ÖNACE 43: Specialised construction activities
Section: Construction. Assignment by Statistics Austria under ÖNACE 2025, not from the register.
Statistics Austria assigns 20,810 active companies in the register to ÖNACE division 43: Specialised construction activities (as of 5 Nov 2026).
6,465 of them have a company page on firmenbuchdaten.at. The shares below refer to these 6,465.
Most have their seat in: Lower Austria 21 %, Vienna 20 %, Upper Austria 16 %.
Most common legal forms: GmbH 95 %, KG 4 %, OG 0 %.
Places with the most companies: Wien (1,299), Graz (109), Linz (101), Salzburg (98), Innsbruck (68).
6,311 have filed annual accounts with a size class, 136 of them as medium-sized or large.
The largest class is 43.21-9 Other electrical installation with 3,886 companies.
Largest classes
- 43.21-9 Other electrical installation: 3,886
- 43.22-0 Plumbing, heat and air-conditioning installation: 3,849
- 43.34-1 Painting: 1,617
- 43.31-0 Plastering: 1,579
- 43.32-1 Wood joinery installation: 1,091
Specialised construction activities: companies, larger first
- SAR Anlagenbau GmbHFN 330076g · Amstetten · Large (G)
- HTB Baugesellschaft m.b.H.FN 42441p · Arzl im Pitztal · Large (G)
- EQUANS Gebäudetechnik GmbHFN 100305h · Wien · Large (G)
- Bernegger GmbHFN 118645d · Molln · Large (G)
- KONE AGFN 126942f · Wien · Large (G)
- eww Anlagentechnik GmbHFN 173488f · Wels · Large (G)
- Fiegl & Spielberger GmbHFN 206208y · Innsbruck · Large (G)
- EQOS Energie Österreich GmbHFN 211083t · Wien · Large (G)
- Vienna Airport Technik GmbHFN 242033g · Schwechat · Large (G)
- MAIN Technische Dienstleistung- GmbHFN 258639b · Wien · Large (G)
- Bauschutz GmbH & Co. KGFN 27200a · Wels · Large (G)
- Molin-Industrie-Inbetriebnahme- Montage-Gesellschaft m.b.H. & Co. KG.FN 27453y · Wels · Large (G)
- Schindler Aufzüge und Fahrtreppen GmbHFN 291811i · Wien · Large (G)
- Weber Beton Logistik GmbHFN 403248m · Inzing · Large (G)
- Bauservice-Fuhs Gesellschaft m.b.H.FN 47211d · Bisamberg · Large (G)
- PKE Electronics GmbHFN 488160h · Wien · Large (G)
- PKE Gebäudetechnik GmbHFN 488210g · Wien · Large (G)
- ZAGREB-MONTAZA d.o.o.FN 542588z · Sibenik · Large (G)
- ETS Egger GmbHFN 655687x · Irdning-Donnersbachtal · Large (G)
- STRABAG BMTI GmbHFN 83609f · Wien · Large (G)
- Rubner Holzbau GmbHFN 84010w · Ober - Grafendorf · Large (G)
- ETECH Schmid u. Pachler Elektrotechnik GmbH & Co KGFN 214211t · Linz · Large (G)
- Gahleitner Installationen Gesellschaft m.b.H.FN 114690m · Kopfing im Innkreis · Medium (M)
- AST Eis- und Solartechnik GmbHFN 48539g · Höfen · 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.