| 1 | Heinrich Krumme Gesellschaft Fur Heizungs- Und Sanitärtechnik Mbh | Germany | Büdelsdorf | Fehmarnstr. 4 | Rendsburg-eckernförde | 24782 | krumme-buedelsdorf.***** | 2014 | $18,606,026,813 | 45 | N/A | N/A | 24114B402RD |
| 2 | Westnetz GMBH | Germany | Dortmund | Florianstr. 15-21 | Dortmund, Stadt | 44139 | iam.***** | 2019 | $9,112,546,436 | 6,140 | N/A | N/A | 44135B30872 |
| 3 | Avacon Netz GMBH | Germany | Helmstedt | Schillerstr. 3 | Helmstedt | 38350 | avacon.***** | 2017 | $2,980,899,488 | 2,134 | N/A | N/A | 38100B203312 |
| 4 | Engie Deutschland GMBH | Germany | Köln | Aachener Str. 1044 | Köln, Stadt | 50858 | engie-deutschland.***** | 2018 | $2,152,524,905 | 4,639 | N/A | N/A | 50670B57515 |
| 5 | Securiton AG | Switzerland | Zollikofen | Alpenstrasse 20 | Bern | 3052 | securiton.***** | 1948 | $1,313,512,901 | 11,327 | N/A | N/A | CHE-105.949.308 |
| 6 | Imtech Deutschland GMBH & CO. KG | Germany | Hamburg | Uberseering 35 | Hamburg, Freie Und Hansestadt | 22297 | imtech.***** | 1858 | $1,125,681,641 | 3,818 | N/A | N/A | 20355A43816 |
| 7 | Enpal B.V., Zweigniederlassung Berlin | Germany | Berlin | Bödikerstr. 25 | Berlin, Stadt | 10245 | enpal.***** | 2017 | $961,102,760 | 2,400 | N/A | N/A | 10623B253384B |
| 8 | Tokyo Electron Europe LIMITED | Austria | Villach | Europastraße 8 | Kärnten | 9500 | N/A | 1994 | $925,424,898 | 30 | N/A | N/A | FN428951k |
| 9 | Siemens Gamesa Renewable Energy Deutschland GMBH | Germany | Hamburg | Beim Strohhause 17-31 | Hamburg, Freie Und Hansestadt | 20097 | areva-wind.***** | 2020 | $838,733,128 | 601 | N/A | N/A | 28195B3715BHV |
| 10 | Etavis AG | Switzerland | Zurich | Pfingstweidstrasse 106 | Zürich | 8005 | etavis.***** | 1969 | $811,037,131 | 509 | N/A | N/A | CHE-105.946.712 |
| 11 | Brackelmann & Wiggerich Elektro- Und Gebäudesystemtechnik GMBH | Germany | Hamm | Alleestr. 56 | Hamm, Stadt | 59065 | brackelmann-wiggerich.***** | 2004 | $508,992,588 | 42 | N/A | N/A | 59065B4421 |
| 12 | RUD. Otto Meyer Technik GMBH & CO. KG | Germany | Bremen | Hansator 20 | Bremen, Stadt | 28217 | rom-technik.***** | 2015 | $499,525,813 | 2,078 | N/A | N/A | 28195A27282HB |
| 13 | Huawei Technologies Duesseldorf GMBH | Germany | Düsseldorf | Hansaallee 205 | Düsseldorf, Stadt | 40549 | huawei.***** | 2018 | $449,256,894 | 1,030 | N/A | N/A | 40227B56063 |
| 14 | Caverion Deutschland GMBH | Germany | München | Riesstr. 8 | München | 80992 | caverion.***** | 2014 | $444,050,774 | 2,176 | N/A | N/A | 80333B189657 |
| 15 | Cteam Consulting & Anlagenbau GMBH | Germany | Ummendorf | Im Stocken 6 | Biberach | 88444 | cteam.***** | 2025 | $404,630,222 | 841 | N/A | N/A | 89073B641741 |
| 16 | Vaillant Deutschland GMBH & CO. KG | Germany | Remscheid | Berghauser Str. 40 | Remscheid, Stadt | 42859 | vaillant.***** | 2003 | $385,503,096 | 1,000 | N/A | N/A | 42103A19318 |
| 17 | Etavis Grossenbacher AG | Switzerland | Saint-gall | Oststrasse 25 | Sankt Gallen | 9000 | etavis.***** | 1967 | $378,155,343 | 3,261 | N/A | N/A | CHE-105.782.936 |
| 18 | Axians Schweiz AG | Switzerland | Ittigen | Pulverstrasse 8 | Bern | 3063 | axians.***** | 1979 | $378,155,343 | 3,261 | N/A | N/A | CHE-105.862.877 |
| 19 | Borkum Riffgrund 2 Offshore Wind Farm GMBH & CO. OHG | Germany | Norden | Am Osthafen 2 | Aurich | 26506 | N/A | 2003 | $327,639,797 | 1 | N/A | N/A | 26603A202470 |
| 20 | Diebold Nixdorf Deutschland GMBH | Germany | Paderborn | Heinz-nixdorf-ring 1 | Paderborn | 33106 | dieboldnixdorf.***** | 2018 | $321,556,469 | 222 | N/A | N/A | 33098B13110 |
| 21 | Stäubli Tec-Systems GMBH | Austria | Asten | Bahnhofstraße 1a | Oberösterreich | 4481 | staubli.***** | 1986 | $301,407,510 | 1,086 | N/A | N/A | FN491361s |
| 22 | Caverion Osterreich GMBH | Austria | Wien | Laxenburger Straße 254 | Wien | 1230 | caverion.***** | 1956 | $294,853,646 | 1,081 | N/A | N/A | FN309157v |
| 23 | Solarworld Industries Thuringen GMBH | Germany | Arnstadt | Robert-bosch-str. 1 | Ilm-kreis | 99310 | solarworld.***** | 2013 | $276,310,023 | 759 | N/A | N/A | 07745B510228 |
| 24 | Enaco Energieanlagen- Und Kommunikationstechnik GMBH | Germany | Maisach | Tulpenstr. 19 | Fürstenfeldbruck | 82216 | enaco.***** | 1964 | $251,054,047 | 826 | N/A | N/A | 80333B6292 |
| 25 | Bachner Elektro GMBH & CO. KG | Austria | Steyr | Bmw-allee 2 | Oberösterreich | 4400 | bachner.***** | 2004 | $229,900,252 | 30 | N/A | N/A | FN242117f |
| 26 | Elin GMBH Zweigniederlassung Stuttgart | Germany | Aalen | Ebnater Hauptstr. 55 | Ostalbkreis | 73432 | elin.***** | 2002 | $209,444,961 | 734 | N/A | N/A | 70190B771090 |
| 27 | Leadec BV & CO. KG | Germany | Garching Bei München | Parkring 33 | München | 85748 | voith.***** | 1995 | $207,653,640 | 1,377 | N/A | N/A | 80333A100755 |
| 28 | Borkum Riffgrund I Offshore Windpark A/S GMBH & CO. OHG | Germany | Norden | Am Osthafen 1 | Aurich | 26506 | N/A | 2012 | $204,245,594 | 1 | N/A | N/A | 26603A201463 |
| 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 | Bachner Elektro GMBH & CO. KG | Germany | Mainburg | Am Hang 2 | Kelheim | 84048 | bachner.***** | 2018 | $175,440,128 | 500 | N/A | N/A | 93049A5768 |
| 31 | 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 |
| 32 | Ltb Leitungsbau GMBH | Germany | Radebeul | Friedrich-list-str. 27 | Meißen | 01445 | ltb-leitungsbau.***** | 2022 | $165,648,278 | 448 | N/A | N/A | 01067B23871 |
| 33 | Spl Powerlines Germany GMBH | Germany | Forchheim | Breitweidig 7 | Forchheim | 91301 | powerlines-group.***** | 2012 | $165,151,740 | 555 | N/A | N/A | 96047B5601 |
| 34 | Dacoso GMBH | Germany | Langen (hessen) | Monzastr. 5 | Offenbach | 63225 | dacoso.***** | 2025 | $163,290,535 | 230 | N/A | N/A | 63065B41050 |
| 35 | Salvia Elektrotechnik GMBH | Germany | München | Landsberger Str. 404 | München | 81241 | salvia-elektro.***** | 2019 | $159,847,567 | 237 | N/A | N/A | 80333B176291 |
| 36 | Elektro Beckhoff GMBH | Germany | Verl | Westweg 6 | Gütersloh | 33415 | elektro-beckhoff.***** | 2013 | $158,933,094 | 921 | N/A | N/A | 33330B7212 |
| 37 | Prinzing Elektrotechnik GMBH | Germany | Eislingen/fils | Am Eichenbach 7 | Göppingen | 73054 | prinzing-elektro.***** | 2022 | $148,678,880 | 234 | N/A | N/A | 89073B533483 |
| 38 | Daume GMBH | Germany | Duderstadt | Brandenburger Str. 1 | Niedersachsen | 37115 | daume-online.***** | 2011 | $147,357,206 | 444 | N/A | N/A | 37073B102099 |
| 39 | Karl Lausser, Heizungsbau- Und Sanitär GMBH | Germany | Rattiszell | Hauptstr. 20 | Straubing-bogen | 94372 | lausser.***** | 2008 | $145,821,142 | 588 | N/A | N/A | 94315B9415 |
| 40 | Klenk & Meder Gesellschaft M.B.H. | Austria | Sankt Pölten | Klenkstraße 1 | Niederösterreich | 3100 | klenk.***** | 1975 | $145,278,910 | 765 | N/A | N/A | FN82965h |
| 41 | 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 |
| 42 | Systeex Brandschutzsysteme GMBH | Germany | Hanau | Kinzigheimer Weg 106 | Main-kinzig-kreis | 63450 | systeex.***** | 2015 | $140,890,335 | 547 | N/A | N/A | 63450B95899 |
| 43 | Kristl, Seibt & CO. Gesellschaft M.B.H. | Austria | Graz | Baiernstraße 122a | Steiermark | 8052 | ksengineers.***** | 1979 | $139,828,373 | 516 | N/A | N/A | FN55563k |
| 44 | Klima AG | Switzerland | Bâle | Hochbergerstrasse 60c | Basel-stadt | 4057 | haelg.***** | 1969 | $139,223,700 | 1,100 | N/A | N/A | CHE-109.401.104 |
| 45 | Steep GMBH | Germany | Bonn | Justus-von-liebig-str. 18 | Bonn, Stadt | 53121 | steep.***** | 2018 | $135,839,618 | 750 | N/A | N/A | 53111B8533 |
| 46 | 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 |
| 47 | Telent GMBH | Germany | Backnang | Gerberstr. 34 | Rems-murr-kreis | 71522 | telent.***** | 2020 | $128,974,234 | 491 | N/A | N/A | 70190B738199 |
| 48 | Rolf Petersen GMBH | Germany | Osterrönfeld | Walter-zeidler-str. 5-7 | Rendsburg-eckernförde | 24783 | rolfpetersen.***** | 1972 | $128,501,032 | 110 | N/A | N/A | 24114B404RD |
| 49 | Omexom Ga Sud GMBH | Germany | Fellbach | Welfenstr. 17 | Rems-murr-kreis | 70736 | omexom.***** | 2015 | $128,187,847 | 705 | N/A | N/A | 70190B263272 |
| 50 | Knapp Systemintegration GMBH | Austria | Leoben | Waltenbachstraße 9 | Steiermark | 8700 | knapp.***** | 1995 | $126,821,990 | 796 | N/A | N/A | FN138870x |
| 51 | Eww Anlagentechnik GMBH | Austria | Wels | Knorrstraße 6 | Oberösterreich | 4600 | eww.***** | 1998 | $125,771,522 | 353 | N/A | N/A | FN173488f |
| 52 | K+b E-Tech GMBH & CO. KG | Germany | Cham | Barbaraweg 2 | Cham | 93413 | k-b.***** | 2005 | $124,230,878 | 667 | N/A | N/A | 93049A7202 |
| 53 | Bss Brandschutz Sichelstiel GMBH | Germany | Nürnberg | Duisburger Str. 52 | Nürnberg | 90451 | bss-sichelstiel.***** | 2020 | $123,044,378 | 407 | N/A | N/A | 90402B22781 |
| 54 | Eta Heiztechnik GMBH | Austria | Hofkirchen An der Trattnach | Gewerbepark 1 | Oberösterreich | 4716 | eta.***** | 1998 | $122,275,391 | 376 | N/A | N/A | FN178711k |
| 55 | B&O Bau Und Gebäudetechnik GMBH & CO. KG | Germany | Berlin | Börnestr. 37-41 | Berlin, Stadt | 13086 | bo-gruppe.***** | 1993 | $121,052,650 | 254 | N/A | N/A | 10623A31759B |
| 56 | Equans Gebäudetechnik GMBH | Austria | Wien | Leberstraße 120 | Wien | 1110 | equans.***** | 1959 | $114,999,812 | 500 | N/A | N/A | FN100305h |
| 57 | Eggersmann Anlagenbau GMBH | Germany | Harsewinkel | Max-planck-straße 15 | Gütersloh | 33428 | eggersmann-bauwesen.***** | 2015 | $113,799,869 | 40 | N/A | N/A | 33330B8646 |
| 58 | G. Klampfer Elektroanlagen GMBH | Austria | Leonding | Paschingerstraße 104 | Oberösterreich | 4060 | klampfer.***** | 1985 | $112,234,659 | 275 | N/A | N/A | FN268170v |
| 59 | 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 |
| 60 | Weigerstorfer GMBH | Germany | Freyung | Ahornöder Str. 9-13 | Freyung-grafenau | 94078 | weigerstorfer.***** | 1972 | $110,416,179 | 295 | N/A | N/A | 94032B165 |
| 61 | W & K Gesellschaft Fur Industrietechnik Mbh | Germany | Faulbach | Frankenstr. 1 | Miltenberg | 97906 | wk-industrietechnik.***** | 1984 | $105,519,212 | 573 | N/A | N/A | 63739B3932 |
| 62 | Ebg GMBH | Austria | Linz | Emil-rathenau-straße 4 | Oberösterreich | 4030 | ebg-anlagen.***** | 1977 | $104,938,025 | 459 | N/A | N/A | FN224214b |
| 63 | Elektro Kreutzpointner GMBH | Germany | Burghausen | Burgkirchener Str. 3 | Altötting | 84489 | kreutzpointner.***** | 2004 | $104,290,925 | 708 | N/A | N/A | 83278B763 |
| 64 | Bsh GMBH & CO. KG | Germany | Bad Königshofen Im Grabfeld | Bamberger Str. 44 | Rhön-grabfeld | 97631 | bsh-energie.***** | 2025 | $101,819,628 | 280 | N/A | N/A | 97421A8937 |
| 65 | Gebruder Peters Gebäudetechnik SE | Germany | Ingolstadt | Roderstr. 25 | Ingolstadt | 85055 | gebr-peters.***** | 1903 | $101,423,223 | 474 | N/A | N/A | 85049B11399 |
| 66 | Alois Muller GMBH | Germany | Ungerhausen | Gutenbergstr. 12 | Unterallgäu | 87781 | mobile-energy.***** | 2017 | $100,211,113 | 291 | N/A | N/A | 87700B10419 |
| 67 | J. Christof Gesellschaft M.B.H. | Austria | Graz | Glacisstraße 37 | Steiermark | 8010 | jchristof.***** | 1989 | $99,755,826 | 401 | N/A | N/A | FN47620f |
| 68 | Licht Loidl Gesellschaft M.B.H. | Austria | Lafnitz | Lafnitz 186 | Steiermark | 8233 | licht-loidl.***** | 1966 | $98,908,685 | 547 | N/A | N/A | FN65195a |
| 69 | Thermondo GMBH | Germany | Berlin | Prinzenstr. 34 | Berlin, Stadt | 10969 | thermondo.***** | 2024 | $96,742,194 | 746 | N/A | N/A | 10623B129321B |
| 70 | Burkhardt GMBH | Germany | Mühlhausen | Kreutweg 2 | Neumarkt I.d.opf. | 92360 | burkhardt-gruppe.***** | 1879 | $95,208,883 | 500 | N/A | N/A | 90402B7862 |
| 71 | ING. Ludwig Freitag Elektro GMBH & CO. KG | Germany | Parsberg | Ludwig-freitag-str. 3 | Neumarkt I.d.opf. | 92331 | elektro-freitag.***** | 1922 | $89,655,381 | 554 | N/A | N/A | 90402A9417 |
| 72 | Wisag Gebäudetechnik Hessen Mitte GMBH & CO. KG | Germany | Frankfurt am Main | Berner Str. 35 | Frankfurt am Main, Stadt | 60437 | wisag.***** | 2020 | $89,248,965 | 800 | N/A | N/A | 60313A30413 |
| 73 | Marechaux AG | Switzerland | Lucerna | C/o Marechaux Elektro Ag | Luzern | 6005 | marechaux-luzern.***** | 1946 | $86,972,250 | 750 | N/A | N/A | CHE-106.910.680 |
| 74 | Dussmann Kälte- Und Klimatechnik GMBH | Germany | Frankfurt am Main | Stutzeläckerweg 12-14 | Frankfurt am Main, Stadt | 60489 | dka-dresden.***** | 2020 | $82,740,975 | 544 | N/A | N/A | 60313B135782 |
| 75 | Visco GMBH | Germany | Jagstzell | Renneckermuhle 1 | Ostalbkreis | 73489 | visco-ostalb.***** | 2025 | $82,532,671 | 349 | N/A | N/A | 89073B510447 |
| 76 | Etech Schmid U. Pachler Elektrotechnik GMBH & CO KG | Austria | Linz | Hafenstr. 2a | Oberösterreich | 4020 | etech.***** | 1991 | $80,088,289 | 376 | N/A | N/A | FN214211t |
| 77 | D+h Mechatronic AG | Germany | Ammersbek | Georg-sasse-str. 28-32 | Stormarn | 22949 | dh-partner.***** | 1968 | $77,654,839 | 525 | N/A | N/A | 20355B115942 |
| 78 | Imtech Brandschutz GMBH | Germany | Alzenau | Siemensstr. 24-26 | Aschaffenburg | 63755 | imtech.***** | 2013 | $76,111,910 | 373 | N/A | N/A | 63739B10355 |
| 79 | Wilhelm Schetter GMBH Haustechnik | Germany | Kernen Im Remstal | Endersbacher Str. 19 | Rems-murr-kreis | 71394 | schetter.***** | 2022 | $75,180,030 | 262 | N/A | N/A | 70190B261901 |
| 80 | Sar Anlagenbau GMBH | Austria | Amstetten | Bahnhofstraße 34 | Niederösterreich | 3363 | sar-anlagenbau.***** | 2009 | $74,703,874 | 202 | N/A | N/A | FN330076g |
| 81 | Julius Gaiser GMBH | Germany | Ulm | Blaubeurer Str. 86 | Ulm | 89077 | gaiser-online.***** | 1943 | $73,736,214 | 286 | N/A | N/A | 89073B748539 |
| 82 | Pke Gebäudetechnik GMBH | Austria | Wien | Computerstraße 6 | Wien | 1100 | pke.***** | 1979 | $72,357,451 | 296 | N/A | N/A | FN488210g |
| 83 | Rec Solar EMEA GMBH | Germany | München | Balanstr. 71a | München | 81541 | recgroup.***** | 2018 | $72,320,730 | 38 | N/A | N/A | 80333B180306 |
| 84 | Apleona Wolfferts GMBH | Germany | Köln | Hansestr. 1 | Köln, Stadt | 51149 | wolfferts.***** | 2016 | $72,271,811 | 579 | N/A | N/A | 50670B21911 |
| 85 | Agile Robots SE | Germany | München | Plinganserstr. 134 | München | 81369 | agile-robots.***** | 2017 | $71,602,664 | 500 | N/A | N/A | 80333B292066 |
| 86 | Gräss Solartechnik KG | Germany | Bubesheim | Weißenhorner Str. 26 | Günzburg | 89347 | N/A | 2014 | $68,447,091 | 5 | N/A | N/A | 87700A11769 |
| 87 | Solutions 30 Holding GMBH | Germany | Nürnberg | Isarstr. 40 | Nürnberg | 90451 | N/A | 2022 | $68,234,403 | 633 | N/A | N/A | 90402B40911 |
| 88 | ING. Sumetzberger GMBH. | Austria | Wien | Leberstraße 108 | Wien | 1110 | sumetzberger.***** | 1930 | $67,705,660 | 231 | N/A | N/A | FN118934d |
| 89 | Onyx Rohr- Und Kanal-Service GMBH | Germany | Hannover | Vahrenwalder Str. 217 | Region Hannover | 30165 | onyx-rks.***** | 2024 | $67,644,596 | 498 | N/A | N/A | 30175B206162 |
| 90 | E.infra GMBH | Germany | Dresden | Heidelberger Str. 1 | Dresden, Stadt | 01189 | e-infra.***** | 2018 | $67,577,286 | 254 | N/A | N/A | 01067B29659 |
| 91 | Qfm Fernmelde- Und Elektromontagen GMBH | Germany | Berlin | Großbeerenstr. 136 | Berlin, Stadt | 12277 | qfm.***** | 1892 | $67,215,992 | 312 | N/A | N/A | 10623B28881B |
| 92 | Renke Gebäudetechnik GMBH | Germany | Bremen | Am Alten Sicherheitshafen 1 | Bremen, Stadt | 28197 | renke-bremen.***** | 2023 | $67,199,460 | 84 | N/A | N/A | 28195B22763HB |
| 93 | Fäth GMBH | Germany | Klipphausen | Schwabacher Str. 10 | Meißen | 01665 | faeth.***** | 2016 | $66,565,875 | 237 | N/A | N/A | 01067B39801 |
| 94 | Rgm GMBH | Austria | Linz | Freistädter Straße 226 | Oberösterreich | 4040 | wohlschlager-redl.***** | 1997 | $66,080,121 | 10 | N/A | N/A | FN165974f |
| 95 | Sprecher Automation Deutschland GMBH | Germany | Berlin | Rudower Chaussee 9 | Berlin, Stadt | 12489 | sprecher-automation.***** | 2011 | $66,020,455 | 131 | N/A | N/A | 10623B100093B |
| 96 | Polytechnik Luft- Und Feuerungstechnik GMBH | Austria | Weissenbach An der Triesting | Hainfelderstraße 69-71 | Niederösterreich | 2564 | polytechnik.***** | 2000 | $65,874,500 | 100 | N/A | N/A | FN194342y |
| 97 | Bacon Gebäudetechnik GMBH | Austria | Wien | Scherbangasse 20 | Wien | 1230 | bacon.***** | 1987 | $65,209,369 | 270 | N/A | N/A | FN50672v |
| 98 | Aircotech GMBH | Germany | Herne | Heerstr. 74 | Herne, Stadt | 44653 | aircotech-gmbh.***** | 2018 | $64,564,091 | 60 | N/A | N/A | 44787B17181 |
| 99 | K.E.M. Bau GMBH | Austria | Bad Gleichenberg | Kaiser-franz-josef-straße 26 | Steiermark | 8344 | kem.***** | 2003 | $63,726,194 | 228 | N/A | N/A | FN238225g |
| 100 | Weber Industrieller Rohrleitungsbau & Anlagenbau Merseburg GMBH & CO. KG | Germany | Merseburg | Ladegaststr. 4 | Saalekreis | 06217 | weber-unternehmensgruppe.***** | 2009 | $63,719,520 | 600 | N/A | N/A | 39576A32506 |