Thailand

Top 440 largest Thai Companies by Market Cap

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

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Top Companies from Thailand as of Jan. 01, 2026

Rank Company Market Cap (USD) Country Sector Industry
1 Delta Electronics $76.00 B Thailand Thai Industrials Thai Electrical Equipment & Parts
2 Advanced Info Service PCL $28.79 B Thailand Thai Communication Services Thai Telecom Services
3 PTT PCL $28.31 B Thailand Thai Energy Thai Oil & Gas Integrated
4 Airports of Thailand Public Company Ltd $24.03 B Thailand Thai Industrials Thai Airports & Air Services
5 Gulf Energy Development Public Company Ltd $19.08 B Thailand Thai Utilities Thai Utilities—Renewable
6 Kasikornbank Public Company Ltd $14.40 B Thailand Thai Financials Thai Banks—Regional
7 The Siam Commercial Bank Public Company Ltd $14.05 B Thailand Thai Financials Thai Banks—Regional
8 PTT Exploration & Production PCL $13.42 B Thailand Thai Energy Thai Oil & Gas E&P
9 Krung Thai Bank PCL $12.64 B Thailand Thai Financials Thai Banks—Regional
10 True Corp Public Company Ltd $12.28 B Thailand Thai Communication Services Thai Telecom Services
11 CP ALL Public Company Ltd $12.24 B Thailand Thai Consumer Staples Thai Grocery Stores
12 Siam Makro Public Company Ltd $10.74 B

(July 1, 2023)

 Thailand Thai Consumer Discretionary Thai Department Stores
13 Bangkok Bank Public Company Ltd $9.99 B Thailand Thai Financials Thai Banks—Regional
14 Bangkok Dusit Medical Services Public Company Ltd $9.53 B Thailand Thai Healthcare Thai Medical Care Facilities
15 Intouch Holdings Public Company Ltd $9.39 B

(Jan. 1, 2025)

 Thailand Thai Communication Services Thai Telecom Services
16 Thai Beverage Public Company Ltd $9.10 B Thailand Thai Consumer Staples Thai Beverages—Wineries & Distilleries
17 Central Pattana Public Company Ltd $7.51 B Thailand Thai Real Estate Thai Real Estate—Diversified
18 Thai Airways International Public Company Ltd $7.50 B Thailand Thai Industrials Thai Airlines
19 TMB Bank Public Company Ltd $7.18 B Thailand Thai Financials Thai Banks—Regional
20 The Siam Cement Public Company Ltd $6.87 B Thailand Thai Basic Materials Thai Specialty Chemicals
21 Bank of Ayudhya Public Company Ltd $5.74 B Thailand Thai Financials Thai Banks—Regional
22 Charoen Pokphand Foods Public Company Ltd $5.08 B Thailand Thai Consumer Staples Thai Farm Products
23 PTT Oil and Retail Business Public Company Ltd $5.04 B Thailand Thai Energy Thai Oil & Gas Refining & Marketing
24 Minor International Public Company Ltd $4.32 B Thailand Thai Consumer Discretionary Thai Lodging
25 Bumrungrad Hospital Public Company Ltd $4.04 B Thailand Thai Healthcare Thai Medical Care Facilities
26 Central Retail Corp Public Company Ltd $3.62 B Thailand Thai Consumer Discretionary Thai Department Stores
27 Global Power Synergy Public Company Ltd $3.06 B Thailand Thai Utilities Thai Utilities—Regulated Electric
28 PTT Global Chemical Public Company Ltd $2.86 B Thailand Thai Basic Materials Thai Chemicals
29 TISCO Financial Group Public Company Ltd $2.72 B Thailand Thai Financials Thai Banks—Regional
30 Indorama Ventures Public Company Ltd $2.71 B Thailand Thai Basic Materials Thai Chemicals

Top Companies from Thailand as of Jan. 01, 2026

1. Delta Electronics

Company Profile: Delta Electronics
Market Cap (USD): $76.00 B
Country: Thailand
Sector: Thai Industrials
Industry: Thai Electrical Equipment & Parts

2. Advanced Info Service PCL

Company Profile: Advanced Info Service PCL
Market Cap (USD): $28.79 B
Country: Thailand
Sector: Thai Communication Services
Industry: Thai Telecom Services

3. PTT PCL

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

4. Airports of Thailand Public Company Ltd

Company Profile: Airports of Thailand Public Company Ltd
Market Cap (USD): $24.03 B
Country: Thailand
Sector: Thai Industrials
Industry: Thai Airports & Air Services

5. 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

6. Kasikornbank Public Company Ltd

Company Profile: Kasikornbank Public Company Ltd
Market Cap (USD): $14.40 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

7. The Siam Commercial Bank Public Company Ltd

Company Profile: The Siam Commercial Bank Public Company Ltd
Market Cap (USD): $14.05 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

8. 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

9. Krung Thai Bank PCL

Company Profile: Krung Thai Bank PCL
Market Cap (USD): $12.64 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

10. True Corp Public Company Ltd

Company Profile: True Corp Public Company Ltd
Market Cap (USD): $12.28 B
Country: Thailand
Sector: Thai Communication Services
Industry: Thai Telecom Services

11. CP ALL Public Company Ltd

Company Profile: CP ALL Public Company Ltd
Market Cap (USD): $12.24 B
Country: Thailand
Sector: Thai Consumer Staples
Industry: Thai Grocery Stores

12. Siam Makro Public Company Ltd

Company Profile: Siam Makro Public Company Ltd
Market Cap (USD): $10.74 B (July 1, 2023)
Country: Thailand
Sector: Thai Consumer Discretionary
Industry: Thai Department Stores

13. Bangkok Bank Public Company Ltd

Company Profile: Bangkok Bank Public Company Ltd
Market Cap (USD): $9.99 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

14. Bangkok Dusit Medical Services Public Company Ltd

Company Profile: Bangkok Dusit Medical Services Public Company Ltd
Market Cap (USD): $9.53 B
Country: Thailand
Sector: Thai Healthcare
Industry: Thai Medical Care Facilities

15. Intouch Holdings Public Company Ltd

Company Profile: Intouch Holdings Public Company Ltd
Market Cap (USD): $9.39 B (Jan. 1, 2025)
Country: Thailand
Sector: Thai Communication Services
Industry: Thai Telecom Services

16. Thai Beverage Public Company Ltd

Company Profile: Thai Beverage Public Company Ltd
Market Cap (USD): $9.10 B
Country: Thailand
Sector: Thai Consumer Staples
Industry: Thai Beverages—Wineries & Distilleries

17. Central Pattana Public Company Ltd

Company Profile: Central Pattana Public Company Ltd
Market Cap (USD): $7.51 B
Country: Thailand
Sector: Thai Real Estate
Industry: Thai Real Estate—Diversified

18. Thai Airways International Public Company Ltd

Company Profile: Thai Airways International Public Company Ltd
Market Cap (USD): $7.50 B
Country: Thailand
Sector: Thai Industrials
Industry: Thai Airlines

19. TMB Bank Public Company Ltd

Company Profile: TMB Bank Public Company Ltd
Market Cap (USD): $7.18 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

20. The Siam Cement Public Company Ltd

Company Profile: The Siam Cement Public Company Ltd
Market Cap (USD): $6.87 B
Country: Thailand
Sector: Thai Basic Materials
Industry: Thai Specialty Chemicals

21. Bank of Ayudhya Public Company Ltd

Company Profile: Bank of Ayudhya Public Company Ltd
Market Cap (USD): $5.74 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

22. Charoen Pokphand Foods Public Company Ltd

Company Profile: Charoen Pokphand Foods Public Company Ltd
Market Cap (USD): $5.08 B
Country: Thailand
Sector: Thai Consumer Staples
Industry: Thai Farm Products

23. 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

24. Minor International Public Company Ltd

Company Profile: Minor International Public Company Ltd
Market Cap (USD): $4.32 B
Country: Thailand
Sector: Thai Consumer Discretionary
Industry: Thai Lodging

25. Bumrungrad Hospital Public Company Ltd

Company Profile: Bumrungrad Hospital Public Company Ltd
Market Cap (USD): $4.04 B
Country: Thailand
Sector: Thai Healthcare
Industry: Thai Medical Care Facilities

26. Central Retail Corp Public Company Ltd

Company Profile: Central Retail Corp Public Company Ltd
Market Cap (USD): $3.62 B
Country: Thailand
Sector: Thai Consumer Discretionary
Industry: Thai Department Stores

27. 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

28. PTT Global Chemical Public Company Ltd

Company Profile: PTT Global Chemical Public Company Ltd
Market Cap (USD): $2.86 B
Country: Thailand
Sector: Thai Basic Materials
Industry: Thai Chemicals

29. TISCO Financial Group Public Company Ltd

Company Profile: TISCO Financial Group Public Company Ltd
Market Cap (USD): $2.72 B
Country: Thailand
Sector: Thai Financials
Industry: Thai Banks—Regional

30. Indorama Ventures Public Company Ltd

Company Profile: Indorama Ventures Public Company Ltd
Market Cap (USD): $2.71 B
Country: Thailand
Sector: Thai Basic Materials
Industry: Thai Chemicals

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