| 1 | Hochtief Infrastructure GMBH | Austria | Wien | Modecenterstraße 17/objekt 2/6. Og | Wien | 1110 | hochtief.***** | 2013 | $30,170,017,077 | 681 | N/A | N/A | FN417357k |
| 2 | Porr AG | Austria | Wien | Absberggasse 47 | Wien | 1100 | porr.***** | 1867 | $6,546,525,482 | 20,665 | N/A | N/A | FN34853f |
| 3 | Swietelsky AG | Austria | Linz | Edlbacherstraße 10 | Oberösterreich | 4020 | swietelsky.***** | 1936 | $3,495,562,649 | 11,910 | N/A | N/A | FN83175t |
| 4 | Strabag AG | Austria | Spittal An der Drau | Ortenburgerstraße 27 | Kärnten | 9800 | strabag.***** | 1929 | $3,088,655,771 | 9,435 | N/A | N/A | FN61689w |
| 5 | Porr Bau GMBH | Austria | Wien | Absberggasse 47 | Wien | 1100 | porr-group.***** | 1989 | $2,556,604,303 | 7,311 | N/A | N/A | FN34160k |
| 6 | Habau Hoch- Und Tiefbaugesellschaft M.B.H. | Austria | Perg | Greiner Straße 63 | Oberösterreich | 4320 | habau.***** | 1988 | $1,783,994,754 | 6,110 | N/A | N/A | FN89381v |
| 7 | Obb-Infrastruktur Aktiengesellschaft | Austria | Wien | Praterstern 3 | Wien | 1020 | oebb.***** | 1842 | $1,358,163,525 | 18,374 | N/A | N/A | FN71396w |
| 8 | Tokyo Electron Europe LIMITED | Austria | Villach | Europastraße 8 | Kärnten | 9500 | N/A | 1994 | $925,424,898 | 30 | N/A | N/A | FN428951k |
| 9 | Leyrer + Graf Baugesellschaft M.B.H. | Austria | Gmünd | Conrathstraße 6 | Niederösterreich | 3950 | leyrer-graf.***** | 1926 | $648,855,931 | 2,343 | N/A | N/A | FN32725a |
| 10 | Time Gold 2006 Kereskedelmi, Szolgaltató Korlatolt Felelössegu Tarsasag (time Gold 2006. H | Austria | Salzburg | Rosa Hofmann-straße 33 | Salzburg | 5020 | N/A | 2006 | $587,046,612 | 11 | N/A | N/A | FN495251k |
| 11 | Doka GMBH | Austria | Amstetten | Josef-umdasch-platz 1 | Niederösterreich | 3300 | doka-ventures.***** | 1958 | $584,087,936 | 1,886 | N/A | N/A | FN105743f |
| 12 | Bauunternehmung Granit Gesellschaft M.B.H. | Austria | Graz | Feldgasse 14 | Steiermark | 8020 | granit-bau.***** | 1973 | $456,638,806 | 1,106 | N/A | N/A | FN535609k |
| 13 | Thyssen Schachtbau GMBH | Austria | Graz | Petersgasse 128a | Steiermark | 8010 | thyssen-schachtbau.***** | 1952 | $410,849,562 | 323 | N/A | N/A | FN346292d |
| 14 | ING. Hans Bodner Baugesellschaft M.B.H. & CO. KG. | Austria | Kufstein | Aloisia Bodner-straße 1 | Tirol | 6330 | bodner-bau.***** | 1913 | $400,370,984 | 1,341 | N/A | N/A | FN23999v |
| 15 | Wayss & Freytag Ingenieurbau AG | Austria | Wien | Nottendorfer Gasse 11 | Wien | 1030 | wf-ingbau.***** | 1972 | $375,931,264 | 961 | N/A | N/A | FN96957i |
| 16 | Held & Francke Baugesellschaft M.B.H. | Austria | Linz | Kotzinastraße 4 | Oberösterreich | 4030 | h-f.***** | 1961 | $344,276,996 | 1,306 | N/A | N/A | FN198764a |
| 17 | Ruhl GMBH | Austria | Kopfing Im Innkreis | Neukirchendorf 9 | Oberösterreich | 4794 | ruhlgroup.***** | 1988 | $317,353,313 | 39 | N/A | N/A | FN438050t |
| 18 | Bilfinger Industrial Services GMBH | Austria | Linz | Lunzer Straße 64 | Oberösterreich | 4030 | bis-austria.***** | 1976 | $307,871,991 | 1,557 | N/A | N/A | FN112286b |
| 19 | Bilfinger Isp Germany GMBH | Austria | Linz | Lunzerstraße 64 | Oberösterreich | 4030 | N/A | 2005 | $305,035,742 | 26 | N/A | N/A | FN547975x |
| 20 | Stäubli Tec-Systems GMBH | Austria | Asten | Bahnhofstraße 1a | Oberösterreich | 4481 | staubli.***** | 1986 | $301,407,510 | 1,086 | N/A | N/A | FN491361s |
| 21 | Handler Bau GMBH | Austria | Bad Schönau | Walter Handler Straße 1 | Niederösterreich | 2853 | handler-group.***** | 1862 | $299,073,522 | 419 | N/A | N/A | FN111387f |
| 22 | Caverion Osterreich GMBH | Austria | Wien | Laxenburger Straße 254 | Wien | 1230 | caverion.***** | 1956 | $294,853,646 | 1,081 | N/A | N/A | FN309157v |
| 23 | Swietelsky Tunnelbau GMBH & CO KG | Austria | Salzburg | Innsbrucker Bundesstraße 61 | Salzburg | 5020 | swietelsky.***** | 2004 | $279,656,962 | 236 | N/A | N/A | FN253391i |
| 24 | Gerstl Bau GMBH & CO KG | Austria | Wels | Kalkofenstraße 25 | Oberösterreich | 4600 | gerstl.***** | 1919 | $271,497,953 | 451 | N/A | N/A | FN25674g |
| 25 | Ostu-Stettin Hoch- Und Tiefbau GMBH | Austria | Leoben | Munzenbergstraße 38 | Steiermark | 8700 | oestu-stettin.***** | 1953 | $245,526,992 | 681 | N/A | N/A | FN77720w |
| 26 | Goldbeck Rhomberg GMBH | Austria | Wolfurt | Konrad-doppelmayrstraße 17 | Vorarlberg | 6922 | goldbeck-rhomberg.***** | 2001 | $245,101,244 | 300 | N/A | N/A | FN209358f |
| 27 | Bachner Elektro GMBH & CO. KG | Austria | Steyr | Bmw-allee 2 | Oberösterreich | 4400 | bachner.***** | 2004 | $229,900,252 | 30 | N/A | N/A | FN242117f |
| 28 | Fröschl AG & CO. KG | Austria | Hall in Tirol | Brockenweg 1 | Tirol | 6060 | froeschl.***** | 1937 | $196,131,305 | 638 | N/A | N/A | FN23496d |
| 29 | Energie AG Oberösterreich Tech Services GMBH | Austria | Linz | Böhmerwaldstraße 3 | Oberösterreich | 4021 | energieag.***** | 2006 | $195,676,832 | 313 | N/A | N/A | FN282573z |
| 30 | Pittel + Brausewetter Gesellschaft M.B.H. | Austria | Wien | Gußhausstraße 16 | Wien | 1041 | pittel.***** | 2002 | $193,449,441 | 683 | N/A | N/A | FN228135v |
| 31 | Brucha Gesellschaft M.B.H. | Austria | Michelhausen | Rusterstraße 33 | Niederösterreich | 3451 | brucha.***** | 1948 | $190,675,033 | 180 | N/A | N/A | FN63618g |
| 32 | Rhomberg Bau GMBH | Austria | Bregenz | Mariahilfstraße 29 | Vorarlberg | 6900 | rhomberg.***** | 1979 | $189,279,925 | 352 | N/A | N/A | FN66571z |
| 33 | European Trans Energy GMBH | Austria | Wien | Emil-fucik-gasse 1 | Wien | 1100 | europten.***** | 2006 | $188,155,670 | 326 | N/A | N/A | FN276198z |
| 34 | Mce GMBH | Austria | Linz | Franzosenhausweg 25 | Oberösterreich | 4030 | mce-hg.***** | 2003 | $185,203,401 | 500 | N/A | N/A | FN244000z |
| 35 | Lieb Bau Weiz GMBH & CO KG | Austria | Weiz | Birkfelder Straße 40 | Steiermark | 8160 | lieb.***** | 1931 | $180,044,284 | 567 | N/A | N/A | FN14655b |
| 36 | Vamed Engineering GMBH | Austria | Wien | Sterngasse 5 | Wien | 1230 | vamed.***** | 1997 | $178,756,546 | 408 | N/A | N/A | FN162841y |
| 37 | Wimberger Holding GMBH | Austria | Lasberg | Wimbergerhof 1 | Oberösterreich | 4291 | wimbergerhaus.***** | 1990 | $172,919,977 | 238 | N/A | N/A | FN87746p |
| 38 | Elk GMBH | Austria | Schrems | Industriestraße 1 | Niederösterreich | 3943 | elk.***** | 1979 | $169,797,307 | 860 | N/A | N/A | FN36889z |
| 39 | Ortner Ges.m.b.h. | Austria | Innsbruck | Dr.-stumpf-straße 2 | Tirol | 6020 | ortner-anlagen.***** | 1902 | $169,164,614 | 504 | N/A | N/A | FN137983t |
| 40 | Holzhaider Verwaltungs-Gmbh | Austria | Sankt Oswald Bei Freistadt | Wartberg 1 | Oberösterreich | 4271 | holzhaider.***** | 1980 | $168,028,446 | 660 | N/A | N/A | FN83162y |
| 41 | Unger Stahlbau Ges.m.b.h. | Austria | Oberwart | Steinamangererstraße 163 | Burgenland | 7400 | ungersteel.***** | 1960 | $167,003,275 | 371 | N/A | N/A | FN583273f |
| 42 | Kohlbacher GMBH | Austria | Langenwang | Schwöbing 81-83 | Steiermark | 8665 | kohlbacher.***** | 1994 | $165,400,554 | 473 | N/A | N/A | FN127045g |
| 43 | Böhm Bib GMBH | Austria | Wien | Donau City Straße 1 | Wien | 1220 | boehmgmbh.***** | 1977 | $164,366,241 | 513 | N/A | N/A | FN105942y |
| 44 | Htb Baugesellschaft M.B.H. | Austria | Arzl Im Pitztal | Gewerbepark 16 | Tirol | 6471 | swietelsky.***** | 1975 | $162,744,005 | 731 | N/A | N/A | FN42441p |
| 45 | Ht Generalunternehmer & Industriebau GMBH | Austria | Kalsdorf Bei Graz | Eduard-ast-straße 8 | Steiermark | 8401 | ht-gubau.***** | 2017 | $161,102,007 | 155 | N/A | N/A | FN479390k |
| 46 | Kostmann Gesmbh | Austria | Sankt Andrä | Burgstall 44 | Kärnten | 9433 | kostmann.***** | 2000 | $154,857,362 | 551 | N/A | N/A | FN195813k |
| 47 | Felbermayr Bau GMBH & CO KG | Austria | Wels | Voralpenstraße 4 | Oberösterreich | 4600 | felbermayr.***** | 1943 | $153,819,113 | 597 | N/A | N/A | FN227276f |
| 48 | Bemo Tunnelling GMBH | Austria | Innsbruck | Bernhard-höfel-straße 11 | Tirol | 6020 | bemo.***** | 1964 | $150,967,694 | 681 | N/A | N/A | FN46175f |
| 49 | Phb GMBH | Austria | Leoben | Josef-heißl-straße 13 | Steiermark | 8700 | hitthaller.***** | 1907 | $148,920,861 | 522 | N/A | N/A | FN57943k |
| 50 | Wolf Systembau Gesellschaft M.B.H. | Austria | Scharnstein | Fischerbuhel 1 | Oberösterreich | 4644 | wolfsystem.***** | 1965 | $147,498,637 | 640 | N/A | N/A | FN294579f |
| 51 | Klenk & Meder Gesellschaft M.B.H. | Austria | Sankt Pölten | Klenkstraße 1 | Niederösterreich | 3100 | klenk.***** | 1975 | $145,278,910 | 765 | N/A | N/A | FN82965h |
| 52 | Markus Stolz, Gesellschaft M.B.H. & CO. KG., Installationen | Austria | Bludenz | Zurcherstraße 44 | Vorarlberg | 6700 | stolz.***** | 1972 | $142,273,357 | 604 | N/A | N/A | FN14104t |
| 53 | Anton Traunfellner Gesellschaft M.B.H. | Austria | Scheibbs | Erlaufpromenade 32-34 | Niederösterreich | 3270 | antontraunfellner.***** | 1889 | $140,994,402 | 313 | N/A | N/A | FN313095i |
| 54 | Kristl, Seibt & CO. Gesellschaft M.B.H. | Austria | Graz | Baiernstraße 122a | Steiermark | 8052 | ksengineers.***** | 1979 | $139,828,373 | 516 | N/A | N/A | FN55563k |
| 55 | Steiner Bau Gesellschaft M.B.H. | Austria | Sankt Paul Im Lavanttal | Industriestraße 2 | Kärnten | 9470 | steinerbau.***** | 1958 | $136,978,787 | 622 | N/A | N/A | FN120278f |
| 56 | Hilti & Jehle GMBH | Austria | Feldkirch | Hirschgraben 20 | Vorarlberg | 6800 | hilti-jehle.***** | 1876 | $135,638,895 | 681 | N/A | N/A | FN165641s |
| 57 | Gebruder Haider & CO Hoch- U. Tiefbau GMBH | Austria | Kapfenberg | Industriestraße Ost 3 | Steiermark | 8605 | haider-co.***** | 1993 | $135,314,509 | 254 | N/A | N/A | FN39893t |
| 58 | Sefe Securing Energy For Europe GMBH | Austria | Wien | Dresdnerstraße 68/top 3/3 | Wien | 1200 | sefe-group.***** | 1993 | $134,985,494 | 259 | N/A | N/A | FN286294x |
| 59 | Hitthaller + Trixl Baugesellschaft M.B.H. | Austria | Leoben | Josef Heißl-straße 1+3 | Steiermark | 8700 | hitthaller.***** | 2021 | $133,992,389 | 579 | N/A | N/A | FN556188z |
| 60 | Spl Tele GMBH & CO KG | Austria | Wolkersdorf Im Weinviertel | Johann-galler-straße 39 | Niederösterreich | 2120 | spl-tele.***** | 2010 | $129,430,033 | 297 | N/A | N/A | FN399105w |
| 61 | Knapp Systemintegration GMBH | Austria | Leoben | Waltenbachstraße 9 | Steiermark | 8700 | knapp.***** | 1995 | $126,821,990 | 796 | N/A | N/A | FN138870x |
| 62 | Hazet Bauunternehmung GMBH | Austria | Wien | Oberlaaer Straße 276/objekt 5 | Wien | 1230 | hazet.***** | 1997 | $126,611,625 | 223 | N/A | N/A | FN160032t |
| 63 | Eww Anlagentechnik GMBH | Austria | Wels | Knorrstraße 6 | Oberösterreich | 4600 | eww.***** | 1998 | $125,771,522 | 353 | N/A | N/A | FN173488f |
| 64 | Haslinger Stahlbau GMBH | Austria | Feldkirchen in Kärnten | Villacher Straße 20 | Kärnten | 9560 | haslinger.***** | 1974 | $125,755,773 | 445 | N/A | N/A | FN116574h |
| 65 | F & S Beteiligungsgmbh | Austria | Innsbruck | Langer Weg 28 | Tirol | 6020 | fiegl.***** | 2003 | $125,116,880 | 26 | N/A | N/A | FN237497k |
| 66 | Maba Fertigteilindustrie GMBH | Austria | Wöllersdorf | Kirchdorfer Platz 1 | Niederösterreich | 2752 | maba.***** | 1925 | $122,964,549 | 453 | N/A | N/A | FN120417i |
| 67 | Eta Heiztechnik GMBH | Austria | Hofkirchen An der Trattnach | Gewerbepark 1 | Oberösterreich | 4716 | eta.***** | 1998 | $122,275,391 | 376 | N/A | N/A | FN178711k |
| 68 | Equans Gebäudetechnik GMBH | Austria | Wien | Leberstraße 120 | Wien | 1110 | equans.***** | 1959 | $114,999,812 | 500 | N/A | N/A | FN100305h |
| 69 | G. Klampfer Elektroanlagen GMBH | Austria | Leonding | Paschingerstraße 104 | Oberösterreich | 4060 | klampfer.***** | 1985 | $112,234,659 | 275 | N/A | N/A | FN268170v |
| 70 | Meridionale Impianti S.P.A | Austria | Finkenstein am Faaker See | Kärntner Straße 50b | Kärnten | 9586 | N/A | 1981 | $112,027,239 | 69 | N/A | N/A | FN562393z |
| 71 | Wiener Betriebs- Und Baugesellschaft M.B.H. | Austria | Wien | Absberggasse 47 | Wien | 1100 | wibeba.***** | 2006 | $110,172,103 | 403 | N/A | N/A | FN283220a |
| 72 | Gebruder Haider, Bauunternehmung Gesellschaft M.B.H. | Austria | Großraming | Großraming 40 | Oberösterreich | 4463 | gebr-haider.***** | 1975 | $109,341,574 | 490 | N/A | N/A | FN118160s |
| 73 | Pongratz Bau Gesellschaft M.B.H. | Austria | Graz | Zoisweg 6 | Steiermark | 8041 | pongratz.***** | 1980 | $109,130,827 | 191 | N/A | N/A | FN51999w |
| 74 | Vamed Standortentwicklung Und Engineering GMBH | Austria | Wien | Sterngasse 5 | Wien | 1230 | vamed.***** | 1999 | $108,271,908 | 300 | N/A | N/A | FN186417v |
| 75 | Kieninger Gesellschaft M.B.H. | Austria | Bad Goisern am Hallstättersee | Stambach 77 | Oberösterreich | 4822 | kieninger.***** | 1969 | $108,142,075 | 389 | N/A | N/A | FN103816x |
| 76 | Dreihans GMBH | Austria | Ulrichsberg | Steinmuhle 3 | Oberösterreich | 4161 | resch-bau.***** | 2023 | $105,947,710 | 500 | N/A | N/A | FN607174d |
| 77 | Ebg GMBH | Austria | Linz | Emil-rathenau-straße 4 | Oberösterreich | 4030 | ebg-anlagen.***** | 1977 | $104,938,025 | 459 | N/A | N/A | FN224214b |
| 78 | Keller Grundbau Gesellschaft M.B.H. | Austria | Wien | Guglgasse 15/bt4a, 3.og | Wien | 1110 | kellergrundbau.***** | 1968 | $102,939,530 | 272 | N/A | N/A | FN88174v |
| 79 | Dipl.ing. Wilhelm Sedlak Gesellschaft M.B.H. | Austria | Wien | Quellenstraße 163 | Wien | 1100 | sedlak.***** | 1946 | $102,570,316 | 262 | N/A | N/A | FN117401z |
| 80 | J. Christof Gesellschaft M.B.H. | Austria | Graz | Glacisstraße 37 | Steiermark | 8010 | jchristof.***** | 1989 | $99,755,826 | 401 | N/A | N/A | FN47620f |
| 81 | Licht Loidl Gesellschaft M.B.H. | Austria | Lafnitz | Lafnitz 186 | Steiermark | 8233 | licht-loidl.***** | 1966 | $98,908,685 | 547 | N/A | N/A | FN65195a |
| 82 | Molin-Industrie-Inbetriebnahme-Montage-Gesellschaft M.B.H. & CO. KG. | Austria | Wels | Lerschstraße 11 | Oberösterreich | 4600 | molin.***** | 1983 | $97,179,267 | 147 | N/A | N/A | FN27453y |
| 83 | D P B GMBH | Austria | Frauental An der Laßnitz | Gamserstraße 23 | Steiermark | 8523 | dpb.***** | 2001 | $95,478,233 | 193 | N/A | N/A | FN213266b |
| 84 | Iat GMBH | Austria | Wien | 7. Haidequerstraße 5b | Wien | 1110 | i-a-t.***** | 1988 | $94,254,037 | 534 | N/A | N/A | FN122679k |
| 85 | Strobl Bau - Holzbau GMBH | Austria | Weiz | Bundesstraße 85 | Steiermark | 8160 | strobl.***** | 1964 | $93,102,943 | 317 | N/A | N/A | FN65850p |
| 86 | Klöcher Baugesellschaft M.B.H. | Austria | Klöch | Klöchberg 177 | Steiermark | 8493 | kloecher-bau.***** | 1995 | $92,165,846 | 328 | N/A | N/A | FN199266p |
| 87 | Belfor Austria GMBH | Austria | Wien | Großmarktstraße 8 | Wien | 1232 | belfor.***** | 1985 | $91,733,029 | 629 | N/A | N/A | FN72231y |
| 88 | List General Contractor GMBH | Austria | Bad Erlach | List-straße 1 | Niederösterreich | 2822 | listgc.***** | 2000 | $90,841,749 | 274 | N/A | N/A | FN202700p |
| 89 | Lederer-Grabner Immobilien Und Beteiligungen GMBH | Austria | Graz | Brockmanngasse 18/11 | Steiermark | 8010 | ledererbau.***** | 1996 | $90,731,160 | 269 | N/A | N/A | FN152096x |
| 90 | Eqos Energie Osterreich GMBH | Austria | Wien | Oberlaaerstraße 276 | Wien | 1230 | eqos-energie.***** | 2001 | $87,801,798 | 681 | N/A | N/A | FN211083t |
| 91 | Peneder Bau-Elemente GMBH | Austria | Atzbach | Ritzling 9 | Oberösterreich | 4904 | peneder.***** | 1978 | $87,706,215 | 279 | N/A | N/A | FN103392y |
| 92 | Lang Bau GMBH | Austria | Sankt Martin Im Mühlkreis | Langgasse 5 | Oberösterreich | 4113 | lang-bau.***** | 1976 | $87,554,773 | 4 | N/A | N/A | FN80293d |
| 93 | Waagner-Biro Austria Stage Systems GMBH | Austria | Wien | Leonard-bernstein-straße 10 | Wien | 1220 | waagner-biro-stage.***** | 1999 | $85,639,113 | 173 | N/A | N/A | FN187495d |
| 94 | Lederer-Grabner Baugesellschaft Mbh | Austria | Graz | Puchstraße 162 | Steiermark | 8055 | ledererbau.***** | 2022 | $85,224,870 | 4 | N/A | N/A | FN582285b |
| 95 | Asfinag Bau Management GMBH | Austria | Wien | Schnirchgasse 17 | Wien | 1030 | asfinag.***** | 2004 | $85,190,153 | 453 | N/A | N/A | FN255631d |
| 96 | Wimberger Bau GMBH | Austria | Lasberg | Wimbergerhof 1 | Oberösterreich | 4291 | wimbergerhaus.***** | 1990 | $84,151,016 | 358 | N/A | N/A | FN438175a |
| 97 | Mayr-Bau Gesellschaft M.B.H. | Austria | Steyr | Seitenstettnerstraße 28 | Oberösterreich | 4400 | mayr-bau.***** | 1985 | $82,974,498 | 120 | N/A | N/A | FN370678s |
| 98 | Bauschutz GMBH & CO. KG | Austria | Wels | Dieselstraße 9 | Oberösterreich | 4600 | bauschutz.***** | 1958 | $82,734,544 | 391 | N/A | N/A | FN27200a |
| 99 | Asfinag Alpenstraßen GMBH | Austria | Innsbruck | Rennweg 10a | Tirol | 6020 | asfinag.***** | 2004 | $82,712,051 | 278 | N/A | N/A | FN255701g |
| 100 | Ksw Elektro- Und Industrieanlagenbau Gesellschaft M.B.H. | Austria | Feldkirch | Studa 3a | Vorarlberg | 6800 | kswtech.***** | 1993 | $82,560,581 | 414 | N/A | N/A | FN41484g |