By Charles Pitts
The global rush for critical minerals has historically centered on the “big three”: lithium, copper, and nickel. However, as we move through 2026, a lesser-known metalloid has emerged as the linchpin of national security and industrial resilience. Antimony, often referred to as the “defense metal,” has transitioned from a niche industrial input to one of the most geopolitically sensitive commodities on the planet.
Following a series of aggressive export restrictions from China in late 2024 and early 2025, the antimony market entered 2026 characterized by structurally high prices and a desperate search for non-adversarial supply. With the U.S. Department of Defense (DoD) and the Defense Logistics Agency (DLA) aggressively stockpiling the material, the focus has shifted toward domestic projects, most notably Perpetua Resources’ Stibnite Gold Project in Idaho.
What is Antimony?
Antimony (Sb) is a silvery-gray, brittle metalloid that rarely occurs in nature in its elemental form. It is primarily extracted from the mineral stibnite. While it has limited utility on its own due to its brittleness, its properties as an alloying agent and chemical compound make it indispensable to modern technology.
In 2026, the primary industrial value of antimony lies in two sectors: flame retardants and metallurgy. When combined with halogens, antimony trioxide acts as a potent flame retardant for plastics, textiles, and electronics. This application remains the largest volume consumer of the metal globally. However, it is antimony’s role in lead-acid batteries and high-strength alloys that has captured the attention of military planners and renewable energy investors.
Why Antimony Matters for Defense in 2026
The designation of antimony as a “defense metal” is not hyperbole. It is a critical component in the production of munitions, where it is used to harden lead bullets and shrapnel. Furthermore, antimony is essential for the manufacture of primers, tracers, and precision-guided munitions.
Beyond the battlefield, antimony is a core component in the “hardened” electronics required for military hardware. From infrared sensors and night-vision goggles to the semiconductor materials used in advanced communication arrays, antimony’s chemical stability and heat resistance are vital.
The World Economic Forum recently noted that without a secure supply of antimony, military fire-suppression systems fail, vehicle wiring becomes a fire hazard, and precision electronics are exposed to devastating interference. For the United States, which currently lacks a primary domestic mine for antimony, this reliance represents a significant strategic vulnerability.
The Geopolitical Squeeze: China’s Dominance
The 2026 market landscape is defined by the fallout of China’s 2024 export controls. Historically, China has controlled over 50% of global mine production and a staggering 80% of refined antimony output. In August 2024, Beijing introduced restrictions on six types of antimony-related products, including ore, metal, and oxides.
These moves were widely interpreted as a response to U.S. restrictions on high-end semiconductors. By late 2025, the supply crunch sent prices soaring to nearly $50,000 per tonne, a ten-fold increase over the five-year average. While prices have moderated to approximately $29,000 per tonne in mid-2026, the market remains fragile.
As we have seen with antimony price trends and supply chain sieges, the weaponization of the supply chain has forced a rapid pivot toward “friend-shoring.” Tajikistan and Vietnam have increased exports to Western markets, but they remain insufficient to fill the gap left by the absence of Chinese supply.
Perpetua Resources and the Stibnite Solution
In the search for domestic supply, Perpetua Resources (NASDAQ: PPTA) has become the most watched company in the critical minerals sector. Their Stibnite Gold Project in Idaho is uniquely positioned as a potential “one-stop shop” for U.S. antimony.
The Stibnite site is a brownfield location that played a pivotal role during World War II, providing the majority of the antimony and tungsten used by the Allied forces. Decades later, Perpetua is working to redevelop the site as a modern, integrated gold and antimony operation.
Key Milestones at Stibnite:
- DoD Support: The U.S. Department of Defense has already awarded Perpetua over $80 million in grants to fast-track the environmental and engineering work necessary to bring the project online.
- J.P. Morgan Investment: In a rare move for a diversified financial institution, J.P. Morgan invested $75 million into the project under its Security and Resiliency Initiative, highlighting the metal’s importance to national infrastructure.
- Offtake Agreements: Perpetua has signed significant offtake agreements, including a deal with Ambri for the use of antimony in liquid metal batteries, a technology essential for long-duration grid energy storage.
While the project is currently in the late-stage permitting and EPCM (engineering, procurement, construction management) phase, it represents the only viable path to a large-scale, integrated U.S. supply of antimony concentrate and refined products.
2026 Antimony Market Data Points
To understand the scale of the supply-demand imbalance, consider the following estimates for the 2026 fiscal year:
| Metric | 2026 Forecast (Estimated) | Trend vs. 2024 |
|---|---|---|
| Global Mine Production | 85,000 Tonnes | Down 15% |
| U.S. Domestic Mine Production | 0 Tonnes | Stable (Zero) |
| Antimony Spot Price (Avg) | $29,500 / Tonne | Up 240% |
| Defense Sector Demand | 12,000 Tonnes | Up 45% |
| Global Refining Capacity (Ex-China) | 60,000 Tonnes | Underutilized |
The primary bottleneck in 2026 is not refining capacity, but rather the availability of concentrate. Outside of China, smelters are currently operating at reduced rates because they cannot source enough raw ore to meet demand. This is why projects like Stibnite are critical; they provide the “upstream” feed that the rest of the supply chain requires.
2026 Outlook and Investor Risks
As we look toward the remainder of 2026 and into 2027, the antimony market is expected to remain in a state of perpetual deficit. For mining professionals and critical mineral investors, several key factors will dictate the trajectory of the metal:
- Permitting Speed: The timeline for the Stibnite project remains the single most important variable for U.S. domestic supply. Any delays in the Record of Decision (ROD) or subsequent litigation will keep the U.S. dependent on foreign sources.
- Substitution Limits: While some manufacturers are attempting to substitute antimony in flame retardants with phosphorus-based compounds, the performance in defense and aerospace applications is often non-negotiable.
- Inventory Buildup: The DLA’s target of a $1 billion critical minerals stockpile will continue to provide a price floor for antimony, even if industrial demand from the consumer electronics sector softens.
- Geopolitical De-escalation: Should trade relations between the U.S. and China improve, a sudden lifting of export bans could lead to a sharp correction in prices. However, many analysts believe the “trust gap” is now too wide for western manufacturers to rely on Chinese supply again.
Conclusion
Antimony is no longer a “forgotten” mineral. In 2026, it is a strategic asset that sits at the intersection of defense policy, clean energy transition, and geopolitical maneuvering. As companies like Perpetua Resources move closer to production, the industry is watching closely to see if the West can successfully decouple its defense supply chain from adversarial control.
For operators and investors, the lesson of the 2024–2026 antimony squeeze is clear: in the modern industrial economy, the most critical minerals are often the ones you aren’t looking at until they disappear.
