Forbes Largest 2000 public companies of the world are ranked on the basis of various parameters like score for the sales and profits, assets and the market value and some normalcy conditions.
Here the companies are shown country wise along with its industry types which are as follows:
| Name of the company | Industry Type |
| PTT Public Company | Oil & gas operations |
| Siam Cement | Construction |
| Bangkok Bank | Banking |
| Kasikornbank | Banking |
| Siam Commercial Bank | Banking |
| Krung-Thai Bank | Banking |
| Thai Oil | Oil & gas operations |
| Advanced Info Service | Telecommunications services |
| Thai Petrochemical Ind | Chemicals |
| TMB Bank | Banking |
| Siam City Bank | Banking |
| Thai Airways Intl | Transportation |
| Bank of Ayudhya | Banking |
