PR holding company Next Fifteen Communications Group has acquired an 80% stake in Washington digital public affairs agency Connections Media for initial consideration of $1.85M.

CM, which has worked for New York Mayor Mike Bloomberg's campaigns and corporate clients like PepsiCo and Google, was founded by Jonah Seiger, who was a co-founder of digital PA pioneer Mindshare Internet Campaigns and a former aide to Rep. Ed Markey (D-Mass.).

Next Fifteen CEO Tim Dyson said the move helps NF speed its growth from a "PR only group into a full service digital and social communications group."

The firm had revenues of $2.65M in 2012 providing services like strategy, design, advertising and social media.

Next Fifteen, which owns firms like Text 100, M Booth and The Outcast Agency, said owners Seiger, along with chief technology officer Phil Lepanto and chief creative officer Andy Weishaar will remain with the company.

NF also owns Washington-based 463 Communications, a tech-savvy PR unit focused on policy and government communications.