Company lists · Data refreshed November 2026

Top 25 Transformer accessory suppliers based in the United States

RevenueBase identified 386 company matches for transformer accessory suppliers associated with the United States as of November 2026 and tracks 17,561 professional contacts across them, including 5,774 with verified work emails. Houston is the largest hub.

This list covers company matches for transformer accessory suppliers 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 November 2, 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 Nov 2, 2026 How this list was built
386Companies
17,561Contacts tracked
5,774Verified emails
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The 25 largest transformer accessory suppliers based in the United States

Ranked by team size
Top 25 of 386 company matches for transformer accessory suppliers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 2, 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 matchSouthfield, MI, United StatesHQ recorded Nov 2, 202610001+2,316 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 · Nov 2, 2026 · View company records in RevenueBase
2Exact matchColumbia, SC, United StatesHQ recorded Nov 2, 20261,001-5,0001,129 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 · Nov 2, 2026 · View company records in RevenueBase
3Exact matchWarrendale, FL, United StatesHQ recorded Nov 2, 20261,001-5,0001,037 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
4Exact matchEllisville, MS, United StatesHQ recorded Nov 2, 20261,001-5,0001,023 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 · Nov 2, 2026 · View company records in RevenueBase
5Exact matchLafayette, IN, United StatesHQ recorded Nov 2, 20261,001-5,000745 contacts →

Exact match

“Kirby Risk Corporation is a multi-faceted company, dedicated to understanding and meeting our business partners' needs with innovative, effective solutions.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
6Exact matchGreer, ID, United StatesHQ recorded Nov 2, 2026201-500311 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
7Exact matchKansas City, MO, United StatesHQ recorded Nov 2, 2026501-1,000277 contacts →

Exact match

“Milbank provides the tools that empower life.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
8Exact matchTallmadge, OH, United StatesHQ recorded Nov 2, 2026201-500219 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
9Exact matchCincinnati, OH, United StatesHQ recorded Nov 2, 2026501-1,000210 contacts →

Exact match

“For over 50 years, Monti Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
10Exact matchCarrollton, GA, United StatesHQ recorded Nov 2, 2026201-500205 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
11Exact matchCanonsburg, NC, United StatesHQ recorded Nov 2, 2026201-500192 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 · Nov 2, 2026 · View company records in RevenueBase
12Exact matchFranklin Park, IL, United StatesHQ recorded Nov 2, 2026501-1,000175 contacts →

Exact match

“For over 100 years, SAI (Switchboard Apparatus, Inc.) has supplied innovative and reliable equipment for electrical power distribution.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
13Exact matchAthens, GA, United StatesHQ recorded Nov 2, 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 · Nov 2, 2026 · View company records in RevenueBase
14Exact matchSolomon, TN, United StatesHQ recorded Nov 2, 2026501-1,000165 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
15Exact matchOklahoma City, TN, United StatesHQ recorded Nov 2, 2026201-500158 contacts →

Exact match

“In 2025, Southwest Electric Co.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
16Exact matchLake Mary, FL, United StatesHQ recorded Nov 2, 2026201-500154 contacts →

Exact match

“At JST Power Equipment, we pride ourselves on delivering world-class transformer and electrical equipment solutions.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
17Exact matchDecatur, TN, United StatesHQ recorded Nov 2, 2026201-500153 contacts →

Exact match

“Storm Power Components is a responsive, right-size US manufacturer of custom copper and aluminum electrical components.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
18Exact matchMckinney, AZ, United StatesHQ recorded Nov 2, 2026201-500142 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 · Nov 2, 2026 · View company records in RevenueBase
19Exact matchIrvington, NJ, United StatesHQ recorded Nov 2, 2026201-500131 contacts →

Exact match

“Richards has proudly served the energy distribution industry since 1945, earning the respect of customers and competitors alike.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
20Exact matchVernon, CA, United StatesHQ recorded Nov 2, 2026201-500131 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
21Exact matchSioux Falls, ND, United StatesHQ recorded Nov 2, 2026201-500128 contacts →

Exact match

“Malloy has established itself as a cornerstone in the electrical and power transmission industry through its consistent growth, adaptability, and commitment to quality and…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
22Exact matchLubbock, TX, United StatesHQ recorded Nov 2, 2026201-500128 contacts →

Exact match

“Founded on April 1, 1950, Brandon and Clark, Inc.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
23Exact matchCaldwell, ID, United StatesHQ recorded Nov 2, 20261,001-5,000128 contacts →

Exact match

“Mission Critical Group (MCG) stands apart as an end-to-end power systems and solutions provider, accelerating time-to-power in mission critical environments with unmatched speed…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
24Exact matchIndianapolis, OH, United StatesHQ recorded Nov 2, 2026201-500110 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 · Nov 2, 2026 · View company records in RevenueBase
25Exact matchTorrance, PA, United StatesHQ recorded Nov 2, 20261,001-5,00097 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase

Showing 25 of 386 transformer accessory suppliers based in the United States

See the full list, filter by size, metro and specialty, and access 5,774 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Transformer accessory suppliers based in the United States at a glance

As of Nov 2, 2026
32.9%Verified-email coverage
45.5Average contacts per company
11-50Median size (employees)
4.9%Largest-city concentration · Houston
Nov 2, 2026Page data refreshed

Companies by employee count

1-10
126
11-50
140
51-200
67
201-500
23
501-1,000
13
1,001-5,000
12
5,001-10,000
2
10001+
2

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 386 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 “transformer accessory suppliers” 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 5,774 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 November 2, 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 “transformer accessory suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many transformer accessory suppliers are there based in the United States?

RevenueBase identified 386 company matches for transformer accessory suppliers associated with the United States as of November 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?

Electrical Components International tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most transformer accessory suppliers?

Houston leads with 19 company records, followed by Cincinnati (6) and Decatur (4).

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 5,774 professional contacts with verified work emails tracked across these 386 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 November 2, 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.