New York - Online company AOL says it is buying highly trafficked news website Huffington Post for $315m in a deal that will put co-founder Ariana Huffington in charge of all AOL content. Founded in 2005, Huffington Post now claims 25 million unique visitors a day. It is owned by Ariana Huffington, Kenneth Lerer and a group of other investors. AOL will pay $300m of the purchase price in cash. Ariana Huffington will be named president and editor-in-chief of The Huffington Post Media Group, which will include all Huffington Post and AOL content, including Engadget, TechCrunch, MapQuest, Patch and more.