Company lists · Data verified August 2026

Top 25 Advertising agencies based in Spain

Name: Advertising agencies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 3,111 companies tracked

There are 3,111 advertising agencies headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 31,518 professional contacts across them, including 3,099 with verified work emails and 1,116 with mobile numbers. Madrid is the largest hub.

This list covers advertising agencies headquartered in Spain, 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.

3,111Companies

31,518Contacts tracked

3,099Verified emails

1,116Mobile numbers

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The 25 largest advertising agencies based in Spain

Ranked by team size

Top 25 of 3,111 advertising agencies based in Spain, 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	LLYC	Madrid	1,001-5,000	1,529	254
2	Atresmedia Publicidad	Barcelona	51-200	308	1
3	Publicis Groupe España	Madrid	501-1,000	276	36
4	Lola Mullenlowe	Madrid	51-200	257	27
5	Momentum Task Force	Madrid	201-500	227	15
6	Conway Partners	Madrid	51-200	158	49
7	OMD España	Madrid	201-500	151	32
8	AFTER	n/a	51-200	133	38
9	BE A Lion	Barcelona	51-200	113	24
10	MIO Group	Madrid	201-500	112	13
11	Mccann Worldgroup Spain	Madrid	501-1,000	111	16
12	MIO ONE	Madrid	51-200	105	11
13	Agencia Tango	Madrid	51-200	99	16
14	Zenith España	Madrid	51-200	92	8
15	Everyone Plus	San Sebastian De Los Reyes	51-200	84	19
16	JFT Comunicación	Las Palmas De Gran Canaria Las Palmas De Gran Canaria	51-200	75	12
17	Serena	Madrid	51-200	74	17
18	Grupo Marva	Madrid	201-500	74	11
19	Omnicom Media Group Spain	Madrid	201-500	71	14
20	Godó Strategies	Barcelona	51-200	70	13
21	Publicis España	Madrid	201-500	69	19
22	RK People	Madrid	51-200	69	10
23	Grupo GO	Madrid	51-200	60	20
24	Doubleyou	Barcelona	51-200	57	11
25	UM Spain	Valencia	201-500	57	7

Showing 25 of 3,111 advertising agencies based in Spain

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Advertising agencies based in Spain at a glance

As of Aug 28, 2026

1-10Median size (employees)

MadridLargest hub · 846 HQs

1,116Contacts with mobile numbers

16Emails re-verified in last 30 days

Companies by employee count

1-10

2,330

11-50

663

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Advertising agencies by metro

Metro	Companies
Advertising agencies in Madrid	846
Advertising agencies in Barcelona	493
Advertising agencies in Valencia	111
Advertising agencies in Malaga	81
Advertising agencies in Sevilla	58
Advertising agencies in Bilbao	38
Advertising agencies in Zaragoza	37

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 match quality audited by blind human judging, and headquartered in Spain.
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; 16 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 are there based in Spain?

There are 3,111 advertising agencies headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

LLYC, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most advertising agencies?

Madrid leads with 846 headquartered companies, followed by Barcelona (493) and Valencia (111).

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 3,099 verified decision-maker contacts tracked across these 3,111 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.