Company lists · Data refreshed November 2026
Top 25 Independent system operators based in the United States
RevenueBase identified 55 company matches for independent system operators associated with the United States as of November 2026 and tracks 26,478 professional contacts across them, including 10,298 with verified work emails. Houston is the largest hub.
This list covers company matches for independent system operators associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.
The 25 largest independent system operators based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 11,678 contacts → | ||||
Exact match “Our team at American Electric Power is committed to improving our customers' lives with reliable, affordable power.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 3,856 contacts → | ||||
Exact match “Oncor Electric Delivery Company LLC, headquartered in Dallas, is a regulated electricity distribution and transmission business that uses superior asset management skills to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 1,556 contacts → | ||||
Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 1,291 contacts → | ||||
Exact match “MISO is the electric grid operator for the central United States.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 1,090 contacts → | ||||
Exact match “PJM Interconnection manages the high-voltage electric system that provides power to 67 million people in all or parts of 13 states and the District of Columbia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 1,081 contacts → | ||||
Exact match “The Electric Reliability Council of Texas (ERCOT) manages the flow of electric power to 27 million Texas customers - representing about 90 percent of the state's electric load.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 900 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 889 contacts → | ||||
Exact match “Working together to responsibly and economically keep the lights on today and in the future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 790 contacts → | ||||
Exact match “Keeping the power flowing reliably and at competitive prices to the homes, businesses, and industries across the six diverse states of New England is a complicated, demanding, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 628 contacts → | ||||
Exact match “The New York Independent System Operator (NYISO) is a not-for-profit corporation responsible for operating the state’s bulk electricity grid, administering New York’s competitive…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 388 contacts → | ||||
Exact match “GRDA utilizes a diverse portfolio of electric generation assets to keep rates low and reliability high.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 261 contacts → | ||||
Exact match “Georgia System Operations Corporation is an independent, not-for-profit system operations company owned by our Members: 38 of Georgia’s distribution electric membership…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 259 contacts → | ||||
Exact match “Cooperative Energy generates and transmits electricity for 11 Member distribution systems across Mississippi.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 215 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 207 contacts → | ||||
Exact match “American Municipal Power, Inc,(AMP) is the nonprofit wholesale power supplier and services provider for more than 130 Members in the states of Indiana, Kentucky, Maryland…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 155 contacts → | ||||
Exact match “The electric grid is vital to our everyday lives.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 135 contacts → | ||||
Exact match “Wabash Valley Power Alliance (WVPA) is a not-for-profit generation and transmission cooperative created out of the need for reliable, affordable electricity in America's heartland.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 121 contacts → | ||||
Exact match “Alpha Generation manages and operates power generation facilities that are well positioned to provide reliable, secure, safe, and sustainable sources of power and meet the growing…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 89 contacts → | ||||
Exact match “Northeast Power Coordinating Council, Inc.(NPCC) is a not-for-profit corporation in the state of New York responsible for promoting and enhancing the reliability of the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 87 contacts → | ||||
Exact match “Midwest Reliability Organization (MRO) is dedicated to achieving its vision of a highly reliable and secure North American bulk power system.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 84 contacts → | ||||
Exact match “Texas-based Wind Energy Transmission Texas, LLC,(WETT) is a regulated transmission provider in Texas.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 58 contacts → | ||||
Exact match “SESCO Enterprises is a Power Marketer engaging in the proprietary trading of wholesale electricity products.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 43 contacts → | ||||
Exact match “Dynegy provides wholesale power, capacity and ancillary services to utilities, cooperatives, municipalities and other energy companies in six states in our key U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 41 contacts → | ||||
Exact match “ElectronX (EXI), the first U.S-regulated, direct-access power derivatives market, is the energy exchange created to address volatile short-term price exposure to electricity.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 39 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “independent system operators”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 55 independent system operators based in the United States
See the full list, filter by size, metro and specialty, and access 10,298 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Independent system operators based in the United States at a glance
As of Nov 6, 2026Companies by employee count
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 55 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “independent system operators” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 10,298 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “independent system operators”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many independent system operators are there based in the United States?
RevenueBase identified 55 company matches for independent system operators associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
American Electric Power tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most independent system operators?
Houston leads with 4 company records, followed by New York (3) and Bismarck (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 10,298 professional contacts with verified work emails tracked across these 55 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 55 independent system operators based in the United States. Start with a free account, no credit card.
Download this list →Related lists
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 SmartSearch, 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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States
Company intelligence · public preview
Top 25 independent system operators based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 55 matching company records for independent system operators based in the United States, with 26,478 tracked contacts and 10,298 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 independent system operators based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  American Electric Poweraep.comHQ: Columbus, OH, United StatesReported employees: 10001+ | Columbus, OH, United States | 10001+ | Exact match | 11,678 contacts → |
“Our team at American Electric Power is committed to improving our customers' lives with reliable, affordable power.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Oncor Electric Deliveryoncor.comHQ: Dallas, TX, United StatesReported employees: 1,001-5,000 | Dallas, TX, United States | 1,001-5,000 | Exact match | 3,856 contacts → |
“Oncor Electric Delivery Company LLC, headquartered in Dallas, is a regulated electricity distribution and transmission business that uses superior asset management skills to…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  ITC Holdings Corpitc-holdings.comHQ: Novi, MI, United StatesReported employees: 501-1,000 | Novi, MI, United States | 501-1,000 | Exact match | 1,556 contacts → |
“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.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Midcontinent Independent System Operator Misomisoenergy.orgHQ: Carmel, AR, United StatesReported employees: 1,001-5,000 | Carmel, AR, United States | 1,001-5,000 | Exact match | 1,291 contacts → |
“MISO is the electric grid operator for the central United States.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  PJM Interconnectionpjm.comHQ: Audubon, PA, United StatesReported employees: 501-1,000 | Audubon, PA, United States | 501-1,000 | Exact match | 1,090 contacts → |
“PJM Interconnection manages the high-voltage electric system that provides power to 67 million people in all or parts of 13 states and the District of Columbia.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  ERCOTercot.comHQ: Taylor, TX, United StatesReported employees: 501-1,000 | Taylor, TX, United States | 501-1,000 | Exact match | 1,081 contacts → |
“The Electric Reliability Council of Texas (ERCOT) manages the flow of electric power to 27 million Texas customers - representing about 90 percent of the state's electric load.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  California ISOcaiso.comHQ: Folsom, CA, United StatesReported employees: 501-1,000 | Folsom, CA, United States | 501-1,000 | Exact match | 900 contacts → |
“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…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Southwest Power Poolspp.orgHQ: Little Rock, AR, United StatesReported employees: 501-1,000 | Little Rock, AR, United States | 501-1,000 | Exact match | 889 contacts → |
“Working together to responsibly and economically keep the lights on today and in the future.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  ISO NEW England INCiso-ne.comHQ: Holyoke, CT, United StatesReported employees: 501-1,000 | Holyoke, CT, United States | 501-1,000 | Exact match | 790 contacts → |
“Keeping the power flowing reliably and at competitive prices to the homes, businesses, and industries across the six diverse states of New England is a complicated, demanding, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  NYISOnyiso.comHQ: Rensselaer, NY, United StatesReported employees: 501-1,000 | Rensselaer, NY, United States | 501-1,000 | Exact match | 628 contacts → |
“The New York Independent System Operator (NYISO) is a not-for-profit corporation responsible for operating the state’s bulk electricity grid, administering New York’s competitive…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Grand River DAM Authoritygrda.comHQ: Chouteau, OK, United StatesReported employees: 501-1,000 | Chouteau, OK, United States | 501-1,000 | Exact match | 388 contacts → |
“GRDA utilizes a diverse portfolio of electric generation assets to keep rates low and reliability high.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | HQ: Tucker, GA, United StatesReported employees: 201-500 | Tucker, GA, United States | 201-500 | Exact match | 261 contacts → |
“Georgia System Operations Corporation is an independent, not-for-profit system operations company owned by our Members: 38 of Georgia’s distribution electric membership…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Cooperative Energycooperativeenergy.comHQ: Hattiesburg, MS, United StatesReported employees: 201-500 | Hattiesburg, MS, United States | 201-500 | Exact match | 259 contacts → |
“Cooperative Energy generates and transmits electricity for 11 Member distribution systems across Mississippi.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Texas-New Mexico Power Tnmptnmp.comHQ: Lewisville, TX, United StatesReported employees: 201-500 | Lewisville, TX, United States | 201-500 | Exact match | 215 contacts → |
“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…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  American Municipal Power, INCamppartners.orgHQ: Columbus, OH, United StatesReported employees: 51-200 | Columbus, OH, United States | 51-200 | Exact match | 207 contacts → |
“American Municipal Power, Inc,(AMP) is the nonprofit wholesale power supplier and services provider for more than 130 Members in the states of Indiana, Kentucky, Maryland…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Serc Reliability Corporationserc.orgHQ: Charlotte, NC, United StatesReported employees: 51-200 | Charlotte, NC, United States | 51-200 | Exact match | 155 contacts → |
“The electric grid is vital to our everyday lives.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Wabash Valley Power Alliancewvpa.comHQ: Indianapolis, IN, United StatesReported employees: 51-200 | Indianapolis, IN, United States | 51-200 | Exact match | 135 contacts → |
“Wabash Valley Power Alliance (WVPA) is a not-for-profit generation and transmission cooperative created out of the need for reliable, affordable electricity in America's heartland.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Alpha Generationalphagen.comHQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 121 contacts → |
“Alpha Generation manages and operates power generation facilities that are well positioned to provide reliable, secure, safe, and sustainable sources of power and meet the growing…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 89 contacts → |
“Northeast Power Coordinating Council, Inc.(NPCC) is a not-for-profit corporation in the state of New York responsible for promoting and enhancing the reliability of the…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | HQ: St. Paul, MN, United StatesReported employees: 51-200 | St. Paul, MN, United States | 51-200 | Exact match | 87 contacts → |
“Midwest Reliability Organization (MRO) is dedicated to achieving its vision of a highly reliable and secure North American bulk power system.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Wind Energy Transmission Texas, LLCwindenergyoftexas.comHQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 84 contacts → |
“Texas-based Wind Energy Transmission Texas, LLC,(WETT) is a regulated transmission provider in Texas.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Sesco Enterprisessescollc.comHQ: Greensburg, PA, United StatesReported employees: 51-200 | Greensburg, PA, United States | 51-200 | Exact match | 58 contacts → |
“SESCO Enterprises is a Power Marketer engaging in the proprietary trading of wholesale electricity products.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Dynegy Midwest Generationdynegy.comHQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 43 contacts → |
“Dynegy provides wholesale power, capacity and ancillary services to utilities, cooperatives, municipalities and other energy companies in six states in our key U.S.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Electronxelectronx.comHQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 41 contacts → |
“ElectronX (EXI), the first U.S-regulated, direct-access power derivatives market, is the energy exchange created to address volatile short-term price exposure to electricity.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Axpo U.Saxpo.comHQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 39 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 55 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Independent system operators: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
55 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 55 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for independent system operators?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many independent system operators did RevenueBase find based in the United States?
The saved snapshot records 55 matching company records, 26,478 tracked contacts and 10,298 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 25 independent system operators based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/independent-system-operators/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States
Company intelligence · public preview
Top 25 independent system operators based in the United States
RevenueBase records 55 matching company records for independent system operators based in the United States, with 26,478 tracked contacts and 10,298 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 independent system operators based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | American Electric Poweraep.com HQ: Columbus, OH, United StatesReported employees: 10001+ | Columbus, OH, United States | 10001+ | Exact match | 11,678 contacts → |
“Our team at American Electric Power is committed to improving our customers' lives with reliable, affordable power.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Oncor Electric Deliveryoncor.com HQ: Dallas, TX, United StatesReported employees: 1,001-5,000 | Dallas, TX, United States | 1,001-5,000 | Exact match | 3,856 contacts → |
“Oncor Electric Delivery Company LLC, headquartered in Dallas, is a regulated electricity distribution and transmission business that uses superior asset management skills to…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | ITC Holdings Corpitc-holdings.com HQ: Novi, MI, United StatesReported employees: 501-1,000 | Novi, MI, United States | 501-1,000 | Exact match | 1,556 contacts → |
“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.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Midcontinent Independent System Operator Misomisoenergy.org HQ: Carmel, AR, United StatesReported employees: 1,001-5,000 | Carmel, AR, United States | 1,001-5,000 | Exact match | 1,291 contacts → |
“MISO is the electric grid operator for the central United States.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | PJM Interconnectionpjm.com HQ: Audubon, PA, United StatesReported employees: 501-1,000 | Audubon, PA, United States | 501-1,000 | Exact match | 1,090 contacts → |
“PJM Interconnection manages the high-voltage electric system that provides power to 67 million people in all or parts of 13 states and the District of Columbia.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | ERCOTercot.com HQ: Taylor, TX, United StatesReported employees: 501-1,000 | Taylor, TX, United States | 501-1,000 | Exact match | 1,081 contacts → |
“The Electric Reliability Council of Texas (ERCOT) manages the flow of electric power to 27 million Texas customers - representing about 90 percent of the state's electric load.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | California ISOcaiso.com HQ: Folsom, CA, United StatesReported employees: 501-1,000 | Folsom, CA, United States | 501-1,000 | Exact match | 900 contacts → |
“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…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Southwest Power Poolspp.org HQ: Little Rock, AR, United StatesReported employees: 501-1,000 | Little Rock, AR, United States | 501-1,000 | Exact match | 889 contacts → |
“Working together to responsibly and economically keep the lights on today and in the future.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | ISO NEW England INCiso-ne.com HQ: Holyoke, CT, United StatesReported employees: 501-1,000 | Holyoke, CT, United States | 501-1,000 | Exact match | 790 contacts → |
“Keeping the power flowing reliably and at competitive prices to the homes, businesses, and industries across the six diverse states of New England is a complicated, demanding, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | NYISOnyiso.com HQ: Rensselaer, NY, United StatesReported employees: 501-1,000 | Rensselaer, NY, United States | 501-1,000 | Exact match | 628 contacts → |
“The New York Independent System Operator (NYISO) is a not-for-profit corporation responsible for operating the state’s bulk electricity grid, administering New York’s competitive…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Grand River DAM Authoritygrda.com HQ: Chouteau, OK, United StatesReported employees: 501-1,000 | Chouteau, OK, United States | 501-1,000 | Exact match | 388 contacts → |
“GRDA utilizes a diverse portfolio of electric generation assets to keep rates low and reliability high.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | HQ: Tucker, GA, United StatesReported employees: 201-500 | Tucker, GA, United States | 201-500 | Exact match | 261 contacts → |
“Georgia System Operations Corporation is an independent, not-for-profit system operations company owned by our Members: 38 of Georgia’s distribution electric membership…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Cooperative Energycooperativeenergy.com HQ: Hattiesburg, MS, United StatesReported employees: 201-500 | Hattiesburg, MS, United States | 201-500 | Exact match | 259 contacts → |
“Cooperative Energy generates and transmits electricity for 11 Member distribution systems across Mississippi.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Texas-New Mexico Power Tnmptnmp.com HQ: Lewisville, TX, United StatesReported employees: 201-500 | Lewisville, TX, United States | 201-500 | Exact match | 215 contacts → |
“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…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | American Municipal Power, INCamppartners.org HQ: Columbus, OH, United StatesReported employees: 51-200 | Columbus, OH, United States | 51-200 | Exact match | 207 contacts → |
“American Municipal Power, Inc,(AMP) is the nonprofit wholesale power supplier and services provider for more than 130 Members in the states of Indiana, Kentucky, Maryland…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Serc Reliability Corporationserc.org HQ: Charlotte, NC, United StatesReported employees: 51-200 | Charlotte, NC, United States | 51-200 | Exact match | 155 contacts → |
“The electric grid is vital to our everyday lives.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Wabash Valley Power Alliancewvpa.com HQ: Indianapolis, IN, United StatesReported employees: 51-200 | Indianapolis, IN, United States | 51-200 | Exact match | 135 contacts → |
“Wabash Valley Power Alliance (WVPA) is a not-for-profit generation and transmission cooperative created out of the need for reliable, affordable electricity in America's heartland.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Alpha Generationalphagen.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 121 contacts → |
“Alpha Generation manages and operates power generation facilities that are well positioned to provide reliable, secure, safe, and sustainable sources of power and meet the growing…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 89 contacts → |
“Northeast Power Coordinating Council, Inc.(NPCC) is a not-for-profit corporation in the state of New York responsible for promoting and enhancing the reliability of the…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | HQ: St. Paul, MN, United StatesReported employees: 51-200 | St. Paul, MN, United States | 51-200 | Exact match | 87 contacts → |
“Midwest Reliability Organization (MRO) is dedicated to achieving its vision of a highly reliable and secure North American bulk power system.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Wind Energy Transmission Texas, LLCwindenergyoftexas.com HQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 84 contacts → |
“Texas-based Wind Energy Transmission Texas, LLC,(WETT) is a regulated transmission provider in Texas.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Sesco Enterprisessescollc.com HQ: Greensburg, PA, United StatesReported employees: 51-200 | Greensburg, PA, United States | 51-200 | Exact match | 58 contacts → |
“SESCO Enterprises is a Power Marketer engaging in the proprietary trading of wholesale electricity products.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Dynegy Midwest Generationdynegy.com HQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 43 contacts → |
“Dynegy provides wholesale power, capacity and ancillary services to utilities, cooperatives, municipalities and other energy companies in six states in our key U.S.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Electronxelectronx.com HQ: Chicago, IL, United StatesReported employees: 11-50 | Chicago, IL, United States | 11-50 | Exact match | 41 contacts → |
“ElectronX (EXI), the first U.S-regulated, direct-access power derivatives market, is the energy exchange created to address volatile short-term price exposure to electricity.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Axpo U.Saxpo.com HQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 39 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 55 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Independent system operators: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
55 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 55 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for independent system operators?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many independent system operators did RevenueBase find based in the United States?
The saved snapshot records 55 matching company records, 26,478 tracked contacts and 10,298 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 25 independent system operators based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/independent-system-operators/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States