, an ad network developed for Twitter, reportedly has raised $5 million in new funding and named a new CEO. GRP Partners led the funding round, which also included Greycroft Partners and LowerMyBills founder Matt Coffin. The new CEO is Arnie Gullov-Singh, who formerly held the position of executive VP of product, technology and operations at Fox Audience Network. Founder former CEO Sean Rad will become President.

The L.A.-based startup matches advertisers with popular Twitter accounts such as those of artists and other celebrities to send sponsored Tweets to their followers. Billboard profiled the company earlier this year.