| |
- Aegis Group
- Ally & Gargano (1963–1991)
- Anomaly
- BBDO
- Bernstein-Rein
- Bozell Worldwide (founded in 1921)
- Cordiant Communications Group
- CORE (advertising media) (founded in 1995) in St. Louis, Missouri
- Crowell Advertising (founded in 1987) in Salt Lake City, Utah
- Davis Elen Advertising (founded in 1948) in Los Angeles, California
- DDB Worldwide
- Della Femina, Travisano and Partners
- Dentsu
- DeVito/Verdi
- D'Arcy Masius Benton & Bowles (1906–2002)
- Doyle Dane Bernbach
- DraftFCB
- Eric Mower and Associates, in Syracuse, NY
- Euro RSCG
- Fallon Worldwide
- Goodby, Silverstein & Partners
- Grey EMEA
- Grey Global Group
- GSD&M Idea City
- Havas
- Interpublic Group
- Jellyvision
- la comunidad
- London Creative (founded 1997)
- Lord & Thomas (founded 1873, became Foote, Cone & Belding in 1942)
- Mother Advertising
- N. W. Ayer & Son (1869–2002)
- Neathawk Dubuque & Packett (founded in 1963)
- Ogilvy & Mather
- Omnicom Group
- Pappas Group
- Publicis Groupe
- PubliGestion
- Saatchi & Saatchi
- Scali, McCabe and Sloves (founded 1967, acquired by Lowe Worldwide in 1993)
- Sapient Corporation
- StrawberryFrog
- Tarek Nour Communications (founded in 1979) in Giza, Egypt
- TAXI
- TBWA Worldwide
- Tombras Group
- Wieden+Kennedy
- WPP Group
- Young & Rubicam
- Zubi Advertising Services
- The Martin Agency
By 2005 worldwide revenue
| Rank |
Agency |
Headquarters |
Revenue (US$ millions) |
| 1 |
Omnicom Group |
New York City |
10,481.1 |
| 2 |
WPP Group |
London |
10,032.2 |
| 3 |
Interpublic Group of Companies |
New York City |
6,700 |
| 4 |
Publicis Groupe |
Paris |
5,107.2 |
| 5 |
Dentsu* |
Tokyo |
2,887.8 |
| 6 |
Havas |
Suresnes, France |
1,808.0 |
| 7 |
Aegis Group |
London |
1,577.6 |
| 8 |
Hakuhodo DY Holdings* |
Tokyo |
1,364.0 |
| 9 |
Asatsu-DK |
Tokyo |
444.8 |
| 10 |
MDC Partners |
Toronto/New York City |
443.5 |
| 11 |
Sapient |
Cambridge, Massachusetts |
358.4 |
| 12 |
Digitas |
Boston |
340.5 |
| 13 |
aQuantive |
Seattle |
258.4 |
| 14 |
Aspen Marketing Services |
West Chicago, Illinois |
229.0 |
| 15 |
Cheil Communications |
Seoul |
210.7 |
| 16 |
Monster Worldwide |
New York City |
168.6 |
| 17 |
WB Doner & Company |
Southfield, Michigan |
164.3 |
| 18 |
Cossette Communication Group |
Quebec City |
164.1 |
| 19 |
Richards Group |
Dallas |
148.0 |
| 20 |
Bartle Bogle Hegarty* |
London |
128.1 |
| 21 |
M&C Saatchi |
London |
123.3 |
| 22 |
Chime Communications PLC |
London |
114.2 |
| 23 |
Merkle |
Lanham, Maryland |
108.0 |
| 24 |
Wieden+Kennedy* |
Portland, Oregon |
102.9 |
| 25 |
RPA| |
Santa Monica |
102.2 |
| 26 |
Cramer-Krasselt |
Chicago |
96.2 |
| 27 |
ChoicePoint Precision Marketing |
Alpharetta, Georgia |
91.5 |
|
