Company lists · Data refreshed September 2026

Top 25 Transmission line manufacturers based in the United States

RevenueBase identified 295 transmission line manufacturers headquartered in the United States as of September 2026 and tracks 17,633 professional contacts across them, including 6,342 with verified work emails. Houston is the largest hub.

This list covers transmission line 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
295Companies
17,633Contacts tracked
6,342Verified emails
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The 25 largest transmission line manufacturers based in the United States

Ranked by team size
Top 25 of 295 transmission line 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 transmission line 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceColumbia, SC, United StatesHQ checked Sep 30, 20261,001-5,0001,079 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 30, 2026
2Strong evidenceFremont, CA, United StatesHQ checked Sep 30, 20261,001-5,000969 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 30, 2026
3Partial evidenceHouston, TX, United StatesHQ checked Sep 30, 20261,001-5,000928 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 30, 2026
4Partial evidenceBillings, MT, United StatesHQ checked Sep 30, 20261,001-5,000890 contacts →

Partial evidence

“Electrical Consultants, Inc.(ECI) is an employee-owned, national provider of high voltage transmission, substation, and distribution solutions.”

Source: RevenueBase Database · checked Sep 30, 2026
5Indirect evidenceFort Mill, SC, United StatesHQ checked Sep 30, 20261,001-5,000858 contacts →

Indirect 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 30, 2026
6Indirect evidenceIron Mountain, MI, United StatesHQ checked Sep 30, 20261,001-5,000621 contacts →

Indirect evidence

“M.”

Source: RevenueBase Database · checked Sep 30, 2026
7Strong evidenceKansas City, MO, United StatesHQ checked Sep 30, 20261,001-5,000606 contacts →

Strong evidence

“PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…”

Source: RevenueBase Database · checked Sep 30, 2026
8Strong evidenceRichland, MS, United StatesHQ checked Sep 30, 2026501-1,000559 contacts →

Strong evidence

“Irby Construction Company, a wholly owned subsidiary of Quanta Services, Inc, excels in the processes required for major transmission, substation and distribution line…”

Source: RevenueBase Database · checked Sep 30, 2026
9Indirect evidenceRamsey, NJ, United StatesHQ checked Sep 30, 20261,001-5,000477 contacts →

Indirect evidence

“The Okonite Company was founded in 1878 making it one of the original insulators of electrical wire and cable in the United States.”

Source: RevenueBase Database · checked Sep 30, 2026
10Indirect evidenceSumner, WA, United StatesHQ checked Sep 30, 20261,001-5,000374 contacts →

Indirect evidence

“Potelco Inc is an utilities company based out of Sumner, Washington, United States.”

Source: RevenueBase Database · checked Sep 30, 2026
11Indirect evidenceRoanoke, VA, United StatesHQ checked Sep 30, 20261,001-5,000342 contacts →

Indirect 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 30, 2026
12Strong evidenceWallingford, CT, United StatesHQ checked Sep 30, 2026201-500342 contacts →

Strong evidence

“Times Microwave Systems is the leader in coaxial transmission line technology and production.”

Source: RevenueBase Database · checked Sep 30, 2026
13Indirect evidenceCanby, OR, United StatesHQ checked Sep 30, 2026201-500319 contacts →

Indirect evidence

“Wilson specializes in electric utility construction.”

Source: RevenueBase Database · checked Sep 30, 2026
14Indirect evidenceIrvine, CA, United StatesHQ checked Sep 30, 2026201-500304 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 30, 2026
15Indirect evidenceCastle Rock, United StatesHQ checked Sep 30, 20261,001-5,000286 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 30, 2026
16Indirect evidenceWillow Grove, PA, United StatesHQ checked Sep 30, 20261,001-5,000284 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 30, 2026
17Indirect evidenceKansas City, MO, United StatesHQ checked Sep 30, 2026501-1,000266 contacts →

Indirect evidence

“Milbank provides the tools that empower life.”

Source: RevenueBase Database · checked Sep 30, 2026
18Indirect evidenceLebanon, MO, United StatesHQ checked Sep 30, 2026501-1,000187 contacts →

Indirect evidence

“The Durham Company specializes in the Design, Manufacturing, and Sales of products in the Electrical Utility Marketplace.”

Source: RevenueBase Database · checked Sep 30, 2026
19Indirect evidenceRapid City, SD, United StatesHQ checked Sep 30, 2026501-1,000182 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 30, 2026
20Indirect evidenceNew Berlin, WI, United StatesHQ checked Sep 30, 20261,001-5,000175 contacts →

Indirect evidence

“Every day, we install the pipes and cables that power our lives-from lighting offices to heating homes.”

Source: RevenueBase Database · checked Sep 30, 2026
21Indirect evidenceMilford, NH, United StatesHQ checked Sep 30, 2026201-500167 contacts →

Indirect evidence

“Marmon Utility is the parent company of Hendrix & Kerite and has been providing the T&D industry with reliable cable for over 200 years, respectively.”

Source: RevenueBase Database · checked Sep 30, 2026
22Indirect evidencePineville, LA, United StatesHQ checked Sep 30, 202651-200150 contacts →

Indirect evidence

“You needed that substation yesterday.”

Source: RevenueBase Database · checked Sep 30, 2026
23Partial evidenceMemphis, TN, United StatesHQ checked Sep 30, 2026501-1,000147 contacts →

Partial evidence

“Aluma-Form is a rapidly growing manufacturer of innovative, custom-engineered overhead utility and communications solutions.”

Source: RevenueBase Database · checked Sep 30, 2026
24Strong evidenceHeber, UT, United StatesHQ checked Sep 30, 2026201-500144 contacts →

Strong evidence

“Probst specializes in high-voltage transmission line construction, along with design-build, and maintenance services for both the public and private sector utilities.”

Source: RevenueBase Database · checked Sep 30, 2026
25Indirect evidenceReading, PA, United StatesHQ checked Sep 30, 202651-200132 contacts →

Indirect evidence

“Substation Engineering Company (SECo), is a full service engineering and design firm with a dedicated team of experienced personnel providing a full range of cost effective…”

Source: RevenueBase Database · checked Sep 30, 2026

Showing 25 of 295 transmission line manufacturers based in the United States

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Transmission line manufacturers based in the United States at a glance

As of Sep 30, 2026
36.0%Verified-email coverage
59.8Average contacts per company
51-200Median size (employees)
2.4%Largest-city concentration · Houston
Sep 30, 2026Page data refreshed

Companies by employee count

1-10
64
11-50
74
51-200
87
201-500
34
501-1,000
14
1,001-5,000
22

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 295 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 transmission line 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 “transmission line 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 transmission line 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 transmission line 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, 6,342 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 transmission line 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 transmission line manufacturers are there based in the United States?

RevenueBase identified 295 transmission line 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?

Hubbell Power Systems, headquartered in Columbia, tops this list with the largest team on record.

Which city has the most transmission line manufacturers?

Houston leads with 7 headquartered companies, followed by Birmingham (4) and Mesa (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 6,342 verified decision-maker contacts tracked across these 295 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.