Anadarko Petroleum Corp.has been revealed as the seller of some natural gas-weighted properties in the Pinedale Anticline and Jonah field to a unit of Vanguard Natural Resources LLC for $581 million (see Shale Daily, Dec. 30, 2013). Vanguard confirmed the seller in a required Securities and Exchange Commission filing; it was advised on the sale by Tudor, Pickering, Holt & Co. Inc. The transaction would nearly double Vanguard's reserves, with daily output increasing by 55%.