| 1 | Ascalon Consulting GMBH | Austria | Wien | Döblergasse 1-3/3/30 | Wien | 1070 | ascalon.***** | 2008 | $679,281,874 | 1,921 | N/A | N/A | FN321293s |
| 2 | Tgw Immobilien Wels GMBH | Austria | Wels | Collmannstraße 2 | Oberösterreich | 4600 | tgw-group.***** | 1962 | $505,309,979 | 1,450 | N/A | N/A | FN195913h |
| 3 | Accenture GMBH | Austria | Wien | Schottenring 16 | Wien | 1010 | accenture.***** | 1988 | $498,191,747 | 1,017 | N/A | N/A | FN100017i |
| 4 | Klg GMBH | Austria | Sankt Florian | Tti-platz 1 | Oberösterreich | 4490 | N/A | 2018 | $274,004,002 | 10 | N/A | N/A | FN487699f |
| 5 | Martens Management GMBH | Austria | Wien | Alserbachstraße 14-16 | Wien | 1090 | N/A | 2008 | $264,976,731 | 3 | N/A | N/A | FN317834d |
| 6 | Ccb Management Services GMBH | Austria | Wien | Clemens-holzmeister-straße 6/6.og | Wien | 1100 | coke.***** | 1996 | $256,509,892 | 34 | N/A | N/A | FN152696d |
| 7 | Tuv Austria GMBH | Austria | Wien | Deutschstraße 10 | Wien | 1230 | tuv.***** | 1948 | $163,317,943 | 789 | N/A | N/A | FN288476f |
| 8 | Innofreight Consulting & Logistics GMBH | Austria | Bruck An der Mur | Grazer Straße 11 | Steiermark | 8600 | innofreight.***** | 2002 | $151,172,033 | 4 | N/A | N/A | FN237248w |
| 9 | Ventocom GMBH | Austria | Wien | Baumgasse 60b | Wien | 1030 | ventocom.***** | 2013 | $143,553,176 | 20 | N/A | N/A | FN403085y |
| 10 | Cnt Management Consulting AG | Austria | Wien | Leonard-bernstein-straße 10 | Wien | 1220 | cnt-online.***** | 1999 | $142,867,536 | 140 | N/A | N/A | FN181223f |
| 11 | F-Energies GMBH | Austria | Wildon | Franz-heresch-straße 1 | Steiermark | 8410 | f-energies.***** | 2002 | $140,470,199 | 348 | N/A | N/A | FN337714p |
| 12 | Wiener Kommunal-Umweltschutzprojektgesellschaft Mbh | Austria | Wien | Johann-petrak-gasse 7 | Wien | 1110 | wku.***** | 2002 | $139,640,175 | 34 | N/A | N/A | FN223982k |
| 13 | The Boston Consulting Group (austria) GMBH | Austria | Wien | Postgasse 10 | Wien | 1010 | bcg.***** | 1997 | $129,683,189 | 135 | N/A | N/A | FN160006d |
| 14 | Kpmg Advisory GMBH | Austria | Linz | Kudlichstraße 41 | Oberösterreich | 4020 | kpmg.***** | 1995 | $97,406,267 | 119 | N/A | N/A | FN141176m |
| 15 | Porsche Sales & Marketplace GMBH | Austria | Salzburg | Louise-piëch-straße 2 | Salzburg | 5020 | N/A | 2009 | $92,063,921 | 10 | N/A | N/A | FN562241a |
| 16 | Biolitec Holding GMBH & CO KG | Austria | Wien | Untere Viaduktgasse 6/top 9 | Wien | 1030 | biolitec.***** | 2012 | $86,763,966 | 10 | N/A | N/A | FN617729a |
| 17 | Pwc Advisory Services GMBH | Austria | Wien | Donau-city-straße 7 | Wien | 1220 | pwc.***** | 1975 | $78,695,535 | 27 | N/A | N/A | FN88905v |
| 18 | Crrc Zelc Verkehrstechnik GMBH | Austria | Wien | Donau-city-straße 7/35. Obergeschoß . | Wien | 1220 | crrczelc-europe.***** | 2015 | $74,998,937 | 61 | N/A | N/A | FN445425m |
| 19 | Arsenalia GMBH | Austria | Wien | Am Belvedere 4 | Wien | 1100 | arsenalia.***** | 2010 | $73,915,894 | 3 | N/A | N/A | FN346590t |
| 20 | Lincoln International GMBH | Austria | Wien | Renngasse 4 | Wien | 1010 | lincolninternational.***** | 2006 | $62,888,555 | 105 | N/A | N/A | FN294282v |
| 21 | Be Solution GMBH | Austria | Eisenstadt | Kasernenstraße 9 | Burgenland | 7000 | N/A | 2022 | $60,400,727 | 170 | N/A | N/A | FN577738s |
| 22 | Deloitte Consulting GMBH | Austria | Wien | Renngasse 1/freyung | Wien | 1010 | deloitte.***** | 2001 | $60,042,752 | 15 | N/A | N/A | FN212552b |
| 23 | Smartstream.tv GMBH | Austria | Wien | Dc Tower, 30./stock Donau-city-straße 7 | Wien | 1220 | N/A | 2012 | $58,214,494 | 39 | N/A | N/A | FN513059z |
| 24 | Dai Global Austria GMBH & CO KG | Austria | Wien | Lothringer Straße 16/5 | Wien | 1030 | dai.***** | 1993 | $52,811,597 | 115 | N/A | N/A | FN30633z |
| 25 | Efs Unternehmensberatung Gesellschaft M.B.H. | Austria | Wien | Ungargasse 59-61 | Wien | 1030 | efs.***** | 1988 | $52,488,293 | 299 | N/A | N/A | FN56545f |
| 26 | Rms Radio Marketing Service GMBH | Austria | Wien | Strobachgasse 4/17 | Wien | 1050 | rms-austria.***** | 1998 | $52,001,047 | 19 | N/A | N/A | FN170502p |
| 27 | Ame International GMBH | Austria | Wien | Hietzinger Hauptstraße 46 | Wien | 1130 | ame-international.***** | 1995 | $49,842,628 | 16 | N/A | N/A | FN132324w |
| 28 | Woo Beteiligungs GMBH | Austria | Wien | Modecenterstrasse 17unit/4/7 | Wien | 1110 | msg-plaut.***** | 1997 | $48,851,632 | 170 | N/A | N/A | FN246322p |
| 29 | Vamed Management Und Service GMBH | Austria | Wien | Sterngasse 5 | Wien | 1230 | vamed.***** | 1985 | $47,479,646 | 235 | N/A | N/A | FN80736f |
| 30 | Bearingpoint GMBH | Austria | Wien | Wiedner Gurtel 13/turm 24 | Wien | 1100 | bearingpoint.***** | 1998 | $44,171,572 | 334 | N/A | N/A | FN175524z |
| 31 | Veolia Industries Austria GMBH | Austria | Kundl | Austraße 11 | Tirol | 6250 | industries.***** | 2016 | $40,737,361 | 181 | N/A | N/A | FN456982h |
| 32 | Jti Austria GMBH | Austria | Wien | Erdberger Lände 26a/71 | Wien | 1030 | jti.***** | 2008 | $40,602,892 | 72 | N/A | N/A | FN309726f |
| 33 | Tuv Sud Landesgesellschaft Osterreich GMBH | Austria | Wiesing | Dorf 104 | Tirol | 6210 | tuvsud.***** | 1988 | $40,350,673 | 217 | N/A | N/A | FN37799m |
| 34 | Capgemini Consulting Osterreich AG | Austria | Wien | Handelskai 94-96/22. Stock | Wien | 1200 | capgemini.***** | 2000 | $39,243,894 | 195 | N/A | N/A | FN194903y |
| 35 | Die Berater Unternehmensberatungsgesellschaft M.B.H. | Austria | Wien | Wipplingerstraße 32/23-26 | Wien | 1010 | dieberater.***** | 1998 | $38,794,068 | 287 | N/A | N/A | FN172936v |
| 36 | Zib Training GMBH | Austria | Sankt Pölten | Bräuhausgasse 3/3/1 | Niederösterreich | 3100 | zib-training.***** | 2004 | $36,644,760 | 295 | N/A | N/A | FN250280i |
| 37 | Mckinsey & Company, INC. Austria | Austria | Wien | Schottenring 19 | Wien | 1010 | mckinsey.***** | 1989 | $36,644,760 | 118 | N/A | N/A | FN65247b |
| 38 | Ri-Solution Data GMBH | Austria | Korneuburg | Raiffeisenstraße 1 | Niederösterreich | 2100 | ri-solution.***** | 2001 | $32,479,388 | 92 | N/A | N/A | FN217678s |
| 39 | Apple Gesellschaft M.B.H. | Austria | Wien | Weihburggasse 2/3. Stock | Wien | 1010 | apple.***** | 1983 | $31,439,221 | 36 | N/A | N/A | FN81228d |
| 40 | Kommunalkredit Public Consulting GMBH | Austria | Wien | Turkenstraße 9 | Wien | 1090 | kommunalkredit.***** | 2003 | $30,710,697 | 158 | N/A | N/A | FN236804t |
| 41 | Logistic Networking & Consulting GMBH | Austria | Fernitz | Kalsdorfer Straße 12 | Steiermark | 8072 | ses-imagotag.***** | 2003 | $29,887,489 | 34 | N/A | N/A | FN234212f |
| 42 | Rsrs GMBH Railway Infrastructure Projects | Austria | Schwaz | Munchnerstraße 15 | Tirol | 6130 | molinari-rail.***** | 2009 | $29,873,998 | 38 | N/A | N/A | FN341220w |
| 43 | Osb Consulting GMBH | Austria | Wien | Obere Donaustraße 33 | Wien | 1020 | oesb.***** | 1991 | $29,763,187 | 217 | N/A | N/A | FN100755w |
| 44 | EHF Marketing GMBH | Austria | Wien | Baumgasse 60a | Wien | 1030 | ehfmarketing.***** | 2005 | $28,905,784 | 21 | N/A | N/A | FN264635w |
| 45 | Recycleme GMBH | Austria | Wien | Am Tabor 44/top 3.03.c | Wien | 1020 | reclay-group.***** | 2009 | $28,780,140 | 21 | N/A | N/A | FN339682h |
| 46 | Deloitte Financial Advisory GMBH | Austria | Wien | Renngasse 1/freyung | Wien | 1010 | deloitte.***** | 2000 | $26,365,442 | 6 | N/A | N/A | FN199744t |
| 47 | 4activesystems GMBH | Austria | Traboch | Industriepark 1 | Steiermark | 8772 | 4a.***** | 2015 | $25,702,450 | 56 | N/A | N/A | FN432300k |
| 48 | Ofb Wirtschaftsbetriebe GMBH | Austria | Wien | Meiereistraße 7/sektor A/f | Wien | 1020 | oefb.***** | 1997 | $24,656,207 | 26 | N/A | N/A | FN163786m |
| 49 | Payback Austria GMBH | Austria | Wien | Rathausstraße 1 | Wien | 1010 | N/A | 1999 | $24,206,441 | 15 | N/A | N/A | FN179444p |
| 50 | Oamtc Fahrtechnik GMBH | Austria | Wien | Baumgasse 129 | Wien | 1030 | oeamtc.***** | 2001 | $23,840,350 | 102 | N/A | N/A | FN215447i |
| 51 | Health4you GMBH | Austria | Wien | Bergengasse 6/6/4 | Wien | 1220 | N/A | 2015 | $23,460,019 | 2 | N/A | N/A | FN439778h |
| 52 | Afb Allgemeine Finanzierungsberatungs-Aktiengesellschaft. | Austria | Graz | Brauquartier 11/1.og/top 8 | Steiermark | 8055 | afb-ag.***** | 1992 | $22,181,930 | 2 | N/A | N/A | FN39201z |
| 53 | Stiwa Ams GMBH | Austria | Attnang | Salzburger Straße 52 | Oberösterreich | 4800 | stiwa.***** | 1975 | $21,528,999 | 38 | N/A | N/A | FN103503k |
| 54 | Zeb.rolfes.schierenbeck.associates GMBH | Austria | Wien | Praterstraße 31 | Wien | 1020 | zeb-consulting.***** | 1998 | $20,390,166 | 55 | N/A | N/A | FN168726b |
| 55 | Wifi Kärnten GMBH | Austria | Klagenfurt am Wörthersee | Europaplatz 1 | Kärnten | 9020 | wifikaernten.***** | 1945 | $20,370,948 | 66 | N/A | N/A | FN230489f |
| 56 | Today Experts GMBH | Austria | Wien | Favoritenstraße 34/11 | Wien | 1040 | today-experts.***** | 2010 | $19,337,481 | 129 | N/A | N/A | FN341157b |
| 57 | Swiss Life Select Osterreich GMBH | Austria | Wien | Wiedner Hauptstraße 120-124 | Wien | 1050 | swisslife-select.***** | 1991 | $18,703,720 | 116 | N/A | N/A | FN35682z |
| 58 | Tecton Consult Baumanagement GMBH Interdisziplinäre Gesellschaft Mit Ziviltechnikern (inge | Austria | Wien | Wallgasse 19/dg 26 | Wien | 1060 | tecton-consult.***** | 2008 | $18,435,217 | 89 | N/A | N/A | FN311524z |
| 59 | Gbg Service GMBH | Austria | Eisenstadt | Neusiedler Straße 33 | Burgenland | 7000 | bbleasing.***** | 2012 | $17,959,991 | 162 | N/A | N/A | FN389149d |
| 60 | Credo Immobilien Development GMBH | Austria | Wien | Wienerbergstraße 9 | Wien | 1100 | immofinanz.***** | 1990 | $17,931,503 | 9 | N/A | N/A | FN82268h |
| 61 | Eli Lilly Regional Operations Gesellschaft Mit Beschränkter Haftung | Austria | Wien | Erdberger Lände 26a | Wien | 1030 | lilly.***** | 1998 | $17,881,893 | 30 | N/A | N/A | FN177968v |
| 62 | Communardo GMBH | Austria | Dornbirn | Hintere Achmuhlerstraß 1a | Vorarlberg | 6850 | N/A | 2000 | $17,692,245 | 172 | N/A | N/A | FN462279y |
| 63 | Bdo Consulting GMBH | Austria | Wien | Am Belvedere 4 | Wien | 1100 | bdo.***** | 2001 | $17,253,383 | 116 | N/A | N/A | FN217731v |
| 64 | Software GMBH Osterreich | Austria | Wien | Donau-city-straße 1 | Wien | 1220 | softwareag.***** | 1992 | $16,991,872 | 32 | N/A | N/A | FN51421w |
| 65 | Ebcont Proconsult GMBH | Austria | Neulengbach | Bergmanngasse 7 | Niederösterreich | 3040 | N/A | 2013 | $16,569,932 | 93 | N/A | N/A | FN399976a |
| 66 | A.T. Kearney Ges.m.b.h. | Austria | Wien | Tuchlauben 7/5. Stock/top 8 | Wien | 1010 | atkearney.***** | 1997 | $16,052,126 | 47 | N/A | N/A | FN165802b |
| 67 | Wanek Marketing - Service GMBH | Austria | Ardagger Markt | Holzhausen 38 | Niederösterreich | 3321 | wanek.***** | 1995 | $15,859,018 | 5 | N/A | N/A | FN192618m |
| 68 | Softengine Support Und Softwareservice GMBH | Austria | Wien | Schererstraße 16/1.og/2 | Wien | 1210 | softengine.***** | 2001 | $14,776,177 | 12 | N/A | N/A | FN216569i |
| 69 | Phoron Consulting GMBH | Austria | Wien | Guglgasse 15/3b | Wien | 1110 | phoron.***** | 2004 | $14,726,231 | 84 | N/A | N/A | FN248126t |
| 70 | Sec Consult Unternehmensberatung GMBH | Austria | Wien | Wagramer Straße 19/stock 16 | Wien | 1220 | sec-consult.***** | 2002 | $13,310,247 | 80 | N/A | N/A | FN227896t |
| 71 | Fortna Germany GMBH | Austria | Graz | Liebenauer Hauptstraße 2-6 | Steiermark | 8041 | N/A | 1989 | $12,427,450 | 22 | N/A | N/A | FN575257t |
| 72 | Dryfix GMBH | Austria | Wien | Wienerbergerplatz 1 | Wien | 1100 | wienerberger.***** | 2007 | $12,250,931 | 3 | N/A | N/A | FN297891a |
| 73 | Pwc STRATEGY& (austria) GMBH | Austria | Wien | Donau-city-straße 7 | Wien | 1220 | strategyand.***** | 1996 | $12,214,470 | 55 | N/A | N/A | FN146053i |
| 74 | One2zero GMBH | Austria | Salzburg | Strubergasse 26 | Salzburg | 5020 | one2zero.***** | 2021 | $11,681,912 | 20 | N/A | N/A | FN567399k |
| 75 | Roland Berger GMBH | Austria | Wien | Wipplingerstraße 35/11 | Wien | 1010 | rolandberger.***** | 1989 | $10,874,755 | 40 | N/A | N/A | FN108080t |
| 76 | Igt Geotechnik Und Tunnelbau Ziviltechniker Gesellschaft M.B.H. | Austria | Salzburg | Mauracherstraße 9 | Salzburg | 5020 | igt-engineering.***** | 1983 | $10,869,091 | 130 | N/A | N/A | FN53883s |
| 77 | Kötz GMBH | Austria | Hengsberg | Matzelsdorf 70 | Steiermark | 8411 | koetz-haus.***** | 1999 | $10,855,670 | 20 | N/A | N/A | FN183948m |
| 78 | Caleo Consulting GMBH | Austria | Wien | Schleifmuhlgasse 11/20 | Wien | 1040 | caleo.***** | 2002 | $10,326,668 | 55 | N/A | N/A | FN250729w |
| 79 | Horvath & Partner Management Consulting GMBH | Austria | Wien | Canettistraße 5 | Wien | 1100 | horvath-partners.***** | 1994 | $10,098,074 | 33 | N/A | N/A | FN110814m |
| 80 | Deutsche Vermögensberatung Bank Aktiengesellschaft | Austria | Wien | Rotenturmstraße 16-18 | Wien | 1010 | dvag.***** | 1993 | $10,029,609 | 27 | N/A | N/A | FN36807d |
| 81 | Concentrix Austria GMBH | Austria | Wien | Floridsdorfer Hauptstraße 1 | Wien | 1210 | webhelp.***** | 1999 | $9,658,167 | 211 | N/A | N/A | FN185867i |
| 82 | Tci Consult GMBH | Austria | Wien | Eschenbachgasse 11/dachgeschoss | Wien | 1010 | tciconsult.***** | 2006 | $8,976,839 | 28 | N/A | N/A | FN282159s |
| 83 | Wavestone Austria GMBH | Austria | Wien | Josefstädter Straße 43-45/1/2 | Wien | 1080 | q-perior.***** | 2009 | $8,888,481 | 16 | N/A | N/A | FN325336k |
| 84 | Osterreichisches Okologie-Institut Landespol.dion Wien, Referat Vereins-, Versammlungs- UN | Austria | Wien | Seidengasse 13-3 | Wien | 1070 | ecology.***** | 1985 | $8,625,446 | 134 | N/A | N/A | ZVR 711512088 |
| 85 | Zh-Technologies Regelungs- Und Automatisierungstechnik GMBH | Austria | Griffen | Handelsstraße 7 | Kärnten | 9112 | zh-tech.***** | 1998 | $8,603,977 | 61 | N/A | N/A | FN174286d |
| 86 | Vienna Marketing- & Energycontracting GMBH | Austria | Wien | Elsa-bienenfeld-weg 19/2a | Wien | 1020 | viennacontracting.***** | 1984 | $8,513,870 | 23 | N/A | N/A | FN86982s |
| 87 | Afry Management Consulting Austria GMBH | Austria | Wien | Kranichberggasse 2/building J | Wien | 1120 | poyry.***** | 2011 | $8,495,936 | 24 | N/A | N/A | FN368887g |
| 88 | Orf Landesstudio Marketing GMBH & CO KG | Austria | Innsbruck | Rennweg 14 | Tirol | 6020 | tirol.***** | 2014 | $8,394,545 | 24 | N/A | N/A | FN420197m |
| 89 | Kmu Akademie & Management AG | Austria | Linz | Hauptstraße 54 | Oberösterreich | 4040 | kmuakademie.***** | 2006 | $8,166,367 | 20 | N/A | N/A | FN273129k |
| 90 | Tsetinis-Efeso Management Consulting At GMBH | Austria | Puch Bei Hallein | Urstein Sud 9/top/301 | Salzburg | 5412 | N/A | 2010 | $8,079,364 | 89 | N/A | N/A | FN347969w |
| 91 | Bartenbach GMBH | Austria | Wattens | Quartier am Brandgut, Lindenstraße 1 | Tirol | 6112 | bartenbach.***** | 1956 | $7,929,509 | 96 | N/A | N/A | FN115673h |
| 92 | Pro Projekt Baumanagement & Planungs GMBH | Austria | Wien | Ghegastraße 3/6.og | Wien | 1030 | proprojekt.***** | 2005 | $7,929,509 | 9 | N/A | N/A | FN261050y |
| 93 | Bfi Wien Ausbildung GMBH | Austria | Wien | Johann Hoffmann Platz 9 | Wien | 1120 | kapschpartnersolutions.***** | 2000 | $7,357,966 | 50 | N/A | N/A | FN194612w |
| 94 | Rochus Assets GMBH | Austria | Klagenfurt am Wörthersee | Hans-sachs-straße 13 | Kärnten | 9020 | sapp.***** | 2004 | $6,922,597 | 21 | N/A | N/A | FN250998s |
| 95 | Miim Management GMBH | Austria | Wien | Sommerhaidenweg 39 | Wien | 1180 | meritgroup.***** | 1995 | $6,875,905 | 2 | N/A | N/A | FN132084t |
| 96 | Allplan Gesellschaft M.B.H. | Austria | Wien | Schwindgasse 10 | Wien | 1040 | allplan.***** | 1981 | $6,864,689 | 64 | N/A | N/A | FN94000k |
| 97 | Intact GMBH | Austria | Lebring | Parkring 6 | Steiermark | 8403 | intact-systems.***** | 2001 | $6,796,722 | 103 | N/A | N/A | FN218078d |
| 98 | Blackwood GMBH | Austria | Wien | Muthgasse 36/1.og | Wien | 1190 | oscarkarem.***** | 2019 | $6,796,722 | 3 | N/A | N/A | FN520369z |
| 99 | Projektbau Planung Projektmanagement Bauleitung Gesmbh | Austria | Wien | Lindengasse 55 | Wien | 1070 | projektbau.***** | 1953 | $6,785,388 | 32 | N/A | N/A | FN83767m |
| 100 | Z-E-V Nah & Frisch Marketingservice Gesellschaft M.B.H. | Austria | Wien | Radingerstraße 2a | Wien | 1020 | nahundfrisch.***** | 1959 | $6,785,388 | 5 | N/A | N/A | FN71158w |