KGHM Polska Miedź S.A., commonly known as KGHM, is a Polish multinational mining corporation headquartered in Lubin, Lower Silesia, Poland. Founded in 1961 as a state enterprise, the company is considered a major global producer of copper and silver. Since 1997, it has been listed on the Warsaw Stock Exchange. The company is also a component of the WIG30 stock market index. Currently, KGHM employs around 34,000 people worldwide and operates 9 open-pit and underground mines in Poland, Canada, the United States and Chile. KGHM produces key global resources including copper, copper sulphate, gold, silver, nickel, nickel sulphate, molybdenum, rhenium, lead, sulphuric acid, selenium, platinum group metals. There has been controversy where the company had dumped toxic waste into the Oder river illegally, causing a massive ecological disaster. The dumping of industrial wastewater which had a higher than normal salt content allowed the proliferation of Prymnesium parvum, a species of algae responsible for the 2022 Oder environmental disaster. Wikipedia