2. GMMB

2. GMMB

$123,506,610
GMMB is perhaps best known for its political work on behalf of Democratic candidates, most notably President Barack Obama. The Washington, D.C.-based strategic communications firm was behind both positive and negative campaign ads for the presidential candidate, including one ad that attacked Republican nominee Mitt Romney’s controversial “47 percent” comments. Outside of its political work, GMMB’s clients have also included nonprofits like the Save Darfur Coalition and trade associations, including CTIA — The Wireless Association.

Top clients:

  • American Beverage Association: $55,243,724
  • Cellular Telecom & Internet Association: $40,460,725
  • Society for Human Resource Management: $15,460,652
  • American Public Transportation Association: $7,199,108
  • National Cable & Telecommunications Association: $5,142,401