Slide 1: Earnings Conference Call 2Q25
Earnings Conference Call 2Q25 August 1, 2025 Cajamarquilla Smelter – Lima, Peru
Slide 2: Disclaimer
Disclaimer Important information concerning this presentation This presentation, prepared by Nexa Resources S.A. (herein referred to as “Nexa Resources”, “Nexa”, or the “Company”), is solely for informational purposes. Disclosure of this presentation, its contents, extracts or abstracts to third par
Slide 3: Business Catalysts: Key Drivers of Value
Business Catalysts: Key Drivers of Value 1 2 Aripuanã Cerro Pasco Integration Project Fourth tailings filter to unlock full 15y4+ LoM & NSR uplift5 production and enhance cash generation Attractive mineral province LoM1 = 15y (reserves)2; 25y+ (resources)3 3 4 Mineral Exploration Mine-Smelter Integr
Slide 4: Highlights
2Q25 | Highlights KEY OPERATIONAL RESULTS KEY FINANCIAL RESULTS Zinc Production Net Revenues Adjusted EBITDA1 (mining) 74kt US$708 mm US$161 mm 67kt (+9% vs. 1Q25) US$627 mm (+13% vs. 1Q25) US$125 mm (+28% vs. 1Q25) 83kt (-12% vs. 2Q24) US$736 mm (-4% vs. 2Q24) US$206 mm (-22% vs. 2Q24) Total Zinc S
Slide 5: Operating Performance | Mining Segment
Operating Performance | Mining Segment Zinc Production (kt) Costs (Consolidated) Upper Range Lower Range Cerro Lindo El Porvenir Atacocha Vazante Aripuanã Cash cost net of by-products1 -14% 0.16 163 2Q25: US$(0.11)/lb 141 US$0.11/lb (vs. 1Q25) In line with guidance US$0.02/lb (vs. 2Q24) US$(0.001)/l
Slide 6: Operating Performance | Smelting Segment
Operating Performance | Smelting Segment Total Sales (kt) (Metal + Oxide) Costs (Consolidated) Cajamarquilla Três Marias Juiz de Fora Cash cost net of by-products1 Upper Range Lower Range -4% 1.33 287 2Q25: US$1.23/lb US$1.20/lb 1H25 275 In line with US$1.17/lb (vs. 1Q25) revised 1.14 guidance US$1.
Slide 7: Aripuanã
2Q25 | Aripuanã 2Q25 PERFORMANCE EXPLORATION • Treated Ore and Production: increased plant downtime 1H25 results: strong geological potential reinforced by (corrective stoppages caused by heavy rainfall in 1Q25). continuous confirmation of new mineralized zones. • Concentrate quality within commerci
Slide 8: Cerro Pasco Integration
2Q25 | Cerro Pasco Integration Phase I Execution advancing. Technical Studies for Phase II progressing Phase I • EP TSF raising up to 4070 level: Execution is concluded Increase tailings • Tailings Pumping System EP: Construction works progressing Under storage capacity + Execution pumping system •
Slide 9: 1H25 | Exploration
1H25 | Exploration Cerro Lindo (7y LoM¹): Meters Drilled²: 41,048 Focused on expanding known ore bodies in the southeast (extensions of mineralized zones in Orebodies 8B and 8C). Orebody 8C: 4.2m @ (2.92% Zn, 0.30% Pb, 0.16% Cu, and 33.26 g/t Ag), continued to confirm the depth and continuity of min
Slide 10: Consolidated Financial Results
2Q25 | Consolidated Financial Results Net Revenues1 (US$ million) LME Zinc Prices (US$/t) 2,741 2,640 2Q25 Net Revenues: +1% 2,833 2,838 2,641 1,316 1,336 • +13% (vs. 1Q25): higher smelting sales volume and by-products contribution, partially offset by lower Zn prices. +13% 736 • -4% (vs. 2Q24): low
Slide 11: Investments
2Q25 | Investments Capex (US$ million) • US$87 million invested in 2Q25. US$137 million in 347 3 1H25: mostly sustaining, including mine development, maintenance and tailings storage facilities. Expansion Projects 316 • Cerro Pasco Integration Project Phase I: on track >> 1H25 Sustaining¹ 137 Capex
Slide 12: Free Cash Flow
2Q25 | Free Cash Flow (US$ million) 175 161 14 (63) (87) 13 (26) 17 3 3 Adjusted EBITDA Other non- Cash provided Interest paid Capex (2) Loans / Dividends FX (3) Working FCF operational (1) by operating and Taxes Investments Capital (4) activities before Working Capital Positive Free Cash Flow in 2Q
Slide 13: Liquidity, Indebtedness and Credit Rating
2Q25 | Liquidity, Indebtedness and Credit Rating Debt profile (as of Jun 30, 2025) Net Debt(3)/LTM Adj. EBITDA Average debt maturity: 7.7 years @6.30% avg. cost 2.7x 2.3x 2.2x 2.1x 738 Debt amortization schedule - (US$ million) Bonds Outstanding 1.7x US$1,820 (approx.) 607 (1) RCF 320 528 1,450 1,48
Slide 14: Zinc Market
2Q25 | Zinc Market Short-term: LME price evolution1 US$/ton Tariff’s ▪ Prices fell in mid-April after U.S. tariff announcements but announcements later stabilized with temporary exemptions. ▪ Tight concentrates supply continues to pressure TCs 2,764 (benchmark at US$80/t >> lowest in decades). 2,437
Slide 15: Copper and Silver Markets
2Q25 | Copper and Silver Markets Short-term: LME price evolution1 • Prices swung from US$8,539/t in April (post - ‘Liberation Day’) to US$/ton Tariff’s announcements US$10,115/t in June - the highest since 2022 – fueled by a severe short squeeze and declining exchange inventories. 10,040 • July’s 50
Slide 16: 2025 | Focus
2025 | Focus Growth: Cerro Pasco Integration Project progressing on track - a robust value-creation initiative that extends operational life by 15+ years and is expected to unlock significant NAV upside Aripuanã: long-life polymetallic asset with 2nd quartile cash cost Ongoing production growth and
Slide 17: Thank you
thank you thank you IR Contact: ir@nexaresources.com https://ir.nexaresources.com