Company lists · Data refreshed September 2026

Top 25 Industrial transformer manufacturers based in the United States

Name: Industrial transformer manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 515 companies tracked

RevenueBase identified 515 industrial transformer manufacturers headquartered in the United States as of September 2026 and tracks 39,257 professional contacts across them, including 14,833 with verified work emails. Houston is the largest hub.

This list covers industrial transformer manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

515Companies

39,257Contacts tracked

14,833Verified emails

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The 25 largest industrial transformer manufacturers based in the United States

Ranked by team size

Top 25 of 515 industrial transformer manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial transformer manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Schweitzer Engineering Laboratories SEL	Partial evidence	Pullman, WA, United StatesHQ checked Sep 17, 2026	5,001-10,000	6,489 contacts →
	Partial evidence “SEL is a globally recognized designer and manufacturer of products and solutions that make electric power safer, more reliable, and more economical.” Source: RevenueBase Database · checked Sep 17, 2026
2	Littelfuse	Partial evidence	Rosemont, IL, United StatesHQ checked Sep 17, 2026	10001+	4,259 contacts →
	Partial evidence “Littelfuse, Inc.(NASDAQ: LFUS) is a diversified, industrial technology manufacturing company shaping solutions for the safe and efficient transfer of electrical energy.” Source: RevenueBase Database · checked Sep 17, 2026
3	Hubbell Incorporated	Partial evidence	Shelton, CT, United StatesHQ checked Sep 17, 2026	10001+	4,053 contacts →
	Partial evidence “Hubbell Incorporated is a leading manufacturer of utility and electrical solutions that help build more reliable, resilient, and renewable energy infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
4	Powell	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,561 contacts →
	Indirect evidence “Powell is hiring- Powell is dedicated to improving people’s lives by providing reliable power distribution systems in every market we serve.” Source: RevenueBase Database · checked Sep 17, 2026
5	Hubbell Power Systems	Partial evidence	Columbia, SC, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,079 contacts →
	Partial evidence “Hubbell Power Systems (HPS) designs and manufactures a wide variety of electric power transmission, distribution, substation, underground, OEM, and communications products used by…” Source: RevenueBase Database · checked Sep 17, 2026
6	Industrial Electric Mfg. IEM	Strong evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	969 contacts →
	Strong evidence “Industrial Electric Mfg.(IEM) is the largest independent full-line manufacturer of electrical distribution equipment and integrated power systems in the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
7	Mitsubishi Electric Power Products, INC	Indirect evidence	Warrendale, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	967 contacts →
	Indirect evidence “Mitsubishi Electric Power Products, Inc.(MEPPI) is a leading U.S.” Source: RevenueBase Database · checked Sep 17, 2026
8	Howard Industries	Strong evidence	Ellisville, MS, United StatesHQ checked Sep 17, 2026	1,001-5,000	941 contacts →
	Strong evidence “Howard Industries is the leading manufacturer of liquid-filled distribution transformers for the utility and commercial/industrial markets.” Source: RevenueBase Database · checked Sep 17, 2026
9	Dashiell Corporation	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	940 contacts →
	Partial evidence “Dashiell is a leading national provider of technical services to the electric utility, power generation, industrial, renewable and energy industries.” Source: RevenueBase Database · checked Sep 17, 2026
10	SAE Towers	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	928 contacts →
	Indirect evidence “SAE Towers is one of the world’s largest producers of steel lattice towers for high-voltage power transmission.” Source: RevenueBase Database · checked Sep 17, 2026
11	Electrical Consultants, INC	Indirect evidence	Billings, MT, United StatesHQ checked Sep 17, 2026	1,001-5,000	890 contacts →
	Indirect evidence “Electrical Consultants, Inc.(ECI) is an employee-owned, national provider of high voltage transmission, substation, and distribution solutions.” Source: RevenueBase Database · checked Sep 17, 2026
12	Virginia Transformer Corp	Strong evidence	Roanoke, VA, United StatesHQ checked Sep 17, 2026	5,001-10,000	792 contacts →
	Strong evidence “Virginia Transformer is an engineering company that manufactures transformers.” Source: RevenueBase Database · checked Sep 17, 2026
13	Flanders	Indirect evidence	Evansville, IN, United StatesHQ checked Sep 17, 2026	501-1,000	789 contacts →
	Indirect evidence “FLANDERS, Leverage our legacy.” Source: RevenueBase Database · checked Sep 17, 2026
14	Wholesale Electric Supply Co. Of Houston, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	544 contacts →
	Indirect evidence “Wholesale Electric Supply Company of Houston, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
15	Tdk-Lambda Americas	Partial evidence	Neptune, NJ, United StatesHQ checked Sep 17, 2026	201-500	540 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
16	Ermco-Eci	Indirect evidence	Dyersburg, TN, United StatesHQ checked Sep 17, 2026	1,001-5,000	520 contacts →
	Indirect evidence “ERMCO (Electric Research and Manufacturing Cooperative, Inc.) is headquartered in Dyersburg, Tennessee.” Source: RevenueBase Database · checked Sep 17, 2026
17	Marathon Electric Motors And Generators	Indirect evidence	Wausau, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	295 contacts →
	Indirect evidence “Marathon® has a history of over 110 years of making Motors & Generators.” Source: RevenueBase Database · checked Sep 17, 2026
18	Maddox Industrial Transformer	Strong evidence	Greer, SC, United StatesHQ checked Sep 17, 2026	201-500	286 contacts →
	Strong evidence “Maddox serves the commercial, industrial, utility, and renewables segments of the transformer market.” Source: RevenueBase Database · checked Sep 17, 2026
19	Asplundh Engineering Services	Indirect evidence	Willow Grove, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	284 contacts →
	Indirect evidence “Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Source: RevenueBase Database · checked Sep 17, 2026
20	Milbank Energy At Work	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 17, 2026	501-1,000	266 contacts →
	Indirect evidence “Milbank provides the tools that empower life.” Source: RevenueBase Database · checked Sep 17, 2026
21	Systems Control	Partial evidence	Iron Mountain, MI, United StatesHQ checked Sep 17, 2026	501-1,000	240 contacts →
	Partial evidence “Systems Control, a Hubbell brand, designs and manufactures turnkey control systems and control relays that are involved in the protection and control of transmission and…” Source: RevenueBase Database · checked Sep 17, 2026
22	Electro-Mechanical	Indirect evidence	Bristol, VA, United StatesHQ checked Sep 17, 2026	501-1,000	221 contacts →
	Indirect evidence “Electro-Mechanical, LLC is a global leader in developing and manufacturing technologies used for electrical power distribution switching, power quality and power protection…” Source: RevenueBase Database · checked Sep 17, 2026
23	Intermountain Electronics	Partial evidence	Price, UT, United StatesHQ checked Sep 17, 2026	501-1,000	208 contacts →
	Partial evidence “IE provides custom-engineered, packaged equipment to industrial markets.” Source: RevenueBase Database · checked Sep 17, 2026
24	HD Hyundai Power Transformers Usa, INC	Strong evidence	Montgomery, AL, United StatesHQ checked Sep 17, 2026	201-500	202 contacts →
	Strong evidence “HD Hyundai Power Transformers USA, Inc, a subsidiary of HD Hyundai Electric Systems, stands as a premier transformer manufacturer located in Montgomery, Alabama.” Source: RevenueBase Database · checked Sep 17, 2026
25	Expanse Electrical CO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	188 contacts →
	Indirect evidence “Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: industrial transformer manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names industrial transformer manufacturers.
Partial evidence: Its own public description names part of industrial transformer manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial transformer manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 515 industrial transformer manufacturers based in the United States

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Industrial transformer manufacturers based in the United States at a glance

As of Sep 17, 2026

37.8%Verified-email coverage

76.2Average contacts per company

11-50Median size (employees)

5.6%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

151

11-50

153

51-200

109

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 515 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among industrial transformer manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “industrial transformer manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names industrial transformer manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among industrial transformer manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 14,833 across the full list. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Industrial transformer manufacturers by metro

Industrial transformer manufacturers in Houston29

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names industrial transformer manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many industrial transformer manufacturers are there based in the United States?

RevenueBase identified 515 industrial transformer manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Schweitzer Engineering Laboratories SEL, headquartered in Pullman, tops this list with the largest team on record.

Which city has the most industrial transformer manufacturers?

Houston leads with 29 headquartered companies, followed by Miami (5) and Addison (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 14,833 verified decision-maker contacts tracked across these 515 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 Smart Search, 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.