Firefly Communications was on the ascendant again - up from ninth in 2006 to third this time around.
So, does the agency have its sights set on the top next year? CEO Claire Walker denies there is such a plan in place, but she does have a few staff-pleasing tricks up her sleeve - such as the introduction of singing lessons.
Bite Communications (58th), Naked Communications (50th) and PPS Group (16th) all entered for the first time this year. Others included Consolidated (27th), Lexis PR (68th), Haygarth (52nd), Lansons Communications (40th) and Trimedia Communications (76th).
Lansons CEO Tony Langham shows no bitterness about falling from 15th. 'We're in the top 50 - unlike Haymarket,' he jibes, referring to PRWeek's publisher.
Just one PR company - Hill & Knowlton - made it into the Sunday Times list for mid-sized companies. CEO Sally Costerton admits it might have something to do with the glitzy in-house bar.