Ireland

Top 7 largest Irish Companies in the Energy sector by Market Cap

This is the list of the largest public listed companies in the Energy sector from Ireland by market capitalization with links to their reference stock and industry.

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Top Energy Companies from Ireland as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 DCC plc $5.23 B Ireland Irish Energy Irish Oil & Gas Refining & Marketing
2 Falcon Oil & Gas Ltd. $173.7 M Ireland Irish Energy Irish Oil & Gas E&P
3 San Leon Energy plc $93.9 M

(July 1, 2024)

 Ireland Irish Energy Irish Oil & Gas E&P
4 Clontarf Energy plc $2.5 M Ireland Irish Energy Irish Oil & Gas E&P
5 Petrel Resources plc $2.1 M Ireland Irish Energy Irish Oil & Gas E&P
6 Lansdowne Oil & Gas plc $1.7 M Ireland Irish Energy Irish Oil & Gas E&P
7 Kibo Energy plc $13,861 Ireland Irish Energy Irish Thermal Coal

Top Energy Companies from Ireland as of Jan. 01, 2026

1. DCC plc

Company Profile: DCC plc
Market Cap (USD): $5.23 B
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas Refining & Marketing

2. Falcon Oil & Gas Ltd.

Company Profile: Falcon Oil & Gas Ltd.
Market Cap (USD): $173.7 M
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

3. San Leon Energy plc

Company Profile: San Leon Energy plc
Market Cap (USD): $93.9 M (July 1, 2024)
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

4. Clontarf Energy plc

Company Profile: Clontarf Energy plc
Market Cap (USD): $2.5 M
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

5. Petrel Resources plc

Company Profile: Petrel Resources plc
Market Cap (USD): $2.1 M
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

6. Lansdowne Oil & Gas plc

Company Profile: Lansdowne Oil & Gas plc
Market Cap (USD): $1.7 M
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

7. Kibo Energy plc

Company Profile: Kibo Energy plc
Market Cap (USD): $13,861
Country: Ireland
Sector: Irish Energy
Industry: Irish Thermal Coal

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