Shares in Waters rose 12.36 percent for the tracking period ended Tuesday to lead all gainers in the BCW Index. The firm posted fourth-quarter revenue growth of 3 percent this week, but its profits rose 9 percent, beating market estimates.

GE and Harvard Bioscience were the two firms in the Index to drop more than 5 percent for the week, with GE falling 5.67 percent and Harvard Bio declining 5.34 percent. Last week, GE reported that its fourth-quarter profits fell 46 percent, due to losses associated with the sale of its insurance business.