Ero Copper

Phase A — Understand the business

Company Overview

What it is. Ero Copper Corp. is a Vancouver-headquartered, Brazil-operating copper producer with a gold by-product stream. Incorporated in British Columbia, principal office at 625 Howe Street, Vancouver; IPO'd October 2017; common shares trade on the NYSE and TSX under "ERO", with 104,192,288 shares outstanding at 31 Dec 2025. Reporting currency USD; auditor KPMG LLP (Vancouver).

How it makes money. Three producing assets, all in Brazil:

1. Caraíba Operations (Curaçá Valley, Bahia State) — the legacy core. A fully integrated underground-led copper complex: the Pilar and Vermelhos underground mines plus the Surubim open pit, feeding the Caraíba mill (~4.2 Mtpa throughput). Held via a 99.6% interest in MCSA (Mineração Caraíba S.A.). Copper concentrate is the product; silver is a minor by-product.
2. Tucumã Operation (Pará State, Carajás province) — the new growth mine (formerly the Boa Esperança project), an IOCG-type open-pit copper deposit. Declared commercial production effective 1 July 2025. This is the asset that re-rates the company.
3. Xavantina Operations (Mato Grosso State) — a high-grade underground gold mine (the old NX Gold) producing gold concentrate; the gold/silver by-product cash offsets copper unit costs.

Customers / contract structure. As a concentrate producer, Ero sells to smelters and traders under offtake/streaming arrangements; revenue is commodity-priced (LME copper + gold), not recurring or take-or-pay. There is a gold-stream/precious-metals purchase agreement referenced in the gold-concentrate-sales-through-mid-2027 commentary. No single-customer disclosure on the shelf (our figures empty); concentrate offtake in copper is typically diversified across global smelters, so customer concentration is low — the real concentration is commodity-price and single-country, not customer.

One-line model. Dig copper (and some gold) out of three Brazilian mines, sell concentrate at the world price; earnings are leveraged to the copper price and to execution on a multi-year growth/deepening capexCapital expenditureMoney spent on long-lived things — buildings, machines, servers — rather than on running costs. program.

Supply Chain

Map: upstream inputs → Ero's three mines/mills → concentrate → smelter/trader → end use (wire, EVs, grid, construction).

• Upstream inputs Ero buys: electricity (Ero stresses renewable/hydro power in Brazil as a cost and ESG advantage), diesel, grinding media, sulfuric acid / reagents (management notes Caraíba's underground sulfide route avoids the acid-leach exposure that hits oxide/heap-leach peers), explosives, mining equipment, and labor (Brazilian, Real-denominated — a key FX exposure).
• The asset (chokepoints): the Caraíba mill (~4.2 Mtpa) is the single processing throat for the Bahia complex; the Pilar shaft "Deepening Project" is the critical-path internal bottleneck — until the external shaft reaches bottom (targeted end-2026/early-2027), Pilar's mining rate and unit costs are capped. At Tucumã, the binding constraint through the 2024–25 ramp was filter/dewatering capacity plus a localized windstorm power outage (5 Oct 2024) that forced a guidance cut; three new modular filters (sourced from Thailand) arrive Q3 2026, operational Q4 — explicitly not in 2026 guidance, i.e. upside.
• Single-source / concentration risk: 100% of production is in Brazil — the entire supply chain (power grid, ports, labor law, tax, currency) is single-jurisdiction. Power is the named historical chokepoint (the Tucumã windstorm). Concentrate then flows to third-party smelters (Ero does not smelt), so it is a price-taker on treatment/refining charges (TC/RCs).
• Downstream / end customer: copper into electrification (grid, EVs, data-center/AI power build-out, construction), the secular demand story that underwrites the whole thesis.

Named stakeholders: MCSA (99.6%-owned operating subsidiary, Bahia); KPMG (auditor); Brazilian hydro grid (power); Thai filter OEM (Tucumã dewatering); the gold-stream counterparty (precious-metals purchase agreement). Provenance caveat: detailed offtaker/smelter names are not on the shelf — supply-chain.md and our figures are missing/empty; this would be a backfill item.

Competitive Advantages (moats)

Mining is a commodity business — there is no product-differentiation moat; copper is copper at the LME. The defensible advantages are cost-curve position, asset quality, and jurisdiction:

• Cost-curve position (the real moat). Consolidated copper C1 cash cost $2.06/lb for FY2025, with Tucumã at $1.69/lb. A new mine entering near the first/second quartile of the global cost curve is the single best thing about the story — it pulls the consolidated cost down as it scales. Gold by-product credits from Xavantina further offset copper unit costs.
• Grade & exploration upside. Caraíba is a high-grade underground system with a demonstrated record of reserve replacement (e.g. a prior 31% reserve increase extending Caraíba mine life to ~20 years). Furnas (see Lens 11) adds a 24-year, low-capital-intensity copper-gold development option in the same country. Exploration optionality is part of the moat for a high-grade district operator.
• Jurisdiction / cost structure. Management frames Brazil as a differentiated advantage: renewable power, established local supply chains, deep capital markets, and "relative strategic positioning," plus an underground sulfide route that sidesteps the sulfuric-acid cost exposure of oxide peers.
• Bargaining power: weak vs. the copper price (pure price-taker), moderate vs. smelters (concentrate is sought-after when TC/RCs are low, as in the current tight market), moderate vs. suppliers/labor (Real-denominated, exposed to Brazilian wage inflation — they negotiated ~5% increases ).

Verdict on moat: narrow and cost-based, not franchise-based. Durable only as long as the orebodies stay high-grade and Brazil stays stable. This is a good-asset/good-operator story, not a wide-moat compounder.

Segments

Hard requirement note: our figures on the shelf is empty, so every figure here is from Ero's FY2025/Q1-2026 6-K releases — flagged, and a backfill item.

By asset (FY2025, copper in tonnes; gold in oz):

Geography: ~100% Brazil (Bahia / Pará / Mato Grosso). Corporate domicile Canada. No geographic diversification — a structural feature, not a footnote.

Trend: the story is accelerating production, decelerating unit cost — consolidated copper rose to a record 64.3 kt in 2025 (Tucumã contributing its first ~16.9 kt of commercial tonnes), guided to 67.5–77.5 kt in 2026 (up to +20%). The cause is singular: Tucumã coming online. The offset: Caraíba grades dipped (Pilar deepening) and gold guidance was cut (40–50k oz from a prior 50–60k oz), so the gold tailwind is softer than hoped.

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Phase B — Measure performance

Earnings Result (latest print — Q1 2026)

The print (quarter ended 31 Mar 2026): Sales US$263.2M; net income US$108.8M; diluted EPS $0.69 — a MISS vs. ~$0.85 consensus. Adjusted EBITDA $125.2M, ~doubled YoY. Consolidated copper production 17,287 t; gold 5,495 oz (low — weather/timing-driven concentrate-sale phasing). Net debt $490.7M, leverage 1.0x (down from ~2.4x a year earlier).

Read-through: the headline EPS miss was driven by cost inflation (BRL strength, diesel/chemicals) and gold-sales timing, not a copper-volume problem — copper output and full-year guidance were reaffirmed. The stock actually rose ~5% on the print, i.e. the market looked through the EPS miss to the deleveraging and reaffirmed copper guidance. That tells you what this stock trades on: copper volume + balance-sheet repair + the copper price, not quarterly EPS precision.

FY2025 context (the year that re-rated it): revenue $785.8M; net income $263.7M; diluted EPS US$2.54 (a swing from a −US$0.66 FY2024 diluted loss); adjusted EBITDA $409.7M (+$193.5M YoY); operating cash flow $395.1M.

Balance-sheet flags: net debt $501.7M at YE2025 (leverage 1.2x), improved to $490.7M / 1.0x at Q1 2026. Liquidity $150.4M at YE2025 ($105.4M cash + $45.0M undrawn revolver). A US$400M Senior Notes due 2030 anchors the debt stack; the $145M revolver balance is the next deleveraging target now that 1x is hit.

Conflict flagged (provenance discipline): YE2025 net debt is reported as $501.7M (1.2x) in the FY release and $490.7M (1.0x) at Q1 2026 — these are different dates, not a contradiction, but the leverage-ratio denominators differ across releases (trailing EBITDA basis), so treat "1.2x→1.0x" as directional, not precise. The FY2024 GAAP net loss (−$0.66) vs. adjusted NI +$80.4M/+$0.78 gap is real and material — non-cash FX/derivative and ramp items — and is revisited in Lens 10.

Earnings Calls (sentiment trend)

Source: Q1 2026 call transcript, cross-read against the Q4-2024 (missed/stock-dipped) and FY2025 (record) prints.

Tone arc over the last ~5 quarters: Q4 2024 = chastened (Tucumã windstorm power outage + guidance cut, stock dipped) → FY2025 = vindicated/record ("next phase of step-change growth") → Q1 2026 = confident-but-hedged. Management has moved from defending a stumbling ramp to talking about capital returns — a genuine sentiment improvement.

What they emphasize now (recurring phrases): "broad enthusiasm for copper backstopped by tight supply and a serious lack of quality development assets"; Brazil's "deep capital markets… resource production capacity and relative strategic positioning"; being "reasonably well insulated" from cost inflation (renewable power, no acid, local supply chains); and FX hedging to offset Real strength.

What's new / forward-leaning: they now say they "expect to begin returning capital to shareholders" with a "broader capital return framework" to come — a first for a company that has paid zero dividend.

Hedge/caution language (what to watch): "all else being equal," "not included in our guidance," "difficult to know what each morning's news will bring," and an acknowledged "5-to-10-cent diesel impact" risk to the high end of cost guidance. The candor is a positive signal; the cost caveats are the real risk the tape is underwriting.

Comps

Peer set pulled from research/universe/our figures (copper subsegment) — closest mid-cap producer peers, plus the large-cap anchors.

5-yr avg ROE: n/a for the peer set (would require a database pull; do not fabricate).

Read: on a trailing EV/EBITDA ~6.4x, Ero sits right in the 5.74–6.39x mid-cap copper band (Hudbay/Capstone) — i.e. fairly valued vs. peers, not cheap on that basis. The bull's valuation case rests on the forward multiple (~9.1x fwd P/E and a falling EV/EBITDA as Tucumã EBITDA annualizes and Furnas is unpriced), plus a P/NAV discount that mid-tier copper names (FM, CS) carry — but I could not source a clean P/NAV for ERO specifically, so "trading at a discount" is a forward/NAV claim, not a trailing-multiple fact. Provenance-critical: the two ERO EV/EBITDA prints (6.4x vs 14.7x) use different EBITDA bases/dates — do not average them.

Stock-Price Catalysts (what actually moves ERO)

What has moved the stock >5% over the cycle, and the pattern:

• Oct 2024 — DOWN: Tucumã windstorm power outage → 2024 copper guidance cut. Execution/ramp risk is the #1 downside trigger.
• Feb–Mar 2025 — DOWN/mixed: Q4 2024 earnings miss, weaker-than-hoped 2026 framing, BofA downgrade Buy→Hold, target to $33.
• Through 2025 — UP (big): Tucumã commercial production (1 Jul 2025) + record FY2025 + copper to all-time highs → the stock is +83% over the trailing 12 months.
• Feb 2026 — UP: Furnas maiden PEA ($2.0B NPV, 24-yr life) added a development leg to the story.
• May 2026 — UP ~5%: Q1 2026 — EPS miss but reaffirmed guidance + 1.0x leverage + capital-return signal; the market rewarded the balance sheet over the EPS line.
• 2026 — DOWN catalyst (analyst): Goldman downgrade Buy→Neutral on valuation, target $33→$31; BofA trim to C$45 from C$49 on a 16% EBITDA-estimate cut.

Pattern: ERO is a two-factor stock — (1) the copper price and (2) execution at Tucumã/Pilar. Earnings quality (EPS beats/misses) barely moves it; production guidance, ramp milestones, copper macro, and balance-sheet/leverage prints are what re-rate it. It is a high-beta copper proxy with idiosyncratic Brazilian-execution risk layered on top.

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Phase C — Judge people & books

Management

• Founders & succession. David Strang (co-founder) ran the company from the 2017 IPO and moved to Executive Chairman effective 1 Jan 2025; Makko DeFilippo (joined 2017 as VP Corporate Development, President from 2021, COO from 2023) became CEO. Co-founder Noel Dunn (Chairman) retired from the board. So this is a founder-led company in a clean, telegraphed generational handoff — the founder stays as Chair, the long-tenured operator who built the asset base takes the wheel. That continuity is a positive.
• Track record. The team took Caraíba from a single legacy mine to a three-asset producer, replaced reserves (the ~31% Caraíba reserve increase to a ~20-yr life), and delivered Tucumã into commercial production — a genuine mine-build executed (if late and over a windstorm). Counter-evidence: the 2024 guidance cut and the slower-than-planned ramp show execution is good-not-flawless.
• Capital allocation. History is reinvestment-heavy: nearly all cash has gone into building Tucumã, deepening Pilar (~$80M in 2026), and advancing Furnas — no dividend, no buyback to date (0% yield). With FY2025 ROE strong on a $263.7M net-income year, the reinvestment looks value-accretive so far. The new "capital-return framework" signal (Q1 2026) is the first pivot from pure growth toward returns — worth tracking but unproven.
• Skin in the game. CEO DeFilippo directly owns 0.11% ($3.3M) — modest for a founder-adjacent CEO. Insiders were net sellers over the last 12 months (~$4.1M net disposed) — into an 83% run, which is unsurprising but is not the insider-buying signal a bull would want.
• Red flags (governance): none material on the shelf. The 40-F shows an independent audit committee (Angevine (chair), Braaten, Tejani, Wright), two designated financial experts, KPMG clean ICFR attestation, no Code-of-Ethics waivers, no restatements, no error-correction checkbox. Governance hygiene is good.
• Archetype: founder-built, operator-led mid-cap transitioning to a professional-CEO phase — the right profile for a company moving from "build the mines" to "run and optimize the mines + allocate capital."

Forensic Red Flags

Acting as a forensic analyst. Shelf limitation: detailed financial statements (the 99.3 exhibit) are not ingested, so several items are necessarily /inferred rather than tied to a line item — flagged.

• GAAP vs. adjusted gap (the one to watch). FY2024 GAAP diluted EPS was a LOSS (−$0.66) while "adjusted" NI was +$80.4M / +$0.78. A ~$1.44/share GAAP-to-adjusted swing is large. For a Brazilian-real operator with USD-denominated $400M notes, the usual culprits are unrealized FX/derivative losses and ramp/non-cash items — management explicitly leans on FX hedging. Action: a refresh should pull the 99.3 statements and reconcile the adjusting items; an "adjusted" number that is persistently and largely above GAAP is exactly where to apply skepticism.
• Capitalized development vs. expensed cost. A company mid-build (Tucumã, Pilar shaft, Furnas) capitalizes heavy development spend (~$275–320M capex guided for 2026). That is normal for a miner, but it means reported earnings flatter cash reality during the build — watch the FCF-vs-net-income gap. FY2025 OCF ($395.1M) comfortably exceeded net income ($263.7M), which is reassuring (D&A + working capital), but post-capex FCF is thin while the growth program runs.
• Reserve/resource estimate dependence. Earnings power rests on NI 43-101 reserves signed off by a long list of QPs (the 40-F lists ~20+ technical consents — Brazilian/Chilean engineers). Reserve restatements or grade-reconciliation misses (Caraíba grades already dipped) are the mining-specific accounting risk.
• By-product accounting. C1 cash costs are reported net of gold by-product credits; a softer gold stream (guidance cut to 40–50k oz) mechanically raises reported copper unit costs — already visible in the 2026 cost guide ($2.15–2.35/lb vs $2.06 actual 2025).
• SBC / dilution: share count 104.2M; no flag that SBC is materially flattering non-GAAP, but unconfirmed from the shelf.

Regulatory findings (required sub-section):

• SEC Litigation Releases: None. Verified via SEC EDGAR EFTS (LR), search window 2021-06-29→2026-06-29.
• SEC AAERs: None in the same window.
• Non-SEC (FTC/DOJ/FDA/CFPB/consent-decree/fine): web search returned no material enforcement actions against Ero Copper. As a Brazilian miner the relevant non-US exposure is environmental/permitting/labor (e.g. Brazil's proposed "6x1" shift-law change, which management supports and is not in guidance ) — monitor, but nothing adjudicated.
• 10-K Item 3 (Legal Proceedings): Ero files a 40-F (not a 10-KForm 10-KA company’s audited annual report to the US regulator. The most complete thing it publishes.); the equivalent legal-proceedings disclosure is in the AIF (Exhibit 99.1), not ingested — flagged as a refresh item. The 40-F cover itself discloses no off-balance-sheet arrangements and an effective ICFR with no restatements.
• Summary: No material regulatory or legal findings — verified via SEC EDGAR EFTS (LR, AAER) and web search as of 2026-06-29; the AIF Item-equivalent legal section is unread on the shelf and should be checked on refresh.

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Phase D — Project & stress-test

Forward Projection (EPS, three fiscal years)

Anchor actuals: FY2025 diluted EPS US$2.54 on $785.8M revenue, 64,307 t Cu @ $2.06/lb C1, EBITDA $409.7M; ~104.2M shares.

Drivers:

• Volume: 2026 guided 67.5–77.5 kt Cu (up to +20%); Tucumã filters (Q4 2026) and Pilar shaft (2027) lift 2027+ toward ~80 kt; Furnas is not in this window (PFS → build is multi-year).
• Price: copper at/near record highs — LME ~$13.2k/t (~$6.00/lb) Jan 2026, spot ~$13.5k+/t mid-2026, bank targets $9,800–$15,500/t. This is the single biggest swing factor — a 10% copper move swings EPS far more than any volume/cost line.
• Cost: 2026 C1 guided $2.15–2.35/lb (up on BRL/diesel and softer gold credit), improving H2 as Caraíba grades recover and Tucumã filters help.
• Capex/financing: ~$275–320M capex; interest on $400M notes + revolver; deleveraging at 1.0x reduces the interest drag over time.
• Dilution: negligible (~104M shares, no equity-raise signaled).

Scenarios (output, arithmetic shown; copper price is the dominant variable):

Caveat: these are price-driven scenario estimates, not a built-up model from the 99.3 statements (not on shelf). Copper-miner EPS is so price-levered that the base case is barely meaningful without a committed copper deck — treat the range, not the point.

Forecast log: Skipped — this is a --watchlist (unattended) run; per SKILL.md, do not our model create here. A tracked Brier forecast (e.g. "ERO FY2026 non-GAAP EPS ≥ $2.40") should be logged only on a genuine committed base case in an interactive pass.

Bull vs Bear

Bull case. Ero just crossed the inflection every developer-to-producer is valued on: Tucumã is commercial, consolidated production is at a record and guided up to +20%, unit costs are low (Tucumã $1.69/lb), and the balance sheet is repaired to 1.0x — all into the best copper tape in history. On top of the producing base sits genuine optionality: Furnas (24-yr, $2.0B NPV at $4.60/lb copper, $4.7B at $6.10/lb), the Pilar deepening (lower costs from 2027), and Tucumã filter upside not yet in guidance. Management is founder-built, governance-clean, and just signaled the first-ever capital-return framework. If copper stays bid on electrification/AI-power demand and a structural deficit, ERO's EBITDA annualizes higher, the EV/EBITDA compresses, and the stock re-rates toward NAV. The contrarian read: the market is still pricing in the 2024 ramp scars and hasn't fully credited Tucumã's run-rate economics or Furnas.

Bear case. Three things can permanently or semi-permanently impair the thesis: (1) Copper price — ERO is a leveraged price-taker; Goldman explicitly expects surplus to cap copper sub-$11k/t and a fall from record highs, which would compress margins and EPS hard (the bear EPS roughly halves). (2) Single-country (Brazil) concentration — 100% of assets in one jurisdiction exposes it to BRL strength (already hitting costs), the windstorm-style power fragility that cut 2024 guidance, Brazilian labor-law changes (6x1), tax and permitting. One country, one currency, no diversification. (3) Execution/cost creep — 2026 cost guidance already stepped up to $2.15–2.35/lb, gold credit was cut, and the EPS line missed in Q1; if Pilar/Tucumã slip again, the "step-change" narrative cracks. And on valuation: at ~6.4x trailing EV/EBITDA it is mid-pack, not cheap, after an 83% run, and two banks (Goldman, BofA) have downgraded/trimmed on valuation with targets ($31–33 USD) at or below the current price.

Pre-mortem (18 months out, thesis broke): Copper rolled over from record highs into 2027 as the surplus camp was right; the Real stayed strong and diesel/labor pushed C1 above $2.35; Pilar shaft slipped past early-2027 and Caraíba grades didn't recover on schedule; the much-hyped Furnas PFS came in needing more capital than the "low-intensity" PEA implied. EBITDA fell, the no-yield growth premium evaporated, and the stock gave back most of the 2025 re-rate.

Are multiples too high? Not egregiously — 6.4x trailing EV/EBITDA is reasonable, but it already embeds Tucumã success and bumper copper; there is no margin of safety at the current price with targets clustered $31–37. You are paying for execution-plus-copper to keep going right.

Contrarian view (what the market may be refusing to see): the bull's overlooked angle is Furnas as a strategic, low-capital-intensity copper-gold asset in a copper-starved world with "a serious lack of quality development assets" — in an M&A-hungry sector, a clean Brazilian growth pipeline at 1.0x leverage is a takeout-quality package. The bear's overlooked angle is that "copper at record highs" is itself the risk — when realized price is at an all-time high, the only surprises left are negative, and a single-country price-taker has the least cushion when they come.

Devil's Advocate (short-seller)

Dismantling the bull case:

• The whole thesis is a leveraged bet on the copper price at its all-time high. Strip out copper's record run and ERO is a ~64-kt mid-cap miner that lost money on a GAAP basis in 2024 and missed EPS in Q1 2026. The 83% move is the copper move; you're buying high-beta exposure to a commodity that Goldman thinks falls and a surplus caps.
• Revenue/asset concentration is total: one country. 100% Brazil. The 2024 windstorm that cut guidance is the tell — a single localized weather event moved the numbers. Add BRL strength (already inflating costs), labor-law reform, power-grid fragility, Brazilian tax/permitting. There is no second leg to catch a fall.
• The moat is just cost-curve position, and it's already eroding at the margin. 2026 C1 guidance stepped up ($2.15–2.35 vs $2.06), the gold by-product credit was cut, and Caraíba grades dipped pending a shaft that could slip again (it already has a history of slipping).
• Insiders are selling, not buying. ~$4.1M net insider selling in 12 months and a CEO owning ~0.11% — that is not conviction into the run.
• Capital-allocation history = no returns yet. Zero dividend, zero buyback through the entire re-rate; the "capital-return framework" is a promise, not a policy. Every dollar has gone into a capex program (Tucumã, Pilar, Furnas) whose returns are still partly in the future.
• Valuation has no cushion. ~6.4x trailing EV/EBITDA is mid-pack vs Hudbay (5.74x)/Capstone (6.39x), and Goldman and BofA have downgraded/trimmed, with USD targets $31–33 bracketing the current ~$25.75 price — i.e. the sell-side sees ~flat-to-modest upside, not a steal.

If growth disappoints 20–30% (copper down + a Pilar/Tucumã slip): the bear-case EPS (~$1.40) on a de-rated ~5x EBITDA and an evaporated growth premium would take the stock down sharply — easily a 30–40% drawdown from a record-copper starting point.

Single scenario that permanently impairs: a sustained copper bear market coinciding with a Brazilian operating shock (prolonged power/permitting/currency event) while the balance sheet is mid-growth-capex — turning the 1.0x leverage back toward 2.4x and forcing the growth program to be deferred. Plausibility: low-to-moderate (needs two things to go wrong at once), but it's the real tail.

Management Questions (ordered by information value)

1. With copper at all-time highs and a strong Real inflating costs, at what copper price does the current growth-capex program (Pilar, Tucumã filters, Furnas) become free-cash-flow negative, and what's the trigger to defer it?
2. You've signaled a capital-return framework — be specific: dividend vs. buyback, what leverage/FCF threshold unlocks it, and is it sized to survive a copper down-cycle?
3. Furnas: what is the realistic initial capital intensity in the PFS vs. the PEA, the funding plan (internal cash, debt, JV/partner, or equity?), and the FID timeline?
4. Pilar shaft has slipped before — what is the residual schedule/cost risk to reaching shaft bottom by early 2027, and the cost impact if it slips another two quarters?
5. 100% Brazil: what is the explicit jurisdictional-diversification strategy (or deliberate concentration thesis), and how do you hedge the power-grid fragility that cut 2024 guidance?
6. Reconcile the persistent GAAP-vs-adjusted gap (2024 GAAP loss vs. adjusted profit): how much is recurring FX/derivative noise vs. one-offs, and how should we model "true" earnings power?
7. How far can C1 cash costs actually fall as Caraíba grades recover and Tucumã filters come on — give a credible 2027 exit-rate, and the BRL/diesel sensitivities around it?
8. Gold stream / Xavantina: gold guidance was cut and the precious-metals agreement runs through mid-2027 — what's the plan for the gold stream post-2027, and how much does a weaker gold credit raise copper unit costs?
9. Reserve/grade reconciliation: how is actual mined grade tracking vs. the block model at Caraíba and Tucumã, and what's the reserve-replacement runwayRunwayHow long the cash lasts at the current rate of spending. It shortens the moment spending rises, which is why a figure taken from a quiet quarter flatters. beyond the ~20-yr Caraíba life?
10. In a sector "starved of quality development assets," is Ero a consolidator or a target — what's the board's posture on M&A, and at what premium?
11. What is the TC/RC exposure on concentrate offtake, and how do tight smelter terms flow through to your realized copper price?
12. How exposed are you to the proposed Brazilian "6x1" shift-law change and broader labor inflation, quantified, beyond the ~5% negotiated increases?
13. The Tucumã filters from Thailand are upside not in guidance — what incremental throughput/tonnes and cost reduction do they actually unlock, and when do they hit run-rate?
14. With the $400M 2030 notes and a $145M revolver, what's the target capital structure through the cycle, and would you refinance the notes early given the deleveraging?
15. After the founder-to-DeFilippo handoff, what changes (if any) in strategy or capital discipline should shareholders expect that wouldn't have happened under the prior structure?

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