Company lists · Data refreshed October 2026

Top 25 Distribution transformer maintenance companies based in the United States

RevenueBase identified 181 company matches for distribution transformer maintenance companies associated with the United States as of October 2026 and tracks 6,440 professional contacts across them, including 2,197 with verified work emails. Houston is the largest hub.

This list covers company matches for distribution transformer maintenance 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 October 11, 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 Oct 11, 2026 How this list was built
181Companies
6,440Contacts tracked
2,197Verified emails
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The 25 largest distribution transformer maintenance companies based in the United States

Ranked by team size
Top 25 of 181 company matches for distribution transformer maintenance companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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 matchIrving, TX, United StatesHQ recorded Oct 11, 20261,001-5,0001,263 contacts →

Exact match

“Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2Exact matchEllisville, MS, United StatesHQ recorded Oct 11, 20261,001-5,000981 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 · Oct 11, 2026 · View company records in RevenueBase
3Exact matchLittle Falls, MN, United StatesHQ recorded Oct 11, 2026501-1,000334 contacts →

Exact match

“RMS Energy leads the industry by energizing the future through reliable power solutions, offering comprehensive installation and maintenance services on 480V to 765kV electrical…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4Exact matchGreer, SC, United StatesHQ recorded Oct 11, 2026201-500306 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5Exact matchMontgomery, AL, United StatesHQ recorded Oct 11, 2026201-500209 contacts →

Exact match

“HD Hyundai Power Transformers USA, Inc, a subsidiary of HD Hyundai Electric Systems, stands as a premier transformer manufacturer located in Montgomery, Alabama.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6Exact matchTallmadge, OH, United StatesHQ recorded Oct 11, 2026201-500200 contacts →

Exact match

“SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7Exact matchCanonsburg, PA, United StatesHQ recorded Oct 11, 2026201-500190 contacts →

Exact match

“Pennsylvania Transformer Technology LLC (PTT) is a US-owned, industry leading manufacturer of a wide range of sizes and types of power transformers for the investor-owned…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8Exact matchAthens, GA, United StatesHQ recorded Oct 11, 20261,001-5,000172 contacts →

Exact match

“Power Partners is a leading manufacturer of distribution transformers in North America.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9Exact matchSolomon, KS, United StatesHQ recorded Oct 11, 2026501-1,000163 contacts →

Exact match

“Solomon Corporation buys, sells, repairs, recycles, and disposes of transformers, regulators and reclosers.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10Exact matchOklahoma City, OK, United StatesHQ recorded Oct 11, 2026201-500151 contacts →

Exact match

“In 2025, Southwest Electric Co.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11Exact matchMckinney, TX, United StatesHQ recorded Oct 11, 2026201-500144 contacts →

Exact match

“Emerald Transformer is the premier national single-source solution for oil-filled electrical equipment with services including repair, re-manufacturing, field technical services…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12Exact matchMemphis, TN, United StatesHQ recorded Oct 11, 2026201-500130 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13Exact matchVernon, CA, United StatesHQ recorded Oct 11, 2026201-500128 contacts →

Exact match

“MGM Transformers is now part of Forgent Power Solutions.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14Exact matchIndianapolis, IN, United StatesHQ recorded Oct 11, 2026201-500107 contacts →

Exact match

“For over half a century, Horner Industrial Group has been helping to power your business with industry leading service, quality and value by providing excellence in electrical…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15Exact matchFort Worth, TX, United StatesHQ recorded Oct 11, 2026201-500106 contacts →

Exact match

“Power Line Services is now part of Primoris Services Corporation.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16Exact matchHolbrook, MA, United StatesHQ recorded Oct 11, 2026n/a93 contacts →

Exact match

“Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17Exact matchTorrance, CA, United StatesHQ recorded Oct 11, 20261,001-5,00085 contacts →

Exact match

“Welcome to Fortune Electric, a world class power transformer and switchgear manufacturer since 1969.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18Exact matchPerrysburg, OH, United StatesHQ recorded Oct 11, 202651-20073 contacts →

Exact match

“Kiemle-Hankins is a leading industrial service and repair company.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19Exact matchBaton Rouge, LA, United StatesHQ recorded Oct 11, 202651-20062 contacts →

Exact match

“We service, maintain, repair, and upgrade all manufacturers' electrical equipment, including switchgear, circuit breakers, transformers, and starters.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20Exact matchLanham, MD, United StatesHQ recorded Oct 11, 2026201-50060 contacts →

Exact match

“ABM Electrical Power Solutions, LLC is an electrical power engineering, testing, and maintenance company based out of 4390 Parliament Pl, Lanham, Maryland, United States.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21Exact matchAltamonte Springs, FL, United StatesHQ recorded Oct 11, 2026201-50055 contacts →

Exact match

“North American Substation Services (NASS) is a nationally-recognized expert specializing in transformer and substation apparatus installation, services, and repair.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22Exact matchLake Park, FL, United StatesHQ recorded Oct 11, 202651-20047 contacts →

Exact match

“We collaborate with customers to deliver cost-effective, well-developed commercial transformer and industrial transformer solutions that meet unique specifications.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23Exact matchJordan, MN, United StatesHQ recorded Oct 11, 202651-20042 contacts →

Exact match

“JORDAN TRANSFORMER's engineering and production team has 50 years of experience working for utilities and industrial customers on virtually all types of power transformers.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24Exact matchTucson, AZ, United StatesHQ recorded Oct 11, 202651-20037 contacts →

Exact match

“Switchgear Solutions, An IPS Company offers a wide variety of field, shop and engineering services for power distribution and control equipment, including manufacturing new…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25Exact matchColman, SD, United StatesHQ recorded Oct 11, 202651-20036 contacts →

Exact match

“T&R Electric Supply Company buys, sells, rents, and repairs distribution and power class transformers, along with medium and high voltage switchgear.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

Showing 25 of 181 distribution transformer maintenance companies based in the United States

See the full list, filter by size, metro and specialty, and access 2,197 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Distribution transformer maintenance companies based in the United States at a glance

As of Oct 11, 2026
34.1%Verified-email coverage
35.6Average contacts per company
11-50Median size (employees)
3.3%Largest-city concentration · Houston
Oct 11, 2026Page data refreshed

Companies by employee count

1-10
61
11-50
67
51-200
29
201-500
14
501-1,000
6
1,001-5,000
4

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 181 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 “distribution transformer maintenance 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 2,197 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 October 11, 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 “distribution transformer maintenance companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 181 company matches for distribution transformer maintenance companies associated with the United States as of October 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?

Shermco Industries tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most distribution transformer maintenance companies?

Houston leads with 6 company records, followed by Baton Rouge (3) and Canton (3).

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 2,197 professional contacts with verified work emails tracked across these 181 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 October 11, 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.