Shares of the construction and mining equipment maker Terex surged Monday after Bloomberg reported the Westport, Conn.-based company is in talks to merge with a Finland rival. Photographer: Simon Dawson/Bloomberg Photo: Simon Dawson / Bloomberg Westport-based Terex, a multinational manufacturer of heavy construction equipment with more than 15,900 employees working at 50 manufacturing plants in North America, South America, Europe, Asia and Australia, is involved in renovating Westport's popular Levitt Pavilion.