Chemical
Sumitomo Chemical clears key regulatory hurdle for polyolefin business integration
The company announced that the Business Integration Agreement, Joint Venture Agreement, and the first-phase Absorption-Type Company Split Agreement became effective on July 1, 2026
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By ICN Bureau | July 01, 2026
Sumitomo Chemical said it has secured all required regulatory clearances for its planned integration of its polypropylene (PP) and linear low-density polyethylene (LLDPE) businesses in Japan with Prime Polymer Co, allowing the transaction to move into its next phase.
The company announced that the Business Integration Agreement, Joint Venture Agreement, and the first-phase Absorption-Type Company Split Agreement became effective on July 1, 2026, following the receipt of all necessary approvals under competition laws and other applicable regulations.
The transaction stems from agreements announced on December 24, 2025, under which Sumitomo Chemical will transfer its domestic PP and LLDPE businesses to Prime Polymer through a two-phase simple absorption-type company split. In return, Sumitomo Chemical will acquire an equity stake equivalent to 20% of Prime Polymer.
Prime Polymer is a joint venture between Mitsui Chemicals, Inc. and Idemitsu Kosan Co., Ltd.
As previously disclosed on April 1, 2026, Sumitomo Chemical and Prime Polymer executed the agreement covering the first phase of the company split. With regulatory approvals now complete, that agreement has officially taken effect alongside the broader business integration and joint venture arrangements.
The second phase of the restructuring remains on schedule. Sumitomo Chemical expects to approve and execute the Phase Two company split agreement in January 2027, with the transaction targeted to become effective on April 1, 2027.
The company said each phase of the restructuring qualifies as a simple absorption-type company split and is expected to reduce its total assets by less than 10% of net assets and its net sales by less than 3% compared with the previous fiscal year. As a result, certain disclosure items have been omitted in accordance with applicable disclosure requirements.
