According to its research, ZenithOptimedia’s global media billings and other activities were worth £1.72 billion in 2013, a drop of 6 per cent on 2012. Havas Media’s overall activity was valued at £624 million, down 8 per cent.
WPP’s MediaCom was the largest media agency in the UK in 2013 with £2.66 billion from media billings and other activities, an increase of more than £100 million on 2012.
Recma measures media billings as well as that from activities such as digital and diversified services.
The Dentsu-owned Carat was second with £1.96 billion, while Group M’s Mindshare was third (£1.84 billion).
| Rank 2013 | Industry Shares 2013 | Media Networks incl agency brands and other media entities | Overall activity 2013 rounded £bn | Overall activity 2012 rounded £bn | Growth rate yoy % |
| 1 | 16.2% | MediaCom / Group M | 2 655 | 2 505 | 6% |
| 2 | 12.0% | Carat / Dentsu Aegis | 1 964 | 1 945 | 1% |
| 3 | 11.3% | Mindshare (inc M/Six)/Group M | 1 843 | 1 757 | 5% |
| 4 | 11.2% | OMD / OMG | 1 835 | 1 731 | 6% |
| 5 | 11.2% | MEC / Group M | 1 828 | 1 549 | 18% |
| 6 | 10.5% | ZenithOptimedia / Publicis | 1 723 | 1 831 | -6% |
| 7 | 5.9% | StarcomMediaVes t/ Publicis | 972 | 838 | 16% |
| 8 | 4.6% | Maxus/ Group M | 758 | 632 | 20% |
| 9= | 3.8% | PHD (inc Rocket) / OMG | 624 | 589 | 6% |
| 9= | 3.8% | Havas Media (inc Arena) / Havas | 624 | 679 | -8% |
| 11 | 3.7% | Vizeum / Dentsu Aegis | 602 | 533 | 13% |
| 12 | 3.4% | UM/ Mediabrands | 548 | 468 | 17% |
| 13 | 2.3% | Initiative / Mediabrands | 368 | 341 | 8% |
| - | 100% | Total Neworks studied by RECMA | 16 345 | 15 398 | 6% |
| - | - | The 7stars (affil BPN)/ Independent | 162 | 121 | 34% |
| - | - | All Response Media/ Independent | 146 | 140 | 4% |
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