OpenX Keeps On Growing, Raises $10 Million More

We’ve talked about online ad server OpenX quite a bit in the past, and for good reason. The company, formerly known as Openads, is led by former AOL CEO Jonathan Miller (Chairman) and ex-Yahoo exec Tim Cadogan (CEO) and has in the past shown it’s serious about growing fast and making money in the process.

More recently, we covered the launch of OpenX Market, an alternative online ad exchange platform operated by the Pasadena, CA-based company.

Today, OpenX is announcing that it has raised a Series C venture capital round to the tune of $10 million, which brings the total of funding raised by the company to a healthy $30+ million. Worth noting is that the extra financing is coming from a new lead investor, which is increasingly rare in these troubled times: DAG Ventures led the round, with existing investors Accel Partners, Index Ventures, Mangrove Capital and First Round Capital participating. Jonathan Miller, who recently was appointed as the new Chief Digital Officer of News Corp. also chipped in.

OpenX CEO Tim Cadogan in a brief interview didn’t want to go into detail about the valuation of the company after this round, other than that he was pleased with it. He did say that there was still large part of the Series B round ($15.5 million, closed in December 2007) left on the company’s back accounts and that there was no real need for them to raise money, “which of course is always the best time to raise money”.

Cadogan also told me the company is focused on making OpenX Market a success and to continuously add new publishers to its open ad technology platform Ad Server. To date, it has attracted over 38,000 publishers representing 150,000 websites for the latter, and Cadogan also informed me that Market has doubled since it launched a little over a month ago, with a current monthly run rate of over two billion impressions.

More strong figures: OpenX claims that from December 2008 to April 2009, the monthly run rate of impressions for the OpenX Hosted product grew more than 500% to 7.5 billion impressions, with the number of sign-ups for the new product now exceeding 10,000 in six months since its debut on the market.

(Disclosure: we use OpenX to power part of the ad serving here on the TechCrunch website)