ROSEN, A LEADING LAW FIRM, Encourages Koppers Holdings Inc. Investors With Losses to Inquire About Securities Class Action Investigation – KOP NEW YORK, March 18, 2022 (GLOBE NEWSWIRE) -- WHY: Rosen Law Firm, a global investor rights law firm, continues its investigation of potential securities claims on behalf of shareholders of Koppers...

Weir Offering World-Class Global Pressure Control Solutions and Service HOUSTON, April 30, 2018 (GLOBE NEWSWIRE) -- Weir Oil & Gas, a leading upstream provider of pressure pumping and pressure control equipment and services, today announced it is launching its...