By Penny Langford
Wheaton Precious Metals just secured a landmark US$4.3 billion silver streaming deal with BHP Group, transforming the future of mining finance. This record-setting transaction targets BHP’s 33.75% stake in Peru’s Antamina mine, reshaping capital strategies amid rising copper demand and elevated silver prices above US$80 per ounce.
This groundbreaking silver stream not only injects unprecedented liquidity into BHP’s balance sheet but also pioneers the “Negative Cash Cost” era. By monetizing silver byproducts, BHP strategically funds its copper expansion to address the looming 2026 copper deficit.
Inside the $4.3 Billion Silver Streaming Deal Between Wheaton and BHP
Wheaton’s subsidiary paid an upfront US$4.3 billion for exclusive rights to a substantial portion of silver from BHP’s Antamina share. The agreement features two phases: initially, Wheaton receives 33.75% of the payable silver until 100 million ounces are delivered.
- Phase One: Wheaton collects 33.75% of the payable silver until a total of 100 million ounces is reached.
- Phase Two: Post 100 million ounces, Wheaton’s entitlement drops to 22.5% for the mine’s remaining life.
The stream includes a fixed 90% payable factor for volume certainty. Wheaton pays BHP 20% of the spot silver price per ounce delivered, effectively purchasing silver at an 80% discount, while providing BHP immediate large-scale funding.
Why Antamina? A Tier-One Copper and Silver Powerhouse in Peru
Antamina stands as one of the world’s largest copper-zinc mines and a significant silver byproduct producer. Located in Peru’s Ancash region, its tier-one status and long-life asset profile make it a prime target for streaming investment.
Wheaton already held a silver stream on Antamina through Glencore, and this deal consolidates its position as a major non-operating partner. For BHP, streaming silver byproducts unlocks value from underused assets, especially as its 2026 capital focuses on copper and potash projects like Jansen and Chile expansions.
How This Deal Sets a New Standard for Mega-Project Mining Finance
Rising interest rates and volatile debt markets have shifted mega-project financing away from traditional bank loans. Streaming offers three key advantages:
- Capital Efficiency: BHP receives the full life-of-mine value of silver upfront instead of waiting decades.
- Non-Dilutive: The deal avoids equity dilution, preserving BHP’s capital structure.
- Risk Sharing: Wheaton assumes production risk; silver deliveries vary with mine output, unlike fixed debt repayments.
This streaming model is gaining traction industry-wide, shaping deals like SolGold’s Cascabel financing which blend royalties and streaming instead of conventional project funding.
2026 Precious Metals Streaming Sector: Where Wheaton-BHP Stands
The table below compares the Wheaton-BHP Antamina deal to historical and current 2026 sector averages, highlighting its scale and terms.
| Metric | Wheaton/BHP (Antamina) | Historical Average (Tier-1) | 2026 Sector Average |
|---|---|---|---|
| Upfront Payment | $4.3 Billion | $500 Million – $1.2 Billion | $850 Million |
| Ongoing Payment | 20% of Spot | 25% of Spot | 22.5% of Spot |
| Silver Price (2026) | $81.40/oz | $24.50/oz (2021-2024) | $78.90/oz |
| Asset Class | Tier-1 Copper/Zinc | Mixed Gold/Silver | Mid-Tier Poly-metallic |
| LOM Coverage | Phase-based (33.75%/22.5%) | Fixed (usually 15-25%) | Tiered |
How Streaming Creates “Negative Cash Cost” Advantages for BHP
What This Means for Investors: Wheaton’s Silver Streaming Masterstroke
Wheaton Precious Metals capitalized on strong silver prices near US$81.40 per ounce to secure favorable streaming terms with BHP. Paying just 20% of spot prices, Wheaton gains high-margin silver ounces and solidifies its position as a dominant streaming company, boosting production forecasts substantially over decades.
Who’s Following? The Future of Streaming Mega-Deals in 2026
The success of the Antamina deal is inspiring other major miners like Rio Tinto and Vale to explore streaming options for their byproduct metals. The “Silver Stream Paradigm” is proving essential as companies seek capital-efficient ways to fund large-scale projects while offering investors direct precious metals exposure.
This deal marks the moment streaming moved from niche junior financing to the centerpiece of mega-project capital during the mid-2020s, setting a new direction for mining’s financial future.
