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List of National Grid subsidiaries

Verified insights into National Grid’s global corporate structure and subsidiaries.

National Grid plc is a multinational energy company headquartered in United Kingdom. Established in its current form in 1990, National Grid manages an extensive corporate network with 574 subsidiaries globally. This ownership data is part of CompanyData.com’s verified corporate hierarchy database, covering millions of companies across various industries worldwide.

Location spread of National Grid’s subsidiaries

National Grid holds 574 subsidiaries in 6 countries, with 152 subsidiaries in the United Kingdom (26.5%), 415 in the United States (72.3%), and a small presence of 1 company in the Luxembourg. This distribution highlights its strong positioning in the North American and UK energy markets, covering both transmission and distribution of electricity and gas.

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  • Global ownership data

  • Download subsidiary lists

  • Structured hierarchies

  • Contact and email data

Top Subsidiaries and Companies Owned by National Grid

Company Name Country City Address 1 Address 2 State/Province Postal Code Website Founding Year Yearly Revenue in U.S. Dollars Employees Total Business Legal Type - Description Number of Companies in Group Company Registration Number Email Phone Number UniqueID
1
National Grid USA Service Company, INC.
USA
Northport
301 Eatons Neck Rd
N/A
Suffolk
11768
nationalgridus.com
N/A
$0
563
575
N/A
*******@***.***
63*****00
0246713106
2
National Grid Services, INC
USA
Brooklyn
119 Green St
N/A
Kings
11222
nationalgridus.com
N/A
$0
1
575
N/A
******@********.***
71*****04
0942429273
3
National Grid Engineering & Survey INC.
USA
Albany
80 State St
N/A
Albany
12207
N/A
N/A
$104,179,001
0
Corporation
575
41043
*****@******.***
0230004495
4
Regal Solar 2, LLC
USA
Wilmington Manor
1209 N Orange St
N/A
New Castle
19801
N/A
2020
$0
0
Corporation
575
N/A
************@****.***
0230007626
5
National Grid USA
USA
Waltham
40 Sylvan Rd
N/A
Middlesex
02451
nationalgridus.com
1999
$13,441,056,584
18100
Corporation
575
0190691
***********@****.***
78*****00
0941049076
6
National Grid Insurance Company
USA
Northborough
55 Bearfoot Rd
N/A
Worcester
01532
nationalgridus.com
2009
$2,164,113
2196
575
N/A
***********@***.***
50*****00
0941553645
7
The Brooklyn Union Gas Company
USA
Brooklyn
1 Metrotech Ctr Fl 1
N/A
Kings
11201
nationalgrid.com
2001
$1,465,860,000
500
Corporation
575
26532
********@******.***
71*****00
0118089906
8
Burley Solar, LLC
USA
Bloomington
8414 Normandale Lake Blvd Ste 1200
N/A
Hennepin
55437
N/A
2024
$4,060,438
250
Corporation
575
5053689
*****@******.***
65*****19
0230484798
9
National Grid USA Service Company, INC.
USA
Jamaica
8967 162nd St
N/A
Queens
11432
nationalgridus.com
N/A
$0
225
575
N/A
**********@****.***
80*****23
0196201256
10
Niagara Mohawk Power CORPORATION
USA
Liverpool
7437 Henry Clay Blvd
N/A
Onondaga
13088
N/A
N/A
$0
188
575
N/A
******@*****.***
0246742681
11
Boston Gas Company
USA
Boston
N/A
N/A
Suffolk
02205
N/A
N/A
$0
157
575
N/A
*******@******.***
0918907192
12
National Grid USA Service Company, INC.
USA
Riverhead
117 Doctors Path
N/A
Suffolk
11901
nationalgridus.com
N/A
$0
150
575
N/A
*****@*******.***
63*****02
0263594657
13
National Grid USA Service Company, INC.
USA
Brooklyn
1 Metrotech Ctr
N/A
Kings
11201
nationalgridus.com
N/A
$0
150
575
N/A
********@*******.***
71*****00
01074912090
14
National Grid Renewables, LLC
USA
Minneapolis
8400 Normandale Lake Blvd Ste 1200
N/A
Hennepin
55437
geronimoenergy.com
2019
$75,572,996
135
Corporation
575
7120622
*********@*****.***
95*****00
0228195379
15
Essex Gas Company
USA
Waltham
40 Sylvan Rd
N/A
Middlesex
02451
keyspanenergydelivery.com
2006
$11,696,208
124
Corporation
575
041427020
***********@*****.***
78*****00
0118065667
16
National Grid USA Service Company, INC.
USA
Buffalo
93 Dewey Ave
N/A
Erie
14214
nationalgridus.com
N/A
$0
113
575
N/A
***********@*******.***
80*****72
0153230840
17
National Grid USA Service Company, INC.
USA
Woburn
N/A
N/A
Middlesex
01888
N/A
N/A
$0
113
575
N/A
***********@*****.***
0907058323
18
National Grid USA Service Company, INC.
USA
Ocean Beach
Ocean Breeze Walk
N/A
Suffolk
11770
N/A
N/A
$0
113
575
N/A
*****@*****.***
0298320353
19
National Grid USA Service Company, INC.
USA
Houston
1500 Old Spanish Trl
N/A
Harris
77054
nationalgrid.com
N/A
$0
113
575
N/A
**********@********.***
71*****15
0171536231
20
National Grid North East Ventures, INC.
USA
Brooklyn
1 Metrotech Ctr
N/A
Kings
11201
nationalgrid.com
2009
$782,089
100
575
N/A
********@*******.***
71*****00
0941520719
21
Niagara Mohawk Power CORPORATION
USA
Warrensburg
3690 Main St
N/A
Warren
12885
us.ngrid.com
N/A
$0
96
575
N/A
*****@*******.***
01069024078
22
National Grid Igts CORP.
USA
Hicksville
175 E Old Country Rd
N/A
Nassau
11801
nationalgridus.com
1981
$7,286,210
89
Corporation
575
707941
********@*****.***
63*****00
0920494114
23
Massachusetts Electric Company
USA
La Verne
1925 Wright Ave Ste C
N/A
Los Angeles
91750
kiewit.com
N/A
$0
59
575
N/A
********@********.***
90*****01
0948517354
24
Ngem Energy LLC
USA
Queens Village
9530 225th St
N/A
Queens
11429
N/A
1981
$13,600,814
45
Corporation
575
910561
*******@*******.***
71*****87
0942813320
25
Gridamerica Holdings INC.
USA
Cleveland
127 Public Sq Ste 5000
N/A
Cuyahoga
44114
gridamericallc.com
2009
$737,192
35
575
N/A
*********@*******.***
21*****00
0941521230
26
Niagara Mohawk Power CORPORATION
USA
Baldwinsville
500 Henchdale
N/A
Onondaga
13027
N/A
N/A
$0
23
575
N/A
**********@****.***
31*****63
0150035493

Companies by Employee Size

  • 0 or Unknown 264
  • 1 to 100 218
  • 101 to 499 75
  • 500 to 999 6
  • 1.000 to 4.999 10
  • 5.000 to 9.999 1

Companies by Revenue Size (in USD)

  • 0 or Unknown 410
  • 100.001 to 499.999 33
  • 500.000 to 999.999 17
  • 1.000.000 to 4.999.999 56
  • 5.000.000 to 9.999.999 11
  • 10.000.000 to 49.999.999 12
  • 50.000.000 to 99.999.999 5
  • 100.000.000 to 499.999.999 15
  • 500.000.000 to 999.999.999 3
  • 1.000.000.000 or more 12
Download Data

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Discover National Grid's Global Corporate Structure

National Grid’s ownership map is part of our extensive company ownership database, which includes detailed corporate hierarchies across 200 countries and jurisdictions. This shows how the parent company connects to its subsidiaries and affiliates with verified data on global business groups. See how our dataset functions and request a personalized sample.

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National Grid Company Facts

Where is National Grid headquartered?

National Grid is headquartered in London, United Kingdom.

How many subsidiaries does National Grid have?

National Grid owns 574 subsidiaries across 6 countries.

Who owns National Grid?

National Grid plc is publicly traded with no single majority shareholder.

Is National Grid a UK company?

Yes, National Grid plc is incorporated in the UK (company no. 0331397083).

How many people work for National Grid?

National Grid employs approximately 20,000 people worldwide.

Corporate family tree

Why Ownership Structure Data Matters

Understanding ownership is important to see how companies connect and function. Our corporate hierarchy data helps you follow relationships between parent companies, subsidiaries, and shareholders, showing control, structure, and risks within any global group. Whether you’re reviewing National Grid or another multinational, this insight supports compliance verification, market studies, and better CRM data organization. With verified ownership records of over 380 million companies worldwide, CompanyData.com offers a clear picture of who controls whom across industries and countries.

How We Map Global, National, and Local Headquarters

At CompanyData.com, every company profile – like National Grid – is mapped using our three-tier hierarchy system: Global, National, and Local headquarters. This method shows how each entity fits into its broader corporate group.

Our Three Levels Explained

  • Global Headquarters — National Grid plc acts as the global headquarters for the National Grid group, with its main office based in London, United Kingdom. It oversees all other companies in the group.
  • National Headquarters — Country-level entities manage business operations locally and report to the global parent. Examples include National Grid USA, National Grid UK, and National Grid [Country] subsidiaries.
  • Local Headquarters — Regional branches handle operational sites, customer services, and regulatory compliance within their specific markets.

Each entity has a unique ID, allowing you to link subsidiaries to parent firms, trace ownership, and integrate data into your systems.

How Ownership and Control Are Shown

Control is based on ownership percentage. When a company owns more than 50% of another, we classify it as a controlled subsidiary. Our data focuses on these majority-owned relationships to clearly map corporate hierarchies. This system gives a transparent view of complex ownership networks like National Grid’s and can be applied to any global group.

Why This Is Important

This model helps identify actual decision-makers in the National Grid group, simplifies compliance checks, and supports mergers and acquisitions or risk assessments. By mapping each company with confirmed ownership data, CompanyData.com lets you explore National Grid’s corporate structure easily and understand how global companies organize themselves. With over 41 million companies linked across 200 countries and jurisdictions, our database delivers clarity and transparency to teams working with global corporate networks.

 

National Grid

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National Grid ownership & subsidiary data – FAQs

You can access National Grid company data through API, bulk files, or the Bold Platform. We create custom datasets based on your target countries, industries, and company profiles. After you share your criteria, our experts prepare a tailored dataset and send a free quote with record counts and sample data within 24 hours. Once approved, we deliver your data quickly in your preferred format — via Excel, API, bulk file, or directly in the Bold Platform.

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The price of our National Grid company data varies based on your chosen details and delivery method. Whether you need a list of subsidiaries or a full dataset via API or bulk files, we offer flexible pricing to suit your needs. You can request a free quote and record count within 24 hours — our team will provide transparent pricing and a free sample of 10 company contacts. At CompanyData.com, you only pay for the verified global data you need.

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At CompanyData.com, you can access detailed, verified data on National Grid plc and all its subsidiaries, updated daily. This includes company names, registration details, locations, industry classifications, financial indicators, and key contacts. National Grid has a revenue of $20.77 billion and a global corporate structure including subsidiaries mainly in the United Kingdom, the United States, the Cayman Islands, Luxemburg, and Malta. You can download the data via the Bold Platform, API, or bulk file delivery. Our database offers 100% worldwide company coverage, ensuring complete and accurate insights.

At CompanyData.com, our data comes from verified global business sources to ensure accuracy and full coverage. We combine official registers, financial filings, LEI records, trusted partners, and verified company websites. All data is cross-checked and validated by our experts, ensuring it’s accurate, up-to-date, and GDPR-compliant.

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