| 1 | Saipem SPA | Italy | Milano | Via Luigi Russolo 5 | Milano | 20138 | saipem.***** | 1969 | $15,385,683,892 | 6,284 | N/A | N/A | IT00825790157 |
| 2 | Webuild SPA | Italy | Rozzano | Centro Direzionale Milanofiori Snc | Milano | 20089 | N/A | 1959 | $11,661,386,058 | 1,647 | N/A | N/A | IT02895590962 |
| 3 | Salini Costruttori SPA | Italy | Milano | Via del Lauro 3 | Milano | 20121 | salinicostruttori.***** | 1972 | $11,660,752,611 | 50 | N/A | N/A | IT00892101007 |
| 4 | Swietelsky AG | Italy | Andriano | Via del Sole 34 | Bolzano | 39010 | N/A | 2008 | $3,495,562,649 | 11,910 | N/A | N/A | IT02606390215 |
| 5 | Sacyr Construccion S.A. | Italy | Torino | Via Invorio 24/a | Torino | 10146 | sisscpa.***** | 2005 | $3,013,380,355 | 56 | N/A | N/A | IT09177470011 |
| 6 | Elecnor Servicios Y Proyectos S.A. | Italy | San Pietro Mosezzo | Via Alcide de Gasperi 24 | Novara | 28060 | N/A | 2021 | $2,414,641,945 | 1,035 | N/A | N/A | IT02671430037 |
| 7 | Itinera SPA | Italy | Tortona | S.s 10 Per Alessandria 6/a | Alessandria | 15057 | itinera-spa.***** | 1995 | $2,165,375,588 | 996 | N/A | N/A | IT01668980061 |
| 8 | Iren Energia SPA | Italy | Torino | Corso Svizzera 95 | Torino | 10143 | gruppoiren.***** | 2006 | $1,907,740,143 | 572 | N/A | N/A | IT09357630012 |
| 9 | Ferrovial Construcción S.A | Italy | Milano | Via Tiziano 32 | Milano | 20145 | N/A | 1999 | $1,521,840,923 | 13 | N/A | N/A | IT12400940156 |
| 10 | Impresa Pizzarotti & C. SPA | Italy | Parma | Via Madre Anna Maria Adorni 1 | Parma | 43121 | pizzarotti.***** | 1910 | $1,451,514,331 | 683 | N/A | N/A | IT00533290342 |
| 11 | Ghella SPA | Italy | Roma | Via Pietro Borsieri 2/a | Roma | 00195 | ghella.***** | 1894 | $1,323,091,617 | 681 | N/A | N/A | IT00898971007 |
| 12 | Bonatti SPA | Italy | Parma | Via Alfred Bernhard Nobel 2/a | Parma | 43122 | bonattinternational.***** | 1946 | $1,313,919,097 | 831 | N/A | N/A | IT00765080346 |
| 13 | Constructora San Jose' SA | Italy | Milano | Via Leone Xiii 14 | Milano | 20145 | N/A | 2022 | $1,116,419,218 | 7 | N/A | N/A | IT12491580960 |
| 14 | Salcef Group SPA | Italy | Roma | Via Salaria 1027 | Roma | 00138 | salcef.***** | 1987 | $1,059,550,690 | 283 | N/A | N/A | IT01951301009 |
| 15 | N.V. Besix S.A. | Italy | Roma | Via Aurelia Antica 272 | Roma | 00165 | N/A | 1991 | $1,025,315,069 | 119 | N/A | N/A | IT04386411005 |
| 16 | Spie Citynetworks | Italy | Milano | Via Tiziano 32 | Milano | 20145 | N/A | 2021 | $997,289,455 | 30 | N/A | N/A | IT11951040960 |
| 17 | C.M.B. Societa' Cooperativa Muratori E Braccianti Di Carpi | Italy | Carpi | Via Carlo Marx 170 | Modena | 41012 | cmbcarpi.***** | 1908 | $938,409,334 | 668 | N/A | N/A | IT00154410369 |
| 18 | Rizzani De Eccher SPA | Italy | Pozzuolo del Friuli | Via Buttrio 36 | Udine | 33050 | rizzanideeccher.***** | 1970 | $913,778,217 | 282 | N/A | N/A | IT00167700301 |
| 19 | Partecipazioni Italia SPA | Italy | Roma | Via Giulio Vincenzo Bona 65 | Roma | 00156 | N/A | 2021 | $913,195,179 | 681 | N/A | N/A | IT16245161001 |
| 20 | Engie Servizi SPA | Italy | Roma | Viale Giorgio Ribotta 31 | Roma | 00144 | engie.***** | 1985 | $905,158,877 | 1,919 | N/A | N/A | IT01698911003 |
| 21 | Marigliano SPA | Italy | Napoli | Corso Vittorio Emanuele 110/5 | Napoli | 80121 | N/A | 2012 | $899,507,915 | 135 | N/A | N/A | IT07169051211 |
| 22 | Siram SPA | Italy | Milano | Via Anna Maria Mozzoni 12 | Milano | 20152 | siram.***** | 1987 | $885,097,838 | 2,859 | N/A | N/A | IT08786190150 |
| 23 | Amplia Infrastructures SPA | Italy | Roma | Via Giulio Vincenzo Bona 95/101 | Roma | 00156 | ampliaspa.***** | 1970 | $852,016,218 | 1,907 | N/A | N/A | IT00904791001 |
| 24 | Itel SPA | Italy | San Gregorio Di Catania | Via Cerza 4 | Catania | 95027 | aziende.***** | 1973 | $847,737,541 | 135 | N/A | N/A | IT00250450871 |
| 25 | Sicim SPA | Italy | Busseto | Via Consolatico Superiore 96/98 | Parma | 43011 | sicim.***** | 1962 | $840,628,004 | 681 | N/A | N/A | IT00143470342 |
| 26 | Consorzio Cociv | Italy | Genova | Via Renata Bianchi 40 | Genova | 16152 | N/A | 1991 | $773,370,836 | 482 | N/A | N/A | IT03299440101 |
| 27 | Primetals Technologies Austria GMBH | Italy | Bressanone | Via Elvas 8 | Bolzano | 39042 | N/A | 2021 | $751,454,372 | 40 | N/A | N/A | IT03137120212 |
| 28 | Icm SPA | Italy | Vicenza | Viale Dell'Industria 42 | Vicenza | 36100 | gruppoicm.***** | 1969 | $746,480,092 | 681 | N/A | N/A | IT02526350240 |
| 29 | Cefla Soc Coop | Italy | Imola | Via Bicocca 14/c | Bologna | 40026 | cefla.***** | 1932 | $704,703,245 | 1,299 | N/A | N/A | IT00499791200 |
| 30 | Circet Italia SPA | Italy | San Giovanni Teatino | Via Aterno 108 | Chieti | 66020 | circet.***** | 1988 | $697,294,489 | 1,620 | N/A | N/A | IT01481120697 |
| 31 | G.C.F. Generale Costruzioni Ferroviarie SPA | Italy | Roma | Viale Dell'Oceano Atlantico 190 | Roma | 00144 | generalecostruzioniferroviarie.***** | 1990 | $683,284,480 | 681 | N/A | N/A | IT03832621001 |
| 32 | Sirti Telco Infrastructures SPA | Italy | Sesto San Giovanni | Viale Thomas Alva Edison 110 | Milano | 20099 | sirti.***** | 2022 | $630,717,225 | 2,297 | N/A | N/A | IT12492310961 |
| 33 | Consorzio Integra Soc Coop | Italy | Bologna | Via Marco Emilio Lepido 182/2 | Bologna | 40132 | consorziointegra.***** | 2016 | $626,424,688 | 67 | N/A | N/A | IT03530851207 |
| 34 | Salcef SPA | Italy | Roma | Via Salaria 1027 | Roma | 00138 | salcef.***** | 1984 | $621,252,891 | 833 | N/A | N/A | IT12612601000 |
| 35 | Consorzio Iricav Due | Italy | San Martino Buon Albergo | Viale del Lavoro 41/a | Verona | 37036 | N/A | 1991 | $612,589,514 | 237 | N/A | N/A | IT04143521005 |
| 36 | Cepav (consorzio Eni Per L'alta Velocita')due | Italy | Milano | Via Luigi Russolo 5 | Milano | 20138 | N/A | 1991 | $609,032,410 | 119 | N/A | N/A | IT10427570154 |
| 37 | Site SPA | Italy | Bologna | Via del Tuscolano 15 | Bologna | 40128 | sitespa.***** | 1990 | $595,635,402 | 2,999 | N/A | N/A | IT03983200373 |
| 38 | Acquedotto Pugliese SPA | Italy | Bari | Via Salvatore Cognetti 36 | Bari | 70121 | aqp.***** | 1902 | $580,953,989 | 2,269 | N/A | N/A | IT00347000721 |
| 39 | Nidec Asi SPA | Italy | Cinisello Balsamo | Via Fratelli Gracchi 39 | Milano | 20092 | nidec-industrial.***** | 1960 | $556,197,914 | 907 | N/A | N/A | IT03238380962 |
| 40 | Vestas Italia SRL | Italy | Taranto | Via Ludovico Ariosto 12 | Taranto | 74123 | vestas.***** | 1997 | $554,640,663 | 507 | N/A | N/A | IT02170340737 |
| 41 | Takenaka Europe GMBH | Italy | Milano | Via Leone Xiii 14 | Milano | 20145 | N/A | 1973 | $518,051,902 | 2 | N/A | N/A | IT10687890151 |
| 42 | Ericsson Telecomunicazioni SPA | Italy | Roma | Via Anagnina 203 | Roma | 00118 | ericsson.***** | 1918 | $517,296,596 | 1,533 | N/A | N/A | IT00886171008 |
| 43 | Techbau SPA | Italy | Castelletto Sopra Ticino | Via del Lago 57 | Novara | 28053 | techbau.***** | 2008 | $511,381,087 | 231 | N/A | N/A | IT06336690968 |
| 44 | Prime Green Solutions Benefit SPA In Forma Abbreviato Prime Green Solutions SPA SB | Italy | Milano | Via Lentasio 7 | Milano | 20122 | primegreensolutions.***** | 2020 | $487,327,241 | 64 | N/A | N/A | IT11413440964 |
| 45 | Edison Next Government SRL | Italy | Milano | Viale Fulvio Testi 121 | Milano | 20162 | N/A | 1999 | $463,155,338 | 1,019 | N/A | N/A | IT12860530158 |
| 46 | Ar.co. Lavori Soc Coop Consortile | Italy | Ravenna | Via Argirocastro 15 | Ravenna | 48122 | arcolavori.***** | 1999 | $439,094,901 | 35 | N/A | N/A | IT01468160393 |
| 47 | Micoperi SPA | Italy | Ravenna | Via Trieste 279 | Ravenna | 48122 | micoperi.***** | 1996 | $426,589,771 | 500 | N/A | N/A | IT01823211204 |
| 48 | Impresa Tonon SPA | Italy | Colle Umberto | Via Menare' 25 | Treviso | 31014 | impresatonon.***** | 1982 | $418,565,682 | 107 | N/A | N/A | IT01424610267 |
| 49 | G&G SRL | Italy | Modena | Via Armando Pica 170 | Modena | 41126 | N/A | 2020 | $404,539,763 | 50 | N/A | N/A | IT03922580364 |
| 50 | Immobiliareuropea SPA | Italy | Milano | Via Torino 2 | Milano | 20123 | immobiliareuropea.***** | 1996 | $386,039,925 | 50 | N/A | N/A | IT02294610924 |
| 51 | Nokia Solutions And Networks Italia SPA | Italy | Vimercate | Via Energy Park 14 | Monza E Brianza | 20871 | nokia.***** | 2007 | $369,633,020 | 1,225 | N/A | N/A | IT05679490960 |
| 52 | Cpl Concordia Societa' Cooperativa | Italy | Concordia Sulla Secchia | Via Achille Grandi 39 | Modena | 41033 | cpl.***** | 1899 | $368,588,791 | 1,712 | N/A | N/A | IT00154950364 |
| 53 | Bouygues E&S Italia SPA | Italy | Milano | Via Giorgio Stephenson 73 | Milano | 20157 | bouygues-es.***** | 1999 | $359,373,936 | 510 | N/A | N/A | IT12763640153 |
| 54 | Manelli Impresa SPA | Italy | Monopoli | Via Clemente Cancelli 11 | Bari | 70043 | manelli.***** | 2008 | $349,312,898 | 798 | N/A | N/A | IT06746680724 |
| 55 | Sinelec SPA | Italy | Tortona | Strada Provinciale 211 della Lomellina | Alessandria | 15057 | sinelec.***** | 2000 | $342,707,675 | 609 | N/A | N/A | IT07937690019 |
| 56 | Infratrasporti.to SRL | Italy | Torino | Corso Novara 96 | Torino | 10152 | infrato.***** | 2010 | $341,491,800 | 119 | N/A | N/A | IT10319310016 |
| 57 | Cbre Gws SRL | Italy | Milano | Via Caduti Di Marcinelle 3 | Milano | 20134 | cbre.***** | 1979 | $340,074,546 | 500 | N/A | N/A | IT12222600152 |
| 58 | Cossi Costruzioni SPA | Italy | Sondrio | Via Chiavenna 13 | Sondrio | 23100 | cossi.***** | 1983 | $337,096,448 | 555 | N/A | N/A | IT00617100144 |
| 59 | Implenia Civil Engineering GMBH | Italy | Bolzano | Via Vincenzo Lancia 8/c | Bolzano | 39100 | N/A | 2021 | $329,116,686 | 56 | N/A | N/A | IT03120900216 |
| 60 | Valtellina SPA | Italy | Gorle | Via Michelangelo Buonarroti 34 | Bergamo | 24020 | valtellinaspa.***** | 1937 | $326,594,227 | 1,817 | N/A | N/A | IT00222840167 |
| 61 | Getec Italia SPA | Italy | Gragnano Trebbiense | Via Madre Teresa Di Calcutta 12 | Piacenza | 29010 | getec-italia.***** | 2006 | $326,539,349 | 1,041 | N/A | N/A | IT02126260062 |
| 62 | Conpat Scarl | Italy | Roma | Viale Giulio Cesare 71 | Roma | 00192 | aziende.***** | 2008 | $325,082,281 | 15 | N/A | N/A | IT06044391214 |
| 63 | Telebit SPA | Italy | Casier | Via Marco Fanno 1 | Treviso | 31030 | telebit.***** | 1989 | $316,532,735 | 914 | N/A | N/A | IT01144610936 |
| 64 | Vianini Lavori SPA | Italy | Roma | Via Barberini 11 | Roma | 00187 | vianinilavori.***** | 1980 | $310,509,729 | 500 | N/A | N/A | IT01252951007 |
| 65 | Co.ge.fa. SPA | Italy | Torino | Corso Principe Eugenio 18 | Torino | 10122 | cogefaspa.***** | 1973 | $292,356,130 | 681 | N/A | N/A | IT00982520017 |
| 66 | A.G. SRL | Italy | Pescara | Via Raiale 118/6 | Pescara | 65128 | N/A | 1998 | $292,200,202 | 22 | N/A | N/A | IT00994570679 |
| 67 | Danieli Automation SPA | Italy | Buttrio | Via Bonaldo Stringher 4 | Udine | 33042 | dca.***** | 1969 | $280,338,980 | 515 | N/A | N/A | IT00162990303 |
| 68 | Carron CAV. Angelo SPA | Italy | San Zenone Degli Ezzelini | Via Bosco 14/1 | Treviso | 31020 | carron.***** | 1967 | $269,620,487 | 222 | N/A | N/A | IT01835800267 |
| 69 | Comal SPA | Italy | Montalto Di Castro | Strada Statale Aurelia | Viterbo | 01014 | comalgroup.***** | 2001 | $252,173,873 | 500 | N/A | N/A | IT01685280560 |
| 70 | Ferro Berica SRL | Italy | Vicenza | Via Dell'Edilizia 22 | Vicenza | 36100 | alfaacciai.***** | 1973 | $251,887,524 | 155 | N/A | N/A | IT00205120249 |
| 71 | Gemmo SPA | Italy | Arcugnano | Via Dell'Industria 2 | Vicenza | 36057 | gemmo.***** | 1919 | $246,097,896 | 905 | N/A | N/A | IT03214610242 |
| 72 | Iren Smart Solutions SPA | Italy | Reggio Emilia | Via Nubi Di Magellano 30 | Reggio Nell'Emilia | 42123 | gruppoiren.***** | 2005 | $245,035,094 | 490 | N/A | N/A | IT02184890354 |
| 73 | Cebat SPA | Italy | Roma | Via Angelo Banti 26/28 | Roma | 00138 | cebat.***** | 2019 | $240,490,905 | 1,298 | N/A | N/A | IT15324221009 |
| 74 | S.i.t.a.f. Societa' Italiana Traforo Autostradale Del Frejus SPA | Italy | Susa | Via San Giuliano 2 | Torino | 10059 | sitaf.***** | 1960 | $240,072,380 | 681 | N/A | N/A | IT00513170019 |
| 75 | Sirjo Societa' Consortile Per Azioni | Italy | Roma | Via Giulio Vincenzo Bona 65 | Roma | 00156 | N/A | 2012 | $233,013,951 | 700 | N/A | N/A | IT11886301008 |
| 76 | G.D.L. SPA | Italy | Torino | Via Orbetello 54/d | Torino | 10148 | remail.***** | 1985 | $229,908,666 | 118 | N/A | N/A | IT10062800015 |
| 77 | Enel X Italia SRL | Italy | Roma | Via Luigi Boccherini 15 | Roma | 00198 | N/A | 2014 | $228,164,678 | 500 | N/A | N/A | IT13111961002 |
| 78 | Consorzio Stabile Sis Scpa | Italy | Torino | Corso Vittorio Emanuele Ii 178 | Torino | 10138 | N/A | 2003 | $226,247,964 | 1,396 | N/A | N/A | IT08679430010 |
| 79 | R.C.M. Costruzioni SRL | Italy | Sarno | Via Pioppazze 81 | Salerno | 84087 | palazzopostesalerno.***** | 1983 | $225,772,784 | 327 | N/A | N/A | IT01808910655 |
| 80 | Sirti Digital Solutions SPA | Italy | Sesto San Giovanni | Viale Thomas Alva Edison 110 | Milano | 20099 | sirti.***** | 2006 | $224,772,305 | 500 | N/A | N/A | IT12492300962 |
| 81 | Colombo Costruzioni SPA | Italy | Lecco | Via Nino Bixio 4 | Lecco | 23900 | colombo-costruzioni.***** | 1905 | $223,794,402 | 175 | N/A | N/A | IT01201550132 |
| 82 | So.i.ge.a. SPA | Italy | Sarno | Via Ingegno | Salerno | 84087 | N/A | 1997 | $223,710,225 | 1,000 | N/A | N/A | IT07618220631 |
| 83 | Costruzioni Linee Ferroviarie SPA | Italy | Bologna | Via della Cooperazione 34 | Bologna | 40129 | clfspa.***** | 1945 | $220,617,650 | 681 | N/A | N/A | IT01925561209 |
| 84 | Societa' Autostrada Ligure Toscana -Pa | Italy | Camaiore | Via Don Enrico Tazzoli 9 | Lucca | 55041 | salt.***** | 1961 | $218,523,273 | 681 | N/A | N/A | IT00140570466 |
| 85 | NOOTER/ERIKSEN SRL | Italy | Cardano al Campo | Via Alessandro Volta 50 | Varese | 21010 | ne.***** | 2005 | $217,607,040 | 500 | N/A | N/A | IT02222190023 |
| 86 | Dacia SRL | Italy | Pescara | Strada Colle Renazzo 49 | Pescara | 65129 | N/A | 2008 | $216,938,166 | 4 | N/A | N/A | IT01856320682 |
| 87 | Fincantieri Infrastrutture Sociali SPA | Italy | Roma | Via Tiburtina 1072 | Roma | 00156 | N/A | 2020 | $214,669,874 | 125 | N/A | N/A | IT15952111001 |
| 88 | Domus SRL | Italy | Napoli | Via Giovanni Porzio | Napoli | 80143 | reworkspace.***** | 2014 | $214,368,134 | 66 | N/A | N/A | IT07904281214 |
| 89 | Seli Overseas SPA | Italy | Roma | Via Giulio Vincenzo Bona 120 | Roma | 00156 | N/A | 2014 | $213,590,780 | 638 | N/A | N/A | IT12720621007 |
| 90 | Consorzio Armatori Ferroviari Scpa - Consorzio Stabile | Italy | Lecce | Via Duca D'Aosta 34 | Lecce | 73100 | N/A | 2001 | $212,202,781 | 12 | N/A | N/A | IT03559490754 |
| 91 | Imagro Construction SRL | Italy | Milano | Corso Giacomo Matteotti 3 | Milano | 20121 | imagro.***** | 2016 | $212,201,744 | 119 | N/A | N/A | IT09399790964 |
| 92 | Consorzio Tunnel Giovi | Italy | Parma | Via Madre Anna Maria Adorni 1 | Parma | 43121 | N/A | 2017 | $211,826,650 | 307 | N/A | N/A | IT02852220348 |
| 93 | Frantoio Fondovalle SRL | Italy | Marano Sul Panaro | Via Fondovalle 3199 | Modena | 41054 | frantoiofondovalle.***** | 1964 | $209,735,298 | 681 | N/A | N/A | IT00279260368 |
| 94 | Otis Servizi SRL | Italy | Cassina De' Pecchi | Via Roma 108 | Milano | 20051 | otis.***** | 1999 | $209,007,867 | 948 | N/A | N/A | IT01729590032 |
| 95 | Strada Dei Parchi SPA | Italy | Roma | Via Giulio Vincenzo Bona 105 | Roma | 00156 | stradadeiparchi.***** | 2002 | $207,889,673 | 364 | N/A | N/A | IT07183041008 |
| 96 | Pichler Immobili E Servizi SRL In Breve Pichler I&S SRL | Italy | Bolzano | Via Thomas Alva Edison 15 | Bolzano | 39100 | N/A | 1978 | $207,327,666 | 22 | N/A | N/A | IT00504690215 |
| 97 | INC SPA | Italy | Torino | Corso Vittorio Emanuele Ii 178 | Torino | 10138 | sipal.***** | 1990 | $207,278,746 | 681 | N/A | N/A | IT07358260011 |
| 98 | Fisia Italimpianti SPA | Italy | Genova | Via de Marini 1 | Genova | 16149 | fisiait.***** | 1998 | $203,709,247 | 141 | N/A | N/A | IT02340830997 |
| 99 | Consorzio Stabile Grandi Lavori Scarl | Italy | Roma | Piazza del Popolo 18 | Roma | 00187 | N/A | 2007 | $201,923,234 | 2 | N/A | N/A | IT04490580653 |
| 100 | Costruzioni Giemme SRL | Italy | Milano | Via Ippolito Rosellini 12 | Milano | 20124 | N/A | 2013 | $200,998,639 | 18 | N/A | N/A | IT08463790967 |