Video supply side ad platform Altitude Digital has raised $30 million from FastPay, a provider of liquidity and financial workflow solutions to the media industry. The new funds will be used for growing Altitude's ARENA platform and data infrastructure, expanding mobile capabilities and growing internationally. The new financing brings total capital raised to date to $45 million.

With the sale of LiveRail to Facebook last year, Altitude believes it's now the largest independent video supply side ad platform in the market. Altitude is among the top 10 video ad platforms per comScore and Quantcast. Last Fall Altitude said it was on track to double its revenues in 2014 to approximately $50 million (update, actual revenues were $60 million, with 2015 run-rate of $100 million) and works with over 1,800 content publishers.

Despite all the consolidation in the video advertising space, we've seen a flurry of new financings in the past few months, including Teads.tv ($30 million), Innovid ($10 million), Pixability ($18 million) and clypd ($19.4 million) among others.

(Note: Altitude Digital is a Headline Partner for the 5th annual VideoNuze Online Video Advertising Summit on June 16th in NYC. Early bird discounted tickets are available with all registrants eligible to win a 55-inch TCL Roku TV.)