Smurfit Westrock has agreed to acquire CMPC's Chilean containerboard and corrugated business, in a move that consolidates the merged packaging giant's position in the South American recovered fiber and board market.

The transaction is expected to close during the first half of 2027, according to the announcement. That timeline gives regulators in Chile and any other relevant jurisdictions a long review runway — and gives Smurfit Westrock more than a year to integrate planning before the assets change hands.

What is on the table

The deal covers CMPC's containerboard and corrugated operations in Chile. For Smurfit Westrock, the acquisition adds Chilean containerboard capacity and converting operations to a footprint that already spans Europe and the Americas following the 2024 combination of Smurfit Kappa and WestRock. For Chile's recovered paper market, the transaction shifts a significant share of domestic containerboard demand — and therefore demand for old corrugated containers (OCC) — into the hands of a single integrated producer.

Sellers rarely exit a national containerboard market by accident. CMPC, controlled by the Matte group through Empresas CMPC, has been reviewing its packaging portfolio, and the disposal concentrates the company on its pulp, tissue and paper businesses. Chilean containerboard capacity under a global multi-national owner typically means tighter links between domestic collection streams and export-scale paper machines.

Why fiber buyers should watch Chile

Chile's OCC and mixed paper flows have historically fed both domestic mills and export markets, with Asian buyers competing against local containerboard producers for recovered fiber. A single large integrated player controlling a larger share of Chilean containerboard capacity could redirect more of that fiber infeed inward, tightening the export balance.

The deal also extends a pattern. Since the Smurfit Kappa–WestRock merger closed, the combined group has moved to consolidate regional containerboard markets where fragmented capacity and growing e-commerce demand make scale economics compelling. Latin America, where containerboard demand growth continues to outpace mature markets, fits that thesis.

What happens next

The first half of 2027 close date is the milestone that decides everything else. Between now and then, expect Chilean competition authority review, possible conditions on corrugated market share, and — on closing — the real question for fiber market participants: whether Smurfit Westrock keeps the acquired mills' furnish strategies intact or re-optimizes recovered fiber sourcing across its regional system. Recyclers and brokers moving Chilean OCC should track the regulatory filings and any divestiture conditions attached to approval.