Major Shareholders
List of Major Shareholders as of 31 August 2011
| No. | Name | Number of Share | % of Total Shares |
| 1 | PTT Public Company Limited |
746,461,262 | 49.142% |
| 2 | Thai NVDR Company Limited | 67,400,716 | 4.437% |
| 3 | HSBC (SINGAPORE) NOMINEES PTE LTD | 56,652,521 | 3.730% |
| 4 | HMC Polymers Company Limited | 42,132,567 | 2.774% |
| 5 | The Siam Cement Group | 41,494,227 | 2.732% |
| 6 | STATE STREET BANK EUROPE LIMITED | 25,409,237 | 1.673% |
| 7 | THE BANK OF NEW YORK MELLON-CGT TAXABLE | 21,964,800 | 1.446% |
| 8 | Bangkok Synthetics Co., Ltd. | 21,928,254 | 1.444% |
| 9 | NORTRUST NOMINEES LTD. | 20,189,594 | 1.329% |
| 10 | CHASE NOMINEES LIMITED 1 | 17,176,535 | 1.131% |
| 11 | STATE STREET BANK AND TRUST COMPANY | 16,334,549 | 1.075% |
| 12 | STATE STREET BANK AND TRUST COMPANY FOR AUSTRALIA | 13,574,532 | 0.894% |
| 13 | THE BANK OF NEW YORK (NOMINEES) LIMITED | 10,678,332 | 0.703% |
| 14 | THE BANK OF NEW YORK MELLON | 9,279,600 | 0.611% |
| 15 | NORBAX INC.,13 | 8,636,053 | 0.569% |
| Total Shares | 1,1119,312,779 | 73.690% |