Company lists · Data refreshed September 2026

Top 25 Electrical transmission equipment suppliers based in the United States

Name: Electrical transmission equipment suppliers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 600 companies tracked

RevenueBase identified 600 electrical transmission equipment suppliers headquartered in the United States as of September 2026 and tracks 35,526 professional contacts across them, including 12,748 with verified work emails. Houston is the largest hub.

This list covers electrical transmission equipment suppliers 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 19, 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 19, 2026 86% judged on-target in blind review

600Companies

35,526Contacts tracked

12,748Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest electrical transmission equipment suppliers based in the United States

Ranked by team size

Top 25 of 600 electrical transmission equipment suppliers based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electrical transmission equipment suppliers: 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 19, 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 19, 2026
2	Littelfuse	Partial evidence	Rosemont, IL, United StatesHQ checked Sep 19, 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 19, 2026
3	Powell	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 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 19, 2026
4	Hubbell Power Systems	Strong evidence	Columbia, SC, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,079 contacts →
	Strong 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 19, 2026
5	Industrial Electric Mfg. IEM	Strong evidence	Fremont, CA, United StatesHQ checked Sep 19, 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 19, 2026
6	Mitsubishi Electric Power Products, INC	Partial evidence	Warrendale, PA, United StatesHQ checked Sep 19, 2026	1,001-5,000	967 contacts →
	Partial evidence “Mitsubishi Electric Power Products, Inc.(MEPPI) is a leading U.S.” Source: RevenueBase Database · checked Sep 19, 2026
7	Howard Industries	Indirect evidence	Ellisville, MS, United StatesHQ checked Sep 19, 2026	1,001-5,000	941 contacts →
	Indirect evidence “Howard Industries is the leading manufacturer of liquid-filled distribution transformers for the utility and commercial/industrial markets.” Source: RevenueBase Database · checked Sep 19, 2026
8	SAE Towers	Partial evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	928 contacts →
	Partial 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 19, 2026
9	Electrical Consultants, INC	Strong evidence	Billings, MT, United StatesHQ checked Sep 19, 2026	1,001-5,000	890 contacts →
	Strong evidence “Electrical Consultants, Inc.(ECI) is an employee-owned, national provider of high voltage transmission, substation, and distribution solutions.” Source: RevenueBase Database · checked Sep 19, 2026
10	Maclean Power Systems	Partial evidence	Fort Mill, SC, United StatesHQ checked Sep 19, 2026	1,001-5,000	858 contacts →
	Partial evidence “MacLean Power Systems (MPS), headquartered in Fort Mill, SC, is LEADING THE WAY™ in delivering innovative, reliable, and resilient solutions for the electric utility…” Source: RevenueBase Database · checked Sep 19, 2026
11	Summit Electric Supply	Strong evidence	Albuquerque, NM, United StatesHQ checked Sep 19, 2026	501-1,000	559 contacts →
	Strong evidence “Summit Electric Supply is an independent, privately held wholesale distributor of industrial electrical equipment and supplies ranging from basic commodities to sophisticated…” Source: RevenueBase Database · checked Sep 19, 2026
12	NEW River Electrical Corporation	Partial evidence	Roanoke, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	342 contacts →
	Partial evidence “New River Electrical Corporation (NRE) is one of the nation's leading employee-owned providers of electrical infrastructure construction and maintenance services, helping…” Source: RevenueBase Database · checked Sep 19, 2026
13	CTC Global	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 19, 2026	201-500	304 contacts →
	Indirect evidence “Founded in 2003, CTC Global is the industry leader in composite core technology, specializing in providing innovative power grid solutions for utility companies.” Source: RevenueBase Database · checked Sep 19, 2026
14	RMS Energy Co, LLC	Partial evidence	Little Falls, MN, United StatesHQ checked Sep 19, 2026	501-1,000	288 contacts →
	Partial evidence “RMS Energy leads the industry by energizing the future through reliable power solutions, offering comprehensive installation and maintenance services on 480V to 765kV electrical…” Source: RevenueBase Database · checked Sep 19, 2026
15	Maddox Industrial Transformer	Indirect evidence	Greer, SC, United StatesHQ checked Sep 19, 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 19, 2026
16	Great Southwestern Construction, INC	Indirect evidence	Castle Rock, United StatesHQ checked Sep 19, 2026	1,001-5,000	286 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	Milbank Energy At Work	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 19, 2026	501-1,000	266 contacts →
	Indirect evidence “Milbank provides the tools that empower life.” Source: RevenueBase Database · checked Sep 19, 2026
18	Crown Technical Systems	Indirect evidence	Fontana, CA, United StatesHQ checked Sep 19, 2026	201-500	241 contacts →
	Indirect evidence “Crown Technical Systems, a Flex company, is headquartered in Fontana, California, with additional production and engineering facilities in Dallas, Texas, and Ontario, Canada.” Source: RevenueBase Database · checked Sep 19, 2026
19	Systems Control	Partial evidence	Iron Mountain, MI, United StatesHQ checked Sep 19, 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 19, 2026
20	Electro-Mechanical	Partial evidence	Bristol, VA, United StatesHQ checked Sep 19, 2026	501-1,000	221 contacts →
	Partial 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 19, 2026
21	Aubrey Silvey Enterprises, INC	Indirect evidence	Carrollton, GA, United StatesHQ checked Sep 19, 2026	201-500	192 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	The Durham Company	Partial evidence	Lebanon, MO, United StatesHQ checked Sep 19, 2026	501-1,000	187 contacts →
	Partial evidence “The Durham Company specializes in the Design, Manufacturing, and Sales of products in the Electrical Utility Marketplace.” Source: RevenueBase Database · checked Sep 19, 2026
23	Brink Constructors, INC	Indirect evidence	Rapid City, SD, United StatesHQ checked Sep 19, 2026	501-1,000	182 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
24	Power Partners	Indirect evidence	Athens, GA, United StatesHQ checked Sep 19, 2026	1,001-5,000	174 contacts →
	Indirect evidence “Power Partners is a leading manufacturer of distribution transformers in North America.” Source: RevenueBase Database · checked Sep 19, 2026
25	Pennsylvania Transformer Technology LLC PTT	Indirect evidence	Canonsburg, PA, United StatesHQ checked Sep 19, 2026	201-500	169 contacts →
	Indirect 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 19, 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: electrical transmission equipment suppliers. 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 electrical transmission equipment suppliers.
Partial evidence: Its own public description names part of electrical transmission equipment suppliers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical transmission equipment suppliers. 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 600 electrical transmission equipment suppliers based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 12,748 reachable decision-makers.

Free signup · no credit card

View the full list →

Electrical transmission equipment suppliers based in the United States at a glance

As of Sep 19, 2026

35.9%Verified-email coverage

59.2Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

196

11-50

205

51-200

114

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 600 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 electrical transmission equipment suppliers, 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 “electrical transmission equipment suppliers”. 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 electrical transmission equipment suppliers), 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 electrical transmission equipment suppliers, 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, 12,748 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 19, 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.

Electrical transmission equipment suppliers by metro

Electrical transmission equipment suppliers 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 electrical transmission equipment suppliers, 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 electrical transmission equipment suppliers are there based in the United States?

RevenueBase identified 600 electrical transmission equipment suppliers 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 electrical transmission equipment suppliers?

Houston leads with 29 headquartered companies, followed by Bristol (6) and New York (5).

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 12,748 verified decision-maker contacts tracked across these 600 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 600 electrical transmission equipment suppliers based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Electrical transmission equipment suppliers by geography

Browse the directory

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.