The top 50 UK marketing agencies, 2026
The UK's biggest marketing, media and communications agencies ranked by the turnover in their own filed Companies House accounts — not self-reported billings. One entity per global network (only Publicis files a single UK figure), advertising platforms and media owners excluded, and media-agency rows tagged because gross billings and fee income are not the same thing.
What the filings show
The most striking number on this list is one that doesn't exist: a UK figure for WPP. Of the five global networks that dominate British advertising, only Publicis files a single consolidated UK account — £1.38B, which is why it tops the table. WPP, Omnicom, Dentsu and Havas split their UK businesses across dozens of separately-filing entities, so each is ranked here on its largest single filer with the rest footnoted. British advertising's true league table is, quite literally, unpublished.
Read the media rows with one eye on the accounting. A media agency buying space as principal can carry gross billings in turnover, which is how 17 media specialists — the7stars (£482M) the largest among them — sit alongside creative firms whose turnover is fee income. The tags on each row say which is which; the staff column is often the better size signal.
The independents are holding their own: 46 of the top 51 are outside the global networks, from OLIVER's in-housing model and VCCP to Mother, still London's biggest independent creative shop. The fastest growers — Real Chemistry UK (+80%), WPP Media (+57%), Anything Is Possible (+56%), Uncommon (+39%) — are specialists, not holding companies.
Top 50 marketing agencies in the UK by filed turnover
Latest accounts filed as of August 2026 · refreshed monthly
| # | Firm | Turnover | YoY | Staff | Accounts |
|---|---|---|---|---|---|
| 01 | Publicis UK network Holdco for UK advertising agencies MMS UK Holdings Limited — the only global agency network that files a single consolidated UK figure. Saatchi & Saatchi, Leo Burnett, Zenith and Starcom sit inside it. | £1.38B | +1% | 9,547 | FY to Dec 2024 |
| 02 | WPP Media network (media) Media and advertising agency subsidiary WPP Media UK Limited (formerly GroupM), the network’s largest UK filer. WPP files no UK consolidation — Mindshare (£216M), EssenceMediacom (£207M), Wavemaker (£146M), Ogilvy (£104M) and others file separately and are not summed here. | £784M | +57% | 2,285 | FY to Dec 2025 |
| 03 | the7stars media Holdco for an advertising agency The UK’s largest independent media agency; media-agency turnover includes gross media billings. | £482M | +7% | 310 | FY to Mar 2025 |
| 04 | Next 15 Digital marketing and communications group Next 15 Group plc, consolidated — a global group of agencies and consultancies. | £449M | -6% | 3,681 | FY to Jan 2026 |
| 05 | Brunswick corporate comms Corporate communications and advisory firm Brunswick Group Partnership Limited, consolidated. | £424M | +3% | 1,366 | FY to Dec 2024 |
| 06 | Talon media Out-of-home media agency Out-of-home media agency (buys for advertisers; OOH media owners are excluded). | £393M | +6% | 225 | FY to Dec 2025 |
| 07 | M&C Saatchi M&C Saatchi plc, consolidated — a global group; the UK is its largest market. | £393M | — | 1,988 | FY to Dec 2024 |
| 08 | OLIVER Marketing and advertising agency group Inside Ideas Group Ltd — in-housing specialist; part of The Brandtech Group, whose agencies file separately. | £370M | — | — | FY to Dec 2024 |
| 09 | Dentsu UK network Advertising and marketing agency Dentsu UK Limited, the network’s largest UK filer; Dentsu files no single UK consolidation. | £326M | -1% | 2,833 | FY to Dec 2024 |
| 10 | Havas Media network (media) Media planning and buying agency The network’s largest UK filer; Havas files no UK consolidation — Havas Worldwide London and Arena Media file separately. | £310M | +2% | 562 | FY to Dec 2024 |
| 11 | Omnicom Media Group UK network (media) The network’s largest UK-scope filer; Omnicom files no UK consolidation. OMD EMEA (£682M) is a multi-territory entity and is not ranked. | £299M | +19% | 1,827 | FY to Dec 2024 |
| 12 | Jellyfish Digital marketing and performance agency Jellyfish Digital Group Limited, consolidated; part of The Brandtech Group. | £251M | +3% | 1,664 | FY to Dec 2024 |
| 13 | VCCP VCCP Group LLP. | £184M | — | 623 | FY to Dec 2024 |
| 14 | ITG Inspired Thinking Group (ITG) Limited — marketing execution/technology. | £165M | +10% | 1,172 | FY to Aug 2024 |
| 15 | Ptarmigan Media media Financial-services specialist media agency. | £162M | +25% | 152 | FY to Dec 2025 |
| 16 | We Are Social Part of The Brandtech Group. | £155M | -6% | 1,154 | FY to Dec 2024 |
| 17 | Astus media Media barter specialist; turnover reflects traded media value. | £151M | -3% | 44 | FY to Dec 2024 |
| 18 | MVF digital Marketing VF Ltd — performance marketing and lead generation. | £145M | +4% | 361 | FY to Mar 2025 |
| 19 | All Response Media media | £142M | +2% | 117 | FY to Dec 2024 |
| 20 | MediaPlus UK media UK agency of Germany’s Serviceplan group. | £121M | +31% | 95 | FY to Dec 2024 |
| 21 | Edelman UK PR & comms Daniel J. Edelman Limited — the UK arm of the world’s largest PR firm. | £115M | -9% | 576 | FY to Jun 2025 |
| 22 | Jakala UK digital Data and martech consultancy, UK arm of Italy’s Jakala. | £105M | +30% | 53 | FY to Dec 2025 |
| 23 | Mother London’s biggest independent creative agency. | £95M | +33% | 262 | FY to Dec 2024 |
| 24 | Republic of Media media | £88M | +3% | 55 | FY to Mar 2025 |
| 25 | Space & Time media | £65M | — | 130 | 9-mo period to Mar 2025 |
| 26 | Uncommon Uncommon Creative Studio — majority-owned by Havas but reporting independently. | £85M | +39% | 180 | FY to Dec 2025 |
| 27 | Iris Iris Worldwide Holdings Limited, consolidated; owned by Cheil Worldwide. | £84M | -28% | 483 | FY to Dec 2024 |
| 28 | Fundamental Media media | £83M | -25% | 178 | FY to Dec 2024 |
| 29 | John Ayling media John Ayling Group Limited. | £81M | +25% | 64 | FY to Dec 2024 |
| 30 | What's Possible media What’s Possible Marketing Group (The Specialist Works’ parent renamed); group entities also file separately. | £74M | — | 99 | FY to Mar 2025 |
| 31 | The Kite Factory media | £69M | +9% | 99 | FY to Dec 2024 |
| 32 | Lewis PR & comms Lewis Communications (Holdings) Limited, consolidated. | £64M | -8% | 558 | FY to Jul 2025 |
| 33 | Performance54 Golf and sport marketing group. | £61M | -33% | 123 | FY to Apr 2025 |
| 34 | Intermarketing | £60M | +0% | 306 | FY to Dec 2024 |
| 35 | Four Agency PR & comms | £52M | -16% | 246 | FY to Dec 2024 |
| 36 | N2O Brand experience agency. | £51M | +18% | 204 | FY to Dec 2025 |
| 37 | AKA Entertainment and theatre marketing. | £50M | -15% | 140 | FY to Mar 2025 |
| 38 | Radio Works media | £43M | +18% | 32 | FY to Dec 2024 |
| 39 | Kepler media Kepler Group EMEA — programmatic media. | £41M | +18% | 88 | FY to Dec 2024 |
| 40 | Generation Media media Sibling Generation Media Enterprises files separately. | £38M | -25% | 52 | FY to Mar 2025 |
| 41 | Dewynters Live-entertainment marketing. | £38M | +6% | 94 | FY to Jun 2025 |
| 42 | Premier PR & comms Premier Public Relations — entertainment publicity. | £36M | +16% | 175 | FY to Sept 2025 |
| 43 | Pablo | £36M | +35% | 99 | FY to Mar 2025 |
| 44 | Bountiful Cow media | £36M | +37% | 23 | FY to Mar 2025 |
| 45 | Real Chemistry UK health comms UK arm of the US health-marketing group. | £35M | +80% | 254 | FY to Dec 2024 |
| 46 | Syneos Health Communications UK health comms | £35M | -8% | 212 | FY to Dec 2024 |
| 47 | Twentysix digital | £32M | +13% | 98 | FY to Feb 2025 |
| 48 | Anything Is Possible media | £31M | +56% | 63 | FY to Dec 2024 |
| 49 | Webgains digital Affiliate marketing network. | £29M | -2% | 55 | FY to Dec 2024 |
| 50 | Accord Marketing | £29M | -10% | 69 | FY to Sept 2024 |
The next 1
Firms ranked 51–51
| 51 | Freud Communications PR & comms | £28M | -6% | FY to Dec 2024 |
The firms we can't rank
In this industry the biggest gap is structural: most of the global networks simply don't publish a UK number.
- WPP (single UK figure) — files no UK consolidation — its UK agencies file as dozens of separate entities; WPP Media UK is ranked as the largest
- Omnicom, Dentsu, Havas, IPG (single UK figures) — none file a UK consolidation; each is ranked on its largest UK-scope entity
- S4 Capital (Monks) — FY2024 accounts are filed but the document is not yet retrievable from Companies House; its stale FY2023 figure would overstate a known decline
- MSQ — group entities file as audit-exempt subsidiaries of an unidentified topco
- Brainlabs — no UK group filing with disclosed turnover surfaced in scope
- Goodstuff — holding company files without group turnover disclosure
- McCann / Mediabrands UK (IPG) — IPG’s UK entities file individually and none is large enough to represent the network
How this list is built
Source. The latest annual accounts each firm filed at Companies House. Where a firm files consolidated group accounts, the group figure is used; the entity ranked is named under each firm. Where a firm filed a transition period longer or shorter than twelve months (flagged in the Accounts column), the table shows the filed figure but the firm is ranked on its annualised equivalent.
Who counts as a marketing agency. Advertising, creative, media, digital, PR/communications and health-comms agencies (tagged by segment). We exclude advertising platforms (Facebook UK files under the agency SIC code), out-of-home media owners, adtech vendors, sports-rights and talent agencies, publishers and directories — businesses that sell media or technology rather than agency services.
One entity per network. None of WPP, Omnicom, Dentsu, Havas or IPG files a UK consolidation, so each network is represented by its largest single UK-scope filer, with sibling entities excluded rather than double-counted. Media-agency turnover can include gross billings under principal arrangements — those rows are tagged, and comparing them with fee-income rows is exactly the trap this methodology section exists to flag.
Cadence. Rebuilt monthly as new accounts land. Spot a agency we've missed or misread? Tell us — the methodology only works if it's challenged.
Quick answers
- What is the biggest marketing agency in the UK?
- By filed turnover, Publicis UK — £1.38B in its latest UK accounts (FY to Dec 2024), covering Saatchi & Saatchi, Leo Burnett, Zenith and Starcom. It is the only global network that files one consolidated UK figure; the biggest independent is the7stars among media agencies and OLIVER among creative groups.
- Why isn't WPP number one?
- WPP is almost certainly the UK's biggest agency group — but it files no UK consolidation. Its UK business is spread across dozens of separately-filing entities (Mindshare, EssenceMediacom, Wavemaker, Ogilvy, VML and more), so this list ranks its largest single UK filer, WPP Media, and refuses to invent a total that no audited filing supports.
- Why do media agencies look so much bigger than creative agencies?
- Media agencies buy advertising space for clients, and under principal-based arrangements the gross media spend can flow through their turnover line. A media agency's £400M is not comparable to a creative agency's £100M of fees — the media rows are tagged so you can read them accordingly.
- How is this list different from Campaign's agency rankings?
- Trade rankings rely on self-reported billings and estimates. This list ranks only what each agency filed at Companies House — audited turnover, with platforms, media owners and adtech vendors excluded, one entity per global network, and the firms whose filings can't be ranked named rather than guessed at.