partial evidence “The Jane Goodall Institute is a global, community-led conservation organization founded in 1977 that advances the vision and work of Dr.” Source: RevenueBase Database · checked Sep 20, 2026
7	Center For Biological Diversity	Indirect evidence	Tucson, AZ, United StatesHQ checked Sep 20, 2026	51-200	219 contacts →
	Indirect evidence “At the Center for Biological Diversity, we believe that the welfare of human beings is deeply linked to nature, to the existence in our world of a vast diversity of wild animals…” Source: RevenueBase Database · checked Sep 20, 2026
8	Wildlife Works	Partial evidence	Mill Valley, CA, United StatesHQ checked Sep 20, 2026	201-500	188 contacts →
	Partial evidence “Wildlife Works is a community-centered wildlife conservation company that implements market-based initiatives to protect the planet’s threatened wilderness and endangered wildlife.” Source: RevenueBase Database · checked Sep 20, 2026
9	Mongabay	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 20, 2026	51-200	152 contacts →
	Indirect evidence “Mongabay.com publishes news and information on tropical forests and related topics.” Source: RevenueBase Database · checked Sep 20, 2026
10	Wildaid	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	11-50	99 contacts →
	Indirect evidence “Our mission is to protect wildlife and vital habitats from the illegal wildlife trade, the effects of climate change, and more.” Source: RevenueBase Database · checked Sep 20, 2026
11	Dian Fossey Gorilla Fund	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	51-200	97 contacts →
	Partial evidence “The Dian Fossey Gorilla Fund is the world's largest and longest-running organization fully dedicated to gorilla conservation.” Source: RevenueBase Database · checked Sep 20, 2026
12	Fossil RIM Wildlife Center	Partial evidence	Glen Rose, TX, United StatesHQ checked Sep 20, 2026	51-200	84 contacts →
	Partial evidence “Fossil Rim Wildlife Center is dedicated to the conservation of species in peril, conducting scientific research, training of professionals.” Source: RevenueBase Database · checked Sep 20, 2026
13	Society For Conservation Biology	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	11-50	70 contacts →
	Partial evidence “For almost 35 years, the Society for Conservation Biology (SCB) has proudly served as the premier international organization of professionals and students who dedicate their work…” Source: RevenueBase Database · checked Sep 20, 2026
14	Wildlife Conservation Network	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	11-50	68 contacts →
	Partial evidence “Founded in 2002, Wildlife Conservation Network (WCN) is dedicated to protecting endangered species and preserving their natural habitats.” Source: RevenueBase Database · checked Sep 20, 2026
15	Natureserve	Partial evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	51-200	64 contacts →
	Partial evidence “NatureServe, a non-profit organization, provides high-quality scientific expertise for conservation.” Source: RevenueBase Database · checked Sep 20, 2026
16	Wildlife Alliance	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	57 contacts →
	Indirect evidence “Wildlife Alliance’s mission: direct protection for forests and wildlife.” Source: RevenueBase Database · checked Sep 20, 2026
17	Rainforest Trust	Indirect evidence	Warrenton, VA, United StatesHQ checked Sep 20, 2026	11-50	53 contacts →
	Indirect evidence “For more than 35 years, Rainforest Trust has not wavered from its mission of preventing deforestation, preserving critical habitat and safeguarding endangered species.” Source: RevenueBase Database · checked Sep 20, 2026
18	BIG Life Foundation	Partial evidence	Ridgefield, WA, United StatesHQ checked Sep 20, 2026	n/a	51 contacts →
	Partial evidence “Using innovative conservation strategies and collaborating closely with local communities, partner NGOs, national parks, and government agencies, Big Life seeks to protect and…” Source: RevenueBase Database · checked Sep 20, 2026
19	Amazon Conservation	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	50 contacts →
	Partial evidence “Amazon Conservation is a 501(c)(3) non-profit organization that unites science, innovation, and community to protect the western Amazon - the greatest wild forest on Earth.” Source: RevenueBase Database · checked Sep 20, 2026
20	Conservation Nation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	n/a	39 contacts →
	Indirect evidence “In the fight to save endangered animals and the planet, we need every smart voice and solution at the table.” Source: RevenueBase Database · checked Sep 20, 2026
21	In Defense Of Animals	Indirect evidence	San Rafael, CA, United StatesHQ checked Sep 20, 2026	11-50	38 contacts →
	Indirect evidence “In Defense of Animals is an international animal protection organization with over valued supporters and a 30-year history of protecting animals, people and the environment…” Source: RevenueBase Database · checked Sep 20, 2026
22	Zoological Wildlife Foundation	Indirect evidence	Miami, FL, United StatesHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “Zoological Wildlife Foundation is an organization dedicated to educating the public about rare and endangered animal species in captivity and in the wild.” Source: RevenueBase Database · checked Sep 20, 2026
23	Arcus Foundation	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	11-50	36 contacts →
	Partial evidence “The Arcus Foundation is a leading global foundation advancing pressing social justice and conservation issues.” Source: RevenueBase Database · checked Sep 20, 2026
24	Vermont Center For Ecostudies	Partial evidence	White River Junction, VT, United StatesHQ checked Sep 20, 2026	11-50	34 contacts →
	Partial evidence “The Vermont Center for Ecostudies advances biodiversity conservation through research, monitoring, and community engagement.” Source: RevenueBase Database · checked Sep 20, 2026
25	Amphibian Foundation	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	51-200	31 contacts →
	Indirect evidence “Creating and implementing lasting solutions tot he global amphibian extinction crisis.” 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: primate conservation organizations. 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 primate conservation organizations.
Partial evidence: Its own public description names part of primate conservation organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name primate conservation organizations. 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 217 primate conservation organizations based in the United States

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Primate conservation organizations based in the United States at a glance

As of Sep 20, 2026

29.3%Verified-email coverage

78.8Average contacts per company

1-10Median size (employees)

6.5%Largest-city concentration · Washington

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

144

11-50

51-200

201-500

1,001-5,000

5,001-10,000

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 217 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 primate conservation organizations, 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 “primate conservation organizations”. 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 primate conservation organizations), 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 primate conservation organizations, 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, 5,012 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.

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 primate conservation organizations, 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 primate conservation organizations are there based in the United States?

RevenueBase identified 217 primate conservation organizations 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?

The Nature Conservancy, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most primate conservation organizations?

Washington leads with 14 headquartered companies, followed by New York (9) and San Francisco (7).

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 5,012 verified decision-maker contacts tracked across these 217 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.