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LOMA NEGRA COMPAÑIA INDUSTRIAL ARGENTINA www . lomanegra . com . ar Loma Negra Compañía Industrial Argentina is a leader in the cement industry of Argentina , with ties as well to Paraguay . Its origins date back to 1926 , when Argentinian Alfredo Fortabat discovered limestone , a key ingredient in the production of cement , in Loma Negra , Argentina . According to NYSE , it made $ 1.097bn in proceeds . Under CEO Sergio Faifman , it currently employs 3,258 people , according to NASDAQ , and had a share price of $ 19 , with 119,205,298 shares outstanding .