Don-Nan Pump and Supply Co., Inc. (“Don-Nan”)

Don-Nan engages in the manufacture, wholesale, and repair of subsurface pump products for oil and gas producers in the United States and internationally. The company offers plungers, subsurface sucker rod and tubing pumps, tubing anchors, and gas separators. It also provides pump repair, well optimization, and web services. In addition, the company, through its stores, offers supplies, such as cement, fence wire, tank gauges, valves and fittings, and tank battery hook-ups. Don-Nan was founded in 1962 and is based in Midland, Texas. The company has warehouses and pump service shops in West Texas, Southeast New Mexico, and through the Rocky Mountain region.

Schlumberger Limited (“Schlumberger”)

Schlumberger supplies technology, integrated project management, and information solutions to the oil and gas exploration and production industries worldwide. The company operates through three segments: Reservoir Characterization Group, Drilling Group, and Production Group. Schlumberger was founded in 1926 and is based in Houston, Texas.

PPHB, LP (“PPHB”)

PPHB is an independent investment banking firm providing financial advisory services exclusively to clients in the oilfield equipment and service industry.