KOP - Koppers Holdings up 9% post Q1 results; raises FY19 EPS guidance May, 03 2019 01:27 PM Koppers Holdings Inc. Koppers Holdings (KOP +9.2%) reported Q1 net sales growth of 7.1% Y/Y to $424.9M, driven by the company's wood-preservation businesses.More news on: Koppers Holdings Inc., Earnings news and commentary, Stocks on the move, Read more ...