Company lists · Data refreshed September 2026

Top 25 Electrical transformer companies based in the United States

RevenueBase identified 616 company matches for electrical transformer companies associated with the United States as of September 2026 and tracks 47,534 professional contacts across them, including 17,129 with verified work emails. Houston is the largest hub.

This list covers company matches for electrical transformer companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built
616Companies
47,534Contacts tracked
17,129Verified emails
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The 25 largest electrical transformer companies based in the United States

Ranked by team size
Top 25 of 616 company matches for electrical transformer companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchPullman, WA, United StatesHQ recorded Sep 19, 20265,001-10,0006,489 contacts →

Exact match

“SEL is a globally recognized designer and manufacturer of products and solutions that make electric power safer, more reliable, and more economical.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchRosemont, IL, United StatesHQ recorded Sep 19, 202610001+4,259 contacts →

Exact match

“Littelfuse, Inc.(NASDAQ: LFUS) is a diversified, industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchShelton, CT, United StatesHQ recorded Sep 19, 202610001+4,053 contacts →

Exact match

“Hubbell Incorporated is a leading manufacturer of utility and electrical solutions that help build more reliable, resilient, and renewable energy infrastructure.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261,001-5,0002,561 contacts →

Exact match

“Powell is hiring- Powell is dedicated to improving people’s lives by providing reliable power distribution systems in every market we serve.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchSouthfield, MI, United StatesHQ recorded Sep 19, 202610001+2,200 contacts →

Exact match

“Founded in 1953, Electrical Components International (ECI) is one of the world’s leading suppliers of electrical distribution systems, control box assemblies, and other critical…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchHarvey, IL, United StatesHQ recorded Sep 19, 20265,001-10,0001,595 contacts →

Exact match

“Atkore is a leading manufacturer of electrical products for commercial, industrial, data center, telecommunications, and solar applications.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchColumbia, SC, United StatesHQ recorded Sep 19, 20261,001-5,0001,079 contacts →

Exact match

“Hubbell Power Systems (HPS) designs and manufactures a wide variety of electric power transmission, distribution, substation, underground, OEM, and communications products used by…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchFremont, CA, United StatesHQ recorded Sep 19, 20261,001-5,000969 contacts →

Exact match

“Industrial Electric Mfg.(IEM) is the largest independent full-line manufacturer of electrical distribution equipment and integrated power systems in the U.S.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchWarrendale, PA, United StatesHQ recorded Sep 19, 20261,001-5,000967 contacts →

Exact match

“Mitsubishi Electric Power Products, Inc.(MEPPI) is a leading U.S.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchEllisville, MS, United StatesHQ recorded Sep 19, 20261,001-5,000941 contacts →

Exact match

“Howard Industries is the leading manufacturer of liquid-filled distribution transformers for the utility and commercial/industrial markets.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261,001-5,000928 contacts →

Exact match

“SAE Towers is one of the world’s largest producers of steel lattice towers for high-voltage power transmission.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchBillings, MT, United StatesHQ recorded Sep 19, 20261,001-5,000890 contacts →

Exact match

“Electrical Consultants, Inc.(ECI) is an employee-owned, national provider of high voltage transmission, substation, and distribution solutions.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchFort Mill, SC, United StatesHQ recorded Sep 19, 20261,001-5,000858 contacts →

Exact match

“MacLean Power Systems (MPS), headquartered in Fort Mill, SC, is LEADING THE WAY™ in delivering innovative, reliable, and resilient solutions for the electric utility…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchRoanoke, VA, United StatesHQ recorded Sep 19, 20265,001-10,000792 contacts →

Exact match

“Virginia Transformer is an engineering company that manufactures transformers.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchEvansville, IN, United StatesHQ recorded Sep 19, 2026501-1,000789 contacts →

Exact match

“FLANDERS, Leverage our legacy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchRichland, MS, United StatesHQ recorded Sep 19, 2026501-1,000559 contacts →

Exact match

“Irby Construction Company, a wholly owned subsidiary of Quanta Services, Inc, excels in the processes required for major transmission, substation and distribution line…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Sep 19, 2026501-1,000544 contacts →

Exact match

“Wholesale Electric Supply Company of Houston, Inc.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchNeptune, NJ, United StatesHQ recorded Sep 19, 2026201-500540 contacts →

Exact match

“TDK-Lambda Corporation, a group company of TDK Corporation, is a recognized leader and global supplier of power conversion products for industrial and medical equipment worldwide.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchDyersburg, TN, United StatesHQ recorded Sep 19, 20261,001-5,000520 contacts →

Exact match

“ERMCO (Electric Research and Manufacturing Cooperative, Inc.) is headquartered in Dyersburg, Tennessee.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261,001-5,000511 contacts →

Exact match

“RESA Power is your ONE-STOP for all of your power needs.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchFlorham Park, NJ, United StatesHQ recorded Sep 19, 20261,001-5,000468 contacts →

Exact match

“ASCO Power Technologies has provided power reliability solutions for more than 125 years.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchNew Castle, DE, United StatesHQ recorded Sep 19, 2026201-500351 contacts →

Exact match

“Headquartered in New Castle, Delaware, with locations in Delaware, Pennsylvania, New Jersey, Maryland and Virginia, United Electric is a nationally recognized, 100% employee-owned…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchSan Leandro, CA, United StatesHQ recorded Sep 19, 2026501-1,000321 contacts →

Exact match

“Independent Electric Supply is now operating as QED (Arizona), OneSource (California) or Irby (Utilities).”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchGreer, SC, United StatesHQ recorded Sep 19, 2026201-500286 contacts →

Exact match

“Maddox serves the commercial, industrial, utility, and renewables segments of the transformer market.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchKansas City, MO, United StatesHQ recorded Sep 19, 2026501-1,000266 contacts →

Exact match

“Milbank provides the tools that empower life.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 616 electrical transformer companies based in the United States

See the full list, filter by size, metro and specialty, and access 17,129 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Electrical transformer companies based in the United States at a glance

As of Sep 19, 2026
36.0%Verified-email coverage
77.2Average contacts per company
11-50Median size (employees)
5.5%Largest-city concentration · Houston
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
182
11-50
192
51-200
123
201-500
46
501-1,000
32
1,001-5,000
26
5,001-10,000
4
10001+
10

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 616 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “electrical transformer companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 17,129 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “electrical transformer companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electrical transformer companies are there based in the United States?

RevenueBase identified 616 company matches for electrical transformer companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Schweitzer Engineering Laboratories SEL tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most electrical transformer companies?

Houston leads with 34 company records, followed by Minneapolis (6) and Addison (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 17,129 professional contacts with verified work emails tracked across these 616 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.