Thailand

Top 16 largest Thai Companies in the Energy sector by Market Cap

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

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

Rank Company Market Cap (USD) Country Sector Industry
1 PTT PCL $28.31 B Thailand Thai Energy Thai Oil & Gas Integrated
2 PTT Exploration & Production PCL $13.42 B Thailand Thai Energy Thai Oil & Gas E&P
3 PTT Oil and Retail Business Public Company Ltd $5.04 B Thailand Thai Energy Thai Oil & Gas Refining & Marketing
4 Thai Oil Public Company Ltd $2.50 B Thailand Thai Energy Thai Oil & Gas Refining & Marketing
5 Banpu Public Company Ltd $1.59 B Thailand Thai Energy Thai Thermal Coal
6 Bangchak Corp Public Company Ltd $1.26 B Thailand Thai Energy Thai Oil & Gas Refining & Marketing
7 Esso $900.7 M

(Jan. 1, 2024)

 Thailand Thai Energy Thai Oil & Gas Refining & Marketing
8 Star Petroleum Refining Public Company Ltd $784.3 M Thailand Thai Energy Thai Oil & Gas Refining & Marketing
9 IRPC PCL $654.2 M Thailand Thai Energy Thai Oil & Gas Refining & Marketing
10 Prima Marine Public Company Ltd $429.9 M Thailand Thai Energy Thai Oil & Gas Midstream
11 Siamgas and Petrochemicals Public Company Ltd $405.3 M Thailand Thai Energy Thai Oil & Gas Refining & Marketing
12 Lanna Resources Public Company Ltd $249.9 M Thailand Thai Energy Thai Thermal Coal
13 Susco Public Company Ltd $75.0 M

(July 1, 2025)

 Thailand Thai Energy Thai Oil & Gas Refining & Marketing
14 Sea Oil Public Company Ltd $54.7 M

(July 1, 2025)

 Thailand Thai Energy Thai Oil & Gas Refining & Marketing
15 AI Energy Public Company Ltd $46.1 M Thailand Thai Energy Thai Oil & Gas Refining & Marketing
16 Power Solution Technologies Public Company Ltd $28.6 M Thailand Thai Energy Thai Oil & Gas Midstream

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

1. PTT PCL

Company Profile: PTT PCL
Market Cap (USD): $28.31 B
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Integrated

2. PTT Exploration & Production PCL

Company Profile: PTT Exploration & Production PCL
Market Cap (USD): $13.42 B
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas E&P

3. PTT Oil and Retail Business Public Company Ltd

Company Profile: PTT Oil and Retail Business Public Company Ltd
Market Cap (USD): $5.04 B
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

4. Thai Oil Public Company Ltd

Company Profile: Thai Oil Public Company Ltd
Market Cap (USD): $2.50 B
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

5. Banpu Public Company Ltd

Company Profile: Banpu Public Company Ltd
Market Cap (USD): $1.59 B
Country: Thailand
Sector: Thai Energy
Industry: Thai Thermal Coal

6. Bangchak Corp Public Company Ltd

Company Profile: Bangchak Corp Public Company Ltd
Market Cap (USD): $1.26 B
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

7. Esso

Company Profile: Esso
Market Cap (USD): $900.7 M (Jan. 1, 2024)
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

8. Star Petroleum Refining Public Company Ltd

Company Profile: Star Petroleum Refining Public Company Ltd
Market Cap (USD): $784.3 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

9. IRPC PCL

Company Profile: IRPC PCL
Market Cap (USD): $654.2 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

10. Prima Marine Public Company Ltd

Company Profile: Prima Marine Public Company Ltd
Market Cap (USD): $429.9 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Midstream

11. Siamgas and Petrochemicals Public Company Ltd

Company Profile: Siamgas and Petrochemicals Public Company Ltd
Market Cap (USD): $405.3 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

12. Lanna Resources Public Company Ltd

Company Profile: Lanna Resources Public Company Ltd
Market Cap (USD): $249.9 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Thermal Coal

13. Susco Public Company Ltd

Company Profile: Susco Public Company Ltd
Market Cap (USD): $75.0 M (July 1, 2025)
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

14. Sea Oil Public Company Ltd

Company Profile: Sea Oil Public Company Ltd
Market Cap (USD): $54.7 M (July 1, 2025)
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

15. AI Energy Public Company Ltd

Company Profile: AI Energy Public Company Ltd
Market Cap (USD): $46.1 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Refining & Marketing

16. Power Solution Technologies Public Company Ltd

Company Profile: Power Solution Technologies Public Company Ltd
Market Cap (USD): $28.6 M
Country: Thailand
Sector: Thai Energy
Industry: Thai Oil & Gas Midstream

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