The company had expenses of RON86.7 million last year, up 9.6%.
Businessman Marian Petre Milut owns 82.8% of Prefab through firm Romerica International and regional investment fund SIF Muntenia (SIF4. RO) controls 13% of the shares.
Prefab last traded in Bucharest on February 12 at RON2.25 a share, up 4.6%.