Nexa Resources Shares Trade Below Boliden's $15.29 Takeover Price as Analysts Argue the Zinc Miner Is Worth More

What happened

On August 27, 2026, Sweden's Boliden agreed to buy Brazilian conglomerate Votorantim's 64.68% controlling stake in Nexa Resources, the Peru- and Brazil-focused zinc and silver miner listed on the New York Stock Exchange, in an all-share deal implying $15.29 per Nexa share and a total consideration of $1.31 billion. The exchange ratio -- 0.250 newly issued Boliden shares for every Nexa share Votorantim holds -- values Nexa's equity at roughly $2.025 billion and hands Votorantim 21.4 million new Boliden shares, about 7% ownership of the enlarged Swedish company. Boliden CEO Mikael Staffas said the deal would "reinforce our standing as a globally important base metal producer and bring a healthy addition to our precious metal business," a reference to the silver, lead and gold Nexa produces as byproducts of its core zinc mining. Boliden has committed to a voluntary tender offer (VTO) for Nexa's remaining public shares within 30 to 60 days of closing, priced off the same exchange ratio and Boliden's own 20-day average share price in the run-up to closing, expected in the first quarter of 2027.

Investors gave the deal a cool reception. Nexa shares fell roughly 9.7% the day after the announcement, closing at $14.07 -- already about 1.9% below the deal's own implied value -- and the premium Boliden advertised shrank depending on which reference window was used: 14.2% over Nexa's 20-day average price from July 1, but just 6.5% against its average in the days immediately before the August 27 announcement. That gap between the deal's headline premium and its recent-price premium is now central to an undervaluation argument building among analysts, including a September 19 simplywall.st piece: if Nexa's own operations keep improving before the deal closes, a fixed exchange ratio struck in August may already be stale by the time the voluntary tender offer is actually priced.

The operating evidence for that argument arrived in the weeks after the takeover was announced. Nexa's Cajamarquilla zinc smelter in Peru -- the largest zinc smelter in the Americas, and one of three smelters changing hands in the Boliden deal -- had been knocked offline months earlier by a fire on May 13, 2026 that injured four people (one Nexa employee and three contractors, all in stable condition) and damaged part of the plant. Nexa restored electrolysis lines first, had one casting line producing zinc bars again within about two weeks, and had all three casting lines running by mid-June, holding its full-year 2026 sales guidance throughout even as it estimated the outage cost roughly 7,000 tonnes of refined zinc production -- about 2% of a year's output -- expected to be recovered in the second half of 2026. That recovery lines up with a Q2 2026 revenue beat: sales of $907.94 million, up 28% year-over-year, and adjusted EBITDA up 78%, alongside continuing cost reductions at the company's Cerro Lindo mine in Peru and the ongoing ramp-up of its Aripuana project in Brazil.

The details

The mechanics of the deal explain why an operational improvement at Nexa doesn't automatically translate into a higher buyout price. Because Boliden structured the acquisition as a share exchange -- 0.250 of its own newly issued shares per Nexa share -- rather than a fixed cash number, the dollar value investors quote ($15.29) is really just Boliden's own share price multiplied by that ratio on the day the deal was announced. The cash voluntary tender offer that follows for minority shareholders will instead be benchmarked to Boliden's 20-day average share price immediately before closing, expected in the first quarter of 2027. Nexa's own earnings growth between now and then does nothing to move that ratio; only Boliden's own share price does. That is the mechanical reason a stronger Nexa quarter can coexist with a buyout price that doesn't move.

The spread between fair-value estimates shows how unsettled the valuation question still is. One simplywall.st community narrative places Nexa's standalone fair value near $15 a share, barely above the deal price and implying only modest undervaluation. A separate Seeking Alpha estimate puts standalone fair value at $18-24 a share, built on multiples of 5.1 times expected 2026 earnings and 4.2 times expected 2027 earnings -- a considerably larger gap. Both can't be equally right, and the difference matters because it determines whether Boliden's $15.29 offer looks like a fair price for a company with modest upside or a bid arriving well below where the underlying business is actually headed.

The operational facts feeding that debate are genuinely specific, not a generic re-rating story. Cajamarquilla's fire-driven production loss -- 7,000 tonnes of refined zinc, about 2% of Nexa's annual volume -- was framed and guided as recoverable within the same year almost immediately, and the smelter's phased restart (electrolysis first, then casting lines one by one through mid-June) followed a documented, verifiable timeline rather than a vague "recovery underway" claim. Layered on top, Cerro Lindo's cost reductions and Aripuana's ongoing ramp-up represent margin expansion independent of the Cajamarquilla story entirely, which is why analysts building the undervaluation case point to specific operating line items rather than simply citing a low trading multiple against sector peers.

None of this makes the deal's completion, or its ultimate minority-shareholder price, a settled matter. Closing depends on Boliden's own shareholders approving the transaction and on regulatory clearance across multiple jurisdictions, including mandatory tender offers under Peruvian rules for Nexa's Lima-listed subsidiaries within six months of closing -- a separate regulatory track running alongside the voluntary US tender offer. Until Boliden's board and regulators clear those steps and its own share price sets the final VTO number sometime near the targeted first-quarter-2027 close, the "undervalued" argument remains a case built on operating data and competing analyst models, not a price anyone has actually locked in.

Why it matters

Zinc already gets steady coverage on this site through India's own dominant producer, Hindustan Zinc, and through spot-price moves tied to Federal Reserve policy and global inventory swings. Nexa Resources sits outside that domestic story entirely -- a Latin American producer being absorbed into a major European base-metals group -- but it's a useful marker of consolidation among the world's larger zinc and silver miners at a time when India's own producers and buyers compete and trade in the same global zinc market. The deal itself doesn't touch Indian supply chains directly, and nothing here should be read as a signal about India-specific zinc pricing, but a top-tier global zinc-silver miner changing hands is the kind of structural shift in who controls global supply that's worth tracking alongside the day-to-day price moves this site already covers.