Fitch Ratings (Thailand) has assigned a rating of ‘AA-(tha)’ to PTT Global Chemical Public Company Limited’s (PTTGC; BBB-/AA-(tha)/Negative) proposed senior unsecured debentures of up to THB17 billion.
The proposed debentures constitute direct, unsecured, unconditional and unsubordinated obligations of PTTGC, ranking pari passu with its other senior unsecured obligations. The debentures are therefore rated at the same level as PTTGC’s National Long- Term Rating of ‘AA-(tha)’. The proceeds will be used to refinance the company’s existing Thai baht senior unsecured debentures to smooth its debt maturity profile.
Key Rating Drivers
Volatile Industry: Fi tch expects the supply- demand imbalance in the global petrochemical market to persist through 2027, driven by capacity additions in Asia. Capacity cuts in the industry have not been fast enough to ease oversupply, although confirmed shutdowns in Korea and Japan represent early progress. New capacity additions in China continue to weigh on near-term spreads. Uncertainty in global trade policies also continues to delay a recovery in key end-market sectors.
Iran Conflict Boost: PTTGC’s EBITDA was THB13.6 billion in 1Q26, well ahead of Fitch’s THB22 billion full-year forecast run rate. The Iran conflict tightened regional supply, lifting gross refining margin (GRM) to USD16.7 per barrel (bbl) from USD7.9/bbl in 4Q25 and widening olefin and aromatics spreads. Earnings also benefited from lower ethane feedstock costs under a revised pricing contract with PTT and resumption of operations after a 4Q25 maintenance shutdown. Fitch expects these tailwinds to moderate in 2H26 as regional supply normalizes. Fitch’s rating case does not incorporate any conflict- driven windfall.
Deleveraging Risk: Fitch forecasts EBITDA net leverage at 4.4x-5.7x in 2026 and 2027 (2025: 10.5x; 1Q26: 5.3x), with a return to below the 4.0x negative rating threshold in 2028 at the earliest. Fitch expects deleveraging to be supported by improved operating performance, a gradual petrochemical market recovery from 2027, positive FCF and debt reduction via noncore asset disposal, although Fitch has not included all potential asset sales in its rating case. PTTGC faces negative rating action if the pace of deleveraging falls short or the asset sales do not proceed.
Debt Reduction Progress: PTTGC completed THB9 billion of asset sales in 1Q26, comprising the sale of shares in Thai Tank Terminal Company Limited and restructuring of jetty and buffer tank farm assets. Fitch’s rating case includes the THB9 billion of proceeds and THB1 billion of additional debt from the sale- and- leaseback arrangement.
In 2Q26, PTTGC undertook bond buybacks and prepayment of a subsidiary loan totaling about THB8 billion. These transactions are largely leverage-neutral but reduce interest expense and support cash flow available for debt servicing. PTTGC targets up to THB20 billion of additional non-core asset monetisation in 2026, which Fitch has not incorporated into its rating case; the remaining sales could improve leverage by 0.3x- 0.9x beyond Fitch’s rating case.
Parent Subsidiary Linkage: PTTGC’s rating incorporates a two-notch uplift from its ‘bb’/’a(tha)’ Standalone Credit Profile (SCP), reflecting Fitch’s assessment that parent PTT Public Company Limited (BBB+/ Negative and AAA(tha)/Stable) has ‘Medium’ strategic and operational incentives to support PTTGC, a strategically important subsidiary and major feedstock offtaker.
PTT’s support strengthened in 2026, with the extended trade credit facility for crude purchases increased to THB80 billion effective April 2026 from THB70 billion, and an intercompany loan facility expanded to THB20 billion effective May 2026 from THB10 billion.
SCG JV Event Risk: PTTGC and SCG Chemicals Public Company Limited signed a non-binding agreement on 29 April 2026 to explore combining their olefins and polyolefins businesses in Thailand. Fitch treats this as an event risk and excludes it from the rating case, as the structure, ownership split and financial implications for PTTGC have not been determined. Fitch will assess the credit impact if the joint venture is finalised in a manner that materially affects PTTGC ‘ s strategic role in the PTT group, following completion of the joint study currently expected in 3Q26.
Peer Analysis
PTTGC has a weaker business and financial profiles than that of Orbia Advance Corporation, S.A.B. de C.V. (BB+/Stable). Orbia benefits from backward integration and diversification across its PVC and fluoro products businesses. This supports higher margins than those of pure commodity chemical producers. As a result, Orbia is rated one notch above PTTGC’s SCP.
PTTGC’s business profile is slightly weaker than that of Alpek, S.A.B. de C.V. (BB+/Negative). Alpek has a leading market position in PTA, PET, rPET and expandable polystyrene in the Americas, while PTTGC is the leading petrochemical company in Southeast Asia. Alpek derives about 92% of its revenue from consumer end-markets, including in food, beverage and consumer staples, which supports more resilient demand. PTTGC’s acquisition of Allnex adds stability to earnings and lifts its consolidated EBITDA margin. However, Fitch rates Alpek one notch above PTTGC’s SCP to reflect Alpek’s stronger leverage profile.
Synthos Spolka Akcyjna (BB/Negative) has a weaker business profile than PTTGC, reflecting its smaller scale, lower diversification and weaker global product leadership, although its synthetic rubber segment is strengthening following the acquisition of assets from Trinseo PLC. Synthos’s stronger financial leverage than PTTGC offsets its weaker business profile, resulting in a rating in line with PTTGC’s SCP.
PTTGC has the strongest business profile and lowest financial leverage among Thai downstream oil and gas peers. The company has a larger operating scale, greater petrochemical integration and higher profitability than Thai Oil Public Company Limited (A+(tha)/Negative).
Fitch’s Key Rating-Case Assumptions
- Benchmark Brent crude price at USD87/bbl in 2026, USD65/bbl in 2027 and USD60/bbl in 2028 and thereafter, with PTTGC’s crude procurement costs adjusted for applicable premiums.
- Profitability of petrochemicals to remain weak in 2026 as new supply and weak demand pressure petrochemical spreads.
- Gross refining margin, excluding inventory gains/losses, of USD5.5/bbl in 2026 and 2027.
- Extension of credit terms on crude supply from PTT to continue in 2026-2027.
- Total capex and investment of around THB52 billion over 2026-2028.
- Dividend payment of THB0.5 per share in 2026 and 2027.
- Proportionate consolidation of subsidiary, HMC Polymers Company Limited (BBB-(tha)/Negative).
Corporate Rating Tool Inputs and Scores
Fitch scored the issuer as follows, using our Corporate Rating Tool (CRT) to produce the SCP:
- Business and financial profile factors (assessment, relative importance): management (bbb, lower), sector characteristics (bb+, moderate), market and competitive positioning (bbb-, moderate), diversification and asset quality (bb+, higher), company operational characteristics (bbb-, moderate), profitability (bb, moderate), financial structure (b+, higher), and financial flexibility (bb+, moderate).
- The quantitative financial subfactors are based on custom CRT financial period parameters: 15% weight for the forecast year 2026, 20% for the forecast year 2027, 30% for the forecast year 2028 and 35% for the forecast year 2029.
- The governance assessment of ‘Good’ results in no adjustment.
- The operating environment assessment of ‘bbb+’ results in no adjustment.
- The SCP is ‘bb’.
To derive the IDR:
Application of Fitch’s Parent and Subsidiary Linkage Rating Criteria results in a bottom-up +2 approach, resulting in an IDR of ‘BBB-‘
RATING SENSITIVITIES
Factors that Could, Individually or Collectively, Lead to Negative Rating Action/Downgrade:
- EBITDA net leverage not on a clear trajectory to fall below 4.0x by 2028, driven by persistently weak market conditions, delayed asset sales or significant deviation from PTTGC’s cost reduction plans within 12-18 months
- A perceived weakening of incentives for PTT to support PTTGC.
Factors that Could, Individually or Collectively, Lead to Positive Rating Action/Upgrade: - The Outlook could be revised to Stable if PTTGC’s EBITDA net leverage is better than the sensitivities for negative rating action.
Liquidity and Debt Structure
PTTGC had outstanding debt of THB156 billion at end-1Q26, with about THB11 billion due within 12 months. Liquidity is supported by unrestricted cash and current financial investments of THB57 billion at end-1Q26 and continued extension of crude payment terms with PTT. PTTGC has adequate debt market access from its close links with PTT and leading position in Thailand’s petrochemical business.
Issuer Profile
PTTGC is Thailand’s largest and fully integrated petrochemical and refining company. It had a combined petrochemical and chemical capacity of 14.3 million tonnes a year at end-2025 and crude oil and condensate distillation capacity of 280,000 bbl/day.
Date of Relevant Committee
05 March 2026
REFERENCES FOR SUBSTANTIALLY MATERIAL SOURCE CITED AS KEY DRIVER OF RATING
The principal sources of information used in the analysis are described in the Applicable Criteria.
Public Ratings with Credit Linkage to other ratings
PTTGC’s ratings incorporate a two-notch uplift from its SCP due to the ‘Medium’ support incentive from its parent, PTT.
MACROECONOMIC ASSUMPTIONS AND SECTOR FORECASTS
Click here to access Fitch’s latest quarterly Global Corporates Sector Forecasts Monitor data file which aggregates key data points used in our credit analysis. Fitch’s macroeconomic forecasts, commodity price assumptions, default rate forecasts, sector key performance indicators and sector-level forecasts are among the data items included.
Climate Vulnerability Signals
The results of our Climate.VS screener did not indicate an elevated risk for PTTGC.
The highest level of ESG credit relevance is a score of ‘3’, unless otherwise disclosed in this section. A score of ‘3’ means ESG issues are credit-neutral or have only a minimal credit impact on the entity, either due to their nature or the way in which they are being managed by the entity. Fitch’s ESG Relevance Scores are not inputs in the rating process; they are an observation on the relevance and materiality of ESG factors in the rating decision. For more information on Fitch’s ESG Relevance Scores, visit https://www.fitchratings.com/topics/esg/products#esg-relevance-scores.
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