Historical stock prices for Robbins & Myers (RBN). Robbins & Myers, Inc. is a supplier of engineered equipment and systems for critical applications in global energy, industrial, chemical and pharmaceutical markets. The Company operates in two segments: Energy Services and Process & Flow Control. Its Energy Services business segment, which includes T-3, designs, manufactures, markets, repairs and services equipment and systems used in upstream oil and gas exploration and recovery, production and completion, pipeline transmission infrastructure and a variety of other industrial applications. Its Process and Flow Control business segment designs, manufactures and services glass-lined reactors and storage vessels, industrial progressing cavity pumps, mixing equipment, and related products such as grinders for applications involving the flow of viscous, abrasive and solid-laden slurries and sludge, standard and customized fluid-agitation equipment and systems.