| Rank | Logo | Company | Market Cap | Country |
|---|---|---|---|---|
| 1 |  | Omnicom Group | $23.85 B | USA |
| 2 |  | Publicis Groupe | $20.66 B | France |
| 3 |  | Focus Media Information Technology | $14.01 B | China |
| 4 |  | Lamar Advertising | $12.91 B | USA |
| 5 |  | JCDecaux | $4.90 B | France |
| 6 |  | Outfront Media | $4.68 B | USA |
| 7 |  | Dentsu | $4.54 B | Japan |
| 8 |  | CyberAgent | $4.48 B | Japan |
| 9 |  | Zeta Global | $4.23 B | USA |
| 10 |  | WPP | $3.26 B | UK |
| 11 |  | Ströer | $2.08 B | Germany |
| 12 |  | Saudi Research and Media Group | $1.92 B | S. Arabia |
| 13 |  | Magnite | $1.80 B | USA |
| 14 |  | Ziff Davis | $1.67 B | USA |
| 15 |  | DoubleVerify | $1.62 B | USA |
| 16 |  | Arabian Contracting Services Company | $1.62 B | S. Arabia |
| 17 |  | Stagwell | $1.57 B | USA |
| 18 |  | Clear Channel Outdoor | $1.17 B | USA |
| 19 |  | Taboola.com | $0.91 B | USA |
| 20 |  | Criteo | $0.89 B | France |
| 21 |  | APG|SGA | $0.79 B | Switzerland |
| 22 |  | Viant Technology | $0.73 B | USA |
| 23 |  | QuinStreet | $0.68 B | USA |
| 24 |  | MNTN, Inc. | $0.67 B | USA |
| 25 |  | MediaAlpha | $0.63 B | USA |
| 26 |  | Gree | $0.41 B | Japan |
| 27 |  | PubMatic | $0.38 B | USA |
| 28 |  | Perion Network | $0.37 B | Israel |
| 29 |  | Boston Omaha | $0.37 B | USA |
| 30 |  | Nexxen | $0.36 B | Israel |
| 31 |  | oOh!media Limited | $0.35 B | Australia |
| 32 |  | Quad | $0.34 B | USA |
| 33 |  | Verve Group SE | $0.32 B | Sweden |
| 34 |  | National CineMedia | $0.30 B | USA |
| 35 |  | IVE Group | $0.28 B | Australia |
| 36 |  | TechTarget | $0.27 B | USA |
| 37 |  | Advantage Solutions | $0.26 B | USA |
| 38 |  | M&C Saatchi | $0.19 B | UK |
| 39 |  | Solocal Group | $0.17 B | France |
| 40 |  | S4 Capital | $0.17 B | UK |
| 41 |  | Yellow Pages (Canada) | $0.12 B | Canada |
| 42 |  | Azerion Group | $0.12 B | Netherlands |
| 43 |  | ADLPartner (Dékuple) | $0.10 B | France |
| 44 |  | Reworld Media | $99.52 M | France |
| 45 |  | The Pebble Group plc | $97.82 M | UK |
| 46 |  | Tihama for Advertising, Public Relations and Marketing | $87.3 M | S. Arabia |
| 47 |  | High Co. | $78.05 M | France |
| 48 |  | ad pepper media International | $76.9 M | Germany |
| 49 |  | Bilendi SA | $74.22 M | France |
| 50 |  | Haoxi Health Technology | $69.84 M | China |
| 51 |  | Teads | $66.25 M | USA |
| 52 |  | Zoomd Technologies | $63.88 M | Canada |
| 53 |  | Marchex | $62.78 M | USA |
| 54 |  | IZEA Worldwide | $59.76 M | USA |
| 55 |  | System1 Group | $49.51 M | UK |
| 56 |  | Inuvo | $36.19 M | USA |
| 57 |  | Comscore | $34.5 M | USA |
| 58 |  | illumin | $33.85 M | Canada |
| 59 |  | YOC AG | $25.08 M | Germany |
| 60 |  | Harte Hanks | $19.64 M | USA |
| 61 |  | Axel Mark | $10.27 M | Japan |
| 62 |  | PopReach | $7.81 M | Canada |
| 63 |  | Baosheng Media Group | $3.57 M | China |
| 64 |  | Marin Software | $2.86 M | USA |
| 65 |  | Direct Digital Holdings | $2.27 M | USA |
| 66 |  | Starbox Group | $1.13 M | Malaysia |
Largest advertising companies by market cap
