Siam Cement Group (SCG)
Thailand's largest cement, chemicals and packaging conglomerate, founded 1913.
On the record
Checkpoint: SCGC-PTT Global Chemical olefins JV feasibility outcome and Q3 earnings update
The call
SCG's political standing and physical assets keep it entrenched, while its petrochemical arm, especially the Long Son Vietnam complex, remains the shakiest part of the group.
Siam Cement Group makes cement, chemicals, and packaging across Thailand and Southeast Asia. The cement business is hard to compete with because the company owns land, has government permits, and controls distribution networks, plus it has royal family ownership that keeps regulators friendly and new rivals out. However, the chemicals side, especially a big factory in Vietnam called Long Son, loses money unpredictably because chemical prices swing up and down wildly, and the company has sometimes spent carelessly on upgrades. The one thing that could fix this: if the Long Son factory finishes a major upgrade in late 2027 and starts running smoothly, or if the company teams up with a Thai energy company to run chemicals together, earnings could become much steadier and more trustworthy.
Why
01
AI pressure: None apparent. AI tools could optimize plant output or logistics, but nothing threatens cement, chemicals or packaging demand directly. Could AI do the core job? Unlikely.
02
Bigger players: PTT Global Chemical (GC), Chinese olefins exporters, Siam City Cement. SCGC is in feasibility talks with GC on an olefins joint venture while Chinese oversupply and cheap Middle East feedstock squeeze its petrochemical margins. Could a giant copy it? No, they are blocked.
03
What protects it. Royal ownership near 30%, century-old land concessions, permits and distribution give political cover and market access rivals can't easily replicate.
What would change this call
SCGC-PTT Global Chemical olefins JV feasibility outcome due Q3 2026. Shows whether SCG can offload petrochemical risk via partnership or must carry it alone.
Long Son Vietnam ethane-upgrade completion trajectory toward end-2027 target. Indicates whether LSP stabilizes or remains a stranded, cash-draining asset.
Q3 2026 earnings update and any change to H1 2026 dividend of THB 3.50/share. Reveals whether petrochemical volatility is spilling into cash returns to shareholders.
Long Son Vietnam ethane-upgrade completion trajectory toward end-2027 target. Indicates whether LSP stabilizes or remains a stranded, cash-draining asset.
Q3 2026 earnings update and any change to H1 2026 dividend of THB 3.50/share. Reveals whether petrochemical volatility is spilling into cash returns to shareholders.
Key numbers
- H1 2026 revenue THB 259.57 billion
- Q2 2026 net profit THB 11.53B, beat estimates
- SCGP Q2 2026 net profit up 128% YoY
Named risks
- Long Son Petrochemicals repeated shutdowns and restarts through 2024-2026 signal capital discipline strain.
- Hormuz Strait disruption cut roughly 50% of Asia feedstock supply, forcing emergency force majeure at ROC plant, March 2026.
- Petrochemical oversupply from China and Middle East pressuring SCGC margins.
- Analyst rating dispersion in July 2026 (upgrades and downgrades within same week) signals uncertain near-term trajectory.
- Headcount figures conflict across sources (32k to 56k), complicating workforce-trend assessment.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Siam City Cement (SCCC) | contesting | Domestic cement market shares within a few percentage points of each other, 2023-2024 (vendor-claimed). |
| PTT Global Chemical (GC) | contesting | SCGC in olefins/polyolefins JV feasibility talks with GC, update expected Q3 2026. |
| Holcim | gaining on | Holcim divested its 27.5% Siam City Cement stake in 2015, ceding ground to SCG. |
| TPI Polene / Asia Cement | contesting | Named as domestic Thai cement competitors in 2024 industry research (vendor-claimed). |
Questions people ask
- Is Siam Cement Group (SCG) profitable in 2026?
- Yes. SCG posted H1 2026 net profit of THB 17.76 billion on revenue of THB 259.57 billion, and Q2 2026 net profit of THB 11.53 billion beat consensus estimates of ~THB 8.15 billion, per July 2026 filings.
- Who owns Siam Cement Group?
- SCG (SET ticker SCC) is publicly listed with a market cap of roughly THB 291.6 billion as of 2 July 2026. Thai King Maha Vajiralongkorn holds about 30% of shares following a 2017-2018 Crown Property Bureau restructuring.
- Could AI replace Siam Cement Group's business?
- No. SCG's core is physical: cement kilns, petrochemical crackers, land concessions and distribution networks across Thailand and Vietnam. It deploys AI as a cost/efficiency tool, signing an MOU with FPT Corporation on 1 June 2026 for AI-driven ERP and operations, not as a replacement for manufacturing.
- Is SCG's petrochemical business struggling?
- Yes. The $5.4 billion Long Son Petrochemicals complex in Vietnam suspended operations in October 2024 after 15 days, restarted August 2025, then shut again in May 2026 for a $500 million ethane upgrade targeted for completion end-2027, after SCGC losses of about THB 10.27 billion in 2024.
- Who is SCG's biggest competitor?
- Domestically, Siam City Cement (SCCC) is SCG's closest cement rival with market share oscillating within a few percentage points as of 2023-2024. In petrochemicals, PTT Global Chemical (GC) is now in feasibility talks with SCGC on an olefins joint venture, expected update Q3 2026.
- Will SCG's Long Son Petrochemicals plant in Vietnam recover?
- SCG targets completion of a $500 million ethane feedstock upgrade at Long Son by end-2027, after the plant was shut in May 2026 following an August 2025 restart. Recovery depends on this upgrade and broader petrochemical spreads, per April 2026 ICIS reporting.
Timeline
- 2026-07-24H1 2026 Adjusted Cash EBITDA rises 35% YoY to THB 42.913 billion
- 2026-07-23SCG Q2 2026 earnings call cites 'daily war room' amid Hormuz Strait feedstock disruption
- 2026-07-22Q2 2026 net profit hits THB 11.53 billion, beating consensus of THB 8.15 billion
- 2026-07-01SCG merges Cement, Green Solutions, Smart Living and Distribution into one unit
- 2026-06-01SCG signs MOU with FPT Corporation for AI-driven ERP and industrial transformation
- 2026-05Long Son Petrochemicals (LSP) shut again for $500 million ethane upgrade
- 2026-03-09Force majeure declared at ROC plant amid Middle East feedstock disruption
- 2026-01-29Management unveils 2026 target: 1-3% revenue growth, surpass THB 500 billion
- 2025-12-09SCGP completes 100% acquisition of MYPAK (Indonesia)
- 2025-08-21Long Son Petrochemicals restarts after 10-month suspension
Revision history
25 July 2026
First assessed. Defensible for now. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Siam Cement Group
- SCC) Stock Price & Overview
- Thai royal wealth now in king's hands (2018-06-17)
- SCG Unveils Plan to Overcome Challenges... (2026-01-29)
- Siam Cement (SCC) Earnings... (2026-07-22)
- SCG Wages "Daily War" to Tame a Volatile World (2026-07-23)
- SCC H1/2026 Adjusted Cash EBITDA Up 35%... (2026-07-24)
- SCGP Reports Three-Digit Profit Growth in 2Q26... (2026-07-21)
- Vietnam's LSP ethane project over 50% complete... (2026-04-30)
- SCG-backed $5.4 bln petrochemical complex... (2025-07-20)
- SCG-backed $5.4 bln petrochemical complex restarts... (2025-08-21)
- Employee Count & Headcount Data (2026-06-29)