Thailand

Top 29 largest Thai Companies in the Utilities sector by Market Cap

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

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

Rank Company Market Cap (USD) Country Sector Industry
1 Gulf Energy Development Public Company Ltd $19.08 B Thailand Thai Utilities Thai Utilities—Renewable
2 Global Power Synergy Public Company Ltd $3.06 B Thailand Thai Utilities Thai Utilities—Regulated Electric
3 Ratch Group Public Company Ltd $2.04 B Thailand Thai Utilities Thai Utilities—Regulated Electric
4 Electricity Generating Public Company Ltd $1.90 B Thailand Thai Utilities Thai Utilities—Independent Power Producers
5 Banpu Power Public Company Ltd $1.25 B Thailand Thai Utilities Thai Utilities—Independent Power Producers
6 TTW PCL $1.15 B Thailand Thai Utilities Thai Utilities—Regulated Water
7 B.Grimm Power Public Company Ltd $1.13 B Thailand Thai Utilities Thai Utilities—Independent Power Producers
8 BCPG Public Company Ltd $646.5 M Thailand Thai Utilities Thai Utilities—Renewable
9 Energy Absolute Public Company Ltd $617.5 M Thailand Thai Utilities Thai Utilities—Renewable
10 CK Power Public Company Ltd $588.2 M Thailand Thai Utilities Thai Utilities—Renewable
11 WHA Utilities and Power Public Company Ltd $565.6 M Thailand Thai Utilities Thai Utilities—Regulated Water
12 TPI Polene Power Public Company Ltd $482.5 M Thailand Thai Utilities Thai Utilities—Renewable
13 Absolute Clean Energy Public Company Ltd $399.3 M Thailand Thai Utilities Thai Utilities—Renewable
14 SPCG Public Company Ltd $293.2 M Thailand Thai Utilities Thai Utilities—Renewable
15 Rojana Industrial Park Public Company Ltd $282.1 M Thailand Thai Utilities Thai Utilities—Independent Power Producers
16 Sermsang Power Corp Public Company Ltd $122.8 M Thailand Thai Utilities Thai Utilities—Renewable
17 Super Energy Corp Public Company Ltd $86.8 M Thailand Thai Utilities Thai Utilities—Renewable
18 Padaeng Industry Public Company Ltd $85.2 M

(Oct. 1, 2021)

 Thailand Thai Utilities Thai Utilities—Renewable
19 Eastern Water Resources Development and Management Public Company Ltd $83.7 M

(July 1, 2025)

 Thailand Thai Utilities Thai Utilities—Regulated Water
20 United Power of Asia Public Company Ltd $78.3 M

(April 1, 2023)

 Thailand Thai Utilities Thai Utilities—Independent Power Producers
21 Sahacogen $78.3 M

(July 1, 2025)

 Thailand Thai Utilities Thai Utilities—Regulated Electric
22 WP Energy Public Company Ltd $54.8 M

(July 1, 2025)

 Thailand Thai Utilities Thai Utilities—Regulated Gas
23 SAAM Energy Development Public Company Ltd $52.8 M Thailand Thai Utilities Thai Utilities—Renewable
24 Earth Tech Environment Public Company Ltd $39.8 M Thailand Thai Utilities Thai Utilities—Renewable
25 Eastern Power Group Public Company Ltd $35.5 M Thailand Thai Utilities Thai Utilities—Renewable
26 Thai Solar Energy Public Company Ltd $32.2 M Thailand Thai Utilities Thai Utilities—Renewable
27 TPC Power Holding Public Company Ltd $17.7 M Thailand Thai Utilities Thai Utilities—Renewable
28 Scan Inter Public Company Ltd $15.8 M Thailand Thai Utilities Thai Utilities—Regulated Gas
29 Prime Road Power Public Company Ltd $9.5 M Thailand Thai Utilities Thai Utilities—Renewable

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

1. Gulf Energy Development Public Company Ltd

Company Profile: Gulf Energy Development Public Company Ltd
Market Cap (USD): $19.08 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

2. Global Power Synergy Public Company Ltd

Company Profile: Global Power Synergy Public Company Ltd
Market Cap (USD): $3.06 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Electric

3. Ratch Group Public Company Ltd

Company Profile: Ratch Group Public Company Ltd
Market Cap (USD): $2.04 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Electric

4. Electricity Generating Public Company Ltd

Company Profile: Electricity Generating Public Company Ltd
Market Cap (USD): $1.90 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Independent Power Producers

5. Banpu Power Public Company Ltd

Company Profile: Banpu Power Public Company Ltd
Market Cap (USD): $1.25 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Independent Power Producers

6. TTW PCL

Company Profile: TTW PCL
Market Cap (USD): $1.15 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Water

7. B.Grimm Power Public Company Ltd

Company Profile: B.Grimm Power Public Company Ltd
Market Cap (USD): $1.13 B
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Independent Power Producers

8. BCPG Public Company Ltd

Company Profile: BCPG Public Company Ltd
Market Cap (USD): $646.5 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

9. Energy Absolute Public Company Ltd

Company Profile: Energy Absolute Public Company Ltd
Market Cap (USD): $617.5 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

10. CK Power Public Company Ltd

Company Profile: CK Power Public Company Ltd
Market Cap (USD): $588.2 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

11. WHA Utilities and Power Public Company Ltd

Company Profile: WHA Utilities and Power Public Company Ltd
Market Cap (USD): $565.6 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Water

12. TPI Polene Power Public Company Ltd

Company Profile: TPI Polene Power Public Company Ltd
Market Cap (USD): $482.5 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

13. Absolute Clean Energy Public Company Ltd

Company Profile: Absolute Clean Energy Public Company Ltd
Market Cap (USD): $399.3 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

14. SPCG Public Company Ltd

Company Profile: SPCG Public Company Ltd
Market Cap (USD): $293.2 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

15. Rojana Industrial Park Public Company Ltd

Company Profile: Rojana Industrial Park Public Company Ltd
Market Cap (USD): $282.1 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Independent Power Producers

16. Sermsang Power Corp Public Company Ltd

Company Profile: Sermsang Power Corp Public Company Ltd
Market Cap (USD): $122.8 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

17. Super Energy Corp Public Company Ltd

Company Profile: Super Energy Corp Public Company Ltd
Market Cap (USD): $86.8 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

18. Padaeng Industry Public Company Ltd

Company Profile: Padaeng Industry Public Company Ltd
Market Cap (USD): $85.2 M (Oct. 1, 2021)
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

19. Eastern Water Resources Development and Management Public Company Ltd

Company Profile: Eastern Water Resources Development and Management Public Company Ltd
Market Cap (USD): $83.7 M (July 1, 2025)
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Water

20. United Power of Asia Public Company Ltd

Company Profile: United Power of Asia Public Company Ltd
Market Cap (USD): $78.3 M (April 1, 2023)
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Independent Power Producers

21. Sahacogen

Company Profile: Sahacogen
Market Cap (USD): $78.3 M (July 1, 2025)
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Electric

22. WP Energy Public Company Ltd

Company Profile: WP Energy Public Company Ltd
Market Cap (USD): $54.8 M (July 1, 2025)
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Gas

23. SAAM Energy Development Public Company Ltd

Company Profile: SAAM Energy Development Public Company Ltd
Market Cap (USD): $52.8 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

24. Earth Tech Environment Public Company Ltd

Company Profile: Earth Tech Environment Public Company Ltd
Market Cap (USD): $39.8 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

25. Eastern Power Group Public Company Ltd

Company Profile: Eastern Power Group Public Company Ltd
Market Cap (USD): $35.5 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

26. Thai Solar Energy Public Company Ltd

Company Profile: Thai Solar Energy Public Company Ltd
Market Cap (USD): $32.2 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

27. TPC Power Holding Public Company Ltd

Company Profile: TPC Power Holding Public Company Ltd
Market Cap (USD): $17.7 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

28. Scan Inter Public Company Ltd

Company Profile: Scan Inter Public Company Ltd
Market Cap (USD): $15.8 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Regulated Gas

29. Prime Road Power Public Company Ltd

Company Profile: Prime Road Power Public Company Ltd
Market Cap (USD): $9.5 M
Country: Thailand
Sector: Thai Utilities
Industry: Thai Utilities—Renewable

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