At the beginning of the 1870s, Arnold Elbertzhagen and Karl Glassner established an engineering company in Ostrava. Several years later, Eduard Tatzel founded Opavska strojirna a slevarna (Opava Engineering Works and Foundry).
1948
In January 1948, the construction of a new plant on Tesinska Street in Opava was approved. On August 28, the foundation stone of the national enterprise Ostravska strojirna a slevarna (Ostrava Engineering Works and Foundry) was ceremonially laid. At the beginning of 1949, the OSTROJ trademark was registered for the first time.
1977
OSTROJ was established as a center for the development and manufacture of machinery for underground coal mining. In 1977, it officially became part of the Ostravsko-karvinske doly (OKD) group.
1992–1999
On May 1, 1992, Ostroj Opava was established as a joint-stock company, which was subsequently privatized through voucher privatization in the following years. In 1999, the shareholder structure stabilized, with Vladimir Trochta acquiring a controlling stake.
2005–2015
On August 1, 2005, the company’s name was changed to OSTROJ a.s. During this period, new production halls were constructed, existing facilities renovated, and the administrative building modernized.
Present Day
We build on our traditions while embracing the future. In 2023, we introduced new product lines that bring OSTROJ into the spotlight—emerging from underground mining towards the surface, tunnel construction, forging production, and the implementation of automated conveyor lines.
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