# Sumitomo Chemical to acquire 20% stake in Prime Polymer in polyolefin integration

Sumitomo Chemical entered into an absorption-type company split agreement to transfer its polypropylene and LLDPE businesses in Japan to Prime Polymer, in exchange for a 20% equity stake in Prime Polymer, as part of a two-phase integration.

- Type: Acquisition
- Announced: 2026-04-07
- Where: Japan
- Status: announced
- Products: polypropylene, linear low-density polyethylene
- Sectors: [Plastics and Polymers](https://endata.com/sectors/plastics-polymers.md)

## Companies

- [Idemitsu Kosan](https://endata.com/companies/19808.md) (partner)
- [Mitsui Chemicals](https://endata.com/companies/19809.md) (partner)
- [Sumitomo Chemical](https://endata.com/companies/20503.md) (acquirer)
- [Prime Polymer](https://endata.com/companies/31997.md) (target)

## Sources

- [specialchem.com](https://www.specialchem.com/plastics/news/sumitomo-chemical-begins-phase-one-of-polyolefin-business-split), 2026-04-07: "Sumitomo Chemical will acquire equity shares representing a 20% stake in Prime Polymer."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.