Browse 1,457 energy companies in Ireland — registry-sourced from CRO, scoped to NACE 35 and 06. Each record carries up to up to 500 firmographic attributes — from CRO Number and registered address to revenue, headcount and corporate group structure. The largest by revenue are Electricity Supply Board ($6.1B), WEATHERFORD INTERNATIONAL PUBLIC LIMITED COMPANY ($5.5B) and ESB INDEPENDENT ENERGY LIMITED ($1.9B).
Top companies
The largest energy companies in Ireland by revenue are Electricity Supply Board ($6.1B), WEATHERFORD INTERNATIONAL PUBLIC LIMITED COMPANY ($5.5B) and ESB INDEPENDENT ENERGY LIMITED ($1.9B). The directory below ranks them — sort any column, or filter by sub-sector, company size and region.
Last updated June 2026.
Every Irish energy companies record with all attributes, by API, bulk export or CRM enrichment.
Showing 25 of 1,457 Irish energy companies· click a column to sort, or a company for its full record
| Electric power generation, transmission and distribution | 7,870 | $6.1B | |
| Extraction of crude petroleum | 18,915 | $5.5B | |
| Electric power generation, transmission and distribution | 3 | $1.9B | |
| Electric power generation, transmission and distribution | 99 | $1.6B | |
| Extraction of crude petroleum | 601 | $1.4B | |
| Electric power generation, transmission and distribution | 471 | $1.3B | |
| Electric power generation, transmission and distribution | 170 | $828M | |
| Manufacture of gas; distribution of gaseous fuels through mains | 726 | $655M | |
| Electric power generation, transmission and distribution | 487 | $444M | |
| Electric power generation, transmission and distribution | 88 | $363M | |
| Electric power generation, transmission and distribution | 31 | $334M | |
| Manufacture of gas; distribution of gaseous fuels through mains | 100 | $328M | |
| Manufacture of gas; distribution of gaseous fuels through mains | 3 | $328M | |
| Electric power generation, transmission and distribution | 112 | $283M | |
| Extraction of crude petroleum | 15 | $188M | |
| Extraction of crude petroleum | 8 | $183M | |
| Electric power generation, transmission and distribution | 480 | $163M | |
| Electric power generation, transmission and distribution | 32 | $151M | |
| Electric power generation, transmission and distribution | 104 | $144M | |
| Electric power generation, transmission and distribution | 3 | $142M | |
| Electric power generation, transmission and distribution | 48 | $131M | |
| Extraction of crude petroleum | 7 | $130M | |
| Extraction of crude petroleum | 389 | $124M | |
| Electric power generation, transmission and distribution | 1 | $108M | |
| Extraction of crude petroleum | 4 | $97M |
This is a sample. The full database holds 1,457 Irish energy companies, each with every attribute in the dictionary below.
Database overview
Distributions across all 1,457 energy companies in Ireland — registry-sourced from CRO and refreshed daily.
These distributions are computed from the full Irish energy companies database, not the sample above.
Data coverage
Legal name, registered address, NACE sub-sector, legal form, founding year and website. Every record is keyed to its CRO Number — the stable CRO identifier that survives name changes and rebrands, making it the most reliable CRM deduplication key for Ireland data.
Each company is geocoded to GPS coordinates covering its registered seat and operating locations across Ireland, with a precision level on every point — useful for territory planning and proximity targeting.
Records carry the CRO Number and, where applicable, the VAT registration number, with a flag for when the two coincide. These are the cleanest match keys for enriching lists and cross-referencing against the national tax authority and your CRM.
InfobelPRO resolves the corporate hierarchy — parent, subsidiaries and the size of the worldwide corporate family — so sales and compliance teams can see who controls an entity before engaging or onboarding it.
Annual revenue in local currency, EUR and USD, employee headcount and founding year, with multi-year history where filed. Figures are sourced from CRO filings and carry an Actual-or-Modeled reliability flag.
Data dictionary
The full field catalogue behind each record. Contact data (email, phone, executives) is part of the licensed dataset but is never displayed on this page.
Source comparison
CRO gives you legal registration data. InfobelPRO adds the commercial intelligence sales, marketing and compliance teams actually need.
| Attribute | CROFree official registry | InfobelPRO |
|---|---|---|
| CRO Number | Yes | Yes — on 99.9% of records |
| Legal name & registered address | Yes | Yes |
| Company status (HQ / branch) | Yes | Yes — daily sync |
| NACE sub-sector classification | Yes | Yes — up to 6 codes |
| Annual revenue (local / EUR / USD) | Filings only | Yes — multi-currency |
| Employee count | No | Yes |
| Decision-maker contacts | No | Yes — licensed |
| Geocoded coordinates | No | Yes |
| Corporate group structure | Filings only | Yes — full hierarchy |
| API access | No | Yes — REST API |
| Bulk export (CSV / JSON / Parquet) | No | Yes |
| Update frequency | Periodic (filings) | Daily sync |
FAQ
API access, bulk export or CRM enrichment — 1,457 records with up to up to 500 attributes each.
Explore more
Related directories
See all company directories in Ireland, explore the full Ireland business database In the US classification, related SIC codes include SIC 4911 — Electric Services, SIC 4923 — Natural Gas Transmission and Distribution and SIC 2097 — Manufactured Ice., or see how Ireland fits into the wider Europe business database.
