| 1 |
Longstaff And Shaw (heating) LIMITED
|
Unitedkingdom
|
Croydon
|
602 Purley Way
|
N/A
|
London
|
CR0 4RF
|
N/A
|
1968
|
$2,676,912,418
|
69
|
Corporation
|
N/A
|
00926623
|
************@*****.***
|
|
0327915801
|
| 2 |
Scotia Gas Networks LIMITED
|
Unitedkingdom
|
Horley
|
St Lawrence House
|
Station Road
|
Surrey
|
RH6 9HJ
|
sgn.*****
|
2003
|
$1,603,494,986
|
4865
|
Corporation
|
30
|
04958135
|
**********@****.***
|
+4*****20
|
0848104873
|
| 3 |
Northern Gas Networks LIMITED
|
Unitedkingdom
|
Pendas Fields
|
1100 Century Way
|
Thorpe Park, Colton
|
Leeds, West Yorkshire
|
LS15 8TU
|
northerngasnetworks.*****
|
2004
|
$662,358,796
|
1589
|
Corporation
|
5
|
05167070
|
*******@******.***
|
+4*****00
|
0850247462
|
| 4 |
Ovo (s) Gas LIMITED
|
Unitedkingdom
|
Bristol
|
Temple Quay
|
1 the Square
|
City of Bristol
|
BS1 6DG
|
N/A
|
1992
|
$615,240,316
|
353
|
Corporation
|
21
|
02716495
|
************@*******.***
|
+4*****03
|
0456329287
|
| 5 |
The Bss Group LIMITED
|
Unitedkingdom
|
King'S Heath
|
Lodge Way House
|
Lodge Way,harlestone Road
|
Northamptonshire
|
NN5 7UG
|
bssindustrial.*****
|
1899
|
$582,499,879
|
1206
|
Corporation
|
1138
|
00060987
|
*****@****.***
|
+4*****22
|
0329283653
|
| 6 |
Cbre Gws LIMITED
|
Unitedkingdom
|
Rotherhithe
|
61 Southwark Street
|
N/A
|
London
|
SE1 0HL
|
cbre.*****
|
1960
|
$556,492,115
|
1950
|
Corporation
|
2455
|
00661449
|
**********@*******.***
|
+4*****00
|
0327828417
|
| 7 |
Scotland Gas Networks PLC
|
Unitedkingdom
|
Newbridge
|
Axis House
|
5 Lonehead Drive
|
North Yorkshire
|
EH28 8TG
|
sgn.*****
|
2004
|
$488,284,210
|
151
|
Corporation
|
30
|
SC264065
|
**********@****.***
|
+4*****00
|
0849109559
|
| 8 |
British Gas New Heating LIMITED
|
Unitedkingdom
|
Stockport
|
Newbridge Lane
|
N/A
|
Manchester, Greater Manchester
|
SK1 2GT
|
britishgas.*****
|
2008
|
$437,043,511
|
1771
|
Corporation
|
239
|
06723244
|
*****@****.***
|
+4*****88
|
0322513959
|
| 9 |
Ui Central Holdings LIMITED
|
Unitedkingdom
|
Wright'S Green
|
Building 4 Clearwater
|
Lingley Green Avenue
|
Warrington
|
WA5 3UZ
|
unitedliving.*****
|
2004
|
$387,269,222
|
783
|
Corporation
|
44
|
05114630
|
************@*******.***
|
+4*****22
|
0849708756
|
| 10 |
Homeserve Membership LIMITED
|
Unitedkingdom
|
Shelfield
|
Cable Drive
|
N/A
|
Walsall, West Midlands
|
WS2 7BN
|
homeserve.*****
|
1992
|
$365,442,296
|
1885
|
Corporation
|
194
|
02770612
|
******@*****.***
|
+4*****00
|
0457565519
|
| 11 |
Bouygues E&S Contracting UK LIMITED
|
Unitedkingdom
|
Motherwell
|
Excel House
|
1 Renshaw Place, Holytown
|
North Lanarkshire
|
ML1 4UF
|
bouygues-es.*****
|
1984
|
$264,292,831
|
492
|
Corporation
|
4395
|
SC087174
|
**********@********.***
|
+4*****00
|
0399391138
|
| 12 |
Vaillant Industrial UK LIMITED
|
Unitedkingdom
|
Belper
|
Vaillant Group
|
Nottingham Road
|
Derbyshire
|
DE56 1JT
|
vaillant.*****
|
1972
|
$258,475,289
|
214
|
Corporation
|
238
|
01064184
|
***********@***.***
|
+4*****22
|
0328518299
|
| 13 |
Conex Universal LIMITED
|
Unitedkingdom
|
Kingswinford
|
Building 95
|
Second Avenue, Pensnett Trading Estate
|
Dudley, West Midlands
|
DY6 7FT
|
conexbanninger.*****
|
2011
|
$228,004,122
|
81
|
Corporation
|
15
|
07563347
|
***********@******.***
|
+4*****31
|
0328288750
|
| 14 |
B.H.C. LIMITED
|
Unitedkingdom
|
Lanark
|
Medwyn Park
|
Edinburgh Road, Carnwath
|
South Lanarkshire
|
ML11 8HS
|
bhc.*****
|
1995
|
$176,664,202
|
432
|
Corporation
|
2
|
NI029649
|
*****@********.***
|
+4*****06
|
0341489957
|
| 15 |
Liberty Group Investments LIMITED
|
Unitedkingdom
|
Cronton
|
Garden Works
|
Charleywood Road, Knowsley Industrial Park
|
Knowsley, Merseyside
|
L33 7SG
|
libertygasgroup.*****
|
1969
|
$139,984,212
|
1226
|
Corporation
|
120
|
00968396
|
*******@****.***
|
+4*****10
|
0324109690
|
| 16 |
Stelrad LIMITED
|
Unitedkingdom
|
Swinton
|
Stelrad House, Marriott Road
|
Mexborough
|
Rotherham, South Yorkshire
|
S64 8BN
|
stelrad.*****
|
1936
|
$137,243,056
|
194
|
Corporation
|
19
|
02263368
|
**********@***.***
|
+4*****50
|
0510743227
|
| 17 |
Carrier Solutions UK LTD.
|
Unitedkingdom
|
Barne Barton
|
Belliver Industrial Estate
|
Porsham Close, Roborough
|
Plymouth
|
PL6 7DB
|
toshiba-aircon.*****
|
1999
|
$136,466,056
|
505
|
Corporation
|
1320
|
03723803
|
********@****.***
|
+4*****00
|
0348403470
|
| 18 |
Borley Engineering Services LIMITED
|
Unitedkingdom
|
Tremorfa
|
Alexandra Gate
|
Ffordd Pengam
|
Cardiff
|
CF24 2SA
|
cmbengineering.*****
|
1992
|
$135,530,995
|
336
|
Corporation
|
5
|
02745902
|
*********@***.***
|
+4*****34
|
0457155799
|
| 19 |
Sureserve Compliance Central LIMITED
|
Unitedkingdom
|
Paddington
|
13 Norfolk Place
|
N/A
|
London
|
W2 1QJ
|
N/A
|
1994
|
$109,837,370
|
622
|
Corporation
|
39
|
03193203
|
********@********.***
|
+4*****75
|
0569576212
|
| 20 |
Purmo Group (UK) LTD
|
Unitedkingdom
|
Lamesley
|
Eastern Avenue
|
Team Valley Trading Estate
|
Gateshead, Tyne and Wear
|
NE11 0PG
|
myson.*****
|
1960
|
$101,851,190
|
344
|
Corporation
|
10
|
00653648
|
********@*******.***
|
+4*****66
|
0327339548
|
| 21 |
Quooker UK LTD
|
Unitedkingdom
|
Millennium Quarter
|
Beaumont Building
|
Great Ducie Street
|
Manchester, Greater Manchester
|
M3 1PQ
|
quooker.*****
|
2004
|
$100,537,484
|
117
|
Corporation
|
23
|
05287043
|
*****@****.***
|
+4*****55
|
0830161990
|
| 22 |
British Gas Social Housing LIMITED
|
Unitedkingdom
|
Windsor
|
Millstream
|
Maidenhead Road
|
Windsor and Maidenhead
|
SL4 5GD
|
britishgas.*****
|
1963
|
$98,476,073
|
472
|
Corporation
|
239
|
01026007
|
************@*****.***
|
+4*****11
|
0880275512
|
| 23 |
Sutton And East Surrey Water Services LIMITED
|
Unitedkingdom
|
Redhill
|
66-74 London Road
|
N/A
|
Surrey
|
RH1 1LJ
|
h2oservices.*****
|
1989
|
$87,223,240
|
376
|
Corporation
|
55
|
02446416
|
******@********.***
|
+4*****19
|
0615785255
|
| 24 |
Sungrow Power UK LIMITED
|
Unitedkingdom
|
Milton Keynes
|
Unit 2 Moorgate House
|
201 Silbury Boulevard
|
Milton Keynes
|
MK9 1JL
|
N/A
|
2014
|
$86,406,109
|
39
|
Corporation
|
690
|
09272760
|
************@*****.***
|
+4*****00
|
0331549464
|
| 25 |
Sureserve Compliance South LIMITED
|
Unitedkingdom
|
Paddington
|
13 Norfolk Place
|
N/A
|
London
|
W2 1QJ
|
N/A
|
2004
|
$85,365,090
|
482
|
Corporation
|
39
|
05158607
|
********@********.***
|
+4*****00
|
0850160566
|
| 26 |
Ics Cool Energy LIMITED
|
Unitedkingdom
|
Testwood
|
Calmore Industrial Estate
|
Stephenson Way, Hedge End
|
Hampshire
|
SO40 3SA
|
icscoolenergy.*****
|
2005
|
$79,876,643
|
337
|
Corporation
|
972
|
05509182
|
*******@***.***
|
+4*****61
|
0458160652
|
| 27 |
Liberty Gas Group LIMITED
|
Unitedkingdom
|
Cronton
|
Charleywood Road
|
Knowsley Industrial Park
|
Knowsley, Merseyside
|
L33 7SG
|
liberty-group.*****
|
2001
|
$79,167,144
|
689
|
Corporation
|
120
|
04242416
|
********@****.***
|
+4*****10
|
0333355377
|
| 28 |
Bgis Global Integrated Solutions LIMITED
|
Unitedkingdom
|
London
|
Suite 1 7th Floor
|
50 Broadway
|
London
|
SW1H 0BL
|
N/A
|
1989
|
$75,572,213
|
352
|
Corporation
|
5
|
02379290
|
*******@*****.***
|
+4*****86
|
0614754532
|
| 29 |
Cubicworks LTD
|
Unitedkingdom
|
Salford
|
2nd Floor Spinnaker Court
|
31 Broadway
|
Manchester, Greater Manchester
|
M50 2YR
|
N/A
|
2019
|
$74,424,736
|
234
|
Corporation
|
2
|
12154582
|
**********@******.***
|
+4*****38
|
0336396020
|
| 30 |
T Brown Group LIMITED
|
Unitedkingdom
|
Leatherhead
|
Leith House
|
Station Road
|
Surrey
|
KT22 7AB
|
tbrown.*****
|
1971
|
$70,402,999
|
382
|
Corporation
|
8
|
01006630
|
************@***.***
|
+4*****00
|
0328346864
|
| 31 |
Sureserve Compliance Northwest LIMITED
|
Unitedkingdom
|
Garston
|
Unit 16
|
The Matchworks, Speke Road, Garston
|
Liverpool, Merseyside
|
L19 2RF
|
suregroup.*****
|
2000
|
$64,878,911
|
477
|
Corporation
|
39
|
04072464
|
*******@********.***
|
+4*****00
|
0331821059
|
| 32 |
The James Mercer Group LIMITED
|
Unitedkingdom
|
Larches
|
Tulketh Hall Works
|
Hesketh Street, Ashton-on-ribble
|
Lancashire
|
PR2 2RB
|
jamesmercergroup.*****
|
2000
|
$59,752,221
|
241
|
Corporation
|
5
|
03917286
|
*******@****.***
|
+4*****00
|
0350384518
|
| 33 |
G & A Barnie Group LIMITED
|
Unitedkingdom
|
Inverness
|
16 Carsegate Road South Carsegate Industrial Estate
|
N/A
|
Highland
|
IV3 8LL
|
gabarnie.*****
|
2004
|
$59,273,258
|
386
|
Corporation
|
5
|
SC265415
|
**********@****.***
|
+4*****26
|
0849375745
|
| 34 |
Swale Heating LIMITED
|
Unitedkingdom
|
Sittingbourne
|
Eurolink Industrial Estate Heard Way
|
N/A
|
Kent
|
ME10 3SA
|
swaleheating.*****
|
1972
|
$57,171,859
|
356
|
Corporation
|
39
|
01076034
|
*****@********.***
|
+4*****88
|
0328334350
|
| 35 |
Volution Ventilation Group LIMITED
|
Unitedkingdom
|
Crawley
|
Fleming Way
|
N/A
|
West Sussex
|
RH10 9YX
|
vent-axia.*****
|
1933
|
$56,286,314
|
29
|
Corporation
|
65
|
04569321
|
*******@*******.***
|
+4*****90
|
0844066504
|
| 36 |
Phs Home Solutions LIMITED
|
Unitedkingdom
|
Houghton-le-spring
|
The Venter Building
|
3 Mandarin Road Rainton Bridge Business Park
|
Sunderland, Tyne and Wear
|
DH4 5RA
|
pacificagroup.*****
|
2010
|
$54,397,538
|
213
|
Corporation
|
196
|
04966472
|
**********@*******.***
|
+4*****74
|
0848189106
|
| 37 |
Robert Heath Heating LIMITED
|
Unitedkingdom
|
Aberystwyth
|
Unit 10c
|
Cefn Llan Science Park
|
Ceredigion
|
SY23 3AH
|
robertheath.*****
|
1983
|
$54,032,077
|
284
|
Corporation
|
1357
|
01773699
|
******@****.***
|
+4*****00
|
0400909451
|
| 38 |
Mechanical Services LIMITED
|
Unitedkingdom
|
Croydon
|
Merlin House
|
606 Purley Way
|
London
|
CR0 4RF
|
hamechanicalservices.*****
|
1985
|
$53,189,491
|
142
|
Corporation
|
2
|
01894014
|
************@********.***
|
+4*****82
|
0406375919
|
| 39 |
Pimlico Plumbers LIMITED
|
Unitedkingdom
|
Herne Hill
|
Pimlico House
|
1 Sail Street
|
London
|
SE11 6NQ
|
pimlicoplumbers.*****
|
1979
|
$53,109,987
|
142
|
Corporation
|
143
|
02012715
|
*******@******.***
|
+4*****88
|
0339541084
|
| 40 |
Forefront Utilities LIMITED
|
Unitedkingdom
|
Navestock
|
Jenkins Farm
|
Murthering Lane, Navestock
|
Essex
|
RM4 1HL
|
forefrontutilities.*****
|
1989
|
$52,725,938
|
94
|
Corporation
|
5
|
03214416
|
***********@*****.***
|
+4*****40
|
0569831509
|
| 41 |
Morrow Contracts LIMITED
|
Unitedkingdom
|
Gortgrib
|
37 Rocky Road
|
N/A
|
Belfast
|
BT5 7TA
|
morrowgroup.*****
|
1975
|
$51,501,300
|
172
|
Corporation
|
4
|
NI027386
|
*******@****.***
|
+4*****98
|
0341553352
|
| 42 |
Vaughan Engineering LIMITED
|
Unitedkingdom
|
Hebburn
|
14 Blue Sky Way Monkton Business Park South
|
Monkton Business Park South
|
South Tyneside, Tyne and Wear
|
NE31 2EQ
|
vaughan-group.*****
|
1972
|
$47,601,863
|
214
|
Corporation
|
11
|
SC050679
|
******@********.***
|
+4*****77
|
0326851675
|
| 43 |
Colt International LIMITED
|
Unitedkingdom
|
Weston
|
Colt House Ridgeway Office Park
|
Bedford Road
|
Hampshire
|
GU32 3QF
|
coltinfo.*****
|
1931
|
$47,582,886
|
279
|
Corporation
|
581
|
01222993
|
******@******.***
|
+4*****11
|
0328433613
|
| 44 |
James Frew LIMITED
|
Unitedkingdom
|
Stevenston
|
83 New Street
|
N/A
|
North Ayrshire
|
KA20 3HD
|
gassure.*****
|
1961
|
$45,803,876
|
399
|
Corporation
|
2
|
SC036286
|
*****@******.***
|
+4*****13
|
0325597520
|
| 45 |
Woodford Heating & Energy LIMITED
|
Unitedkingdom
|
Loughton
|
Oakwood House
|
Oakwood Hill Industrial Estate Oakwood Hill
|
Essex
|
IG10 3TZ
|
woodfordheating.*****
|
1994
|
$44,634,772
|
114
|
Corporation
|
3
|
02868418
|
*******@******.***
|
+4*****04
|
0681326669
|
| 46 |
Taylor & Fraser LIMITED
|
Unitedkingdom
|
Howwood
|
117 Abercorn Street
|
N/A
|
Renfrewshire
|
PA3 4DH
|
taylorandfraser.*****
|
1906
|
$44,092,219
|
255
|
Corporation
|
18
|
SC155035
|
**********@*****.***
|
+4*****51
|
0887203227
|
| 47 |
Intoheat (holdings) LIMITED
|
Unitedkingdom
|
Rudgeway
|
Units 6/7 Short Way
|
Thornbury
|
South Gloucestershire
|
BS35 3UT
|
intoheat.*****
|
2012
|
$42,324,036
|
112
|
Corporation
|
3
|
08303573
|
*******@****.***
|
+4*****40
|
0329817088
|
| 48 |
Mala Engineering LIMITED
|
Unitedkingdom
|
Clapton
|
9 Hewett Street
|
N/A
|
London
|
EC2A 3NN
|
mala.*****
|
1971
|
$42,145,561
|
100
|
Corporation
|
N/A
|
01004648
|
*********@***.***
|
+4*****00
|
0322724348
|
| 49 |
Atlantic Plastics LIMITED
|
Unitedkingdom
|
Bridgend
|
Coytrahene Close
|
Brackla Industrial Estate
|
Bridgend
|
CF31 2AX
|
talis-uk.*****
|
1970
|
$40,838,751
|
190
|
Corporation
|
188
|
01154347
|
*******@******.***
|
+4*****38
|
0328303313
|
| 50 |
E Plan Energy LIMITED
|
Unitedkingdom
|
Shifnal
|
Unit C1
|
Long Lane Cosford Business Park, Neachley
|
Shropshire
|
TF11 8PJ
|
eplanenergy.*****
|
2013
|
$40,712,541
|
124
|
Corporation
|
2
|
08594105
|
*******@****.***
|
+4*****18
|
0330618404
|