Company lists · Data verified August 2026

Top 25 Advertising agencies with in-house production based in London, United Kingdom

Name: Advertising agencies with in-house production based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 3,130 companies tracked

There are 3,130 advertising agencies with in-house production headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 31,772 professional contacts across them, including 6,986 with verified work emails and 3,081 with mobile numbers. London is the largest hub.

This list covers advertising agencies with in-house production headquartered in London, 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.

3,130Companies

31,772Contacts tracked

6,986Verified emails

3,081Mobile numbers

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The 25 largest advertising agencies with in-house production based in London, United Kingdom

Ranked by team size

Top 25 of 3,130 advertising agencies with in-house production based in London, 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	Anomaly	London	501-1,000	765	426
2	MG OMD	London	201-500	553	332
3	Mullenlowe Global	London	1,001-5,000	547	21
4	BBH London	London	201-500	518	204
5	The7stars	London	201-500	296	196
6	Newbase	London	501-1,000	282	28
7	Forsman & Bodenfors	London	201-500	257	179
8	Partizan	London	51-200	209	18
9	Animated Storyboards	London	201-500	197	51
10	VIDSY	London	51-200	187	88
11	Havas London	London	201-500	163	76
12	Clockwork	London	51-200	161	108
13	Grey London	London	201-500	158	69
14	RSA Films	London	51-200	141	30
15	SPARK	London	51-200	133	18
16	Citypress	London	51-200	132	95
17	Wonderhood Studios	London	51-200	107	79
18	Splice	London	51-200	107	56
19	John DOE	London	51-200	96	32
20	Innocean UK	London	51-200	78	54
21	Unreasonable Studios	London	1,001-5,000	68	41
22	RD Content	London	51-200	67	26
23	Newcycle	London	51-200	67	5
24	Tapestry	London	51-200	65	34
25	Forefront International Forefront	London	51-200	65	2

Showing 25 of 3,130 advertising agencies with in-house production based in London, United Kingdom

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Advertising agencies with in-house production based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 3130 HQs

3,081Contacts with mobile numbers

40Emails re-verified in last 30 days

Companies by employee count

1-10

2,316

11-50

657

51-200

104

201-500

501-1,000

1,001-5,000

10001+

Advertising agencies with in-house production by metro in the United Kingdom

Metro	Companies
Advertising agencies with in-house production in London	3130
Advertising agencies with in-house production in Manchester	290
Advertising agencies with in-house production in Birmingham	164
Advertising agencies with in-house production in Leeds	147
Advertising agencies with in-house production in Bristol	143
Advertising agencies with in-house production in Glasgow	111
Advertising agencies with in-house production in Edinburgh	92

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 agencies with in-house production”, with match quality audited by blind human judging, and headquartered in London, 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; 40 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 agencies with in-house production are there based in London, United Kingdom?

There are 3,130 advertising agencies with in-house production headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most advertising agencies with in-house production?

London leads with 3130 headquartered companies, followed by Manchester (290) and Birmingham (164).

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 6,986 verified decision-maker contacts tracked across these 3,130 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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Related lists

Advertising agencies with in-house production by geography

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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.