| 1 | Step Energy Services LTD | Canada | Calgary | 1200-205 5 Ave Sw Bow Valley Square Ii | Alberta | T2P 2V7 | stepenergyservices.***** | 2011 | $680,730,324 | 1,178 | N/A | N/A | N/A |
| 2 | Chemco Electrical Contractors LTD | Canada | Nisku | 3135 4 St | Alberta | T9E 8L1 | chemco.***** | 1963 | $588,772,500 | 2,500 | N/A | N/A | N/A |
| 3 | Bell Solutions Techniques INC. | Canada | Boucherville | 200-75 Rue J.-a.-bombardier | Québec | J4B 8P1 | bell.***** | 2000 | $588,772,500 | 2,500 | N/A | N/A | 3708284 |
| 4 | Plan Group INC | Canada | Concord | 2740 Steeles Ave W | Ontario | L4K 4T4 | plan-group.***** | 1955 | $471,018,000 | 2,000 | N/A | N/A | N/A |
| 5 | Ainsworth INC | Canada | Toronto | 131 Bermondsey Rd | Ontario | M4A 1X4 | ainsworth.***** | 1946 | $353,263,500 | 1,500 | N/A | N/A | N/A |
| 6 | 539899 Alberta LTD. | Canada | Nisku | 2302 8 St | Alberta | T9E 7Z2 | ptwenergy.***** | 1993 | $306,868,227 | 1,303 | N/A | N/A | N/A |
| 7 | Ptw Industrial Services LTD | Canada | Nisku | 2308 8 St | Alberta | T9E 7Z2 | ptwenergy.***** | 2010 | $306,161,700 | 1,300 | N/A | N/A | N/A |
| 8 | The State Group INC | Canada | Mississauga | 3206 Orlando Dr | Ontario | L4V 1R5 | stategroup.***** | 2001 | $282,610,800 | 1,200 | N/A | N/A | N/A |
| 9 | Creative Vistas Acquisition CORP | Canada | Whitby | 2100 Forbes St | Ontario | L1N 9T3 | actechnical.***** | 2004 | $270,835,350 | 1,150 | N/A | N/A | N/A |
| 10 | Solotech INC | Canada | Montréal | 5200 Rue Hochelaga | Québec | H1V 1G3 | solotech.***** | 2006 | $231,740,856 | 984 | N/A | N/A | N/A |
| 11 | Houle Electric LIMITED | Canada | Burnaby | 5050 North Fraser Way | British Columbia | V5J 0H1 | houle.***** | 1944 | $211,958,100 | 900 | N/A | N/A | N/A |
| 12 | Ozz Electric INC | Canada | Concord | A-20 Floral Pky | Ontario | L4K 4R1 | ozzelectric.***** | 1991 | $188,407,200 | 800 | N/A | N/A | N/A |
| 13 | G.J. Cahill & Company (1979) LIMITED | Canada | St. John'S | 240 Waterford Bridge Rd Suite 1000 | Newfoundland and Labrador | A1E 1E2 | gjcahill.***** | 1979 | $176,631,750 | 750 | N/A | N/A | N/A |
| 14 | Canem Systems LTD | Canada | Richmond | 1358-13351 Commerce Pky | British Columbia | V6V 2X7 | canem.***** | 1972 | $162,972,228 | 692 | N/A | N/A | N/A |
| 15 | Guild Electric Holdings LIMITED | Canada | Toronto | 470 Midwest Rd | Ontario | M1P 4Y5 | guildelectric.***** | 1999 | $153,080,850 | 650 | N/A | N/A | N/A |
| 16 | Borealis Holdings Trust Management INC | Canada | Toronto | 200 Bay St S Suite 2100 | Ontario | M5J 2J2 | borealis.***** | 2001 | $153,080,850 | 650 | N/A | N/A | N/A |
| 17 | Expertech Batisseur De Reseaux INC | Canada | Montréal | 2555 Boul de L'Assomption | Québec | H1N 2G8 | expertech.***** | 1996 | $117,754,500 | 500 | N/A | N/A | N/A |
| 18 | Trylon Tsf INC | Canada | Elmira | 21 South Field Dr | Ontario | N3B 0A6 | trylon.***** | 2006 | $117,754,500 | 500 | N/A | N/A | N/A |
| 19 | Gastier M.P. INC | Canada | Montréal | 10400 Boul Du Golf | Québec | H1J 2Y7 | gastier.***** | 2003 | $117,754,500 | 500 | N/A | N/A | N/A |
| 20 | Guild Electric LIMITED | Canada | Toronto | 470 Midwest Rd | Ontario | M1P 4Y5 | guildelectric.***** | 1954 | $117,754,500 | 500 | N/A | N/A | N/A |
| 21 | Norcan Electric INC | Canada | Fort Mcmurray | 6b-380 Mackenzie Blvd | Alberta | T9H 4C4 | norcanelectric.***** | 2005 | $117,754,500 | 500 | N/A | N/A | N/A |
| 22 | Mde Enterprises LTD | Canada | Vancouver | 3947 Graveley St | British Columbia | V5C 3T4 | mde-electrical.***** | 1989 | $102,210,906 | 434 | N/A | N/A | N/A |
| 23 | Powell Canada INC | Canada | Acheson | 10960 274 St | Alberta | T7X 6P7 | N/A | 2022 | $94,203,600 | 400 | N/A | N/A | 14171551 |
| 24 | Laird Electric INC | Canada | Edmonton | 6707 59 St Nw | Alberta | T6B 3P8 | churchillcorporation.***** | 2003 | $94,203,600 | 400 | N/A | N/A | N/A |
| 25 | J.M.R. Electric LTD | Canada | Exeter | 301 Thames Rd E | Ontario | N0M 1S3 | jmrelectric.***** | 1978 | $89,493,420 | 380 | N/A | N/A | N/A |
| 26 | Ceb Investments INC | Canada | Calgary | 250 42 Ave Se | Alberta | T2G 1Y4 | N/A | 1981 | $84,783,240 | 360 | N/A | N/A | N/A |
| 27 | Arno Electrique Ltee | Canada | Trois-rivières | 2300 Boul Des Recollets | Québec | G8Z 3X5 | arno.***** | 1958 | $82,428,150 | 350 | N/A | N/A | 308951 |
| 28 | Roberts Onsite INC | Canada | Kitchener | 209 Manitou Dr | Ontario | N2C 1L4 | robertsonsite.***** | 1938 | $82,428,150 | 350 | N/A | N/A | N/A |
| 29 | Alliance Energy LIMITED | Canada | Regina | 504 Henderson Dr | Saskatchewan | S4N 5X2 | alliance-energy.***** | 1983 | $82,428,150 | 350 | N/A | N/A | N/A |
| 30 | Ocp Communications INC | Canada | Burlington | 601-2319 Fairview St | Ontario | L7R 2E3 | dependablehometech.***** | 1997 | $80,073,060 | 340 | N/A | N/A | N/A |
| 31 | Polaris Renewable Energy INC | Canada | Toronto | 7 St. Thomas St Suite 606 | Ontario | M5S 2B7 | polarisrei.***** | 1984 | $75,771,000 | 235 | N/A | N/A | N/A |
| 32 | Lambert Somec INC | Canada | Québec | 1505 Rue Des Tanneurs | Québec | G1N 4S7 | lambertsomec.***** | 1961 | $70,652,700 | 300 | N/A | N/A | N/A |
| 33 | O'connor Electric LTD | Canada | Kitchener | 2-9 Centennial Rd | Ontario | N2B 3E9 | oconnorelec.***** | 1987 | $70,652,700 | 300 | N/A | N/A | N/A |
| 34 | East Thames Holdings INC | Canada | Exeter | 301 Thames Rd E | Ontario | N0M 1S3 | N/A | 1989 | $70,652,700 | 300 | N/A | N/A | N/A |
| 35 | Cdn Controls LTD | Canada | Calgary | 1400e 311 6th Ave Sw | Alberta | T2P 3H3 | cdncontrols.***** | 2011 | $70,652,700 | 300 | N/A | N/A | N/A |
| 36 | H.E.L. Investments LTD | Canada | Burnaby | 5050 North Fraser Way | British Columbia | V5J 0H1 | houle.***** | 1983 | $70,652,700 | 300 | N/A | N/A | N/A |
| 37 | Concept Industries LTD | Canada | Calgary | 1260 Highfield Cres Se | Alberta | T2G 5M3 | conceptgroup.***** | 2000 | $68,297,610 | 290 | N/A | N/A | N/A |
| 38 | Integral Energy Services LTD | Canada | Airdrie | 101-2890 Kingsview Blvd Se | Alberta | T4A 0E1 | integralenergy.***** | 2006 | $64,764,975 | 275 | N/A | N/A | N/A |
| 39 | Layfield Group LIMITED | Canada | Richmond | 11120 Silversmith Pl | British Columbia | V7A 5E4 | layfieldgroup.***** | 1978 | $63,587,430 | 270 | N/A | N/A | N/A |
| 40 | Smith And Long LIMITED | Canada | Markham | 115 Idema Rd | Ontario | L3R 1A9 | smithandlong.***** | 1949 | $61,232,340 | 260 | N/A | N/A | N/A |
| 41 | Iskueteu, LIMITED Partnership | Canada | St. John'S | 240 Waterford Bridge Rd | Newfoundland and Labrador | A1E 1E2 | N/A | 2002 | $60,996,831 | 259 | N/A | N/A | N/A |
| 42 | Custom Electric LTD | Canada | Calgary | 1725 27 Ave Ne | Alberta | T2E 7E1 | customelectric.***** | 2024 | $58,877,250 | 250 | N/A | N/A | N/A |
| 43 | Voith Hydro INC. | Canada | Brossard | 160-9955 Rue de Chateauneuf | Québec | J4Z 3V5 | N/A | 2017 | $58,877,250 | 250 | N/A | N/A | 10340731 |
| 44 | Pillar Resource Services INC | Canada | Calgary | 502, 550 - 11 Ave Sw | Alberta | T2R 1M7 | pillar.***** | 1983 | $58,877,250 | 250 | N/A | N/A | N/A |
| 45 | S. & T. Electrical Contractors LIMITED | Canada | Sault Ste Marie | 158 Sackville Rd | Ontario | P6B 4T6 | stgroup.***** | 1984 | $58,877,250 | 250 | N/A | N/A | N/A |
| 46 | 2950-0519 Quebec INC | Canada | Rouyn-noranda | 160 Boul Industriel | Québec | J9X 6T3 | moreau.***** | 2012 | $58,877,250 | 250 | N/A | N/A | N/A |
| 47 | Nightingale Electrical LTD | Canada | Richmond | 143-11121 Horseshoe Way | British Columbia | V7A 5G7 | nightelect.***** | 1984 | $58,877,250 | 250 | N/A | N/A | N/A |
| 48 | Mott Electric General Partnership | Canada | Burnaby | 100-4599 Tillicum St | British Columbia | V5J 3J9 | mottelectric.***** | 1930 | $58,877,250 | 250 | N/A | N/A | N/A |
| 49 | J.Y. Moreau Électrique INC | Canada | Rouyn-noranda | 160 Boul Industriel | Québec | J9X 6T3 | beroma.***** | 2018 | $58,877,250 | 250 | N/A | N/A | N/A |
| 50 | Allwest Electric LTD | Canada | Port Coquitlam | 110-2250 Fremont St | British Columbia | V3B 0M3 | allwestelectric.***** | 2004 | $58,877,250 | 250 | N/A | N/A | N/A |
| 51 | Solutions Informatiques Inso INC. | Canada | Montréal | 6615 Av Du Parc | Québec | H2V 4J1 | inso.***** | 2007 | $58,641,741 | 249 | N/A | N/A | 4414179 |
| 52 | Studon Electric & Controls INC | Canada | Red Deer | 102-8024 Edgar Industrial Cres | Alberta | T4P 3R3 | studon.***** | 1991 | $57,935,214 | 246 | N/A | N/A | N/A |
| 53 | Speedy Electrical Contractors LIMITED | Canada | Woodbridge | 114 Caster Ave Suite A | Ontario | L4L 5Y9 | speedyelectric.***** | 1975 | $54,167,070 | 230 | N/A | N/A | N/A |
| 54 | Électricite Grimard INC | Canada | Saguenay | 1235 Rue Bersimis | Québec | G7K 1A4 | grimard.***** | 1987 | $54,167,070 | 230 | N/A | N/A | N/A |
| 55 | Sutherland-Schultz LTD | Canada | Cambridge | 201-150 Water St S | Ontario | N1R 3E2 | sutherland-schultz.***** | 1922 | $52,989,525 | 225 | N/A | N/A | N/A |
| 56 | Status Electrical CORPORATION | Canada | Abbotsford | 2669 Deacon St | British Columbia | V2T 6L4 | statusteam.***** | 1979 | $49,456,890 | 210 | N/A | N/A | N/A |
| 57 | A.P.I. Alarm INC | Canada | Toronto | 700-5775 Yonge St | Ontario | M2M 4J1 | apialarm.***** | 2024 | $48,043,836 | 204 | N/A | N/A | N/A |
| 58 | Holland Power Services INC | Canada | Maugerville | 272 Route 105 | New Brunswick | E3A 8G2 | ehollandcontracting.***** | 2021 | $47,572,818 | 202 | N/A | N/A | N/A |
| 59 | Tyco Integrated Fire & Security Canada, INC | Canada | Mississauga | 2400 Skymark Ave Bureau 1 | Ontario | L4W 5K5 | tycoifs.***** | 1999 | $47,101,800 | 200 | N/A | N/A | N/A |
| 60 | Allstream Business INC. | Canada | Markham | 7550 Birchmount Rd | Ontario | L3R 6C6 | N/A | 1985 | $47,101,800 | 200 | N/A | N/A | N/A |
| 61 | Energylink CORPORATION | Canada | Calgary | 700 4th Ave Sw Suite 1900 | Alberta | T2P 3J4 | energylinkinternational.***** | 1993 | $45,648,364 | 30 | N/A | N/A | N/A |
| 62 | High Line Electrical Constructors LTD | Canada | Leduc | 3915 82 Ave | Alberta | T9E 8M3 | highline.***** | 2006 | $44,746,710 | 190 | N/A | N/A | N/A |
| 63 | La Cie Électrique Britton Ltee | Canada | Mont-royal | 213-8555 Ch Devonshire | Québec | H4P 2L3 | britton.***** | 1954 | $43,565,800 | 200 | N/A | N/A | N/A |
| 64 | Bow-Alta Electric LTD | Canada | Calgary | E-1165 44 Ave Se | Alberta | T2G 4X4 | N/A | 1987 | $43,565,800 | 200 | N/A | N/A | N/A |
| 65 | Stratus Electrical & Instrumentation LTD | Canada | Calgary | 5250 94 Ave Se | Alberta | T2C 3Z3 | stratusei.***** | 2014 | $43,565,800 | 200 | N/A | N/A | N/A |
| 66 | Mancon Holdings LTD | Canada | Regina | 504 Henderson Dr | Saskatchewan | S4N 5X2 | N/A | 1984 | $43,565,800 | 200 | N/A | N/A | N/A |
| 67 | Sentrex Communications INC | Canada | Toronto | 25 Milvan Dr | Ontario | M9L 1Y8 | sentrexco.***** | 2012 | $41,823,168 | 192 | N/A | N/A | N/A |
| 68 | Nortown Electrical Contractors LIMITED | Canada | Toronto | 102-3845 Bathurst St | Ontario | M3H 3N2 | nortownelectricalcontractorsassociates.***** | 1951 | $40,298,365 | 185 | N/A | N/A | N/A |
| 69 | Tarpon Construction Management LTD | Canada | Edmonton | 3944 53 Ave Nw | Alberta | T6B 3N7 | ptwenergy.***** | 2007 | $40,036,530 | 170 | N/A | N/A | N/A |
| 70 | Nortown Electrical Contractors Associates | Canada | Toronto | 102-3845 Bathurst St | Ontario | M3H 3N2 | nortownelectricalcontractorsassociates.***** | 1955 | $39,209,220 | 180 | N/A | N/A | N/A |
| 71 | Technical Integration Experts LTD | Canada | Toronto | 22 Bowring Walk | Ontario | M3H 5Z8 | tieltd.***** | 2014 | $38,120,075 | 175 | N/A | N/A | N/A |
| 72 | Long Audio Consultants LTD | Canada | Toronto | 22 Bowring Walk | Ontario | M3H 5Z8 | N/A | 1976 | $38,120,075 | 175 | N/A | N/A | N/A |
| 73 | Gardner Electric LTD | Canada | Saint John | 875 Bayside Dr | New Brunswick | E2R 1A3 | gardnerelectric.***** | 2004 | $35,506,127 | 163 | N/A | N/A | N/A |
| 74 | Emera Utility Services Incorporated | Canada | Halifax | 31 Dominion Cres | Nova Scotia | B3T 1M3 | emerautilityservices.***** | 1999 | $35,326,350 | 150 | N/A | N/A | N/A |
| 75 | Mmr Canada LIMITED | Canada | Calgary | 11083 48 St Se | Alberta | T2C 1G8 | mmrcdn.***** | 2006 | $35,326,350 | 150 | N/A | N/A | N/A |
| 76 | T. & D. Enterprises LTD | Canada | Winnipeg | 1049 Logan Ave | Manitoba | R3E 1P6 | wescan-services.***** | 1977 | $35,326,350 | 150 | N/A | N/A | N/A |
| 77 | Symtech Innovations LTD | Canada | Richmond Hill | 20 West Beaver Creek Rd | Ontario | L4B 3L6 | symtech.***** | 2005 | $35,326,350 | 150 | N/A | N/A | N/A |
| 78 | K-Line Maintenance & Construction LIMITED | Canada | Whitchurch-stouffville | 12731 Highway 48 | Ontario | L4A 4A7 | k-line.***** | 1967 | $35,326,350 | 150 | N/A | N/A | N/A |
| 79 | Benjamin Franklin Electric LIMITED | Canada | Toronto | B-179 Bartley Dr | Ontario | M4A 1E6 | N/A | 1983 | $34,852,640 | 160 | N/A | N/A | N/A |
| 80 | Dmw Electrical Instrumentation INC | Canada | Sarnia | 227 Confederation St | Ontario | N7T 1Z9 | dmwelectrical.***** | 1998 | $34,852,640 | 160 | N/A | N/A | N/A |
| 81 | Mccaine Electric LTD | Canada | Winnipeg | 106 Lowson Cres | Manitoba | R3P 2H8 | canem.***** | 1918 | $32,971,260 | 140 | N/A | N/A | N/A |
| 82 | Mellon INC | Canada | Sarnia | 1550 Confederation Line | Ontario | N7W 1A3 | melloninc.***** | 1981 | $32,674,350 | 150 | N/A | N/A | N/A |
| 83 | Spark Power Low Voltage Services INC | Canada | Oakville | 200-1337 North Service Rd E | Ontario | L6H 1A7 | sparkpowercorp.***** | 1971 | $32,674,350 | 150 | N/A | N/A | N/A |
| 84 | Tel-E Connect Systems LTD | Canada | Toronto | 7 Kodiak Cres | Ontario | M3J 3E5 | tcscanada.***** | 1981 | $32,674,350 | 150 | N/A | N/A | N/A |
| 85 | O'brien Electric CO LTD | Canada | Saint John | 79 Marsh St | New Brunswick | E2L 5R1 | N/A | 1989 | $32,674,350 | 150 | N/A | N/A | N/A |
| 86 | Kinsey Enterprises INC | Canada | Acheson | 11680 266 St | Alberta | T7X 6H2 | cdnpowerpac.***** | 1977 | $32,674,350 | 150 | N/A | N/A | N/A |
| 87 | Bridge Electric CORP | Canada | Richmond | 11091 Hammersmith Gate | British Columbia | V7A 5E6 | bridgeelectric.***** | 1982 | $30,616,170 | 130 | N/A | N/A | N/A |
| 88 | S&S/BOLTON Electric INC | Canada | Ottawa | 5411 Canotek Rd | Ontario | K1J 9M3 | ssbolton.***** | 2011 | $30,496,060 | 140 | N/A | N/A | N/A |
| 89 | Les Services Énergetiques Ecosystem INC. | Canada | Québec | 2875 Boul Laurier Bureau 950 Édifice Delta 3 | Québec | G1V 2M2 | ecosystem.***** | 2001 | $30,496,060 | 140 | N/A | N/A | 3964931 |
| 90 | Catech Systems LTD | Canada | Markham | 201 Whitehall Dr Unit 4 | Ontario | L3R 9Y3 | catech-systems.***** | 1989 | $30,380,661 | 129 | N/A | N/A | N/A |
| 91 | Amelco Electric (calgary) LTD | Canada | Calgary | 2230 22 St Ne | Alberta | T2E 8B7 | amelcoelectric.***** | 1983 | $28,317,770 | 130 | N/A | N/A | N/A |
| 92 | O'dell Electric LTD | Canada | Calgary | 3827 15a St Se | Alberta | T2G 3N7 | odellelectric.***** | 1984 | $28,317,770 | 130 | N/A | N/A | N/A |
| 93 | 766780 Alberta LTD | Canada | Calgary | 3827 15a St Se | Alberta | T2G 3N7 | odellelectric.***** | 1998 | $28,317,770 | 130 | N/A | N/A | N/A |
| 94 | Controls & Equipment LTD | Canada | Moncton | 185 Millennium Blvd | Nouveau-brunswick | E1E 2G7 | controlsequipment.***** | 1975 | $28,261,080 | 120 | N/A | N/A | N/A |
| 95 | Mid South Contractors Ulc | Canada | Windsor | 3110 Devon Dr | Ontario | N8X 4L2 | midsouthulc.***** | 1995 | $28,261,080 | 120 | N/A | N/A | N/A |
| 96 | Amec Black & Mcdonald LIMITED | Canada | Halifax | 11 Frazee Ave | Nova Scotia | B3B 1Z4 | blackandmcdonald.***** | 1990 | $27,790,062 | 118 | N/A | N/A | N/A |
| 97 | Genesis Integration INC | Canada | Edmonton | 14721 123 Ave Nw | Alberta | T5L 2Y6 | genint.***** | 1990 | $27,790,062 | 118 | N/A | N/A | N/A |
| 98 | The Cableshoppe INC | Canada | Toronto | 1410 Birchmount Rd | Ontario | M1P 2E3 | thecableshoppe.***** | 2006 | $27,228,625 | 125 | N/A | N/A | N/A |
| 99 | Lamarche Electric INC | Canada | Clarence | 9374 County Road 17 | Ontario | K4K 1K9 | lamarcheelectric.***** | 2013 | $26,139,480 | 120 | N/A | N/A | N/A |
| 100 | Allied Projects LTD | Canada | Calgary | 7017 Farrell Rd Se | Alberta | T2H 0T3 | alliedprojects.***** | 2000 | $26,139,480 | 120 | N/A | N/A | N/A |