Company lists · Data verified August 2026

Top 25 Advertising consulting firms based in the United Kingdom

Name: Advertising 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 4,354 companies tracked

There are 4,354 advertising consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 27,973 professional contacts across them, including 8,005 with verified work emails and 2,264 with mobile numbers. London is the largest hub.

This list covers advertising 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.

4,354Companies

27,973Contacts tracked

8,005Verified emails

2,264Mobile numbers

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The 25 largest advertising consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 4,354 advertising 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	Linney	Mansfield	1,001-5,000	651	450
2	MG OMD	London	201-500	553	332
3	Ogilvy UK	n/a	501-1,000	499	344
4	The7stars	London	201-500	296	196
5	Newbase	London	501-1,000	282	28
6	Bray Leino	Harefield	201-500	184	102
7	Cc33 Global Limited	Sheffield	201-500	171	28
8	Grey London	London	201-500	158	69
9	Krow Group	Norwich	201-500	149	1
10	Zenith UK	London	201-500	133	12
11	Goodstuff	London	51-200	132	105
12	METIA	London	201-500	131	44
13	Instinctif Partners	London	201-500	128	35
14	Adtrak	Nottingham	51-200	93	76
15	Accord Marketing	London	51-200	87	61
16	NET Natives	Brighton	51-200	86	19
17	Konica Minolta Marketing Services	London	501-1,000	85	1
18	Brainsouls	Birmingham	51-200	81	1
19	Dunn&co	Kingston Upon Thames	51-200	70	47
20	RBH Creative Communications	Meriden	51-200	68	44
21	Rock Kitchen Harris	Leicester	51-200	65	44
22	Bicycle B Corp	Clerkenwell	51-200	65	42
23	Forefront International Forefront	London	51-200	65	2
24	Geronimo	London	51-200	65	1
25	Universal Television & Media LTD	Luton	51-200	48	1

Showing 25 of 4,354 advertising consulting firms based in the United Kingdom

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Advertising consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 1383 HQs

2,264Contacts with mobile numbers

45Emails re-verified in last 30 days

Companies by employee count

1-10

3,415

11-50

757

51-200

104

201-500

501-1,000

1,001-5,000

10001+

Advertising consulting firms by metro

Metro	Companies
Advertising consulting firms in London	1383
Advertising consulting firms in Manchester	133
Advertising consulting firms in Birmingham	89
Advertising consulting firms in Leeds	69
Advertising consulting firms in Bristol	55
Advertising consulting firms in Edinburgh	46
Advertising consulting firms in Glasgow	45

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 “advertising 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; 45 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 advertising consulting firms are there based in the United Kingdom?

There are 4,354 advertising consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Linney, headquartered in Mansfield, tops this list with the largest team on record.

Which city has the most advertising consulting firms?

London leads with 1383 headquartered companies, followed by Manchester (133) and Birmingham (89).

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 8,005 verified decision-maker contacts tracked across these 4,354 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.