| GRI Standards | Required Data | Unit | Data Collection Period |
| | | | 2021 | 2022 | 2023 |
| GRI: 102 | Suppliers | | | | |
| 102-9 | Total Tier 1 suppliers | Absolute number of suppliers | 1,965 | 1,922 | 2,238 |
| | Critical tier 1 suppliers | Absolute number of suppliers | 35 | 24 | 23 |
| | Share of total procurement spent on Critical tier 1 suppliers | % of total procurement spent | 35 | 37 | 41 |
| - | Tier 1 Supplier by Category | | | | |
| | Drilling Services | Absolute number of suppliers | 53 | 80 | 60 |
| | Well Services | Absolute number of suppliers | 29 | 33 | 32 |
| | Exploration and Production | Absolute number of suppliers | 73 | 56 | 72 |
| | Construction and Engineering | Absolute number of suppliers | 79 | 81 | 96 |
| | Maintenance | Absolute number of suppliers | 163 | 174 | 173 |
| | Logistics | Absolute number of suppliers | 101 | 95 | 211 |
| | ICT Services and Supply | Absolute number of suppliers | 168 | 190 | 222 |
| | Office Facility/Indirect Services | Absolute number of suppliers | 470 | 593 | 752 |
| | Materials | Absolute number of suppliers | 830 | 619 | 620 |
| 102-9 | Critical non-tier 1 suppliers | Absolute number of suppliers | 104 | 64 | 75 |
| GRI: 102 | Supplier Assessment | | | | |
| 102-9 | Number of tier 1 suppliers assessed in the last 3 years | Absolute number of tier 1 suppliers | 1,965 | 1,922 | 2,238 |
| | Percentage of tier 1 suppliers assessed in the last 3 years | % of tier 1 suppliers assessed against total tier 1 suppliers | 100 | 100 | 100 |
| | Number of critical non-tier 1 suppliers assessed in the last 3 years | Absolute number of critical non-tier 1 suppliers assessed | 104 | 64 | 75 |
| | Percentage of critical non-tier 1 suppliers assessed in the last 3 years agate | % of critical non-tier 1 suppliers assessed against total critical non-tier 1 suppliers | 100 | 100 | 100 |
| GRI: 308, 414 | Supplier ESG Management | | | | |
| 308-1, 414-1 | New suppliers screening using ESG criteria | % | 100 | 100 | 100 |
| - | Weight of ESG in overall assessment of suppliers selection | % | 67 | 67 | 67 |
| | Total suppliers classified as sustainability high-risk | Absolute number of sustainability high-risk suppliers | 49 | 45 | 40 |
| | Number of tier 1 supplier classified as sustainability high-risk | Absolute number of tier 1 sustainability high-risk suppliers | 13 | 19 | 11 |
| | Percentage of tier 1 supplier classified as sustainability high-risk | % of tier 1 sustainability high-risk suppliers against total tier 1 suppliers | 0.66 | 1 | 0.5 |
| | Number of critical non-tier 1 supplier classified as sustainability high-risk | Absolute number of critical non-tier 1 sustainability high-risk suppliers | 36 | 26 | 29 |
| | Percentage of critical non-tier 1 supplier classified as sustainability high-risk | % of critical non-tier 1 sustainability high-risk supplier against total critical non-tier1 | 35 | 41 | 39 |
| - | Supplier Audit | | | | |
| - | Percentage of critical (tier 1 and non-tier 1) suppliers audited annually | % of critical suppliers audited against total critical suppliers | 83 | 73 | 67 |
| | Percentage of critical (tier 1 and non-tier 1) suppliers audited once every 3 years | % of critical suppliers audited against total critical suppliers | 17 | 27 | 33 |
| | Percentage of suppliers with high sustainability risk audited annually | % of high risk suppliers audited against total high risk suppliers | 69 | 89 | 91 |
| | Percentage of suppliers with high sustainability risk audited every 3 years | % of high risk suppliers audited against total high risk suppliers | 31 | 11 | 9 |
| | Percentage of current high risk suppliers where gaps have been identified with corrective action plans | % corrective action plans (CAR) against total audit findings | 100 | 100 | 100 |
| | Percentage of current suppliers with corrective action plans that have improved their ESG performance within 12 months | % gap closed against total CAR | 100 | 100 | 100 |
| - | Supply Chain Spend Analysis | | | | |
| - | Total procurement value | Million USD | 1,120 | 1,719 | 2,347 |
| | Procurement Value by Category | | | | |
| | Drilling Services | Million USD | 173 | 345 | 545 |
| | Well Services | Million USD | 67 | 76 | 81 |
| | Exploration and Production | Million USD | 30 | 48 | 71 |
| | Construction and Engineering | Million USD | 276 | 304 | 491 |
| | Maintenance | Million USD | 56 | 79 | 116 |
| | Logistics | Million USD | 94 | 150 | 203 |
| | ICT Services and Supply | Million USD | 88 | 109 | 134 |
| | Office Facility/Indirect Services | Million USD | 68 | 92 | 93 |
| | Materials | Million USD | 269 | 516 | 613 |
| | Supply chain KPI1: An average percentage of contractors' KPIs which achieved targets To measure the efficiency and effectiveness of the contractor screening and selection (pre-award) as well as the contract management (post-award). The measurement can be done through the selected contractor's KPIs e.g. timely commencement/completion of services, SSHE performance, downtime, Service Level Agreement (SLA), ESG requirements etc. | % | 80 | 82 | 88 |
| | 2023 Target: 75% of total contractors | | | | |
| | Supply chain KPI2: # of contractors / suppliers non-compliance to PTTEP Management of Contractors & Suppliers requirements | Number | 0 | 0 | 0 |
| | 2023 Target: Less than 5 suppliers | | | | |
| | Supply chain KPI3: % of tier 1 supplier are assessed on ESG related risk for the last 3 years | % | 100 | 100 | 100 |
| | 2023 Target: 100% suppliers assessed against total tier 1 suppliers | | | | |
| - | Green Procurement | | | | |
| - | The value of Green Procurement: Thailand | Million USD | 480 (1) | 568 (1) | 955 (1) |
| | Percentage of the value of Green Procurement: Thailand | Compared to the total procurement value | 0.43 | 0.33 | 0.41 |
| GRI: 204 | Local Procurement | | | | |
| 204-1 | Thailand contractor/supplier | % | 67 | 73 | 78 |
