The New York-based digital advertising firm AppNexus is upping its commitment to mobile advertising, the company announced today. More specifically, its mobile buy-side offering, which is in beta with clients including Collective, CPX Interactive, FlxOne, and Matomy, is expected to be available to all AppNexus customers this summer. The beta product is already integrated with mobile supply sources such as Nexage, Smaato, and MoPub. AppNexus raised a $75 million Series D round of financing led by Technology Crossover Ventures in January.

New York-based AppNexus has a lot to crow about, given how quickly it has grown over the last five years. The question is: What happens now?

AppNexus has raised $50 million in Series C funding. Investors in the round include Microsoft, a long time customer. All of AppNexus’s Series B VC backers including Venrock, Kodiak Venture Partners and First Round Capital invested in the C round. AppNexus is a New York-based maker of a virtualized cloud computing platform for online advertising applications.

AppNexus Inc., a New York-based maker of a virtualized cloud computing platform for online advertising applications, has raised $5 million in third-round funding. Kodiak Venture Partners led the round, and was joined by fellow return backers Venrock and First Round Capital. Previous investor was not listed.

AppNexus Inc., a New York-based maker of a virtualized cloud computing platform for online advertising applications, has raised around $8 million in Series B funding, according to a regulatory filing. Backers include First Round Capital, Khosla Ventures, Kodiak Venture Partners and Venrock. www.appnexus.com