Company lists · Data refreshed September 2026

Top 25 Electricity transmission companies based in the United States

Name: Electricity transmission companies 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 257 companies tracked

RevenueBase identified 257 electricity transmission companies headquartered in the United States as of September 2026 and tracks 42,408 professional contacts across them, including 15,446 with verified work emails. Houston is the largest hub.

This list covers electricity transmission companies 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

257Companies

42,408Contacts tracked

15,446Verified emails

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The 25 largest electricity transmission companies based in the United States

Ranked by team size

Top 25 of 257 electricity transmission companies 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 electricity transmission companies: 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	American Electric Power	Indirect evidence	Columbus, OH, United StatesHQ checked Sep 19, 2026	10001+	10,964 contacts →
	Indirect evidence “Our team at American Electric Power is committed to improving our customers' lives with reliable, affordable power.” Source: RevenueBase Database · checked Sep 19, 2026
2	Firstenergy	Indirect evidence	Akron, OH, United StatesHQ checked Sep 19, 2026	10001+	6,434 contacts →
	Indirect evidence “We are a forward-thinking electric utility centered on integrity, powered by a diverse team of employees committed to making customers’ lives brighter, the environment better and…” Source: RevenueBase Database · checked Sep 19, 2026
3	Oncor Electric Delivery	Strong evidence	Dallas, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	3,586 contacts →
	Strong evidence “Oncor Electric Delivery Company LLC, headquartered in Dallas, is a regulated electricity distribution and transmission business that uses superior asset management skills to…” Source: RevenueBase Database · checked Sep 19, 2026
4	Nextera Energy, INC	Partial evidence	Juno Beach, FL, United StatesHQ checked Sep 19, 2026	10001+	3,478 contacts →
	Partial evidence “NextEra Energy, Inc.(NYSE: NEE) is one of the largest electric power and energy infrastructure companies in North America and is a leading provider of electricity to American…” Source: RevenueBase Database · checked Sep 19, 2026
5	ITC Holdings Corp	Strong evidence	Novi, MI, United StatesHQ checked Sep 19, 2026	501-1,000	1,486 contacts →
	Strong evidence “From electric vehicles to renewables, we’re looking at electricity in a whole new way- because transmission is the key to unlocking our energy future.” Source: RevenueBase Database · checked Sep 19, 2026
6	Hubbell Power Systems	Partial evidence	Columbia, SC, United StatesHQ checked Sep 19, 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 19, 2026
7	Mitsubishi Electric Power Products, INC	Indirect evidence	Warrendale, PA, United StatesHQ checked Sep 19, 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 19, 2026
8	Dashiell Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	940 contacts →
	Indirect 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 19, 2026
9	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
10	Electrical Consultants, INC	Partial evidence	Billings, MT, United StatesHQ checked Sep 19, 2026	1,001-5,000	890 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 19, 2026
11	California ISO	Partial evidence	Folsom, CA, United StatesHQ checked Sep 19, 2026	501-1,000	847 contacts →
	Partial evidence “The California Independent System Operator (ISO) manages the flow of electricity across the high-voltage, long-distance power lines that make up 80 percent of California's power…” Source: RevenueBase Database · checked Sep 19, 2026
12	ATC	Indirect evidence	Waukesha, WI, United StatesHQ checked Sep 19, 2026	501-1,000	678 contacts →
	Indirect evidence “ATC is connecting you with a sustainable energy future.” Source: RevenueBase Database · checked Sep 19, 2026
13	Irby Construction Company	Partial evidence	Richland, MS, United StatesHQ checked Sep 19, 2026	501-1,000	559 contacts →
	Partial 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 19, 2026
14	Open Systems International	Indirect evidence	Bedford, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	422 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
15	K&a Power	Indirect evidence	Syracuse, NY, United StatesHQ checked Sep 19, 2026	201-500	410 contacts →
	Indirect evidence “K&A Power is a global energy infrastructure company focused on developing, engineering, delivering, and operating the critical systems that power modern economies.” Source: RevenueBase Database · checked Sep 19, 2026
16	RMS Energy Co, LLC	Indirect evidence	Little Falls, MN, United StatesHQ checked Sep 19, 2026	501-1,000	288 contacts →
	Indirect 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
17	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
18	Cooperative Energy	Partial evidence	Hattiesburg, MS, United StatesHQ checked Sep 19, 2026	201-500	242 contacts →
	Partial evidence “Cooperative Energy generates and transmits electricity for 11 Member distribution systems across Mississippi.” Source: RevenueBase Database · checked Sep 19, 2026
19	Texas-New Mexico Power Tnmp	Strong evidence	Lewisville, TX, United StatesHQ checked Sep 19, 2026	201-500	226 contacts →
	Strong evidence “Texas-New Mexico Power is an electricity transmission and distribution service provider- We provide electricity to more than homes and businesses throughout Texas- We have about…” Source: RevenueBase Database · checked Sep 19, 2026
20	Newkirk Electric Associates, INC	Indirect evidence	Muskegon, MI, United StatesHQ checked Sep 19, 2026	501-1,000	193 contacts →
	Indirect evidence “Newkirk Electric is a family-owned and operated, Michigan-based company headquartered on the shorelines of West Michigan.” Source: RevenueBase Database · checked Sep 19, 2026
21	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
22	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
23	Beta Engineering	Indirect evidence	Pineville, LA, United StatesHQ checked Sep 19, 2026	51-200	150 contacts →
	Indirect evidence “You needed that substation yesterday.” Source: RevenueBase Database · checked Sep 19, 2026
24	L & S Electric, INC	Indirect evidence	Schofield, WI, United StatesHQ checked Sep 19, 2026	201-500	146 contacts →
	Indirect evidence “L&S offers legendary service to customers who produce power or use it to drive their business.” Source: RevenueBase Database · checked Sep 19, 2026
25	Probst Electric INC	Partial evidence	Heber, UT, United StatesHQ checked Sep 19, 2026	201-500	144 contacts →
	Partial 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 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: electricity transmission companies. 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 electricity transmission companies.
Partial evidence: Its own public description names part of electricity transmission companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electricity transmission companies. 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 257 electricity transmission companies based in the United States

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Electricity transmission companies based in the United States at a glance

As of Sep 19, 2026

36.4%Verified-email coverage

165.0Average contacts per company

11-50Median size (employees)

5.1%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 257 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 electricity transmission companies, 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 “electricity transmission companies”. 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 electricity transmission companies), 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 electricity transmission companies, 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, 15,446 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.

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 electricity transmission companies, 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 electricity transmission companies are there based in the United States?

RevenueBase identified 257 electricity transmission companies 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?

American Electric Power, headquartered in Columbus, tops this list with the largest team on record.

Which city has the most electricity transmission companies?

Houston leads with 13 headquartered companies, followed by New York (7) and Austin (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 15,446 verified decision-maker contacts tracked across these 257 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.

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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.