Company lists · Data refreshed September 2026

Top 25 Impact investing companies based in the United States

Name: Impact investing companies 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 667 companies tracked

RevenueBase identified 667 impact investing companies headquartered in the United States as of September 2026 and tracks 6,888 professional contacts across them, including 3,135 with verified work emails. New York is the largest hub.

This list covers impact investing companies 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

667Companies

6,888Contacts tracked

3,135Verified emails

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The 25 largest impact investing companies based in the United States

Ranked by team size

Top 25 of 667 impact investing companies 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 impact investing companies: 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	Allspring Global Investments	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,101 contacts →
	Partial evidence “Allspring is welcoming a new era of investing that pursues both financial returns and positive outcomes.” Source: RevenueBase Database · checked Sep 20, 2026
2	Advantage Capital	Partial evidence	New Orleans, LA, United StatesHQ checked Sep 20, 2026	51-200	245 contacts →
	Partial evidence “Advantage Capital is an impact investment firm with an emphasis on driving capital to underserved areas – often in partnership with the public sector.” Source: RevenueBase Database · checked Sep 20, 2026
3	The Vistria Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	147 contacts →
	Partial evidence “The Vistria Group is building a new kind of private investment firm that seeks to deliver both financial returns and societal impact.” Source: RevenueBase Database · checked Sep 20, 2026
4	REDF	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	110 contacts →
	Indirect evidence “For 25 years, REDF has invested in businesses that reveal and reinforce the talent of people overcoming barriers to employment.” Source: RevenueBase Database · checked Sep 20, 2026
5	The Global Impact Investing Network	Strong evidence	New York, NY, United StatesHQ checked Sep 20, 2026	11-50	95 contacts →
	Strong evidence “The Global Impact Investing Network, Inc.(GIIN) is the leading industry body for impact investing.” Source: RevenueBase Database · checked Sep 20, 2026
6	Parnassus Investments	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	93 contacts →
	Indirect evidence “Since 1984, Parnassus Investments has invested differently.” Source: RevenueBase Database · checked Sep 20, 2026
7	SEAF	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	85 contacts →
	Partial evidence “Small Enterprise Assistance Funds (SEAF) is a global impact private equity manager focused on providing growth capital and operational support to small and medium-sized…” Source: RevenueBase Database · checked Sep 20, 2026
8	Calvert Research And Management	Partial evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	51-200	79 contacts →
	Partial evidence “Calvert Research and Management is a leader in Responsible Investing.” Source: RevenueBase Database · checked Sep 20, 2026
9	Trillium Asset Management	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	11-50	77 contacts →
	Indirect evidence “Trillium Asset Management offers investment strategies and services that seek to advance humankind towards a global sustainable economy, a just society, and a better world.” Source: RevenueBase Database · checked Sep 20, 2026
10	Social Investment Managers & Advisors Sima Funds	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	69 contacts →
	Partial evidence “SIMA Funds is a pioneering impact investment firm and social asset manager dedicated to transforming lives at the Bottom of the Pyramid (BoP).” Source: RevenueBase Database · checked Sep 20, 2026
11	ICA Fund	Strong evidence	Oakland, CA, United StatesHQ checked Sep 20, 2026	11-50	64 contacts →
	Strong evidence “ICA Fund’s impact investing practice creates pathways for businesses to grow through active partnership, personalized advising, and flexible capital.” Source: RevenueBase Database · checked Sep 20, 2026
12	Elemental Impact	Strong evidence	Honolulu, HI, United StatesHQ checked Sep 20, 2026	51-200	62 contacts →
	Strong evidence “Elemental Impact is a nonprofit investing platform with 15 years of experience advancing innovative technology that creates lasting economic and climate benefits across…” Source: RevenueBase Database · checked Sep 20, 2026
13	Impactassets	Strong evidence	Bethesda, MD, United StatesHQ checked Sep 20, 2026	51-200	61 contacts →
	Strong evidence “ImpactAssets is an impact investing trailblazer, dedicated to changing the trajectory of our planet’s future and improving the lives of all people.” Source: RevenueBase Database · checked Sep 20, 2026
14	Calvert Impact	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 20, 2026	11-50	58 contacts →
	Partial evidence “Calvert Impact is a global impact investment firm that helps everyday investors and financial professionals invest in solutions that benefit people and the planet.” Source: RevenueBase Database · checked Sep 20, 2026
15	GEF Capital Partners	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 20, 2026	11-50	55 contacts →
	Indirect evidence “GEF Capital Partners was formed in March 2018 following the completion of a collaborative spinoff from Global Environment Fund, a pioneer in global sustainability and…” Source: RevenueBase Database · checked Sep 20, 2026
16	Capricorn Investment Group	Indirect evidence	Palo Alto, CA, United StatesHQ checked Sep 20, 2026	11-50	54 contacts →
	Indirect evidence “One of the largest mission-aligned firms in the world, Capricorn Investment Group was born from a belief that sustainable investment practices can enhance risk-adjusted returns.” Source: RevenueBase Database · checked Sep 20, 2026
17	Sandbox Industries	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	11-50	52 contacts →
	Indirect evidence “Sandbox Industries fosters innovation to drive lasting change in industries that are crucial to our future: healthcare, insurance and sustainability.” Source: RevenueBase Database · checked Sep 20, 2026
18	Global Partnerships	Partial evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	11-50	50 contacts →
	Partial evidence “Global Partnerships is an impact-first investor dedicated to expanding opportunity for people living in poverty.” Source: RevenueBase Database · checked Sep 20, 2026
19	E8 Angels	Partial evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	n/a	50 contacts →
	Partial evidence “E8 is a membership community of 150+ investors dedicated to funding high-impact cleantech companies.” Source: RevenueBase Database · checked Sep 20, 2026
20	Sunwealth	Indirect evidence	Cambridge, MA, United StatesHQ checked Sep 20, 2026	11-50	47 contacts →
	Indirect evidence “Sunwealth’s mission is to invest in the future of energy, generating financial, social and environmental returns for investors and communities.” Source: RevenueBase Database · checked Sep 20, 2026
21	RRG Capital Management RRG	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	51-200	47 contacts →
	Indirect evidence “RRG Capital Management LLC, a Renewable Resources Group LLC company,(collectively, “RRG”) strives to create value for investors and partners in the sustainable agriculture, food…” Source: RevenueBase Database · checked Sep 20, 2026
22	Arctaris Impact Investors	Partial evidence	Chestnut Hill, MA, United StatesHQ checked Sep 20, 2026	11-50	41 contacts →
	Partial evidence “Arctaris Impact Investors, LLC is a Boston-based impact investment firm with experience spanning more than 17 years and eight funds, with both debt and equity investments.” Source: RevenueBase Database · checked Sep 20, 2026
23	Bridgeway Capital Management	Indirect evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	11-50	39 contacts →
	Indirect evidence “We believe principles are the foundation of prosperity.” Source: RevenueBase Database · checked Sep 20, 2026
24	Sapa Investment Group	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 20, 2026	51-200	39 contacts →
	Indirect evidence “SAPA is an economic development company that builds thriving communities by providing sustainable food, affordable housing, alternative health and wellness, unique musical and…” Source: RevenueBase Database · checked Sep 20, 2026
25	Windquest Group	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “Windquest Group is a Michigan-based, privately held enterprise and investment management firm with diversified projects in performance technology, sustainability solutions…” 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: impact investing companies. 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 impact investing companies.
Partial evidence: Its own public description names part of impact investing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name impact investing companies. 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 667 impact investing companies based in the United States

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Impact investing companies based in the United States at a glance

As of Sep 20, 2026

45.5%Verified-email coverage

10.3Average contacts per company

1-10Median size (employees)

13.0%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

470

11-50

159

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 667 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 impact investing companies, 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 “impact investing companies”. 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 impact investing companies), 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 impact investing companies, 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, 3,135 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.

Impact investing companies 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 impact investing companies, 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 impact investing companies are there based in the United States?

RevenueBase identified 667 impact investing companies 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?

Allspring Global Investments, headquartered in Charlotte, tops this list with the largest team on record.

Which city has the most impact investing companies?

New York leads with 87 headquartered companies, followed by San Francisco (44) and Los Angeles (25).

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 3,135 verified decision-maker contacts tracked across these 667 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.