Company lists · Data refreshed September 2026

Top 25 Impact investment firms based in the United States

Name: Impact investment firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 925 companies tracked

RevenueBase identified 925 impact investment firms headquartered in the United States as of September 2026 and tracks 9,053 professional contacts across them, including 3,902 with verified work emails and 3,929 with mobile numbers. New York is the largest hub.

This list covers impact investment firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

925Companies

9,053Contacts tracked

3,902Verified emails

3,929Mobile numbers

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The 25 largest impact investment firms based in the United States

Ranked by team size

Top 25 of 925 impact investment firms based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names impact investment firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Allspring Global InvestmentsIndirect evidence	Charlotte, NC, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,106
	“Allspring is welcoming a new era of investing that pursues both financial returns and positive outcomes.” Source: company website · checked Sep 3, 2026
2	Tiger GlobalPartial evidence	New York, NY, United StatesHQ checked Sep 3, 2026	51-200	281
	“Tiger Global is a research-driven investment firm pursuing a long-term approach to partnering with high-quality, innovative companies across different stages of their lifecycle.” Source: company website · checked Sep 3, 2026
3	Advantage CapitalStrong evidence	New Orleans, CA, United StatesHQ checked Sep 3, 2026	51-200	240
	“Advantage Capital is an impact investment firm with an emphasis on driving capital to underserved areas – often in partnership with the public sector.” Source: company website · checked Sep 3, 2026
4	The Vistria GroupStrong evidence	Chicago, IL, United StatesHQ checked Sep 3, 2026	51-200	146
	“The Vistria Group is building a new kind of private investment firm that seeks to deliver both financial returns and societal impact.” Source: company website · checked Sep 3, 2026
5	REDFIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 3, 2026	51-200	111
	“For 25 years, REDF has invested in businesses that reveal and reinforce the talent of people overcoming barriers to employment.” Source: company website · checked Sep 3, 2026
6	AXA Investment ManagersPartial evidence	New York City, NY, United StatesHQ checked Sep 3, 2026	10001+	106
	“Equity and Fixed Income Products Sustainable investments (ESG) Alternative assets (e.g.” Source: company website · checked Sep 3, 2026
7	Parnassus InvestmentsPartial evidence	San Francisco, CA, United StatesHQ checked Sep 3, 2026	51-200	98
	“Since 1984, Parnassus Investments has invested differently.” Source: company website · checked Sep 3, 2026
8	The Global Impact Investing NetworkPartial evidence	New York, NY, United StatesHQ checked Sep 3, 2026	11-50	91
	“The Global Impact Investing Network, Inc.(GIIN) is the leading industry body for impact investing.” Source: company website · checked Sep 3, 2026
9	DelphosIndirect evidence	Washington, DC, United StatesHQ checked Sep 3, 2026	51-200	87
	“At Delphos, we believe that progress and sustainability drive everyone’s aspirations, regardless of geography, religion or ethnicity.” Source: company website · checked Sep 3, 2026
10	SEAFPartial evidence	Washington, DC, United StatesHQ checked Sep 3, 2026	51-200	83
	“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: company website · checked Sep 3, 2026
11	Calvert Research And ManagementIndirect evidence	Washington, DC, United StatesHQ checked Sep 3, 2026	51-200	77
	“Calvert Research and Management is a leader in Responsible Investing.” Source: company website · checked Sep 3, 2026
12	Trillium Asset ManagementPartial evidence	Boston, CA, United StatesHQ checked Sep 3, 2026	11-50	76
	“Trillium Asset Management offers investment strategies and services that advance humankind towards a global sustainable economy, a just society, and a better world.” Source: company website · checked Sep 3, 2026
13	Social Investment Managers & Advisors Sima FundsStrong evidence	New York, NY, United StatesHQ checked Sep 3, 2026	51-200	68
	“SIMA Funds is a pioneering impact investment firm and social asset manager dedicated to transforming lives at the Bottom of the Pyramid (BoP).” Source: company website · checked Sep 3, 2026
14	Rising Realty PartnersPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 3, 2026	11-50	66
	“Rising Realty Partners is a Los Angeles-based real estate investment and operating firm, focused on acquiring, developing, and managing world-class commercial properties across…” Source: company website · checked Sep 3, 2026
15	CultivoPartial evidence	Berkeley, CA, United StatesHQ checked Sep 3, 2026	11-50	63
	“Cultivo accelerates investment into nature at scale.” Source: company website · checked Sep 3, 2026
16	Tuck AdvisorsIndirect evidence	New Hope, PA, United StatesHQ checked Sep 3, 2026	11-50	63
	“Our firm was founded by serial entrepreneurs who believe founder-CEOs deserve better M&A support.” Source: company website · checked Sep 3, 2026
17	ICA FundPartial evidence	West Oakland, CA, United StatesHQ checked Sep 3, 2026	11-50	62
	“ICA Fund’s impact investing practice creates pathways for businesses to grow through active partnership, personalized advising, and flexible capital.” Source: company website · checked Sep 3, 2026
18	Grassroots Business FundIndirect evidence	Washington, DC, United StatesHQ checked Sep 3, 2026	11-50	61
	“Grassroots Business Fund (GBF) strives to create a world where economic opportunity reaches everyone, growing viable businesses that generate sustainable earnings or savings for…” Source: company website · checked Sep 3, 2026
19	ImpactassetsPartial evidence	Bethesda, MD, United StatesHQ checked Sep 3, 2026	51-200	60
	“ImpactAssets is an impact investing trailblazer, dedicated to changing the trajectory of our planet’s future and improving the lives of all people.” Source: company website · checked Sep 3, 2026
20	The Cashmere FundIndirect evidence	Boulder, CO, United StatesHQ checked Sep 3, 2026	n/a	60
	“The Cashmere Fund invests in companies we believe can benefit from influence to grow faster than their competitors.” Source: company website · checked Sep 3, 2026
21	Calvert ImpactStrong evidence	Bethesda, MD, United StatesHQ checked Sep 3, 2026	11-50	58
	“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: company website · checked Sep 3, 2026
22	RSF Regenerative Social FinanceIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 3, 2026	11-50	58
	“RSF’s mission is to change finance and finance change.” Source: company website · checked Sep 3, 2026
23	Capricorn Investment GroupPartial evidence	Palo Alto, NY, United StatesHQ checked Sep 3, 2026	11-50	53
	“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: company website · checked Sep 3, 2026
24	Sandbox IndustriesIndirect evidence	Chicago, IL, United StatesHQ checked Sep 3, 2026	11-50	51
	“Sandbox Industries fosters innovation to drive lasting change in industries that are crucial to our future: healthcare, insurance and sustainability.” Source: company website · checked Sep 3, 2026
25	E8 AngelsPartial evidence	Seattle, WA, United StatesHQ checked Sep 3, 2026	n/a	49
	“E8 is a nonprofit membership community of over 140 impact investors dedicated to funding high-impact cleantech startups.” Source: company website · checked Sep 3, 2026

Showing 25 of 925 impact investment firms based in the United States

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Impact investment firms based in the United States at a glance

As of Sep 3, 2026

1-10Median size (employees)

New YorkLargest hub · 140 HQs

3,929Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

652

11-50

227

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

31–60

304

61–90

2,246

90–180

1,333

180+

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 investment firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 investment firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among impact investment firms, 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 an evidence 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, 3,902 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 3, 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 investment firms by metro

Frequently asked

How many impact investment firms are there based in the United States?

RevenueBase identified 925 impact investment firms 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 investment firms?

New York leads with 140 headquartered companies, followed by San Francisco (61) and Washington (38).

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 3,902 verified decision-maker contacts tracked across these 925 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 3, 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 SmartSearch, 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.