The partnership assigns a 44% stake to SCG Chemicals, a subsidiary of Siam Cement, while PTT Global Chemical retains the remaining majority interest. Executives anticipate the integration will yield annual benefits between 150 million and 200 million dollars, creating a more resilient entity capable of rivaling international producers.

Investors reacted sharply to the announcement on Thursday. Siam Cement shares dropped 4.7%, while PTT Global Chemical saw an 8.3% decline, marking its most significant single-day loss since April 2025. The transaction remains subject to shareholder and regulatory approvals, with completion targeted for the second half of next year.