Company lists · Data refreshed September 2026

Top 25 Environmental impact investment firms based in the United States

Name: Environmental 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 28, 2026 984 companies tracked

RevenueBase identified 984 company matches for environmental impact investment firms associated with the United States as of September 2026 and tracks 9,484 professional contacts across them, including 4,159 with verified work emails. New York is the largest hub.

This list covers company matches for environmental impact investment firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

984Companies

9,484Contacts tracked

4,159Verified emails

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The 25 largest environmental impact investment firms based in the United States

Ranked by team size

Top 25 of 984 company matches for environmental impact investment firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Advantage Capital	Exact match	New Orleans, LA, United StatesHQ recorded Sep 28, 2026	51-200	245 contacts →
	Exact match “Advantage Capital is an impact investment firm with an emphasis on driving capital to underserved areas – often in partnership with the public sector.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Anew Climate	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	201-500	200 contacts →
	Exact match “Anew Climate is a global leader of diverse climate solutions, bringing innovative products and services to the public and private sectors to help reduce or offset their carbon…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	HASI	Exact match	Annapolis, MD, United StatesHQ recorded Sep 28, 2026	51-200	196 contacts →
	Exact match “HASI invests in sustainable infrastructure assets advancing the energy transition.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Khosla Ventures	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 28, 2026	51-200	193 contacts →
	Exact match “Khosla Ventures invests in companies that are bold, early and impactful.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Breakthrough Energy	Exact match	Kirkland, United StatesHQ recorded Sep 28, 2026	51-200	159 contacts →
	Exact match “Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	The Vistria Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	51-200	147 contacts →
	Exact match “The Vistria Group is building a new kind of private investment firm that seeks to deliver both financial returns and societal impact.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	ECP Energy Capital Partners	Exact match	Summit, NJ, United StatesHQ recorded Sep 28, 2026	51-200	123 contacts →
	Exact match “ECP (Energy Capital Partners) is an investor in critical infrastructure focused on electrification, decarbonization, reliability and sustainability.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Cleancapital	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	51-200	106 contacts →
	Exact match “Speed and efficiency are the cornerstones of climate finance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	AXA Investment Managers	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	10001+	105 contacts →
	Exact match “Equity and Fixed Income Products Sustainable investments (ESG) Alternative assets (e.g.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	WI Harper Group	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	11-50	100 contacts →
	Exact match “WI Harper Group is a pioneering venture capital firm with over three decades of experience investing in transformative companies that shape the future.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Parnassus Investments	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	51-200	93 contacts →
	Exact match “Since 1984, Parnassus Investments has invested differently.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	SEAF	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	85 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Calvert Research And Management	Exact match	Washington, DC, United StatesHQ recorded Sep 28, 2026	51-200	79 contacts →
	Exact match “Calvert Research and Management is a leader in Responsible Investing.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Trillium Asset Management	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	77 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Social Investment Managers & Advisors Sima Funds	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	51-200	69 contacts →
	Exact match “SIMA Funds is a pioneering impact investment firm and social asset manager dedicated to transforming lives at the Bottom of the Pyramid (BoP).” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	ICA Fund	Exact match	Oakland, CA, United StatesHQ recorded Sep 28, 2026	11-50	64 contacts →
	Exact match “ICA Fund’s impact investing practice creates pathways for businesses to grow through active partnership, personalized advising, and flexible capital.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Forest Investment Associates	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	51-200	63 contacts →
	Exact match “Founded in 1986, Forest Investment Associates (FIA) is an independent, employee-owned firm specializing in natural capital investments through sustainable forestry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Knollwood Investment Advisory	Exact match	Baltimore, MD, United StatesHQ recorded Sep 28, 2026	11-50	63 contacts →
	Exact match “Knollwood Investment Advisory is a global investment firm located outside of Baltimore, Maryland.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Elemental Impact	Exact match	Honolulu, HI, United StatesHQ recorded Sep 28, 2026	51-200	62 contacts →
	Exact match “Elemental Impact is a nonprofit investing platform with 15 years of experience advancing innovative technology that creates lasting economic and climate benefits across…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Impactassets	Exact match	Bethesda, MD, United StatesHQ recorded Sep 28, 2026	51-200	61 contacts →
	Exact match “ImpactAssets is an impact investing trailblazer, dedicated to changing the trajectory of our planet’s future and improving the lives of all people.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Cultivo	Exact match	Berkeley, CA, United StatesHQ recorded Sep 28, 2026	11-50	60 contacts →
	Exact match “Cultivo accelerates investment into nature at scale.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Calvert Impact	Exact match	Bethesda, MD, United StatesHQ recorded Sep 28, 2026	11-50	58 contacts →
	Exact match “Calvert Impact is a global impact investment firm that helps everyday investors and financial professionals invest in solutions that benefit people and the planet.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	GEF Capital Partners	Exact match	Arlington, VA, United StatesHQ recorded Sep 28, 2026	11-50	55 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Capricorn Investment Group	Exact match	Palo Alto, CA, United StatesHQ recorded Sep 28, 2026	11-50	54 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Clean Energy Ventures	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	11-50	54 contacts →
	Exact match “Clean Energy Ventures is a venture capital firm focused on investing in companies commercializing disruptive advanced energy technologies and business model innovations that can…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “environmental impact investment firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 984 environmental impact investment firms based in the United States

See the full list, filter by size, metro and specialty, and access 4,159 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental impact investment firms based in the United States at a glance

As of Sep 28, 2026

43.9%Verified-email coverage

9.6Average contacts per company

1-10Median size (employees)

16.5%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

678

11-50

256

51-200

201-500

501-1,000

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 984 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “environmental impact investment firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 4,159 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Environmental impact investment firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “environmental impact investment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 984 company matches for environmental impact investment firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Advantage Capital tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most environmental impact investment firms?

New York leads with 162 company records, followed by San Francisco (72) and Washington (36).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 4,159 professional contacts with verified work emails tracked across these 984 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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.