| 1. | HL Group | 2001 | Hamilton South and Lynn Tesoro, founding partners | N/A | N/A | N/A |
| 2. | Rubenstein | 1953 | Howard Rubenstein, founder and chairman; Steven Rubenstein, president | N/A | 190 | 3 |
| 3. | DKC | 1991 | Sean Cassidy, US CEO | $51M | 250 | 1 |
| 4. | PMK*BNC | 2010 | Cindi Berger and Michael Nyman, co-chairmen/CEOs; Chris Robichaud, CEO | N/A | 300+ | 8 |
| 5. | Finsbury | 1994 | Michael Gross, CEO | N/A | 200+ | 11 |
| 6. | 42West | 2004 | Leslee Dart, Amanda Lundberg, Allan Mayer, principal partners | N/A | 100 | 13 |
| 7. | Hiltzik Strategies | 2008 | Matthew Hiltzik, founder, president and CEO | N/A | 22 | 16 |
| 8. | Kekst and Company | 1970 | Jeremy Fielding, president and CEO | N/A | 70 | 7 |
| 9. | Edelman | 1952 | Richard Edelman, president and CEO; Russell Dubner, president and CEO US | $855M | 780 | 5 |
| 10. | The Magrino Agency | 1992 | Susan Magrino, chairman and CEO; Allyn Magrino, president and COO | N/A | N/A | 48 |
| 11. | M18 | 2010 | Michael Tavani and Meghan McGinnis, co-founders | N/A | N/A | 28 |
| 12. | Optimist Consulting | 2016 | Leslie LeCount, Paul Lerner, Scott Cooke, founding partners | N/A | N/A | N/A |
| 13. | Joele Frank | 2000 | Joele Frank, managing partner; Matthew Sherman, president | N/A | 110 | 6 |
| 14. | Hill & Knowlton Strategies | 1927 | Beth Balsam, US CEO | N/A | N/A | N/A |
| 15. | Weber Shandwick | 2001 | Jack Leslie, chairman; Andy Polansky, CEO; Gail Heimann, president | N/A | 4,000 | 2 |
| 16. | Brunswick Group | 1987 | Steven Lipin, senior partner | N/A | N/A | 34 |
| 17. | Alison Brod Marketing & Communications | 1995 | Alison Brod, founder and CEO | N/A | N/A | 15 |
| 18. | Havas PR | 1976 | Marian Salzman, CEO | N/A | N/A | N/A |
| 19. | Berman Group | 2006 | Sarah Berman, founder and president | N/A | 47 | 9 |
| 20. | Burson-Marsteller | 1953 | Donald Baer, worldwide chairman and CEO | $400M | N/A | 17 |
| 21. | Global Strategy Group | 1995 | Jon Silvan, founding partner and CEO; Jefrey Pollock, founding partner and president | $31M | 86 | 14 |
| 22. | Prosek Partners | 1991 | Jennifer Prosek, founder and CEO | $30M | 100 | 24 |
| 23. | Ruder Finn | 1938 | Kathy Bloomgarden, CEO | $73.8M | 565 | 10 |
| 24. | Sard Verbinnen | 1992 | George Sard, chairman and CEO; Paul Verbinnen, president | N/A | 150 | 19 |
| 25. | Goldin Solutions | 2010 | Davidson Goldin, founder | N/A | 12 | 20 |
| 26. | SKDKnickerbocker | 2004 | Josh Isay and Jennifer Cunningham, managing directors | N/A | 95 | 21 |
| 27. | BerlinRosen | 2005 | Valerie Berlin and Jonathan Rosen, principals and co-founders | N/A | N/A | 4 |
| 28. | APCO Worldwide | 1984 | Margery Kraus, founder and executive chairman; Nelson Fernandez, chairman North America and managing director New York | N/A | N/A | 45 |
| 29. | 5W Public Relations | 2003 | Ronn Torossian, founder and CEO | $25.2M | 140 | 30 |
| 30. | The Door | 2008 | Lois Najarian O'Neill, co-founder and president; Charlie Dougiello, co-founder and CEO | $6.2M | 38 | N/A |
| 31. | Sunshine Sachs | 1991 | Ken Sunshine, Shawn Sachs, Heather Lylis, Keleigh Thomas Morgan, partners | N/A | 162 | 29 |
| 32. | Quinn PR | 1987 | Florence Quinn, founder and president | N/A | 100 | N/A |
| 33. | PR Consulting | 1997 | Pierre Rougier, founder; Sylvie Picquet Damesme, NY partner | N/A | N/A | 41 |
| 34. | ID-PR | 1993 | Kelly Bush Novak, founder and CEO | N/A | 100 | 32 |
| 35. | Kwittken | 2006 | Aaron Kwittken, founder/CEO; Jason Schlossberg, chief creative officer | N/A | 70 | N/A |
| 36. | N6A | 2010 | Matt Rizzetta, founder, president and CEO | N/A | N/A | N/A |
| 37. | Mode PR | 2008 | Amanda Carter, founder and president | N/A | 7 | N/A |
| 38. | Cultural Counsel | 2015 | Adam Abdalla, founder and president | N/A | 10 | N/A |
| 39. | Becca PR | 2006 | Becca Parrish, founder | N/A | N/A | 23 |
| 40. | Nasty Little Man | 1992 | Steve Martin, founder and owner | N/A | N/A | 36 |
| 41. | DiGennaro Communications | 2000 | Samantha DiGennaro, president | N/A | N/A | N/A |
| 42. | Sharp Communications | 2000 | James Brodsky, president | N/A | N/A | N/A |
| 43. | Marino | 1993 | Francis C. Marino, president and CEO | N/A | 40 | 12 |
| 44. | The Peggy Siegal Company | 1984 | Peggy Siegal, founder | N/A | N/A | 42 |
| 45. | Nadine Johnson Inc. | 1995 | Nadine Johnson, president | N/A | 50+ | 27 |
| 46. | KCD | 1984 | Ed Filipowski, worldwide president and chief strategist; Julie Mannion, president of creative services | N/A | N/A | 33 |
| 47. | Kaplow Communications | 1991 | Liz Kaplow, president and CEO | N/A | 75 | 18 |
| 48. | NJF, an MMGY Company | 1987 | Nancy J. Friedman, founder and creative director | N/A | 50 | N/A |
| 49. | Nicholas & Lence Communications | 2007 | Cristyne Nicholas, CEO; George Lence, president | N/A | 14 | 38 |
| 50. | Boneau/Bryan-Brown | 1991 | Chris Boneau and Adrian Bryan-Brown, co-founders | N/A | 17 | 47 |