Online ad network, PubMatic has raised $45 million in a funding round led by August Capital, with existing investors Draper Fisher Jurvetson, Nexus Venture Partners, Helion Ventures and Silicon Valley Bank, also participating, reports AllThingsD. With this the company has raised $63 million since launch. Pubmatic had last raised $7.5 million from existing investors in 2010.

In an interview with the website, Pubmatic CEO Rajeev Goel said that the company intends to utilise the funding to strengthen its balance sheet and to support targeted M&A (merger and acquisition) activities. He said that the company reviews 2-4 inbound opportunities on a monthly basis, loooking for interesting technology platforms and teams.

Earlier this year, the company launched PubLink, an enterprise app marketplace for premium publishers- a set of open APIs(application programming interfaces) and pre-packaged integrations which allow publishers to make use of PubMatic’s selling platform as a single platform to access services and their partners in real time, consolidating their third party services and aggregated point solutions into a single platform.

Pubmatic had  acquired MobiPrimo, a mobile development technology firm which focuses on providing mobile platform integration support to companies like Nokia, Motorola and Microsoft. Before that, Pubmatic acquired an ad network optimization company ReviNet in May 2011, to get access to 57 US publishers including The Christian Science Monitor, A.H. Belo, Boston Herald, The Sporting News, and others and extend PubMatic’s reach to 400 million users globally.

PubMatic is a sell-side ad network and focuses on maximizing revenue and control for publishers, as opposed to demand-side networks that focus on optimizing audience deliverables to agencies. It allows  publishers to make their advertising inventory available for sale to advertisers.

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