| Ero Copper Reports Second Quarter 2025 Operating and Financial Results 
 globenewswire.com
 
 July 31, 2025 17:41 ET                                 | Source:                                Ero Copper Corp.
 
 VANCOUVER, British Columbia, July  31, 2025  (GLOBE NEWSWIRE) -- Ero Copper Corp. (TSX: ERO, NYSE: ERO) (“Ero”  or the “Company”) is pleased to announce its operating and financial  results for the three and six months ended June 30, 2025. Management  will host a conference call tomorrow, Friday, August 1, 2025, at 11:30  a.m. Eastern time to discuss the results. Dial-in details for the call  can be found near the end of this press release.
 
 HIGHLIGHTS
 
 
 Consolidated  second quarter copper production was a record 15,513 tonnes, reflecting  the continued ramp-up of the Tucumã Operation as well as higher grades  and mining rates at the Caraíba Operations.                  The Caraíba Operations produced 9,162 tonnes of copper in concentrate at an average C1 cash cost(*) of $2.07 per pound, representing approximately 25% quarter-on-quarter production growth.The  Tucumã Operation produced 6,351 tonnes of copper in concentrate, an  increase of 25% from Q1 2025. With sustained plant throughput exceeding  75% of design capacity during June, the Company declared commercial  production at Tucumã, effective July 1, 2025.
Gold production during the quarter was 7,743 ounces at an average C1 cash cost(*) and All-in Sustaining Cost ("AISC")(*) of $1,115 and $2,234 per ounce, respectively, representing approximately 17% higher production at similar cash costs(*) and AISC(*) quarter-on-quarter.Quarterly  financial performance benefited from record consolidated copper  production, increased gold production and higher metal prices compared  to Q1 2025.                  Net income attributable to the owners of the Company of $70.5 million ($0.68 per share on a diluted basis).Adjusted net income attributable to the owners of the Company(*) of $48.1 million ($0.46 per share on a diluted basis).Adjusted EBITDA(*) of $82.7 million.
At quarter-end, available liquidity(*)  was $113.3 million, including $68.3 million in cash and cash  equivalents and $45.0 million of undrawn availability under the  Company's senior secured revolving credit facility ("Senior Credit  Facility").
 The  Company is reaffirming full-year guidance at Caraíba, and updating  guidance ranges at Tucumã and Xavantina to reflect H1 2025 performance.                   At the Caraíba Operations,  programs launched in H1 2025 to enhance operating efficiency and cost  control are delivering strong margin performance compared to full-year  guidance. These ongoing initiatives include (i) focusing the Pilar  Mine's fleet on the upper levels of the mine to reduce haul distances,  (ii) implementing new technologies aimed at enhancing both safety and  productivity, and (iii) improving fleet and mine infrastructure  maintenance initiatives to increase mobile equipment availability and  reduce unplanned downtime. While these efforts are expected to result in  full-year copper production at the lower end of the 37,500 to 42,500  tonne guidance range, C1 cash costs(*) are projected to fall  within the lower half of the guidance range of $2.15 to $2.35 per pound.  Sequential increases in mined and processed volumes are expected to  contribute to higher copper production over the remainder of the year.At the Tucumã Operation, full-year copper production guidance has been updated to 30,000 to 37,500 tonnes at C1 cash costs(*)  of $1.10 to $1.30 per pound of copper produced to reflect  lower-than-forecast tonnes processed in H1 2025. Updated full-year  guidance reflects a significant expected increase in copper production  during H2 2025, consistent with original 2025 guidance.At the Xavantina Operations, full-year production guidance has been updated to 40,000 to 50,000 ounces with C1 cash costs(*) of $850 to $1,000 per ounce of gold produced and AISC(*)  of $1,800 to $2,000 per ounce to reflect lower-than- planned production  in H1 2025. Ongoing investments in mine modernization and mechanization  are expected to drive a step-change in mining rates in H2 2025,  resulting in higher projected production and lower unit costs that align  with the long-term outlook for the operation.Full-year capital expenditure guidance is unchanged at $230 to $270 million.
 "We made meaningful progress towards the achievement of our 2025 strategy during the second quarter," said Makko DeFilippo, President and Chief Executive Officer. "Highlights  included the continued ramp-up and declaration of commercial production  at Tucumã, the initiation of debt repayment, and the early completion  of Phase 1 drilling at Furnas ahead of schedule. Operational performance  across all of our assets improved in Q2 with record consolidated copper  production, and we are encouraged by the momentum we are carrying into  the second half of the year, driven by optimization and technology  initiatives we executed in H1 2025.During  Q2 2025, the Company completed 18,000 meters of drilling at the Furnas  Project and successfully concluded the 28,000-meter Phase 1 drill  program in July, approximately one quarter ahead of schedule.                   As announced on July 10, 2025, assay  results have been received for approximately 10,000 meters of the  program. These results continue to demonstrate strong continuity and  extend the known limits of mineralization within the high-grade NW and  SE Zones, which remain the focus of future underground mining  operations.As of mid-July, eight drill rigs were active on  site, supporting an average drilling rate of over 1,500 meters per week.  Based on these drilling rates, the Company expects to complete the  17,000-meter Phase 2 drill program, which will include a greater focus  on step-out drilling to further extend known mineralization, by year-end  2025.
 
 "At  Caraíba, focusing the mining fleet in the upper levels of the Pilar  Mine paired with several ongoing operational excellence initiatives is  proving to be a successful strategy. Our focus on technology,  utilization and availability has resulted in improved overall fleet  management and productivity, operational flexibility and a significant  reduction in unplanned infrastructure downtime. At Surubim, scheduled  pit sequencing led to higher mined tonnage, a trend we expect to  continue in in the second half of the year. At Xavantina, our  investments in mine mechanization, ventilation and technology support  what we see as a step-change in mining rates, allowing production to  return to annualized rates consistent with our longer-term outlook for  the operation. And at Furnas, we remain focused on unlocking long-term  value as we advance Phase 2 drilling with eight rigs active on site and  remain on track to complete the program by year-end."
 
 SECOND QUARTER REVIEW
 
 The Caraíba Operations
 
 
 The Tucumã OperationQuarterly copper production totaled 9,162 tonnes of copper in concentrate, with an average C1 cash cost(*) of $2.07 per pound.Ongoing  operational excellence initiatives to enhance availability,  utilization, safety and productivity at Caraíba are driving strong  margin performance. These initiatives include focusing the mining fleet  to the upper levels of the Pilar Mine to reduce haul distances,  technologies to enhance productivity and predictive maintenance, as well  as investments in infrastructure resilience, which are expected to  support higher sustained mining rates in H2 2025.
 
 
 The Xavantina OperationsThe  Tucumã Operation produced 6,351 tonnes of copper in concentrate during  Q2 2025, representing a 25% increase compared to Q1 2025.Ramp-up  progressed during the quarter, supported by the completion of repairs  and commissioning of the third tailings filter in April and May. This  allowed the operation to increase sustained throughput levels exceeding  75% of design capacity during the second half of June, resulting in a  42% quarter-on-quarter increase in ore tonnes processed.C1 cash costs(*)  for the Tucumã Operation will be reported commencing in Q3 2025,  following the achievement of commercial production, effective July 1,  2025.
 
 
 (*)  These are non-IFRS measures and do not have a standardized meaning  prescribed by IFRS and might not be comparable to similar financial  measures disclosed by other issuers. Please refer to the Company’s  discussion of Non-IFRS measures in its Management’s Discussion and  Analysis for the three and six months ended June 30, 2025 and the  Reconciliation of Non- IFRS Measures section at the end of this press  release.Quarterly gold production totaled 7,743 ounces of gold, an increase of approximately 17% quarter-on-quarter. C1 cash cost(*) and AISC(*) totaled $1,115 and $2,234, respectively, per ounce.Higher  tonnes processed and improved grades contributed to the sequential  increase in gold production, even as operations were temporarily  impacted by the transition to mechanized mining during the quarter.
 
 
 
 
 
 
 | OPERATING HIGHLIGHTS | 
 2025 - Q2
 | 
 2025 - Q1
 | 
 2024 - Q2
 | 
 2025 - YTD
 | 
 2024 - YTD
 |  | Copper (Caraíba Operations) |  |  |  |  |  |  | Ore Mined (tonnes) |  | 792,764 |  | 696,239 |  | 897,161 |  | 1,489,003 |  | 1,685,493 |  | Ore Processed (tonnes) |  | 791,946 |  | 692,901 |  | 957,692 |  | 1,484,847 |  | 1,811,063 |  | Grade (% Cu) |  | 1.27 |  | 1.18 |  | 1.03 |  | 1.23 |  | 1.05 |  | Recovery (%) |  | 91.1 |  | 90.2 |  | 90.2 |  | 90.7 |  | 89.2 |  | Cu Production (tonnes) |  | 9,162 |  | 7,357 |  | 8,867 |  | 16,519 |  | 16,958 |  | Cu Production (000 lbs) |  | 20,199 |  | 16,219 |  | 19,548 |  | 36,418 |  | 37,386 |  | Cu Sold in Concentrate (tonnes) |  | 9,387 |  | 6,949 |  | 8,706 |  | 16,336 |  | 18,167 |  | Cu Sold in Concentrate (000 lbs) |  | 20,697 |  | 15,318 |  | 19,192 |  | 36,015 |  | 40,051 |  | Cu C1 cash cost(1)(2) | $ | 2.07 | $ | 2.22 | $ | 2.16 | $ | 2.13 | $ | 2.23 |  | Copper (Tucumã Operation) |  |  |  |  |  |  | Ore Mined (tonnes) |  | 798,811 |  | 328,291 |  | — |  | 1,127,102 |  | — |  | Ore Processed (tonnes) |  | 418,699 |  | 294,314 |  | — |  | 713,013 |  | — |  | Grade (% Cu) |  | 1.74 |  | 2.18 |  | — |  | 1.92 |  | — |  | Recovery (%) |  | 85.4 |  | 89.4 |  | — |  | 87.2 |  | — |  | Cu Production (tonnes) |  | 6,351 |  | 5,067 |  | — |  | 11,418 |  | — |  | Cu Production (000 lbs) |  | 14,002 |  | 11,171 |  | — |  | 25,173 |  | — |  | Cu Sold in Concentrate (tonnes) |  | 5,968 |  | 5,168 |  | — |  | 11,136 |  | — |  | Cu Sold in Concentrate (000 lbs) |  | 13,158 |  | 11,393 |  | — |  | 24,551 |  | — |  | Gold (Xavantina Operations) | 
  
 |  | 
  
 |  |  |  | Ore Mined (tonnes) |  | 37,829 |  | 33,228 |  | 40,446 |  | 71,057 |  | 78,280 |  | Ore Processed (tonnes) |  | 37,829 |  | 33,228 |  | 40,446 |  | 71,057 |  | 78,280 |  | Grade (g / tonne) |  | 7.11 |  | 6.87 |  | 14.00 |  | 6.99 |  | 15.15 |  | Recovery (%) |  | 88.7 |  | 90.8 |  | 91.0 |  | 89.6 |  | 91.3 |  | Au Production (oz) |  | 7,743 |  | 6,638 |  | 16,555 |  | 14,381 |  | 34,789 |  | Au Sold (oz) |  | 8,276 |  | 5,834 |  | 17,621 |  | 14,110 |  | 34,474 |  | Au C1 cash cost(1) | $ | 1,115 | $ | 1,100 | $ | 428 | $ | 1,108 | $ | 411 |  | Au AISC(1) | $ | 2,234 | $ | 2,228 | $ | 842 | $ | 2,231 | $ | 819 | 
 
 (1)   EBITDA, adjusted EBITDA, adjusted net income (loss) attributable to  owners of the Company, adjusted net income (loss) per share attributable  to owners of the Company, net (cash) debt, working capital, copper C1  cash cost, copper C1 cash cost including foreign exchange hedges, gold  C1 cash cost and gold AISC are non-IFRS measures. These measures do not  have a standardized meaning prescribed by IFRS and might not be  comparable to similar financial measures disclosed by other issuers.  Please refer to the Company’s discussion of Non-IFRS measures in its  Management’s Discussion and Analysis for the three and six months ended  June 30, 2025 and the Reconciliation of Non-IFRS Measures section at the  end of this press release.
 (2)  Copper C1 cash cost including foreign exchange hedges was $2.06 in Q2 2025 (Q2 2024 - $2.16).
 
 
 
 
 
 
 | FINANCIAL HIGHLIGHTS ($ in millions, except per share amounts)
 |  |  |  |  | 2025 - Q2 | 2025 - Q1 | 2024 - Q2 | 2025 - YTD | 2024 - YTD |  | Revenues | $ | 163.5 |  | $ | 125.1 | $ | 117.1 |  | $ | 288.6 |  | $ | 222.9 |  |  | Gross profit |  | 67.3 |  |  | 55.5 |  | 43.3 |  |  | 122.8 |  |  | 74.5 |  |  | EBITDA(1) |  | 114.2 |  |  | 117.9 |  | (36.2 | ) |  | 232.0 |  |  | (18.4 | ) |  | Adjusted EBITDA(1) |  | 82.7 |  |  | 63.2 |  | 51.5 |  |  | 145.9 |  |  | 94.8 |  |  | Cash flow from operations |  | 90.3 |  |  | 65.4 |  | 14.7 |  |  | 155.7 |  |  | 31.9 |  |  | Net income (loss) |  | 71.0 |  |  | 80.6 |  | (53.4 | ) |  | 151.7 |  |  | (60.2 | ) |  | Net income (loss) attributable to owners |  | of the Company |  | 70.5 |  |  | 80.2 |  | (53.2 | ) |  | 150.8 |  |  | (60.4 | ) |  | Per share (basic) |  | 0.68 |  |  | 0.77 |  | (0.52 | ) |  | 1.46 |  |  | (0.59 | ) |  | Per share (diluted) |  | 0.68 |  |  | 0.77 |  | (0.52 | ) |  | 1.45 |  |  | (0.59 | ) |  | Adjusted net income attributable to owners of the Company(1)
 |  | 
 48.1
 |  |  | 
 35.8
 |  | 
 18.6
 |  |  | 
 84.0
 |  |  | 
 35.4
 |  |  | Per share (basic) |  | 0.46 |  |  | 0.35 |  | 0.18 |  |  | 0.81 |  |  | 0.34 |  |  | Per share (diluted) |  | 0.46 |  |  | 0.35 |  | 0.18 |  |  | 0.81 |  |  | 0.34 |  |  | 
  
  
 Cash, cash equivalents, and short-term
 |  | investments |  | 68.3 |  |  | 80.6 |  | 44.8 |  |  | 68.3 |  |  | 44.8 |  |  | Working (deficit) capital(1) |  | (33.5 | ) |  | 10.2 |  | (57.6 | ) |  | (33.5 | ) |  | (57.6 | ) |  | Net debt(1) |  | 559.1 |  |  | 561.8 |  | 482.0 |  |  | 559.1 |  |  | 482.0 |  | 
 
 
 | (1) |  | EBITDA,  adjusted EBITDA, adjusted net income (loss) attributable to owners of  the Company, adjusted net income (loss) per share attributable to owners  of the Company, net (cash) debt, working capital, copper C1 cash cost,  copper C1 cash cost including foreign exchange hedges, gold C1 cash cost  and gold AISC are non-IFRS measures. These measures do not have a  standardized meaning prescribed by IFRS and might not be comparable to  similar financial measures disclosed by other issuers. Please refer to  the Company’s discussion of Non-IFRS measures in its Management’s  Discussion and Analysis for the three and six months ended June 30, 2025  and the Reconciliation of Non-IFRS Measures section at the end of this  press release. | 
 
 
 2025 PRODUCTION AND COST GUIDANCE
 
 Consolidated  copper production guidance for 2025 has been updated to 67,500 to  80,000 tonnes to reflect the slower-than-expected ramp up at the Tucumã  Operation, which achieved commercial production on July 1, 2025.  Consolidated copper production is expected to increase sequentially in  H2 2025 driven by higher mill throughput at the Tucumã Operation and  higher mined and processed volumes at the Caraíba Operations,  particularly at Pilar and Surubim.
 
 At  the Xavantina Operations, gold production guidance has been updated to  40,000 to 50,000 ounces to reflect lower-than-expected production in H1  2025. The Company expects investments in mine modernization and  mechanization to support sequential increases in mined and processed  volumes through the remainder of the year.
 
 
 
 
 |  | Original Guidance |  | Current Guidance |  | Copper Production (tonnes) |  |  | Caraíba Operations | 37,500 - 42,500 | 37,500 - 42,500 |  | Tucumã Operation | 37,500 - 42,500 | 30,000 - 37,500 |  | Total Copper | 75,000 - 85,000 | 67,500 - 80,000 |  | Copper C1 Cash Cost(1) Guidance |  |  |  | Caraíba Operations | $2.15 - $2.35 | $2.15 - $2.35 |  | Tucumã Operation | $1.05 - $1.25 | $1.10 - $1.30 |  | The Xavantina Operations |  |  |  |  | Au Production (ounces) | 50,000 - 60,000 |  | 40,000 - 50,000 |  | Gold C1 Cash Cost(1) Guidance | $650 - $800 |  | $850 - $1,000 |  | Gold AISC(1) Guidance | $1,400 - $1,600 |  | $1,800 - $2,000 | 
 
 Note:  Guidance is based on estimates and assumptions including, but not  limited to, mineral reserve estimates, grade and continuity of  interpreted geological formations and metallurgical recovery  performance. Please refer to the Company’s SEDAR+ and EDGAR filings,  including the most recent Annual Information Form ("AIF"), for a  detailed summary of risk factors.
 (1) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within the MD&A.
 
 2025 CAPITAL EXPENDITURE GUIDANCE
 
 Capital  expenditure guidance remains unchanged at a range of $230 to $270  million, excluding capitalized ramp-up costs prior to the declaration of  commercial production at the Tucumã Operation.
 
 Figures presented in the table below are in USD millions.
 
 
 
 
 | Caraíba Operations | $165 - $180 |  | Tucumã Operation(1) | $30 - $40 |  | Xavantina Operations | $25 - $35 |  | Furnas Copper-Gold Project and Other Exploration | $10 - $15 |  | Total | $230 - $270 | 
 
 Note:  Guidance is based on certain estimates and assumptions, including but  not limited to, mineral reserve estimates, grade and continuity of  interpreted geological formations and metallurgical performance. Please  refer to the Company’s most recent Annual Information Form and  Management of Risks and Uncertainties in the MD&A for complete risk  factors.
 (1) Excludes capitalized ramp-up costs prior to the declaration of commercial production at the Tucumã Operation.
 
 CONFERENCE CALL DETAILS
 
 The  Company will hold a conference call on Friday, August 1, 2025 at 11:30  am Eastern time (8:30 am Pacific time) to discuss these results. A  results presentation will be available for download via the webcast link  and in the Presentations section of the Company's website on the day of  the conference call.
 
 
 
 
 | Date: |  |  | Friday, August 1, 2025 |  | Time: |  |  | 11:30 am Eastern time (8:30 am Pacific time) |  | Dial in: |  |  | Canada/USA Toll Free: 1-833-752-3380 International: +1-647-846-2821
 
 Please dial in 5-10 minutes prior to the start of the call or pre-register
 using this  link to bypass the live operator queue.
 
 (https://dpregister.com/sreg/10200387/ff53d62cdc)
 |  | Webcast: |  |  | To access the webcast, click  here. (https://event.choruscall.com/mediaframe/webcast.html? webcastid=1vjDLcyB)
 |  | Replay: |  |  | Canada/USA: 1-855-669-9658, International: +1-412-317-0088 For country-specific dial-in numbers, click  here.
 
 (https://services.choruscall.com/ccforms/replay.html)
 |  | Replay Passcode:  4498533 | 
 
 
 Reconciliation of Non-IFRS Measures
 
 Financial  results of the Company are presented in accordance with IFRS. The  Company utilizes certain alternative performance (non-IFRS) measures to  monitor its performance, including copper C1 cash cost, copper C1 cash  cost including foreign exchange hedges, gold C1 cash cost, gold AISC,  EBITDA, adjusted EBITDA, adjusted net income attributable to owners of  the Company, adjusted net income per share, net (cash) debt, working  capital and available liquidity. These performance measures have no  standardized meaning prescribed within generally accepted accounting  principles under IFRS and, therefore, amounts presented may not be  comparable to similar measures presented by other mining companies.  These non-IFRS measures are intended to provide supplemental information  and should not be considered in isolation or as a substitute for  measures of performance prepared in accordance with IFRS.
 
 For  additional details please refer to the Company’s discussion of non-IFRS  and other performance measures in its Management’s Discussion and  Analysis for the three and six months ended June 30, 2025 which is  available on SEDAR+ at  www.sedarplus.ca, and on EDGAR at  www.sec.gov.
 
 Copper C1 cash cost and copper C1 cash cost including foreign exchange hedges
 
 The  following table provides a reconciliation of copper C1 cash cost to  cost of production, its most directly comparable IFRS measure.
 
 
 
 
 | Reconciliation: |  | 2025 - Q2 |  | 2025 - Q1 |  | 2024 - Q2 |  | 2025 - YTD |  | 2024 - YTD |  | Cost of production |  | $ | 46,890 |  |  | $ | 35,719 |  |  | $ | 41,945 |  |  | $ | 82,609 |  | $ | 84,172 |  |  | Add (less): |  |  |  |  |  |  |  |  |  |  | Transportation costs & other |  |  | 1,792 |  |  |  | 1,322 |  |  |  | 1,283 |  |  |  | 3,114 |  |  | 2,535 |  |  | Treatment, refining, and other |  |  | 2,340 |  |  |  | 2,410 |  |  |  | 4,058 |  |  |  | 4,750 |  |  | 9,228 |  |  | By-product credits |  |  | (6,205 | ) |  |  | (4,699 | ) |  |  | (3,431 | ) |  |  | (10,904 | ) |  | (5,871 | ) |  | Incentive payments |  |  | (1,457 | ) |  |  | (1,289 | ) |  |  | (1,174 | ) |  |  | (2,746 | ) |  | (2,373 | ) |  | Net change in inventory |  |  | (1,611 | ) |  |  | 2,659 |  |  |  | (468 | ) |  |  | 1,048 |  |  | (4,361 | ) |  | Foreign exchange translation and other |  |  | 16 |  |  |  | (147 | ) |  |  | 21 |  |  |  | (131 | ) |  | 14 |  |  | C1 cash costs(1) |  |  | 41,765 |  |  |  | 35,975 |  |  |  | 42,234 |  |  |  | 77,740 |  |  | 83,344 |  |  | (Gain) loss on foreign exchange hedges |  |  | (217 | ) |  |  | 2,216 |  |  |  | 46 |  |  |  | 1,999 |  |  | (230 | ) |  | 
 C1 cash costs including foreign exchange hedges
 |  | 
 $
 | 
 41,548
 |  |  | 
 $
 | 
 38,191
 |  |  | 
 $
 | 
 42,280
 |  |  | 
 $
 | 
 79,739
 |  | 
 $
 | 
 83,114
 |  |  | 
 Mining
 |  | 
 $
 | 
 31,442
 |  |  | 
 $
 | 
 25,796
 |  |  | 
 $
 | 
 27,881
 |  |  | 
 $
 | 
 57,238
 |  | 
 $
 | 
 53,137
 |  |  | Processing |  |  | 6,549 |  |  |  | 6,352 |  |  |  | 7,927 |  |  |  | 12,901 |  |  | 15,104 |  |  | Indirect |  |  | 7,639 |  |  |  | 6,116 |  |  |  | 5,799 |  |  |  | 13,755 |  |  | 11,746 |  |  | Production costs |  |  | 45,630 |  |  |  | 38,264 |  |  |  | 41,607 |  |  |  | 83,894 |  |  | 79,987 |  |  | By-product credits |  |  | (6,205 | ) |  |  | (4,699 | ) |  |  | (3,431 | ) |  |  | (10,904 | ) |  | (5,871 | ) |  | Treatment, refining and other |  |  | 2,340 |  |  |  | 2,410 |  |  |  | 4,058 |  |  |  | 4,750 |  |  | 9,228 |  |  | C1 cash costs(1) |  |  | 41,765 |  |  |  | 35,975 |  |  |  | 42,234 |  |  |  | 77,740 |  |  | 83,344 |  |  | (Gain) loss on foreign exchange hedges |  |  | (217 | ) |  |  | 2,216 |  |  |  | 46 |  |  |  | 1,999 |  |  | (230 | ) |  | C1 cash costs including foreign exchange hedges |  | $ | 41,548 |  |  |  | 38,191 |  |  |  | 42,280 |  |  |  | 79,739 |  |  | 83,114 |  | 
 
 (1)  Copper C1 cash costs for 2025 and 2024 do not include Tucumã  Operation's results, as commercial production has not been achieved as  of June 30, 2025.
 
 
 
 
 |  |  | 2025 - Q2 |  | 2025 - Q1 |  | 2024 - Q2 |  | 2025 - YTD |  | 2024 - YTD |  | Costs per pound |  |  |  |  |  |  |  |  |  |  |  | Total copper produced (lbs, 000) |  |  | 20,199 |  |  |  | 16,219 |  |  |  | 19,548 |  |  |  | 36,418 |  |  |  | 37,386 |  |  | 
 Mining
 |  | 
 $
 | 
 1.56
 |  |  | 
 $
 | 
 1.59
 |  |  | 
 $
 | 
 1.42
 |  |  | 
 $
 | 
 1.57
 |  |  | 
 $
 | 
 1.42
 |  |  | Processing |  | $ | 0.32 |  |  | $ | 0.39 |  |  | $ | 0.41 |  |  | $ | 0.35 |  |  | $ | 0.41 |  |  | Indirect |  | $ | 0.38 |  |  | $ | 0.38 |  |  | $ | 0.30 |  |  | $ | 0.38 |  |  | $ | 0.31 |  |  | By-product credits |  | $ | (0.31 | ) |  | $ | (0.29 | ) |  | $ | (0.18 | ) |  | $ | (0.30 | ) |  | $ | (0.16 | ) |  | Treatment, refining and other |  | $ | 0.12 |  |  | $ | 0.15 |  |  | $ | 0.21 |  |  | $ | 0.13 |  |  | $ | 0.25 |  |  | Copper C1 cash costs(1) |  | $ | 2.07 |  |  | $ | 2.22 |  |  | $ | 2.16 |  |  | $ | 2.13 |  |  | $ | 2.23 |  |  | (Gain) loss on foreign exchange hedges |  | $ | (0.01 | ) |  | $ | 0.14 |  |  | $ | — |  |  | $ | 0.06 |  |  | $ | (0.01 | ) |  | Copper C1 cash costs including foreign exchange hedges
 |  | $ | 2.06 |  |  | $ | 2.36 |  |  | $ | 2.16 |  |  | $ | 2.19 |  |  | $ | 2.22 |  | 
 
 
 
 (1)Copper  C1 cash costs for 2025 and 2024 do not include Tucumã Operation's  results, as commercial production has not been achieved as of June 30,  2025.
 
 Gold C1 cash cost and gold AISC
 
 The  following table provides a reconciliation of gold C1 cash cost and gold  AISC to cost of production, its most directly comparable IFRS measure.
 
 
 
 
 | Reconciliation: |  | 2025 - Q2 |  | 2025 - Q1 |  | 2024 - Q2 | 2025 - YTD |  | 2024 - YTD |  | Cost of production |  | $ | 8,761 |  |  | $ | 6,225 |  |  | $ | 7,580 |  | $ | 14,986 |  |  | $ | 14,835 |  |  | Add (less): |  |  |  |  |  |  |  |  |  |  | Incentive payments |  |  | (209 | ) |  |  | (269 | ) |  |  | (226 | ) |  | (478 | ) |  |  | (669 | ) |  | Net change in inventory |  |  | 63 |  |  |  | 1,339 |  |  |  | (322 | ) |  | 1,402 |  |  |  | (58 | ) |  | By-product credits |  |  | (159 | ) |  |  | (111 | ) |  |  | (259 | ) |  | (270 | ) |  |  | (448 | ) |  | Smelting and refining |  |  | 42 |  |  |  | 35 |  |  |  | 97 |  |  | 77 |  |  |  | 187 |  |  | Foreign exchange translation and other |  |  | 133 |  |  |  | 82 |  |  |  | 215 |  |  | 215 |  |  |  | 447 |  |  | C1 cash costs |  | $ | 8,631 |  |  | $ | 7,301 |  |  | $ | 7,085 |  | $ | 15,932 |  |  | $ | 14,294 |  |  | Site general and administrative |  |  | 1,264 |  |  |  | 1,077 |  |  |  | 1,350 |  |  | 2,341 |  |  |  | 2,703 |  |  | Accretion of mine closure and rehabilitation |  |  |  |  |  |  |  |  |  |  | provision |  | 145 |  |  | 141 |  |  | 88 |  |  | 286 |  |  | 180 |  |  | Sustaining capital expenditure |  | 4,435 |  |  | 3,909 |  |  | 2,653 |  |  | 8,344 |  |  | 5,907 |  |  | Sustaining lease payments |  | 2,313 |  |  | 2,021 |  |  | 1,908 |  |  | 4,334 |  |  | 4,030 |  |  | Royalties and production taxes |  | 511 |  |  | 338 |  |  | 862 |  |  | 849 |  |  | 1,372 |  |  | AISC | $ | 17,299 |  | $ | 14,787 |  | $ | 13,946 |  | $ | 32,086 |  | $ | 28,486 |  | 
 
 
 |  | 2025 - Q2 | 2025 - Q1 | 2024 - Q2 | 2025 - YTD | 2024 - YTD |  | Costs |  |  |  |  |  |  | Mining | $ | 4,552 |  | $ | 3,760 |  | $ | 3,705 |  | $ | 8,312 |  | $ | 7,525 |  |  | Processing |  | 2,472 |  |  | 2,206 |  |  | 2,277 |  |  | 4,678 |  |  | 4,536 |  |  | Indirect |  | 1,724 |  |  | 1,411 |  |  | 1,265 |  |  | 3,135 |  |  | 2,494 |  |  | Production costs |  | 8,748 |  |  | 7,377 |  |  | 7,247 |  |  | 16,125 |  |  | 14,555 |  |  | Smelting and refining costs |  | 42 |  |  | 35 |  |  | 97 |  |  | 77 |  |  | 187 |  |  | By-product credits |  | (159 | ) |  | (111 | ) |  | (259 | ) |  | (270 | ) |  | (448 | ) |  | C1 cash costs | $ | 8,631 |  | $ | 7,301 |  | $ | 7,085 |  | $ | 15,932 |  | $ | 14,294 |  |  | Site general and administrative |  | 1,264 |  |  | 1,077 |  |  | 1,350 |  |  | 2,341 |  |  | 2,703 |  |  | Accretion of mine closure and rehabilitation provision |  | 
 145
 |  |  | 
 141
 |  |  | 
 88
 |  |  | 
 286
 |  |  | 
 180
 |  |  | Sustaining capital expenditure |  | 4,435 |  |  | 3,909 |  |  | 2,653 |  |  | 8,344 |  |  | 5,907 |  |  | Sustaining leases |  | 2,313 |  |  | 2,021 |  |  | 1,908 |  |  | 4,334 |  |  | 4,030 |  |  | Royalties and production taxes |  | 511 |  |  | 338 |  |  | 862 |  |  | 849 |  |  | 1,372 |  |  | AISC | $ | 17,299 |  | $ | 14,787 |  | $ | 13,946 |  | $ | 32,086 |  | $ | 28,486 |  |  | Costs per ounce |  |  |  |  |  |  | Total gold produced (ounces) |  | 7,743 |  |  | 6,638 |  |  | 16,555 |  |  | 14,381 |  |  | 34,789 |  |  | Mining
 | $
 | 588
 |  | $
 | 566
 |  | $
 | 224
 |  | $
 | 578
 |  | $
 | 216
 |  |  | Processing | $ | 319 |  | $ | 332 |  | $ | 138 |  | $ | 325 |  | $ | 130 |  |  | Indirect | $ | 223 |  | $ | 213 |  | $ | 76 |  | $ | 218 |  | $ | 72 |  |  | Smelting and refining | $ | 5 |  | $ | 5 |  | $ | 6 |  | $ | 5 |  | $ | 5 |  |  | By-product credits | $ | (20 | ) | $ | (16 | ) | $ | (16 | ) | $ | (18 | ) | $ | (12 | ) |  | Gold C1 cash cost | $ | 1,115 |  | $ | 1,100 |  | $ | 428 |  | $ | 1,108 |  | $ | 411 |  |  | Gold AISC | $ | 2,234 |  | $ | 2,228 |  | $ | 842 |  | $ | 2,231 |  | $ | 819 |  | 
 
 
 
 Earnings before interest, taxes, depreciation and amortization (EBITDA) and Adjusted EBITDA
 
 The  following table provides a reconciliation of EBITDA and Adjusted EBITDA  to net income, its most directly comparable IFRS measure.
 
 
 
 
 | Reconciliation: |  | 2025 - Q2 |  | 2025 - Q1 |  | 2024 - Q2 | 2025 - YTD |  | 2024 - YTD |  | Net Income (Loss) |  | $ | 71,028 |  |  | $ | 80,627 |  |  | $ | (53,399 | ) | $ | 151,655 |  |  | $ | (60,229 | ) |  | Adjustments: |  |  |  |  |  |  |  |  |  |  | Finance expense |  |  | 5,976 |  |  |  | 4,723 |  |  |  | 4,565 |  |  | 10,699 |  |  |  | 9,199 |  |  | Finance income |  |  | (1,130 | ) |  |  | (838 | ) |  |  | (1,361 | ) |  | (1,968 | ) |  |  | (2,829 | ) |  | Income tax expense (recovery) |  |  | 13,082 |  |  |  | 14,741 |  |  |  | (8,267 | ) |  | 27,823 |  |  |  | (10,120 | ) |  | Amortization and depreciation |  |  | 25,215 |  |  |  | 18,620 |  |  |  | 22,294 |  |  | 43,835 |  |  |  | 45,590 |  |  | EBITDA |  | $ | 114,171 |  |  | $ | 117,873 |  |  | $ | (36,168 | ) | $ | 232,044 |  |  | $ | (18,389 | ) |  | Foreign exchange (gain) loss |  |  | (38,640 | ) |  |  | (58,400 | ) |  |  | 70,454 |  |  | (97,040 | ) |  |  | 89,450 |  |  | Share based compensation |  |  | 7,756 |  |  |  | 1,173 |  |  |  | 6,075 |  |  | 8,929 |  |  |  | 12,620 |  |  | Unrealized (gain) loss on commodity derivatives |  |  | (636 | ) |  |  | 2,102 |  |  |  | 436 |  |  | 1,466 |  |  |  | 372 |  |  | Write-down of exploration and evaluation asset |  |  | — |  |  |  | — |  |  |  | 10,745 |  |  | — |  |  |  | 10,745 |  |  | Xavantina Gold Stream transaction fees |  |  | — |  |  |  | 458 |  |  |  | — |  |  | 458 |  |  |  | — |  |  | Adjusted EBITDA |  | $ | 82,651 |  |  | $ | 63,206 |  |  | $ | 51,542 |  | $ | 145,857 |  |  | $ | 94,798 |  | 
 
 
 | (1) |  | Change  in rehabilitation and closure provision relates to revisions to  rehabilitation and closure plans and cost estimates at the Company’s  historic mining operations that have entered the closure phase, and for  which there are no substantive future economic value. Such costs are  reflected within other expenses on the Company's Consolidated Statements  of Operations and Comprehensive (Loss) Income. | 
 
 
 Adjusted  net income attributable to owners of the Company and Adjusted net  income per share attributable to owners of the Company
 
 The  following table provides a reconciliation of Adjusted net income  attributable to owners of the Company and Adjusted EPS to net income  attributable to the owners of the Company, its most directly comparable  IFRS measure.
 
 
 
 
 | Reconciliation: | 2025 - Q2 | 2025 - Q1 | 2024 - Q2 | 2025 - YTD | 2024 - YTD |  | Net income (loss) as reported attributable to the owners of the Company
 | $ | 70,548 |  | $ | 80,227 |  | $ | (53,247 | ) | $ | 150,775 |  | $ | (60,388 | ) |  | Adjustments: |  |  |  |  |  |  | Share based compensation |  | 7,756 |  |  | 1,173 |  |  | 6,075 |  |  | 8,929 |  |  | 12,620 |  |  | Unrealized foreign exchange (gain) loss on |  |  |  |  |  |  | USD denominated balances in MCSA |  | (28,204 | ) |  | (39,628 | ) |  | 48,517 |  |  | (67,832 | ) |  | 59,774 |  |  | Unrealized foreign exchange (gain) loss on |  |  |  |  |  |  | foreign exchange derivative contracts |  | (6,606 | ) |  | (16,739 | ) |  | 16,006 |  |  | (23,345 | ) |  | 25,310 |  |  | Unrealized (gain) loss on commodity derivatives |  | (633
 | )
 |  | 2,079
 |  |  | 434
 |  |  | 1,446
 |  |  | 370
 |  |  | Incremental COVID-19 costs |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | Change in rehabilitation and closure provision(1) |  | 
 —
 |  |  | 
 —
 |  |  | 
 —
 |  |  | 
 —
 |  |  | 
 —
 |  |  | Write-down of exploration and evaluation asset |  | —
 |  |  | —
 |  |  | 10,745
 |  |  | —
 |  |  | 10,745
 |  |  | Xavantina Gold Stream transaction fees |  | — |  |  | 458 |  |  | — |  |  | 458 |  |  | — |  |  | Tax effect on the above adjustments |  | 5,281 |  |  | 8,279 |  |  | (9,904 | ) |  | 13,560 |  |  | (13,032 | ) |  | Adjusted net income attributable to owners of the Company | $ | 48,142 |  | $ | 35,849 |  | $ | 18,626 |  | $
 | 83,991 |  | $ | 35,399 |  |  | 
 Weighted average number of common shares
 |  |  |  |  |  |  | Basic |  | 103,582,082 |  |  | 103,564,654 |  |  | 103,082,363 |  |  | 103,573,416 |  |  | 102,918,092 |  |  | Diluted |  | 103,905,561 |  |  | 103,904,737 |  |  | 103,961,615 |  |  | 103,902,012 |  |  | 103,704,730 |  |  | 
 Adjusted EPS
 |  |  |  |  |  |  | Basic | $ | 0.46 |  | $ | 0.35 |  | $ | 0.18 |  | $ | 0.81 |  | $ | 0.34 |  |  | Diluted | $ | 0.46 |  | $ | 0.35 |  | $ | 0.18 |  | $ | 0.81 |  | $ | 0.34 |  | 
 
 
 | (1) |  | Change  in rehabilitation and closure provision relates to revisions to  rehabilitation and closure plans and cost estimates at the Company’s  historic mining operations that have entered the closure phase, and for  which there are no substantive future economic value. Such costs are  reflected within other expenses on the Company's Consolidated Statements  of Operations and Comprehensive (Loss) Income. | 
 
 
 Net Debt (Cash)
 
 The  following table provides a calculation of net debt (cash) based on  amounts presented in the Company’s condensed consolidated interim  financial statements as at the periods presented.
 
 
 
 
 |  | June 30, 2025
 |  | March 31, 2025
 |  | December 31, 2024
 |  | June 30, 2024
 |  | Current portion of loans and borrowings | $ | 58,076 |  |  | $ | 52,479 |  |  | $ | 45,893 |  |  | $ | 39,889 |  |  | Long-term portion of loans and borrowings |  | 569,300 |  |  |  | 589,860 |  |  |  | 556,296 |  |  |  | 486,919 |  |  | Less: |  |  |  |  |  |  |  |  | Cash and cash equivalents |  | (68,303 | ) |  |  | (80,573 | ) |  |  | (50,402 | ) |  |  | (44,773 | ) |  | Short-term investments |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  | Net debt (cash) | $ | 559,073 |  |  | $ | 561,766 |  |  | $ | 551,787 |  |  | $ | 482,035 |  | 
 
 
 Working Capital and Available Liquidity
 
 The  following table provides a calculation for these based on amounts  presented in the Company’s condensed consolidated interim financial  statements as at the periods presented.
 
 
 
 
 |  |  | June 30, 2025
 |  |  | March 31, 2025
 |  |  | December 31, 2024
 |  | June 30, 2024
 |  | Current assets | $ | 178,524 |  | $ | 232,292 |  | $ | 141,790 |  | $ | 124,554 |  |  | Less: Current liabilities |  | (212,010) |  |  | (222,048) |  |  | (211,706) |  |  | (182,143 | ) |  | Working (deficit) capital | $ | (33,486) |  | $ | 10,244 |  | $ | (69,916) |  | $ | (57,589 | ) |  | Cash and cash equivalents
 |  | 68,303 |  |  | 80,573 |  |  | 50,402 |  |  | 44,773 |  |  | Available undrawn revolving credit facilities(1) |  | 45,000 |  |  | 35,000 |  |  | 15,000 |  |  | 100,000 |  |  | Available undrawn prepayment facilities(2) |  | — |  |  | — |  |  | 25,000 |  | $ | 25,000 |  |  | Available liquidity | $ | 113,303 |  | $ | 115,573 |  | $ | 90,402 |  | $ | 169,773 |  | 
 
 
 | (1) | In  January 2025, the Company amended its Senior Credit Facility to  increase the limit from $150.0 million to $200.0 million and extended  the maturity from December 2026 to December 2028. |  |  | (2) | In  March 2025, the Company exercised its option to increase the size of  its copper prepayment facility from $50.0 million to $75.0 million. | 
 
 ABOUT ERO COPPER CORP
 
 Ero  Copper is a high-margin, high-growth copper producer with operations in  Brazil and corporate headquarters in Vancouver, B.C. The Company's  primary asset is a 99.6% interest in the Brazilian copper mining  company, Mineração Caraíba S.A. ("MCSA"), 100% owner of the Company's  Caraíba Operations, which are located in the Curaçá Valley, Bahia State,  Brazil, and the Tucumã Operation, an open pit copper mine located in  Pará State, Brazil. The Company also owns 97.6% of NX Gold S.A. ("NX  Gold") which owns the Xavantina Operations, an operating gold mine  located in Mato Grosso State, Brazil. In July 2024, the Company signed a  definitive earn-in agreement with Vale Base Metals for a 60% interest  in the Furnas Copper-Gold Project, located in the Carajás Mineral  Province in Pará State, Brazil. For more information on the earn-in  agreement, please see the Company's press releases dated October 30,  2023 and July 22, 2024. Additional information on the Company and its  operations, including technical reports on the Caraíba Operations,  Xavantina Operations, Tucumã Operation and the Furnas Copper-Gold  Project, can be found on the Company’s website ( www.erocopper.com), on SEDAR+ (https://www.globenewswire.com/Tracker?data=p0AWixKvfXISsHjvo0mWKk0jkV8utv7i8SNe6poEZWJqtsl9oodCu3QMYwg36-rk7oHlzZN7BFY9AVjKr-n0VvEMHPVS4UJgtqbDuNvmivdVErztBP9i89siVdpvzFC7kOYWG8KEUyK5ynEtrFfBzQ== and on EDGAR ( www.sec.gov). The Company’s shares are publicly traded on the Toronto Stock Exchange and the New York Stock Exchange under the symbol “ERO”.
 
 FOR MORE INFORMATION, PLEASE CONTACT
 
 Farooq Hamed, VP, Investor Relations  info@erocopper.com
 
 CAUTION REGARDING FORWARD LOOKING INFORMATION AND STATEMENTS
 
 This  press release contains “forward-looking statements” within the meaning  of the United States Private Securities Litigation Reform Act of 1995  and “forward-looking information” within the meaning of applicable  Canadian securities legislation (collectively, “forward-looking  statements”). Forward-looking statements include statements that use  forward-looking terminology such as “may”, “could”, “would”, “will”,  “should”, “intend”, “target”, “plan”, “expect”, “budget”, “estimate”,  “forecast”, “schedule”, “anticipate”, “believe”, “continue”,  “potential”, “view” or the negative or grammatical variation thereof or  other variations thereof or comparable terminology. Forward-looking  statements may include, but are not limited to, statements with respect  to the Company's expected development and mining rates, production,  operating costs and capital expenditures at the Caraíba Operations, the  Tucumã Operation and the Xavantina Operations; estimated timing for  certain milestones, including the step change in mining rates at  Xavantina in H2 2025; expectations related to exploration activities at  the Furnas Project including the expected timing of the completion of  the Phase 2 drill program by year-end 2025; and any other statement that  may predict, forecast, indicate or imply future plans, intentions,  levels of activity, results, performance or achievements.
 
 Forward-looking  statements are subject to a variety of known and unknown risks,  uncertainties and other factors that could cause actual results,  actions, events, conditions, performance or achievements to materially  differ from those expressed or implied by the forward-looking  statements, including, without limitation, risks discussed in this press  release and in the Company’s Annual Information Form for the year ended  December 31, 2023 (“AIF”) under the heading “Risk Factors”. The risks  discussed in this press release and in the AIF are not exhaustive of the  factors that may affect any of the Company’s forward-looking  statements. Although the Company has attempted to identify important  factors that could cause actual results, actions, events, conditions,  performance or achievements to differ materially from those contained in  forward-looking statements, there may be other factors that cause  results, actions, events, conditions, performance or achievements to  differ from those anticipated, estimated or intended.
 
 Forward-looking  statements are not a guarantee of future performance. There can be no  assurance that forward-looking statements will prove to be accurate, as  actual results and future events could differ materially from those  anticipated in such statements. Forward-looking statements involve  statements about the future and are inherently uncertain, and the  Company’s actual results, achievements or other future events or  conditions may differ materially from those reflected in the  forward-looking statements due to a variety of risks, uncertainties and  other factors, including, without limitation, those referred to herein  and in the AIF under the heading “Risk Factors”.
 
 The  Company’s forward-looking statements are based on the assumptions,  beliefs, expectations and opinions of management on the date the  statements are made, many of which may be difficult to predict and  beyond the Company’s control. In connection with the forward-looking  statements contained in this press release and in the AIF, the Company  has made certain assumptions about, among other things: favourable  equity and debt capital markets; the ability to raise any necessary  additional capital on reasonable terms to advance the production,  development and exploration of the Company’s properties and assets;  future prices of copper, gold and other metal prices; the timing and  results of exploration and drilling programs; the accuracy of any  mineral reserve and mineral resource estimates; the geology of the  Caraíba Operations, the Xavantina Operations, the Tucumã Operation and  the Furnas Copper-Gold Project being as described in the respective  technical report for each property; production costs; the accuracy of  budgeted exploration, development and construction costs and  expenditures; the price of other commodities such as fuel; future  currency exchange rates, interest rates and tariff rates; operating  conditions being favourable such that the Company is able to operate in a  safe, efficient and effective manner; work force continuing to remain  healthy in the face of prevailing epidemics, pandemics or other health  risks, political and regulatory stability; the receipt of governmental,  regulatory and third party approvals, licenses and permits on favourable  terms; obtaining required renewals for existing approvals, licenses and  permits on favourable terms; requirements under applicable laws;  sustained labour stability; stability in financial and capital goods  markets; availability of equipment; positive relations with local groups  and the Company’s ability to meet its obligations under its agreements  with such groups; and satisfying the terms and conditions of the  Company’s current loan arrangements. Although the Company believes that  the assumptions inherent in forward- looking statements are reasonable  as of the date of this press release, these assumptions are subject to  significant business, social, economic, political, regulatory,  competitive and other risks and uncertainties, contingencies and other  factors that could cause actual actions, events, conditions, results,  performance or achievements to be materially different from those  projected in the forward-looking statements. The Company cautions that  the foregoing list of assumptions is not exhaustive. Other events or  circumstances could cause actual results to differ materially from those  estimated or projected and expressed in, or implied by, the  forward-looking statements contained in this press release. There can be  no assurance that forward-looking statements will prove to be accurate,  as actual results and future events could differ materially from those  anticipated in such statements. Accordingly, readers should not place  undue reliance on forward-looking statements.
 
 Forward-looking  statements contained herein are made as of the date of this press  release and the Company disclaims any obligation to update or revise any  forward-looking statement, whether as a result of new information,  future events or results or otherwise, except as and to the extent  required by applicable securities laws.
 
 CAUTIONARY NOTES REGARDING MINERAL RESOURCE AND MINERAL RESERVE ESTIMATES
 
 Unless  otherwise indicated, all reserve and resource estimates included in  this press release and the documents incorporated by reference herein  have been prepared in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects (“NI  43-101") and the Canadian Institute of Mining, Metallurgy and Petroleum  (the “CIM”) — CIM Definition Standards on Mineral Resources and Mineral  Reserves, adopted by the CIM Council, as amended (the “CIM Standards”).  NI 43-101 is a rule developed by the Canadian Securities Administrators  that establishes standards for all public disclosure an issuer makes of  scientific and technical information concerning mineral projects.  Canadian standards, including NI 43-101, differ significantly from the  requirements of the United States Securities and Exchange Commission  (the “SEC”), and reserve and resource information included herein may  not be comparable to similar information disclosed by U.S. companies. In  particular, and without limiting the generality of the foregoing, this  press release and the documents incorporated by reference herein use the  terms “measured resources,” “indicated resources” and “inferred  resources” as defined in accordance with NI 43-101 and the CIM  Standards.
 
 Further to  recent amendments, mineral property disclosure requirements in the  United States (the “U.S. Rules”) are governed by subpart 1300 of  Regulation S-K of the U.S. Securities Act of 1933, as amended (the “U.S.  Securities Act”) which differ from the CIM Standards. As a foreign  private issuer that is eligible to file reports with the SEC pursuant to  the multi-jurisdictional disclosure system (the “MJDS”), Ero is not  required to provide disclosure on its mineral properties under the U.S.  Rules and will continue to provide disclosure under NI 43-101 and the  CIM Standards. If Ero ceases to be a foreign private issuer or loses its  eligibility to file its annual report on Form 40-F pursuant to the  MJDS, then Ero will be subject to the U.S. Rules, which differ from the  requirements of NI 43-101 and the CIM Standards.
 
 Pursuant  to the new U.S. Rules, the SEC recognizes estimates of “measured  mineral resources”, “indicated mineral resources” and “inferred mineral  resources”. In addition, the definitions of “proven mineral reserves”  and “probable mineral reserves” under the U.S. Rules are now  “substantially similar” to the corresponding standards under NI 43-101.  Mineralization described using these terms has a greater amount of  uncertainty as to its existence and feasibility than mineralization that  has been characterized as reserves. Accordingly, U.S. investors are  cautioned not to assume that any measured mineral resources, indicated  mineral resources, or inferred mineral resources that Ero reports are or  will be economically or legally mineable. Further, “inferred mineral  resources” have a greater amount of uncertainty as to their existence  and as to whether they can be mined legally or economically. Under  Canadian securities laws, estimates of “inferred mineral resources” may  not form the basis of feasibility or pre-feasibility studies, except in  rare cases. While the above terms under the U.S. Rules are  “substantially similar” to the standards under NI 43-101 and CIM  Standards, there are differences in the definitions under the U.S. Rules  and CIM Standards. Accordingly, there is no assurance any mineral  reserves or mineral resources that Ero may report as “proven mineral  reserves”, “probable mineral reserves”, “measured mineral resources”,  “indicated mineral resources” and “inferred mineral resources” under NI  43-101 would be the same had Ero prepared the reserve or resource  estimates under the standards adopted under the U.S. Rules.
 |