Sandridge Mississippian Trust II

Plains All American Pipeline, L.P. is a publicly traded master limited partnership (“MLP”) engaged in the transportation, storage, terminalling and marketing of crude oil, refined products and liquefied petroleum gas and other natural gas related petroleum products (together "NGL"). Through our general partner interest and majority equity ownership position in PAA Natural Gas Storage, L.P. (NYSE: PNG), we are also engaged in the development and operation of natural gas storage facilities. We own and operate a diversified portfolio of strategically located assets that play a vital role in the movement of U.S. and Canadian energy supplies. On average we handle over 3 million barrels per day of crude oil, refined products and NGL through our extensive network of assets located in key North American producing basins and transportation gateways. As an MLP, we make quarterly distributions of our available cash to our Unitholders. Since our initial public offering in 1998, we have increased our quarterly distribution by 150% to its current level (with February 2013 distribution) of $0.56250 per unit, or $2.25 per unit on an annualized basis. It is our goal to increase our distribution to Unitholders over time through a combination of internal and acquisition-oriented growth. Our common units are traded on the New York Stock Exchange under the symbol "PAA." We are headquartered in Houston, Texas

Targa Resources Corp. provides midstream natural gas and natural gas liquids services. It also provides gathering, storing, and terminaling crude oil and storing, terminaling, and selling refined petroleum products. It operates through the following business segments: Gathering and Processing, and Logistics and Marketing. The Gathering and Processing segment includes assets used in the gathering of natural gas produced from oil and gas wells and processing this raw natural gas into merchantable natural gas by extracting NGLs and removing impurities; and assets used for crude oil gathering and terminaling. The Logistics and Marketing segment includes all the activities necessary to convert mixed NGLs into NGL products and provides certain value added services such as storing, fractionating, terminaling, transporting and marketing of NGLs and NGL products, including services to LPG exporters; storing and terminaling of refined petroleum products and crude oil and certain natural gas supply and marketing activities in support of its other businesses. The company was founded on October 27, 2005 and is headquartered in Houston, TX.