BHP Group Silver Stream at Antamina: $4.3bn Deal Signals Shift in Mining Finance

Andes Silver Monetisation Signals Shift in Mining Finance

BHP subsidiary agrees long-term silver stream at Antamina

BHP Group’s wholly owned subsidiary is entering a definitive silver streaming agreement that transfers 33.75% of Antamina’s payable silver to Wheaton Precious Metals International Ltd., marking a notable use of streaming to monetise a base‑metal asset. The Silver Stream is effective April 1, 2026 and requires Wheaton to pay $4.3 billion in upfront cash on closing for deliveries until a cumulative 100 million ounces of silver are supplied, after which Wheaton purchases 22.5% of payable silver for the life of mine. Payable silver is calculated using a fixed payable factor of 90.0%.

The transaction highlights a deliberate choice by one of the world’s largest miners to convert a portion of future metal production into immediate capital while retaining operating control of the mine. BHP’s agreement to monetise its silver portion through a streaming structure underscores an industry pivot toward alternative financing and risk‑sharing arrangements that preserve operating capacity and free up balance sheet resources. The move also demonstrates how major producers use contracting with streaming firms to optimise portfolio cash flows without selling producing assets.

Antamina’s scale and low unit costs make it an attractive candidate for streaming, and BHP frames the deal as compatible with consortium governance and long‑term development plans. Antamina, a large high‑grade copper‑zinc‑silver mine in Peru, operates under a multi‑company consortium; the stream maintains that consortium relationships and commits parties to responsible development. Executives from Wheaton and BHP emphasise the stream’s alignment with sustained operations and stakeholder commitments in Peru, noting it supports durable project economics while enabling value extraction through non‑traditional financing.

Wheaton increases silver exposure, immediate production impact

For Wheaton, the acquisition doubles its entitlement at Antamina from 33.75% under an existing Glencore stream to a combined 67.5%, immediately boosting production and operating cash flow. Company management calls Antamina a proven, long‑life, low‑cost operation that strengthens Wheaton’s position among the world’s largest silver producers.

Market and industrial context

Industry participants say quality silver is becoming harder to source even as demand for industrial applications and safe‑haven uses rises, making streams attractive for firms seeking predictable metal supplies. The deal is presented as mutually beneficial: BHP monetises non‑core metal upside while Wheaton secures a durable supply stream that supports near‑term cash flow and long‑term production visibility.