Up to the outbreak of the First World War CNT had built several ships, both merchant such as Belvedere and military such as the cruiser Saida for the Austro-Hungarian Navy (KuK).
At the outbreak of war between Italy and Austria in 1915 the largely Italian workforce abandoned the shipyard, while the site itself was too close to the front line to continue to operate.
After World War I, the Trieste region was ceded to Italy and the firm built naval and commercial vessels for its new host country.
In 1929 CNT was merged with another Italian shipbuilding firm, Stabilimento Tecnico Triestino to form Cantieri Riuniti dell' Adriatico (CRDA).
CRDA Monfalcone's shipyards remained active well into the postwar period, becoming part of the Fincantieri group in 1984.