ÖNACE 42: Civil engineering
Section: Construction. Assignment by Statistics Austria under ÖNACE 2025, not from the register.
Statistics Austria assigns 699 active companies in the register to ÖNACE division 42: Civil engineering (as of 5 Nov 2026).
256 of them have a company page on firmenbuchdaten.at. The shares below refer to these 256.
Most have their seat in: Upper Austria 23 %, Lower Austria 20 %, Vienna 15 %.
Most common legal forms: GmbH 95 %, KG 4 %, AG 1 %.
Places with the most companies: Wien (38), Graz (7), Linz (7), Klagenfurt am Wörthersee (5), Salzburg (4).
252 have filed annual accounts with a size class, 36 of them as medium-sized or large.
The largest class is 42.11-0 Construction of roads and motorways with 205 companies.
Largest classes
- 42.11-0 Construction of roads and motorways: 205
- 42.21-0 Construction of utility projects for fluids: 152
- 42.22-0 Construction of utility projects for electricity and telecommunications: 112
- 42.99-0 Construction of other civil engineering projects n.e.c.: 101
- 42.91-0 Construction of water projects: 83
Civil engineering: companies, larger first
- EURAILPOOL GmbHFN 245085w · Ismaning · Large (G)
- Swietelsky Tunnelbau GmbH & Co KGFN 253391i · Salzburg · Large (G)
- Ploier + Hörmann Bau GmbHFN 97992g · Traun · Large (G)
- Felbermayr Bau GmbH & Co KGFN 227276f · Wels · Large (G)
- Anton Traunfellner Gesellschaft m.b.H.FN 313095i · Scheibbs · Large (G)
- THYSSEN SCHACHTBAU GMBHFN 346292d · Mülheim an der Ruhr · Large (G)
- COGEIS S.p.A.FN 354531w · Quincinetto · Large (G)
- Bauunternehmung Granit Gesellschaft m.b.H.FN 535609k · Graz · Large (G)
- STRABAG AGFN 61689w · Spittal an der Drau · Large (G)
- Gebrüder Haider, Bauunternehmung Gesellschaft m.b.H.FN 118160s · Großraming · Large (G)
- INTEGRAL Montage und Anlagentechnik GmbHFN 147373a · Achau · Large (G)
- Hilti & Jehle GmbHFN 165641s · Feldkirch · Large (G)
- Held & Francke Baugesellschaft m.b.H.FN 198764a · Linz · Large (G)
- Pittel + Brausewetter Gesellschaft m.b.H.FN 228135v · Wien · Large (G)
- Swietelsky AGFN 83175t · Linz · Large (G)
- HOCHTIEF Infrastructure GmbHFN 417357k · Essen · Large (G)
- Goldschmidt Thermit Railservice (Österreich) GmbHFN 103611w · Wien · Medium (M)
- G. u. G. Spindler Bau- gesellschaft m.b.H.FN 103739h · Ampflwang im Hausruckwald · Medium (M)
- Uhl Bau GmbHFN 107343h · Wiener Neustadt · Medium (M)
- Dipl.Ing. A. Winkler & Co Baugesellschaft m.b.H.FN 111871t · Wien · Medium (M)
- Berndorf Metall- und Bäderbau GmbHFN 149227b · Berndorf · Medium (M)
- SPL Powerlines Austria GmbHFN 162991v · Wolkersdorf im Weinviertel · Medium (M)
- Partl & Vollmann Bau GmbHFN 233524v · Leibnitz · Medium (M)
- Implenia Österreich GmbHFN 245047p · Salzburg · Medium (M)
Datenquelle: Statistik Austria - data.statistik.gv.at (Statistics Austria), register number to ÖNACE assignment, CC BY 4.0, as of 5 Nov 2026. Source: Austrian company register (Firmenbuch), Republic of Austria, represented by the BMJ, open data under CC BY 4.0.