- Integration of Sumitomo Chemical's polypropylene (PP) and linear low‑density polyethylene (LLDPE) businesses into Prime Polymer (PRM), the Mitsui–Idemitsu JV.
- Parties signed an MOU on Sept 10, 2025 and a definitive Business Integration Agreement on Dec 24, 2025.
- Japan Fair Trade Commission will not issue a cease-and-desist order; overseas competition reviews are ongoing and the integration will be implemented after their clearance.
Scope
Prime Polymer (PRM), the Mitsui–Idemitsu joint venture, will absorb Sumitomo Chemical’s polypropylene (PP) and linear low‑density polyethylene (LLDPE) businesses in Japan, covering polyolefin (PO) operations including PP and PE.
Agreements and timeline
The parties signed a memorandum of understanding on Sept 10, 2025, and concluded a definitive Business Integration Agreement and a joint venture agreement on Dec 24, 2025.
Regulatory status
PRM and Sumitomo Chemical filed a merger notification with the Japan Fair Trade Commission under the Anti‑Monopoly Act; the JFTC notified it will not issue a cease‑and‑desist order, while overseas competition reviews remain ongoing.
Next steps
The integration is scheduled to proceed after completion of remaining foreign antitrust clearances; timing and implementation depend on those regulatory approvals.
