The top 10 shareholders of PTT Global Chemical as of 3 September 2018
| Top 10 Shareholders | # of Shares | % Holding | |
| 1. | PTT Public Company Limited | 2,172,460,915 | 48.18 |
| 2. | Thai NVDR Company Limited 1 | 583,667,306 | 12.94 |
| 3. | STATE STREET EUROPE LIMITED | 138,178,614 | 3.06 |
| 4. | SOUTH EAST ASIA UK (TYPE C) NOMINEES LIMITED | 85,592,246 | 1.90 |
| 5. | HMC Polymers Company Limited 2 | 83,427,636 | 1.85 |
| 6. | Social Security Office | 53,257,051 | 1.18 |
| 7. | NORTRUST NOMINEES LIMITED-NT0 SEC LENDING THAILAND CL AC | 46,513,154 | 1.03 |
| 8. | Bangkok Synthetics Company Limited | 43,420,625 | 0.96 |
| 9. | STATE STREET BANK AND TRUST COMPANY | 39,050,450 | 0.87 |
| 10. | SE ASIA (TYPE B) NOMINEES LLC | 33,526,828 | 0.74 |
Remarks:
- Shareholders of Thai NVDR Company Limited holding Non-Voting Depository Receipt: NVDR, are ineligible for voting at shareholder's meeting except when exercising their voting rights on delisting the shares form SET.
- PTTGC holds 41.44% of HMC Polymers Company Limited.