Company lists · Data refreshed September 2026

Top 25 Autotransformers manufacturers based in the United States

Name: Autotransformers 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 30, 2026 150 companies tracked

RevenueBase identified 150 autotransformers manufacturers headquartered in the United States as of September 2026 and tracks 4,581 professional contacts across them, including 1,407 with verified work emails. Houston is the largest hub.

This list covers autotransformers 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 30, 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 30, 2026 86% judged on-target in blind review

150Companies

4,581Contacts tracked

1,407Verified emails

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The 25 largest autotransformers manufacturers based in the United States

Ranked by team size

Top 25 of 150 autotransformers manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to autotransformers 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	Howard Industries	Partial evidence	Ellisville, MS, United StatesHQ checked Sep 30, 2026	1,001-5,000	941 contacts →
	Partial evidence “Howard Industries is the leading manufacturer of liquid-filled distribution transformers for the utility and commercial/industrial markets.” Source: RevenueBase Database · checked Sep 30, 2026
2	Virginia Transformer Corp	Partial evidence	Roanoke, VA, United StatesHQ checked Sep 30, 2026	5,001-10,000	792 contacts →
	Partial evidence “Virginia Transformer is an engineering company that manufactures transformers.” Source: RevenueBase Database · checked Sep 30, 2026
3	Maddox Industrial Transformer	Indirect evidence	Greer, SC, United StatesHQ checked Sep 30, 2026	201-500	286 contacts →
	Indirect evidence “Maddox serves the commercial, industrial, utility, and renewables segments of the transformer market.” Source: RevenueBase Database · checked Sep 30, 2026
4	HD Hyundai Power Transformers Usa, INC	Partial evidence	Montgomery, AL, United StatesHQ checked Sep 30, 2026	201-500	202 contacts →
	Partial 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 30, 2026
5	Power Partners	Partial evidence	Athens, GA, United StatesHQ checked Sep 30, 2026	1,001-5,000	174 contacts →
	Partial evidence “Power Partners is a leading manufacturer of distribution transformers in North America.” Source: RevenueBase Database · checked Sep 30, 2026
6	Pennsylvania Transformer Technology LLC PTT	Partial evidence	Canonsburg, PA, United StatesHQ checked Sep 30, 2026	201-500	169 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 30, 2026
7	MGM Transformers	Indirect evidence	Vernon, CA, United StatesHQ checked Sep 30, 2026	201-500	147 contacts →
	Indirect evidence “MGM Transformers is now part of Forgent Power Solutions.” Source: RevenueBase Database · checked Sep 30, 2026
8	JST Power Equipment	Indirect evidence	Lake Mary, FL, United StatesHQ checked Sep 30, 2026	201-500	134 contacts →
	Indirect evidence “At JST Power Equipment, we pride ourselves on delivering world-class transformer and electrical equipment solutions.” Source: RevenueBase Database · checked Sep 30, 2026
9	Vantran Transformers	Indirect evidence	Waco, TX, United StatesHQ checked Sep 30, 2026	51-200	86 contacts →
	Indirect evidence “VanTran Transformers is now part of Forgent Power Solutions.” Source: RevenueBase Database · checked Sep 30, 2026
10	Fortune Electric	Partial evidence	Torrance, CA, United StatesHQ checked Sep 30, 2026	1,001-5,000	83 contacts →
	Partial evidence “Welcome to Fortune Electric, a world class power transformer and switchgear manufacturer since 1969.” Source: RevenueBase Database · checked Sep 30, 2026
11	Olsun Electrics Corporation	Indirect evidence	Richmond, IL, United StatesHQ checked Sep 30, 2026	51-200	51 contacts →
	Indirect evidence “75 Years of Engineering Excellence in the Delivered Worldwide Olsun Electrics is the industry’s most trusted partner for custom dry-type transformers.” Source: RevenueBase Database · checked Sep 30, 2026
12	Jordan Transformer LLC	Indirect evidence	Jordan, MN, United StatesHQ checked Sep 30, 2026	51-200	43 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 30, 2026
13	Meta Power Solutions	Indirect evidence	Lake Park, FL, United StatesHQ checked Sep 30, 2026	51-200	39 contacts →
	Indirect evidence “We collaborate with customers to deliver cost-effective, well-developed commercial transformer and industrial transformer solutions that meet unique specifications.” Source: RevenueBase Database · checked Sep 30, 2026
14	Instrument Transformer Equipment Corporation	Partial evidence	Monroe, NC, United StatesHQ checked Sep 30, 2026	51-200	32 contacts →
	Partial evidence “ITEC, a MacLean Power Systems (MPS) company, specializes in the design and manufacture of dry and oil-filled transformers, ensuring the safety and reliability of electrical…” Source: RevenueBase Database · checked Sep 30, 2026
15	Micron Industries Corporation	Partial evidence	Sterling, IL, United StatesHQ checked Sep 30, 2026	51-200	31 contacts →
	Partial evidence “For over 40 years, Micron has been the supplier of choice for original equipment manufacturers and control system builders around the world.” Source: RevenueBase Database · checked Sep 30, 2026
16	Sunbelt Transformer	Indirect evidence	Temple, TX, United StatesHQ checked Sep 30, 2026	51-200	31 contacts →
	Indirect evidence “Sunbelt Transformer is one of the world’s largest providers of new and reconditioned transformers and electrical equipment for commercial and industrial markets worldwide.” Source: RevenueBase Database · checked Sep 30, 2026
17	SAG Harbor Industries	Partial evidence	Sag Harbor, NY, United StatesHQ checked Sep 30, 2026	51-200	28 contacts →
	Partial evidence “Electric coil and transformer manufacturer.” Source: RevenueBase Database · checked Sep 30, 2026
18	Quality Transformer And Electronics	Partial evidence	Milpitas, CA, United StatesHQ checked Sep 30, 2026	51-200	28 contacts →
	Partial evidence “Quality Transformer and Electronics designs and manufactures custom transformers, inductors, reactors and electrictronic assemblies.” Source: RevenueBase Database · checked Sep 30, 2026
19	Jefferson Electric, A Voltaris Company	Indirect evidence	Goodyear, AZ, United StatesHQ checked Sep 30, 2026	501-1,000	28 contacts →
	Indirect evidence “Jefferson Electric delivers precision-engineered transformer solutions trusted across industrial, commercial, and utility markets.” Source: RevenueBase Database · checked Sep 30, 2026
20	Pacific Transformer	Indirect evidence	Anaheim, CA, United StatesHQ checked Sep 30, 2026	51-200	27 contacts →
	Indirect evidence “Since 1981, Pacific Transformer has remained a market leader in the field of custom transformers, magnetic engineering, and power transformer design.” Source: RevenueBase Database · checked Sep 30, 2026
21	Amran Instrument Transformers	Partial evidence	Sugar Land, TX, United StatesHQ checked Sep 30, 2026	201-500	27 contacts →
	Partial evidence “Amran Instrument Transformers is a leading manufacturer of Low Voltage and Medium Voltage Instrument Transformers (Current and Voltage Transformers) with multiple manufacturing…” Source: RevenueBase Database · checked Sep 30, 2026
22	Toroid Corporation	Indirect evidence	Salisbury, MD, United StatesHQ checked Sep 30, 2026	51-200	27 contacts →
	Indirect evidence “For over 40 years, Toroid Corporation has been a leading provider of custom-designed toroidal transformers and medical isolation transformers, proudly made in the USA.” Source: RevenueBase Database · checked Sep 30, 2026
23	Alamo Transformer	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 30, 2026	51-200	26 contacts →
	Indirect evidence “Alamo Transformer Supply Company (ATSCO) began operation in March of 1963 in San Antonio, Texas.” Source: RevenueBase Database · checked Sep 30, 2026
24	AQ Transformer Solutions INC	Indirect evidence	Wytheville, VA, United StatesHQ checked Sep 30, 2026	51-200	26 contacts →
	Indirect evidence “With nearly 40 years experience, AQ Transformer Solutions Inc.(AQTS) is the leading supplier of custom-built power magnetics components, such as transformers, reactors and filters.” Source: RevenueBase Database · checked Sep 30, 2026
25	Global Power Products	Indirect evidence	Lawrenceville, GA, United StatesHQ checked Sep 30, 2026	51-200	25 contacts →
	Indirect evidence “Established in 1995, we expanded in 2001 and are continually growing and developing to deliver accurate, user-friendly, and affordable products to meet consumer needs.” Source: RevenueBase Database · checked Sep 30, 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: autotransformers 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 autotransformers manufacturers.
Partial evidence: Its own public description names part of autotransformers manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name autotransformers 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 150 autotransformers manufacturers based in the United States

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Autotransformers manufacturers based in the United States at a glance

As of Sep 30, 2026

30.7%Verified-email coverage

30.5Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · Houston

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 150 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 autotransformers 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 “autotransformers 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 autotransformers 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 autotransformers 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, 1,407 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 30, 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.

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 autotransformers 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 autotransformers manufacturers are there based in the United States?

RevenueBase identified 150 autotransformers 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?

Howard Industries, headquartered in Ellisville, tops this list with the largest team on record.

Which city has the most autotransformers manufacturers?

Houston leads with 7 headquartered companies, followed by Anaheim (3) and Grand Haven (3).

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 1,407 verified decision-maker contacts tracked across these 150 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 30, 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.