The combined agency, under the Draft name, will have 140 employees and billings estimated at $29 million from clients like Compaq Canada.
Lewis specializes in consumer and food service advertising with billings estimated at $8 million from clients like Nestle.
The combined agency, to be called Odyssey, will have 20 employees and revenue estimated at $3 million from clients like Novartis.
The combined agency will have 75 employees and revenue estimated at $10 million from clients like Lucent Technologies.
Amazon has 20 employees and billings estimated at $25 million from clients like Procter & Gamble.
Capita, which has 400 employees and projected revenue estimated at $70 million from clients like Xerox, will operate as an autonomous unit of Draft.
Frese, with 100 employees, has billings estimated at $50 million from clients like Mars.
Sweeney has 25 employees and billings estimated at $18 million from clients like Pfizer Inc.
Buntin, founded in 1972, has 122 employees and billings estimated at $85 million from clients like the Kroger Company.
Lighthouse has about 1,200 employees and revenue estimated at $158.9 million from clients like America Online and Microsoft.