The story
The company was created in August 1945 as Urban development office of Upper-Dnieper basin of GlavMostStroi of People's Commissariat of Communication Roads (MostoStroi #1) by the declaration of the State Defense Committee and the People's Commissariat of Communication Roads (Transportation). The main office was established in Kyiv.
In 1993 the company was reorganized into Mostobud.
From Wikipedia’s article on Mostobud, shared under CC BY-SA 4.0.3