On April 20, 2026, USA Rare Earth (Nasdaq: USAR) put $300 million in cash and 126.849 million shares on the table for 100 percent of Serra Verde Group, the operator of Brazil’s Pela Ema mine in Goiás. At USAR’s April 17, 2026 closing price of $19.95, that equity value lands at roughly $2.8 billion. The combined company will hold the only producing rare earth asset outside Asia that delivers all four magnetic elements at scale, plus a $565 million DFC financing package and a 15-year, 100 percent offtake to a U.S. Government-capitalized vehicle [Green Stocks Research, April 20, 2026; USAR press release, April 20, 2026].

The deal directly answers the Serra Verde offtake and separation watch item this desk flagged in its May 24 piece on Brazil’s critical-minerals regulatory gaps, and the answer is more sweeping than expected: not a partner, but a full mine-to-magnet merger.

The MREC redirect

Serra Verde’s mixed rare earth carbonate currently ships to China for separation under an arrangement that expires at the end of 2026. The combined company plans to redirect that MREC feedstock into USAR plus Carester separation facilities, with eventual magnet production at USAR’s Stillwater plant in Oklahoma [Green Stocks Research, April 20, 2026]. Western mining and Western separation are stitching themselves together inside a single corporate structure for the first time at scale.

Why Pela Ema is the asset Washington wanted

Pela Ema sits in Minaçu, in the state of Goiás. Brazil ranked 19th globally and second in Latin America in the Fraser Institute’s 2025 Survey of Mining Companies, narrowing the gap with Argentina’s San Juan (18th globally) but still trailing it for the regional top spot [Fraser Institute Annual Survey 2025; BNamericas, 2025]. The deposit is an ionic clay system extracted via open-pit strip mining with no wet tailings, renewable electricity and biofuels. Commercial production commenced in January 2024 after more than $1.1 billion of capital invested over 16 years, and the mine is still ramping toward Phase 1 nameplate of approximately 6,400 metric tons TREO per year (current output sits in the 4,000 to 5,000 tonne range, with full nameplate targeted by end-2027). Mine life runs 2026 to 2047, and a potential Phase 2 expansion under consideration could roughly double run-of-mine production before 2030 [Green Stocks Research, April 20, 2026].

The strategic value sits in the basket. By revenue, yttrium accounts for approximately 42 percent of Serra Verde’s output, NdPr 22 percent, dysprosium 19 percent, terbium 13 percent. By end of 2027, Serra Verde is projected to account for roughly 58 percent of non-China dysprosium oxide supply, 39 percent of non-China terbium oxide supply, and 92 percent of non-China yttrium oxide supply [Green Stocks Research, April 20, 2026]. Light rare earths like neodymium and praseodymium were already available from MP Materials in Mountain Pass and Lynas in Mt Weld. Dy and Tb are the hard gap. Goiás closes it.

The capital stack Washington bolted on

The transaction is structurally a roll-up of US Government commitments around a Brazilian mine. Serra Verde brings the $565 million DFC financing package that fully funds Phase 1 optimization and expansion through to positive cash flow. USAR brings $1.577 billion in Department of Commerce commitments under a non-binding LOI announced in January 2026, plus $140 million in undrawn DFC debt commitments and $100 million in DFC convertible debt. Pro forma liquidity for the combined company lands at approximately $3.2 billion, with about $1.8 billion of total committed U.S. Government debt and equity capital [Green Stocks Research, April 20, 2026].

The 15-year offtake from Serra Verde covers 100 percent of Phase 1 magnetic rare earth production with contractual price floors: $110/kg for both Nd and Pr, $575/kg for Dy, and $2,050/kg for Tb. Those floors sit well below current non-China spot prices reported by Green Stocks Research at approximately $140/kg for Nd/Pr, $1,100/kg for Dy and $4,000/kg for Tb. Serra Verde retains 70 percent of any realized price above floor [Green Stocks Research, April 20, 2026]. The DOC, DFC and SPV combination does the work that IRA 45X production credits alone cannot do for heavy rare earths. Floor-price offtake plus government debt and equity is the format the U.S. is using to crowd private capital into heavy rare earth mining without requiring a tariff structure to defend it.

The window that closes November 10

The April 20 announcement is being executed straight into Beijing’s escalating export-control timeline. On April 4, 2025, China added seven medium and heavy rare earths, including terbium, dysprosium, samarium, gadolinium, lutetium, scandium and yttrium, to its export control list. The October 9, 2025 expansion, a foreign-direct-product-style rule covering any foreign product with greater than 0.1 percent Chinese-origin rare earth content, was suspended on November 7, 2025 for one year, expiring November 10, 2026 [CSIS, 2025; Clark Hill PLC, 2025]. Serra Verde’s existing China separation arrangement expires the same six-week stretch. Two clocks, end of 2026 and November 10, 2026, are running on the same calendar.

What this changes for the magnet curve underneath AI hardware

NdFeB permanent magnets are the load-bearing component of AI hardware’s mechanical layer: the high-efficiency motors driving data center cooling fans and pumps, the robotic actuators inside semiconductor fabs, the lithography stages that print every leading-edge node. Dy in particular protects magnet performance at high temperature, which is why it carries the $575 contract floor and the $4,000 spot. The strategic question is no longer whether the West can source NdPr. It is whether the West can source Dy and Tb without going through Ganzhou. After April 20, the answer has Goiás in it.

Tantalum’s SDX (Southern Diversification Index) reads 96.1, down 3.9 percent year to date through May 22, 2026 [Tantalum indexes.json, May 22, 2026]. A deal of this scale, closing in Q3 2026, is the kind of structural inflection SDX is designed to capture once it shows up in equity markets.

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