 Shares of Evoqua Water Technologies Corp. AQUA, 2.04 soared 14.6 toward a nine-month high in premarket trading Monday, after the water and wastewater treatment company agreed to be acquired by Xylem Inc. XYL, 1.43 in an all-stock deal valued at 7.5 billion. Xylems stock tumbled 9.7 toward a three-month low. 