On Friday, Pennsylvania-based Conestoga Capital Advisors disclosed selling 855,435 shares of Vertex (VERX +0.43%), an estimated 24.8milliontransactionbasedonaveragepricesinthethirdquarter.WhatHappenedAccordingtoanSECfilingreleasedFriday,ConestogaCapitalAdvisorsreduceditspositioninVertexby855,435sharesduringthequarterendedSeptember30.Theestimatedvalueofthesharessoldwasapproximately24.8 million, calculated using the average closing price from July 1 to September 3 ...