In time, the enterprise grew, to finally in the first decade of the XX century become the second largest industrial plant within the Pomeranian province.

In 1945 the plant began its activity as a Polish enterprise. Between 1956 and 1971 it greatly developed. A dynamic growth in demand for railway machines and devices led to numerous and big investments which positioned the factory among the most modern ones in the country.

Until July 31st 1991 it was an enterprise of the Polish State Railways (PKP). After separation from the PKP, ZNTK became an individual company, and then a sole trader of the state treasury. Its shares were introduced into the National Investment Funds. Due to the restructuring in April 2000, a Fabryka Pojazdów Szynowych (FPS) company was created. In September 10th 2003 the MTR company from Warsaw took over the business from the bankrupt FPS and continued the activity, becoming the factory owner in September 15th 2005. In April 4th 2006 the MTR company changed its name to ZPS Sp. z o. o. Its other identification details remained the same.