Company lists · Data verified August 2026

Top 25 Esg consulting firms based in the United Kingdom

Name: Esg consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,346 companies tracked

There are 1,346 esg consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 21,182 professional contacts across them, including 10,097 with verified work emails and 2,707 with mobile numbers. London is the largest hub.

This list covers esg consulting firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

1,346Companies

21,182Contacts tracked

10,097Verified emails

2,707Mobile numbers

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The 25 largest esg consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,346 esg consulting firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	ERM	London	5,001-10,000	9,214	4,560
2	Morningstar Sustainalytics	London	1,001-5,000	949	316
3	Ricardo PLC	London	1,001-5,000	680	290
4	Valpak Limited	Stratford-Upon-Avon	201-500	364	264
5	H&z Management Consulting	London	501-1,000	287	153
6	Wardell Armstrong LLP Part Of SLR	Edinburgh	501-1,000	253	131
7	The Erith Group	London	501-1,000	215	127
8	Aqua Consultants	Birmingham	51-200	163	99
9	Generation Investment Management	London	51-200	155	117
10	Arthian LTD	Anglesey	201-500	152	105
11	Evora Global	London	51-200	149	120
12	Eunomia Research & Consulting	London	51-200	141	100
13	Weefin	London	51-200	119	34
14	Black SUN Global	London	51-200	118	65
15	Eric Salmon & Partners	n/a	51-200	118	63
16	Cfgi UK	Birmingham	51-200	111	87
17	Vpwhite	n/a	51-200	104	66
18	Catalyst	London	51-200	97	59
19	3keel	Oxford	51-200	93	65
20	Greengage Environmental LTD	Manchester	51-200	92	52
21	AES Sustainability Consultants	Tiverton	51-200	91	70
22	Sustainable Advantage	London	51-200	88	55
23	FLAG	London	51-200	83	42
24	Design Portfolio	Leeds	51-200	82	61
25	Team Energy Auditing Agency LTD	Milton Keynes	51-200	70	31

Showing 25 of 1,346 esg consulting firms based in the United Kingdom

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Esg consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 570 HQs

2,707Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

995

11-50

254

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Esg consulting firms by metro

Metro	Companies
Esg consulting firms in London	570
Esg consulting firms in Manchester	38
Esg consulting firms in Bristol	33
Esg consulting firms in Edinburgh	15
Esg consulting firms in Glasgow	14
Esg consulting firms in Cambridge	13
Esg consulting firms in Oxford	13

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “esg consulting firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many esg consulting firms are there based in the United Kingdom?

There are 1,346 esg consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

ERM, headquartered in London, tops this list with the largest team on record.

Which city has the most esg consulting firms?

London leads with 570 headquartered companies, followed by Manchester (38) and Bristol (33).

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 10,097 verified decision-maker contacts tracked across these 1,346 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.