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Company lists · Data refreshed September 2026

Top 24 Operations consulting firms based in the United Kingdom

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 7,058 companies tracked

RevenueBase identified 7,058 operations consulting firms headquartered in the United Kingdom as of September 2026 and tracks 70,658 professional contacts across them, including 26,866 with verified work emails and 6,774 with mobile numbers. London is the largest hub.

This list covers operations 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. 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
7,058Companies
70,658Contacts tracked
26,866Verified emails
6,774Mobile numbers
Unlock all 7,058 companies Free signup · no credit card · 500 free credits

The 24 largest operations consulting firms based in the United Kingdom

Ranked by team size
Top 24 of 7,058 operations consulting firms based in the 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
UnipartIndirect evidence
Oxford, United KingdomHQ checked Sep 5, 202610001+3,205

“Unipart is a supply chain performance improvement partner, delivering efficiency, resilience, and sustainability across multiple sectors.”

Source: company website · checked Sep 5, 2026
3
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
4
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
5
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
6
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
7
Q5Indirect evidence
London, United KingdomHQ checked Sep 5, 2026501-1,000344

“Q5 is a global, award-winning management consultancy focused on building healthy, high-performing organisations.”

Source: company website · checked Sep 5, 2026
8
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
9
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
10
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
11
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
12
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
13
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
14
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
15
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
16
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
17
ClarifyIndirect evidence
Theale, United KingdomHQ checked Sep 5, 202651-200191

“Clarify helps global Technology companies achieve sustained and significant commercial success.”

Source: company website · checked Sep 5, 2026
18
Rudolph & HellmannPartial evidence
Lichfield, United KingdomHQ checked Sep 5, 20261,001-5,000191

“We work discretely with organisations in any sector who need help trouble shooting or optimising their supply chain, production logistics or operational infrastructure.”

Source: company website · checked Sep 5, 2026
19
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
20
AzurianIndirect evidence
London, United KingdomHQ checked Sep 5, 2026201-500178

“The future has never moved this fast.”

Source: company website · checked Sep 5, 2026
21
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
22
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
23
TXM ConsultIndirect evidence
Milton Keynes, United KingdomHQ checked Sep 5, 202651-200166

“In an uncertain, complex, and ambiguous world, business change is essential and inevitable.”

Source: company website · checked Sep 5, 2026
24
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

Showing 24 of 7,058 operations consulting firms based in the United Kingdom

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Operations consulting firms based in the United Kingdom at a glance

As of Sep 5, 2026
1-10Median size (employees)
LondonLargest hub · 2651 HQs
6,774Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
5,748
11-50
921
51-200
255
201-500
47
501-1,000
15
1,001-5,000
21
5,001-10,000
6
10001+
6

Verified emails by last verification

0–30
24,863
31–60
1,764
61–90
23
90–180
29
180+
187

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 the 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 United Kingdom 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, 26,866 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

Frequently asked

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

RevenueBase identified 7,058 operations consulting firms headquartered in the 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 26,866 verified decision-maker contacts tracked across these 7,058 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 7,058 operations consulting firms based in the United Kingdom. Start with a free account, no credit card.

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Related lists

Browse: Companies home · 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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