| 1 | Xinjiang Yaxin Baojie Heating & Ventilation Engineering CO., LTD. | China | Urumqi | (12th Division) Economic and Technological Development Zone (tou | Xinjiang | 830000 | N/A | 2015 | $22,710,815,638 | 6 | N/A | N/A | 650104050103764 |
| 2 | Lik Kai Engineering Company LIMITED | Hongkong | Kwun Tong District | 5/f New East Sun Indl Bldg | Kwun Tong District | N/A | likkai.***** | 1982 | $19,227,307,800 | 170 | N/A | N/A | 08034865 |
| 3 | 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 |
| 4 | Johnson Controls, INC. | USA | Milwaukee | 5757 N Green Bay Ave | Milwaukee | 53209 | johnsoncontrols.***** | 1900 | $15,507,840,441 | 126,377 | N/A | N/A | 1 J03577 |
| 5 | Nafto-Construct Denmark, Filial Af Nafto-Construct SPOLKA Z Ograniczona Odpowiedzialnoscia | Denmark | København | H.c. Andersens Boulevard 37, Sal 4th | Hovedstaden | 1553 | N/A | 2022 | $8,941,530,400 | 25 | N/A | N/A | 43568698 |
| 6 | Al-Taroose Company For General Contracting LTD | Iraq | Baghdad | Q611, H 72 Almansour | N/A | N/A | N/A | 2004 | $5,393,351,190 | 12 | N/A | N/A | 16424 |
| 7 | Southland Industries | USA | Garden Grove | 12131 Western Ave | Orange | 92841 | southlandind.***** | 1949 | $2,841,379,040 | 2,150 | N/A | N/A | 951596533 |
| 8 | Iberdrola Australia (us) 2 PTY LIMITED | Australia | Sydney | Level 17 56 Pitt Street | New South Wales | 2000 | infigenenergy.***** | 2007 | $2,790,458,418 | 13 | N/A | N/A | 124181611 |
| 9 | Iberdrola Australia (us) PTY LIMITED | Australia | Sydney | Level 17 56 Pitt Street | New South Wales | 2000 | infigenenergy.***** | 2005 | $2,790,458,418 | 13 | N/A | N/A | 116107932 |
| 10 | Iberdrola Australia Europe 4 PTY LIMITED | Australia | Sydney | Level 17 56 Pitt Street | New South Wales | 2000 | infigenenergy.***** | 2007 | $2,790,458,418 | 13 | N/A | N/A | 125319762 |
| 11 | Henan Mingzheng Construction CO., LTD | China | Puyang | No. 06, Hongmiao Village West, Pucheng Town, Fan County | Henan | 457000 | N/A | 2021 | $2,689,422,214 | 66 | N/A | N/A | 410926000112551 |
| 12 | Longstaff And Shaw (heating) LIMITED | Unitedkingdom | Croydon | 602 Purley Way | London | CR0 4RF | N/A | 1968 | $2,676,912,418 | 69 | N/A | N/A | 00926623 |
| 13 | Takasago Thermal Engineering CO., LTD. | Japan | Shinjuku-ku | 6-27-30, Shinjuku | Tōkyō | 160-0022 | N/A | 1923 | $2,559,418,666 | 5,858 | N/A | N/A | 3010001008749 |
| 14 | Jinan Energy Group Co.,ltd. | China | Jinan | No.3, Jiefang E. Road, Lixia District | Shandong | 250000 | N/A | 2020 | $2,377,898,343 | 269 | N/A | N/A | 370100000055426 |
| 15 | 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 |
| 16 | Paloma Rheem Investments, INC. | USA | New York City | 405 Lexington Ave Fl 26 | New York | 10174 | N/A | 1984 | $2,103,219,582 | 6,500 | N/A | N/A | N/A |
| 17 | Sunrun INC. | USA | San Francisco | 600 California St Fl 18 | San Francisco | 94108 | sunrun.***** | 2007 | $2,037,719,000 | 11,058 | N/A | N/A | 4564662 |
| 18 | Iberdrola Australia Investments 2 PTY LIMITED | Australia | Sydney | Level 17 56 Pitt Street | New South Wales | 2000 | infigenenergy.***** | 2017 | $1,954,485,010 | 66 | N/A | N/A | 623187299 |
| 19 | Iren Energia SPA | Italy | Torino | Corso Svizzera 95 | Torino | 10143 | gruppoiren.***** | 2006 | $1,907,740,143 | 572 | N/A | N/A | IT09357630012 |
| 20 | Shinryo CORPORATION | Hongkong | San Po Kong | Rm 1103-05 11/f Port 33 | Wong Tai Sin District | N/A | N/A | 1984 | $1,882,417,152 | 300 | N/A | N/A | 05412537 |
| 21 | Taikisha LTD. | Japan | Shinjuku-ku | 8-17-1, Nishishinjuku | Tōkyō | 160-0023 | N/A | 1913 | $1,852,277,672 | 5,267 | N/A | N/A | 7011101011812 |
| 22 | Dai-Dan CO., LTD. | Japan | Osaka | 1-9-25, Edobori, Nishi-ku | Ōsaka | 550-0002 | N/A | 1903 | $1,761,880,792 | 2,445 | N/A | N/A | 6120001045084 |
| 23 | Black & Mcdonald Group LIMITED | Canada | Toronto | 2 Bloor St E Suite 2100 | Ontario | M4W 1A8 | blackandmcdonald.***** | 2017 | $1,760,512,000 | 6,500 | N/A | N/A | N/A |
| 24 | Sanki Engineering CO., LTD. | Japan | Chuo-ku | 8-1, Akashicho | Tōkyō | 104-0044 | N/A | 1925 | $1,697,530,016 | 2,653 | N/A | N/A | 2010001008683 |
| 25 | Axima Concept | France | Courbevoie | 49-51 | Hauts-de-seine | 92400 | N/A | 1954 | $1,608,713,899 | 6,268 | N/A | N/A | 85480074501737 |
| 26 | Scotia Gas Networks LIMITED | Unitedkingdom | Horley | St Lawrence House | Surrey | RH6 9HJ | sgn.***** | 2003 | $1,603,494,986 | 4,865 | N/A | N/A | 04958135 |
| 27 | Shinryo CORPORATION | Japan | Shinjuku-ku | 1-6-1, Yotsuya | Tōkyō | 160-0004 | N/A | 1956 | $1,553,760,984 | 2,229 | N/A | N/A | 8011101010326 |
| 28 | American Residential Services LLC | USA | Memphis | 965 Ridge Lake Blvd Ste 201 | Shelby | 38120 | ars.***** | 2014 | $1,524,770,283 | 8,030 | N/A | N/A | 2823327 |
| 29 | Acco Engineered Systems, INC. | USA | Pasadena | 888 E Walnut St | Los Angeles | 91101 | accoes.***** | 1934 | $1,512,722,000 | 1,950 | N/A | N/A | 0246091 |
| 30 | Black & Mcdonald LIMITED | Canada | Toronto | 2100-2 Bloor St E | Ontario | M4W 1A8 | blackandmcdonald.***** | 2017 | $1,489,664,000 | 5,500 | N/A | N/A | N/A |
| 31 | Tesla Energy Operations, INC. | USA | San Mateo | 3055 Clearview Way | San Mateo | 94402 | tesla.***** | 2016 | $1,419,209,637 | 12,000 | N/A | N/A | 4178768 |
| 32 | Capital East Solar PTY LIMITED | Australia | Sydney | Level 17 56 Pitt Street | New South Wales | 2000 | N/A | 2012 | $1,406,329,666 | 13 | N/A | N/A | 159005973 |
| 33 | Hong'an County Boiler Installation Repairing CO., LTD. | China | Huanggang | No.29, Chaoyang Street, Chengguan Town, Hong'An County | Hubei | 438400 | N/A | 1998 | $1,214,600,112 | 6 | N/A | N/A | 421122000019655 |
| 34 | Mes Holding CORPORATION | USA | Norwalk | 301 Merritt 7 | Fairfield | 06851 | emcorgroup.***** | 1994 | $1,176,910,439 | 700 | N/A | N/A | N/A |
| 35 | Emcor Construction Services, INC. | USA | Norwalk | 301 Merritt 7 Fl 6 | Fairfield | 06851 | emcorgroup.***** | 1992 | $1,176,910,439 | 700 | N/A | N/A | 2295158 |
| 36 | Renewable Enegery Systems Private LIMITED | India | Hyderabad | D-52&d-13, Phase V, Ida, Jeedimetla | Telangana | 500855 | N/A | 2007 | $1,137,632,300 | 14 | N/A | N/A | N/A |
| 37 | 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 |
| 38 | Bravida Sverige AB | Sweden | Stockholm | Mikrofonvägen 28 | Stockholms Län | 12638 | bravida.***** | 1978 | $1,111,757,911 | 5,000 | N/A | N/A | 5561974188 |
| 39 | Itn Installatietechniek B.V. | Netherlands | Ede | Maxwellstraat 49 C 1 | Gelderland | 6716 BX | itn.***** | 2022 | $1,086,505,927 | 140 | N/A | N/A | 09045446 |
| 40 | Tm Techniek B.V. | Netherlands | Woudenberg | Voskuilerweg 49 A | Utrecht | 3931 MV | tm-techniek.***** | 2023 | $1,077,431,843 | 30 | N/A | N/A | 32108616 |
| 41 | Newcastle Pipe Line Company PTY LIMITED | Australia | Sydney | L 24 2 Market St | New South Wales | 2000 | caltex.***** | 1979 | $1,023,969,985 | 9,115 | N/A | N/A | 001764012 |
| 42 | Cegelec Industry B.V. | Netherlands | Dordrecht | Laan van Europa 450 | Zuid-holland | 3317 DB | vinci-facilities.***** | 2015 | $1,004,371,396 | 265 | N/A | N/A | 56833695 |
| 43 | Schilt Bedrijven B.V. | Netherlands | Vianen | Energieweg 29 | Utrecht | 4231 DJ | schiltbedrijven.***** | 2022 | $1,004,371,396 | 99 | N/A | N/A | 23044288 |
| 44 | Unica Fire Safety B.V. | Netherlands | Nijkerk | De Beek 18 | Gelderland | 3871 MS | unica.***** | 2014 | $990,626,964 | 100 | N/A | N/A | 59207426 |
| 45 | Unica Energy Solutions B.V. | Netherlands | Nijkerk | De Wel 15 | Gelderland | 3871 MT | unica.***** | 2001 | $990,626,964 | 25 | N/A | N/A | 17051074 |
| 46 | Pranger-Rosier Installaties B.V. | Netherlands | Dokkum | Beurtvaart 2 | Friesland | 9101 RB | pranger-rosier.***** | 1988 | $990,626,964 | 198 | N/A | N/A | 01035609 |
| 47 | Installatiebedrijf Otte B.V. | Netherlands | Sneek | Edisonstraat 12 | Friesland | 8606 JJ | otte-installaties.***** | 2021 | $990,626,964 | 33 | N/A | N/A | 01031372 |
| 48 | Mckinstry CO., LLC | USA | Seattle | 5005 3rd Ave S | King | 98134 | mckinstry.***** | 1960 | $961,119,328 | 1,300 | N/A | N/A | 910715040 |
| 49 | Wuhan Shiji Weicheng Mechanical & Electrical Engineering CO., LTD. | China | Wuhan | No.0580, Building, Building 4, Phase 1, International Gangtie Lo | Hubei | 430000 | N/A | 2020 | $948,804,615 | 66 | N/A | N/A | 420107000324762 |
| 50 | Acter Group CORPORATION LIMITED | Taiwan | Taichung City | 19f-1, No. 201, Wenxin Rd., Sec. 2 | Taichung City | 407544 | N/A | 1979 | $931,364,865 | 2,069 | N/A | N/A | 52524653 |