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Company lists · Data refreshed September 2026

Top 25 Operations consulting firms based in London, United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 2,651 companies tracked

RevenueBase identified 2,651 operations consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 46,801 professional contacts across them, including 21,040 with verified work emails. London is the largest hub.

This list covers operations consulting firms headquartered in London, United Kingdom, 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 5, 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 5, 2026 86% judged on-target in blind review
2,651Companies
46,801Contacts tracked
21,040Verified emails
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The 25 largest operations consulting firms based in London, United Kingdom

Ranked by team size
Top 25 of 2,651 operations consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names operations consulting 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.
#CompanyHeadquartersEmployeesContacts
1
Ey-ParthenonIndirect evidence
London, United KingdomHQ checked Sep 5, 202610001+17,070

“Our unique combination of transformative strategy, transactions and corporate finance delivers real-world value – solutions that work in practice, not just on paper.”

Source: company website · checked Sep 5, 2026
2
BaringaPartial evidence
London, United KingdomHQ checked Sep 5, 20261,001-5,0002,179

“Baringa is a global consulting firm that helps leaders drive meaningful change and create value.”

Source: company website · checked Sep 5, 2026
3
EfficioIndirect evidence
London, United KingdomHQ checked Sep 5, 20261,001-5,0001,304

“Efficio is a global leader in procurement and supply chain management and transformation.”

Source: company website · checked Sep 5, 2026
4
Oc&c Strategy ConsultantsIndirect evidence
London, United KingdomHQ checked Sep 5, 2026501-1,0001,011

“At OC & C Strategy Consultants we have more than 35 years of experience at unpicking the most complex business challenges with simple, uncommon sense™.”

Source: company website · checked Sep 5, 2026
5
EmergnIndirect evidence
London, United KingdomHQ checked Sep 5, 2026501-1,000351

“Emergn is a global technology and management consultancy built on a simple conviction: the only sustainable competitive advantage is the way you work.”

Source: company website · checked Sep 5, 2026
6
DaviesPartial evidence
London, United KingdomHQ checked Sep 5, 20265,001-10,000329

“We are the global consulting division of Davies, accelerating business, technology and people performance across financial services including Retail Finance & Corporate Banking…”

Source: company website · checked Sep 5, 2026
7
CartesianPartial evidence
London, United KingdomHQ checked Sep 5, 2026201-500302

“Cartesian is a specialist consulting firm focused on the global telecommunications, media, and technology industries and is now part of Bounteous, an AI services firm helping…”

Source: company website · checked Sep 5, 2026
8
ElixirrPartial evidence
London, United KingdomHQ checked Sep 5, 2026501-1,000275

“An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.”

Source: company website · checked Sep 5, 2026
9
TransformPartial evidence
London, United KingdomHQ checked Sep 5, 2026201-500255

“Transform is a fresh alternative to Big Consulting.”

Source: company website · checked Sep 5, 2026
10
Moorhouse B Corp CertifiedPartial evidence
London, United KingdomHQ checked Sep 5, 2026201-500247

“We’re a dynamic consulting firm, focused on delivering change.”

Source: company website · checked Sep 5, 2026
11
PerciperePartial evidence
London, United KingdomHQ checked Sep 5, 2026201-500245

“Percipere is a niche global consultancy, partnering companies in their evolution towards greater operational efficiency and profitability.”

Source: company website · checked Sep 5, 2026
12
Albany BeckPartial evidence
London, United KingdomHQ checked Sep 5, 2026201-500240

“Albany Beck is a client-first consulting firm helping financial services organisations deliver complex change and build capability, not dependency.”

Source: company website · checked Sep 5, 2026
13
QuantzigIndirect evidence
London, United KingdomHQ checked Sep 5, 2026201-500216

“Quantzig is at the forefront of partnering with businesses to help them unlock transformative value through analytics solutions.”

Source: company website · checked Sep 5, 2026
14
Retail ReplyIndirect evidence
London, United KingdomHQ checked Sep 5, 202651-200214

“Retail Reply helps clients accelerate their response to the opportunities of digital transformation in the retail and consumer sector.”

Source: company website · checked Sep 5, 2026
15
True North PartnersPartial evidence
London, United KingdomHQ checked Sep 5, 202651-200185

“True North Partners LLP is an independent consulting firm based in London, Johannesburg, Frankfurt, Amsterdam and Madrid.”

Source: company website · checked Sep 5, 2026
16
AzurianIndirect evidence
London, United KingdomHQ checked Sep 5, 2026201-500178

“The future has never moved this fast.”

Source: company website · checked Sep 5, 2026
17
ClarasysPartial evidence
London, United KingdomHQ checked Sep 5, 202651-200170

“We are an employee-owned, award-winning international consulting firm that believes there’s a better way to do consultancy.”

Source: company website · checked Sep 5, 2026
18
BIP UKIndirect evidence
London, United KingdomHQ checked Sep 5, 20265,001-10,000167

“BIP is the international consultancy for the 21st century with over 6,500 consultants globally daring to make a difference.”

Source: company website · checked Sep 5, 2026
19
CVLIndirect evidence
London, United KingdomHQ checked Sep 5, 2026n/a165

“Strategic development for already dynamic businesses, successful mergers & acquisitions between household names, technology planning in cutting edge industries and real-world…”

Source: company website · checked Sep 5, 2026
20
Interex GroupIndirect evidence
London, United KingdomHQ checked Sep 5, 202651-200160

“InterEx Group is becoming the strategic partner of choice for organizations undergoing digital, business, and technology transformation.”

Source: company website · checked Sep 5, 2026
21
The Berkeley PartnershipIndirect evidence
London, United KingdomHQ checked Sep 5, 202651-200152

“Founded in 1990, The Berkeley Partnership is an independent management consultancy, specialising in business transformation.”

Source: company website · checked Sep 5, 2026
22
ORGIndirect evidence
London, United KingdomHQ checked Sep 5, 20261,001-5,000139

“We believe that change is an opportunity to thrive.”

Source: company website · checked Sep 5, 2026
23
LiqueoIndirect evidence
London, United KingdomHQ checked Sep 5, 202651-200123

“Specialists in change and transformation across asset, wealth and insurance.”

Source: company website · checked Sep 5, 2026
24
AthensIndirect evidence
London, United KingdomHQ checked Sep 5, 202611-50122

“Athens helps clients make superior investment decisions and supports them to deliver value from these decisions through timely implementation.”

Source: company website · checked Sep 5, 2026
25
ChartwellPartial evidence
London, United KingdomHQ checked Sep 5, 202651-200117

“Chartwell is a global operations consultancy with offices in London, Boston and Hamburg.”

Source: company website · checked Sep 5, 2026

Showing 25 of 2,651 operations consulting firms based in London, United Kingdom

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Operations consulting firms based in London, United Kingdom at a glance

As of Sep 5, 2026
1-10Median size (employees)
LondonLargest hub · 2651 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
1,955
11-50
473
51-200
153
201-500
30
501-1,000
6
1,001-5,000
16
5,001-10,000
6
10001+
3

Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for London, over 2,651 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 operations consulting 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 London, United Kingdom whose own description of what they do matches “operations consulting 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 operations consulting firms, and records with no verified work email. Companies headquartered outside London 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, 21,040 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 5, 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.

Operations consulting firms by metro in the United Kingdom

Frequently asked

How many operations consulting firms are there based in London, United Kingdom?

RevenueBase identified 2,651 operations consulting firms headquartered in London, United Kingdom 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?

Ey-Parthenon, headquartered in London, tops this list with the largest team on record.

Which city has the most operations consulting firms?

London leads with 2651 headquartered companies, followed by Manchester (153) and Glasgow (86).

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 21,040 verified decision-maker contacts tracked across these 2,651 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 2,651 operations consulting firms based in London, United Kingdom. Start with a free account, no credit card.

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Related lists

Browse: Companies home · Operations consulting firms in United Kingdom · All United Kingdom lists · All Operations consulting firms lists · New lists

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.

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