Issuer Flash: Thai Oil Public Company Limited

Report date: 2026-09-02 Event date: 2026-08-13 Event title: Q2 and H1 2026 Results

1. Flash Conclusion

Thai Oil's Q2/2026 results confirm the central credit caution in the May issuer summary and Q1 flash: a refiner can report very strong underlying product margins while still experiencing a sharp reversal in headline earnings and cash conversion when crude prices move against inventory and hedges. Gross integrated margin (GIM) excluding stock gain/loss rose to USD23.9/bbl from USD14.8/bbl in Q1, and refinery margin rose to USD21.2/bbl from USD12.6/bbl. A THB10.741bn stock loss and a THB6.476bn realised commodity-hedging loss reduced Q2 reported EBITDA to THB8.915bn from THB31.641bn in Q1. Separately, the disclosed H1 operating-cash-flow outflow of THB8.992bn principally reflected a THB53.260bn increase in working capital and THB1.921bn of income-tax payments.

The result does not change the view of Thai Oil as a strategically important but cyclical PTT Group downstream credit. It shows that the group can materially diversify its crude slate and keep the refinery running during disruption: Middle East crude declined to 59% of Q2 intake from 91% in Q1, while refinery throughput remained 107% of nameplate capacity. That flexibility does not remove exposure to crude premiums, inventory volatility, freight and working-capital pressure.

At 30 June, lower debt and higher reported equity partly offset lower cash and negative operating cash flow. The group reported cash, cash equivalents and short-term investments of THB47.964bn, net debt/equity of 0.3x and a current ratio of 1.6x. These metrics should be read alongside a 0.9x quick ratio, THB9.734bn of Oil Fuel Fund receivables and the continuing capital requirements of the Clean Fuel Project (CFP). For bondholders, the next test is not simply whether Q3 product cracks remain favourable; it is whether strong underlying margins convert into cash after crude procurement, inventory movements, policy-related receivables and CFP expenditure.

2. What Was Announced

Thai Oil released reviewed Q2/2026 financial statements and its Q2 MD&A on 13 August 2026. Consolidated sales revenue increased to THB129.709bn in Q2 from THB114.809bn in Q1. Integrated intake decreased to 296 thousand barrels per day (kbd) from 314 kbd, partly because of the scheduled June turnaround of Crude Distillation Unit 1. Refinery throughput was nevertheless 107% of the 275 kbd nameplate capacity.

The underlying margin disclosure was strong. GIM excluding stock gain/loss was USD23.9/bbl, 9.1/bbl higher than in Q1, reflecting wider refined-product spreads, particularly for jet fuel/kerosene and diesel. Refinery margin was USD21.2/bbl.

The same quarter illustrates why the margin measures cannot be read in isolation. Crude prices declined sharply in June and Thai Oil recorded a THB10.741bn stock loss, equivalent to USD12.2/bbl, and a THB6.476bn realised commodity-hedging loss. Q2 EBITDA was THB8.915bn and net profit THB8.284bn. H1 EBITDA and net profit of THB40.555bn and THB27.765bn include the Q1 stock gain of THB22.557bn and are not a recurring run rate.

Middle East crude accounted for 59% of Q2 intake, down from 91% in Q1; Africa and the Americas accounted for 32%, domestic sources 7% and the Far East 2%. Thai Oil expects Middle East supply to account for 71% of Q3 intake and Africa and the Americas for 24%, subject to market conditions.

3. Credit Read-Through

The Q2 result supports a more nuanced reading of the prior crude-sourcing concern. The company did not report a supply interruption or a material utilisation collapse; it shifted its crude slate and maintained high operating rates. This reduces the immediate physical-risk interpretation of the Q1 91% Middle East sourcing share. It does not establish that alternative supply is cost-neutral or sustainably available. The MD&A does not provide a grade-by-grade comparison of landed cost, freight, insurance, product yield or working-capital intensity. In a prolonged disruption, those variables remain relevant to earnings quality and liquidity.

The financial result also confirms that the Q1 inventory benefit was reversible. Underlying product cracks widened, but the June price decline turned inventory exposure into a large stock loss. This timing sensitivity remains material for creditors because price and inventory movements can make reported earnings diverge sharply from underlying product margins. The realised commodity-hedging loss adds to the importance of assessing margins after inventory and hedging effects, rather than relying on either headline profit or a single gross-margin indicator.

Liquidity remains manageable on the disclosed figures, but more sensitive than the Q1 headline profit suggested. Cash, cash equivalents and short-term investments declined by THB20.637bn from year-end to THB47.964bn. H1 operating cash flow was an outflow of THB8.992bn because the reported THB35.960bn profit before tax and non-cash adjustments were more than offset by a THB53.260bn increase in working capital and THB1.921bn of income-tax payments. The balance sheet also included higher inventory and Oil Fuel Fund receivables; the latter were THB9.734bn at 30 June. The Q2 MD&A also identifies the government-approved April-May reduction in ex-refinery diesel prices as a factor that affected the group's operating cash flow and revenue; the disclosure does not provide the detailed cash-flow bridge needed to attribute the H1 outflow to that policy measure alone.

There are offsetting factors. Long-term borrowings and debentures fell to THB98.469bn from THB113.157bn at year-end, and total equity rose to THB243.408bn, including THB19.425bn of subordinated perpetual debentures classified as equity. The PTT inter-company borrowing limit was increased to THB20bn effective 2 June. This supports liquidity-management flexibility, but is not an explicit guarantee of Thai Oil or TTC bonds.

CFP remains the main structural execution and funding constraint. Thai Oil reiterates a planned Q3 2028 completion and an approved 2026-29 CFP budget of USD1.703bn; total approved CFP investment remains approximately THB241.472bn. The disclosure does not demonstrate that construction and commissioning risks have disappeared.

4. Key Numbers

Source: Thai Oil Q2/2026 MD&A, 13 August 2026. Amounts are consolidated unless otherwise indicated.

5. What To Watch Next

• Whether Q3 margins remain strong after crude premiums, freight, insurance and policy measures, rather than only at the level of headline product cracks.
• The realised effect of the planned Q3 crude slate and whether the return to a higher Middle East share changes cost, supply or inventory risk.
• Inventory normalisation, the collection timing of Oil Fuel Fund receivables, operating cash flow and the utilisation of available liquidity facilities.
• Further details on CFP engineering, procurement, construction management, capex and completion timing. The company continues to target Q3 2028.
• Original rating-agency releases and bond documentation, including the terms of Thai Oil, TTC and subordinated perpetual instruments, before making rating-sensitive or security-specific conclusions.

6. Sources

• Thai Oil Public Company Limited, Management's Discussion and Analysis for the Second Quarter of 2026, 13 August 2026: https://core.shareinvestor.app/storage/downloads/top/mdna/20260813-top-mdna-2q2026-en.pdf. Used for earnings, margins, crude sourcing, cash flow, liquidity, PTT liquidity arrangement and CFP information.
• Thai Oil Investor Relations, Financial Statements and MD&A, accessed 2 September 2026: https://investor.thaioilgroup.com/en/downloads/financial-statements-and-mda. Used to confirm the official Q2 financial-statements and MD&A route.
• Thai Oil Investor Relations, SET Announcements, accessed 2 September 2026: https://investor.thaioilgroup.com/en/newsroom/set-announcements. Used to confirm the 13 August 2026 release date.
• issuer_summary/issuers/thai_oil/current/thai_oil_issuer_summary_20260512.md and issuer_summary/issuers/thai_oil/current/thai_oil_issuer_flash_q1_2026_results_20260514.md. Used solely for comparison with the prior credit view and monitoring items.