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Ero Copper Reports Fourth Quarter and Full Year 2023 Operating and Financial Results

Financials

Ero Copper Reports Fourth Quarter and Full Year 2023 Operating and

Financial Results

(all amounts in US dollars, unless otherwise noted)

VANCOUVER, British Columbia, March 07, 2024 -- Ero Copper Corp. (TSX: ERO, NYSE: ERO) (“Ero” or the “Company”) is

pleased to announce its operating and financial results for the three and twelve months ended December 31, 2023.

Management will host a conference call tomorrow, Friday, March 8, 2024, 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

• Fourth quarter copper production was 11,760 tonnes, bringing full-year copper production to 43,857 tonnes

• Copper C1 cash costs(*) for the quarter and year were $1.75 and $1.80, respectively. Including the benefit of realized

gains on designated foreign exchange hedges, fourth quarter and full-year copper C1 cash costs(*) were $1.59 and

$1.68, respectively

• Fourth quarter gold production was 16,867 ounces, contributing to record full-year gold production of 59,222 ounces

• Gold C1 cash costs (*) for the quarter and year were $413 and $422, respectively. All-in Sustaining Costs ("AISC")(*) for

the same periods were $991 and $957, respectively

• Fourth quarter and full-year financial results reflect the continued execution of the Company's growth initiatives,

including completion of the NX60 initiative, which resulted in record full-year operating margins at the Xavantina

Operations

◦ Net income attributable to the owners of the Company for the quarter and year were $36.5 million and $92.8

million, respectively, or $0.37 and $0.98, respectively, per share on a diluted basis

◦ Adjusted net income attributable to the owners of the Company (*) for the quarter and year were $20.7 million and

$82.8 million, respectively, or $0.21 and $0.87, respectively, per share on a diluted basis

◦ Fourth quarter and full-year adjusted EBITDA(*) were $50.3 million and $183.5 million, respectively 

(*) 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 year ended December 31, 2023 and the Reconciliation of Non-IFRS Measures

section at the end of this press release.

• The Company achieved significant milestones across its organic growth projects

◦ Construction of the Tucumã Project progressed significantly, reaching over 90% physical completion as of

February 2024. With production of copper concentrate on schedule to commence in H2 2024, the Company's

transition from construction to commissioning is underway. The total direct project capital estimate remains

unchanged at approximately $310 million

◦ The Caraíba mill expansion, which is expected to increase mill throughput capacity from 3.2 to 4.2 million

tonnes per annum, was completed in December 2023 with design capacity achieved by year-end

◦ Following the completion of surface infrastructure, the main shaft sinking phase for the Pilar Mine's new external

shaft commenced as planned in December 2023. The new external shaft component of the Pilar 3.0 initiative is

fully contracted, and projected capital expenditures are within budget

• During the quarter, amid an uncertain macroeconomic climate, the Company's management team prudently elected to

fortify its balance sheet with a bought deal equity financing. Net proceeds from the transaction of $104.3 million

contributed to available liquidity at year-end of $261.7 million, including cash and cash equivalents of $111.7 million and

$150.0 million of undrawn availability under the Company's senior secured revolving credit facility

• The Company is reaffirming its 2024 production, operating cost, and capital expenditure guidance

"2023 was a cornerstone year in advancing our growth strategy," stated David Strang, Chief Executive Officer. "Our

investments over the past few years position us well for the future at both the Xavantina Operations, where we successfully

completed the NX60 initiative, and at the Caraíba Operations with the completion of our mill expansion and the excellent

progress made on the new external shaft for the Pilar Mine.”

"However, the most significant transformation in our consolidated production profile and cash flows is projected to begin in the

second half of this year when production is scheduled to commence at the Tucumã Project. With physical completion at over

90% and capital expenditures on the project starting to wind down, we are approaching an exciting inflection point when we

expect to see these investments begin to yield strong shareholder returns."

FOURTH QUARTER AND FULL YEAR 2023 REVIEW

• Mining & Milling Operations

◦ The Caraíba Operations processed 3.2 million tonnes of ore grading 1.49% copper, producing 43,857 tonnes of

copper in concentrate for the year after metallurgical recoveries of 91.4%

◾ Higher mill throughput volumes and processed copper grades during the fourth quarter resulted in copper

production of 11,760 tonnes in concentrate, representing an increase of 9.2% compared to the third

quarter

◾ Full-year mill throughput volumes increased 12.8%, partially offsetting the impact of a planned decrease

in mined and processed copper grades compared to 2022

◦ The Xavantina Operations processed 136,002 tonnes of ore grading 15.13 grams per tonne, producing a record

59,222 ounces of gold in 2023 after metallurgical recoveries of 89.5%

◾ Fourth quarter processed gold grades continued to exceed expectations, averaging 17.18 grams per

tonne and resulting in production of 16,867 ounces for the quarter

◾ The successful completion of the NX60 initiative contributed to increases in processed gold grades and

gold production of 98.8% and 38.8%, respectively, compared to 2022

• Organic Growth Projects

◦ The Company continued to make significant construction progress at its Tucumã Project, achieving over 90%

physical completion as of February 2024. With production of copper concentrate on schedule to commence in

H2 2024, the Company's transition from construction to commissioning is underway. Key milestones include:

◾ Site fully energized in January 2024 following commissioning of the main substation and completion of the

16-kilometer power line tie-in with the national grid

◾ Pre-stripping activities continue to track ahead of schedule with approximately 25,000 tonnes of sulphide

ore stockpiled for process plant commissioning as at the end of February 2024

◾ Mechanical completion and sub-component commissioning (lubrication, hydraulic, electrical,

instrumentation and automation systems) continues to progress on schedule

◾ Dry commissioning of the crushing circuit, encompassing the primary and secondary crushers as well as

screening and conveyance systems, was completed in February 2024, approximately one month ahead

of schedule

◾ The total direct project capital estimate remains approximately $310 million

◾ To date, the Tucumã Project has recorded no lost-time injuries with over three million hours of work

completed since 2022

◦ At the Caraíba Operations, the Company made important advancements on its Pilar 3.0 initiative during the

quarter. This initiative aims to transform the Pilar Mine into a two-mine system capable of sustaining annual ore

production levels of approximately 3.0 million tonnes

◾ The Caraíba mill expansion, which is expected to increase mill throughput capacity from 3.2 to 4.2 million

tonnes per annum, was successfully completed in December 2023 with design capacity achieved by year

-end

◾ Following the completion of the head-frame, winders and supporting surface infrastructure, the main shaft

sinking phase for the Pilar Mine's new external shaft commenced as planned in December 2023. The new

external shaft component of the Pilar 3.0 initiative is fully contracted, and projected capital expenditures

are within budget

◦ The Xavantina Operations' NX60 initiative was successfully completed in 2023. As a result, the Company

achieved record gold production for the year and expects to sustain annual gold production levels of 55,000 to

60,000 ounces moving forward

OPERATING AND FINANCIAL HIGHLIGHTS

    2023 - Q4   2023 - Q3   2022 - Q4   2023   2022

Operating Information               

Copper (Caraíba Operations)               

Ore Processed (tonnes)     812,202    806,096    745,850    3,231,667    2,864,230

Grade (% Cu)     1.59    1.46    1.84    1.49    1.76

Cu Production (tonnes)     11,760    10,766    12,664    43,857    46,371

Cu Production (000 lbs)     25,926    23,734    27,918    96,688    102,230

Cu Sold in Concentrate (tonnes)     11,429    10,090    13,301    42,595    46,816

Cu Sold in Concentrate (000 lbs)     25,197    22,244    29,323    93,906    103,211

Cu C1 cash cost (1)(2)  $ 1.75 $ 1.92 $ 1.59 $ 1.80 $ 1.55

Gold (Xavantina Operations)               

Ore Processed (tonnes)     34,416    31,446    39,715    136,002    189,743

Grade (g / tonne)     17.18    18.72    10.17    15.13    7.61

Au Production (oz)     16,867    17,579    11,786    59,222    42,669

Au C1 cash cost (1)  $ 413 $ 371 $ 445 $ 422 $ 560

Au AISC(1)  $ 991 $ 844 $ 1,096 $ 957 $ 1,124

Financial Highlights ($ in millions, except per share amounts)         

Revenues  $ 116.4 $ 105.2 $ 116.7 $ 427.5 $ 426.4

Gross profit     41.9    35.5    52.7    156.8    187.2

EBITDA(1)     73.7    28.3    53.6    208.7    208.3

Adjusted EBITDA(1)     50.3    42.9    53.2    183.5    198.3

Cash flow from operations     49.4    41.9    34.0    163.1    143.4

Net income     37.1    2.8     22.5    94.3    103.1

Net income attributable to owners of the

Company     36.5    2.5     22.2    92.8    101.8

Per share (basic)     0.37    0.03    0.24    0.99    1.12

Per share (diluted)     0.37    0.03    0.24    0.98    1.10

Adjusted net income attributable to owners

of the Company(1)     20.7    17.3    22.2    82.8    83.5

Per share (basic)     0.21    0.19    0.24    0.88    0.92

Per share (diluted)     0.21    0.18    0.24    0.87    0.91

Cash, cash equivalents, and short-term

investments     111.7    87.6    317.4    111.7    317.4

Working capital(1)     25.7    32.8    263.3    25.7    263.3

Net (cash) debt(1)     314.5    331.8    100.7    314.5    100.7

(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 year ended December 31, 2023 and the Reconciliation of Non-

IFRS Measures section at the end of this press release.

(2) Copper C1 cash cost including foreign exchange hedges (per lb) in Q4 2023 and Fiscal 2023 were $1.59 and $1.68, respectively, compared to $1.59 in Q4 2022 and $1.67

in Fiscal 2022.

2024 PRODUCTION AND COST GUIDANCE(*)

The Company's 2024 production guidance reflects the ongoing execution of its organic growth strategy, including the

successful completion of the Xavantina Operations' NX60 initiative as well as the anticipated completion of the Tucumã Project,

which remains on track to commence production in H2 2024. As a result, the Company expects to deliver consolidated copper

production of 59,000 to 72,000 tonnes in concentrate and gold production of 55,000 to 60,000 ounces.

The Company's 2024 copper C1 cash cost guidance on a consolidated basis is $1.50 to $1.75. This range incorporates

several key updates relative to previous 2024 C1 cash cost projections, including a revised copper C1 cash cost calculation

methodology, as detailed in the Company's press release dated February 21, 2024.

At the Xavantina Operations, the gold C1 cash cost guidance range of $550 to $650 reflects improved fixed cost efficiencies

driven by higher expected gold production, partially offsetting the impact of planned decreases to mined and processed gold

grades. The gold AISC guidance range for 2024 is $1,050 to $1,150.

The Company's updated cost guidance for 2024 assumes a foreign exchange rate of 5.00 BRL per USD, a gold price of $1,900

per ounce and a silver price of $23.00 per ounce.

Consolidated Copper Production (tonnes)    

Caraíba Operations   42,000 - 47,000

Tucumã Operations   17,000 - 25,000

Total   59,000 - 72,000

Consolidated Copper C1 Cash Costs(1) Guidance    

Caraíba Operations   $1.80 - $2.00

Tucumã Operations   $0.90 - $1.10

Total   $1.50 - $1.75

The Xavantina Operations    

Au Production (ounces)   55,000 - 60,000

Gold C1 Cash Cost(1) Guidance   $550 - $650

Gold AISC(1) Guidance   $1,050 - $1,150

*  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) Please refer to the section titled "Alternative Performance (Non-IFRS) Measures" within the MD&A.

2024 CAPITAL EXPENDITURE GUIDANCE(*)

2024 capital expenditures are expected to decrease to a range of $299 to $349 million due to the anticipated completion of the

Tucumã Project, which is on track to commence production in the H2 2024. As a result, capital spend is expected to be

weighted towards H1 2024.

The Company's capital expenditure guidance includes an estimated $30 to $40 million allocated to consolidated exploration

programs. This allocation includes approximately $20 million designated for drilling activities at the Caraíba Operations,

including expenditures related to the Curaçá Valley nickel exploration program. Additionally, the Company has budgeted

approximately $6 million for the first phase of work at the Furnas Project.

Capital expenditure guidance assumes an exchange rate of 5.10 USD:BRL for the Tucumã Project based on designated

foreign exchange hedges with a weighted average ceiling and floor of 5.10 and 5.23 USD:BRL, respectively. All other capital

expenditures assume an exchange rate of 5.00 USD:BRL. Figures presented below are in USD millions.

Caraíba Operations    

Growth   $80 - $90

Sustaining   $100 - $110

Total, Caraíba Operations   $180 - $200

Tucumã Project    

Growth   $65 - $75

Capitalized Ramp-Up Costs   $4 - $6

Sustaining   $2 - $5

Total, Tucumã Project   $71 - $86

Xavantina Operations    

Growth   $3 - $5

Sustaining   $15 - $18

Total, Xavantina Operations   $18 - $23

Consolidated Exploration Programs   $30 - $40

Company Total    

Growth   $148 - $170

Capitalized Ramp-Up Costs   $4 - $6

Sustaining   $117 - $133

Exploration   $30 - $40

Total, Company   $299 - $349

(*) 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.

CONFERENCE CALL DETAILS

The Company will hold a conference call on Friday, March 8, 2024 at 11:30 am Eastern time (8:30 am Pacific time) to discuss

these results.

Date: Friday, March 8, 2024

Time: 11:30 am Eastern time (8:30 am Pacific time)

Dial in: North America: 1-800-319-4610, International: +1-604-638-5340

please dial in 5-10 minutes prior and ask to join the call

Pre-Register: Registration link (pre-register to bypass the live operator queue)

Replay: North America: 1-800-319-6413, International: +1-604-638-9010

Replay Passcode: 0675

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 year ended December 31, 2023 which is available on SEDAR at

www.sedar.com 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:   2023 - Q4   2023 - Q3   2022 - Q4    2023     2022  

Cost of production  $ 39,790  $ 39,345  $ 40,067  $ 153,187  $ 146,292 

Add (less):               

Transportation costs & other     1,853     1,614     2,362     6,539     9,019 

Treatment, refining, and other     7,332     6,574     9,989     28,323     36,156 

By-product credits     (3,394)     (3,022)     (6,103)     (12,930)     (22,282)

Incentive payments     (1,693)     (1,609)     (1,092)     (5,668)     (3,914)

Net change in inventory     1,434     2,835     (861)     4,407     (6,040)

Foreign exchange translation and

other     20     (171)     (47)     (149)     373 

C1 cash costs     45,342     45,566     44,315     173,709     159,604 

(Gain) loss on foreign exchange

hedges     (4,185)     (3,458)     (78)     (11,417)     12,498 

C1 cash costs including foreign

exchange hedges  $ 41,157  $ 42,108  $ 44,237  $ 162,292  $ 172,102 

Mining  $ 26,646  $ 27,258  $ 26,433  $ 102,908  $ 94,086 

Processing     8,177     8,362     8,033     30,736     30,155 

Indirect     6,581     6,394     5,963     24,672     21,489 

Production costs     41,404     42,014     40,429     158,316     145,730 

By-product credits     (3,394)     (3,022)     (6,103)     (12,930)     (22,282)

Treatment, refining and other     7,332     6,574     9,989     28,323     36,156 

C1 cash costs     45,342     45,566     44,315     173,709     159,604 

(Gain) loss on foreign exchange

hedges     (4,185)     (3,458)     (78)     (11,417)     12,498 

C1 cash costs including foreign

exchange hedges  $ 41,157  $ 42,108  $ 44,237  $ 162,292  $ 172,102 

Costs per pound               

Payable copper produced (lb, 000)     25,926     23,734     27,918     96,688     102,230 

Mining  $ 1.03  $ 1.15  $ 0.95  $ 1.06  $ 0.92 

Processing  $ 0.32  $ 0.35  $ 0.29  $ 0.32  $ 0.29 

Indirect  $ 0.25  $ 0.27  $ 0.21  $ 0.26  $ 0.21 

By-product credits  $ (0.13)  $ (0.13)  $ (0.22)  $ (0.13)  $ (0.22)

Treatment, refining and other  $ 0.28  $ 0.28  $ 0.36  $ 0.29  $ 0.35 

Copper C1 cash cost  $ 1.75  $ 1.92  $ 1.59  $ 1.80  $ 1.55 

(Gain) loss on foreign exchange

hedges  $ (0.16)  $ (0.15)  $ —   $ (0.12)  $ 0.12 

Copper C1 cash costs including

foreign exchange hedges  $ 1.59  $ 1.77  $ 1.59  $ 1.68  $ 1.67 

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:   2023 - Q4   2023 - Q3   2022 - Q4    2023     2022  

Cost of production  $ 7,122  $ 6,323  $ 4,834  $ 25,209  $ 24,768 

Add (less):               

Incentive payments     (386)     (320)     (167)     (1,424)     (1,117)

Net change in inventory     65     213     258     862     (119)

By-product credits     (248)     (240)     (199)     (827)     (613)

Smelting and refining costs     113     101     61     353     234 

Foreign exchange translation

and other     296     453     462     806     742 

C1 cash costs  $ 6,962  $ 6,530  $ 5,249  $ 24,979  $ 23,895 

Site general and administrative     1,492     1,304     1,196     5,366     3,648 

Accretion of mine closure and

rehabilitation provision     111     112     106     439     436 

Sustaining capital expenditure     5,499     4,258     4,547     16,300     14,638 

Sustaining leases     1,861     1,832     1,559     7,093     4,311 

Royalties and production taxes     785     808     262     2,487     1,041 

AISC  $ 16,710  $ 14,844  $ 12,919  $ 56,664  $ 47,969 

Costs               

Mining  $ 3,430  $ 3,140  $ 2,311  $ 12,154  $ 12,529 

Processing     2,315     2,165     2,067     8,433     7,917 

Indirect     1,352     1,364     1,009     4,866     3,828 

Production costs     7,097     6,669     5,387     25,453     24,274 

Smelting and refining costs     113     101     61     353     234 

By-product credits     (248)     (240)     (199)     (827)     (613)

C1 cash costs  $ 6,962  $ 6,530  $ 5,249  $ 24,979  $ 23,895 

Site general and administrative     1,492     1,304     1,196     5,366     3,648 

Accretion of mine closure and

rehabilitation provision     111     112     106     439     436 

Sustaining capital expenditure     5,499     4,258     4,547     16,300     14,638 

Sustaining leases     1,861     1,832     1,559     7,093     4,311 

Royalties and production taxes     785     808     262     2,487     1,041 

AISC  $ 16,710  $ 14,844  $ 12,919  $ 56,664  $ 47,969 

Costs per ounce               

Payable gold produced (ounces)     16,867     17,579     11,786     59,222     42,669 

Mining  $ 203  $ 179  $ 196  $ 205  $ 294 

Processing  $ 137  $ 123  $ 175  $ 142  $ 186 

Indirect  $ 80  $ 78  $ 86  $ 82  $ 90 

Smelting and refining  $ 7  $ 6  $ 5  $ 6  $ 5 

By-product credits  $ (14)  $ (15)  $ (17)  $ (13)  $ (15)

Gold C1 cash cost  $ 413  $ 371  $ 445  $ 422  $ 560 

Gold AISC  $ 991  $ 844  $ 1,096  $ 957  $ 1,124 

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:   2023 - Q4   2023 - Q3   2022 - Q4    2023     2022  

Net Income  $ 37,052  $ 2,811  $ 22,472  $ 94,304  $ 103,067 

Adjustments:               

Finance expense     5,284     8,017     12,290     25,822     33,223 

Finance income     (1,989)     (2,976)     (5,041)     (12,465)     (10,295)

Income tax expense (recovery)     8,415     (807)     7,540     18,047     23,316 

Amortization and depreciation     24,980     21,299     16,361     83,024     58,969 

EBITDA  $ 73,742  $ 28,344  $ 53,622  $ 208,732  $ 208,280 

Foreign exchange (gain) loss     (24,871)     13,937     (4,569)     (34,612)     (19,910)

Share based compensation     477     (1,185)     4,123     9,218     7,931 

Unrealized loss (gain) on copper

derivative contracts     955     1,814     —      115     —  

Incremental COVID-19 costs     —      —      —      —      1,956 

Adjusted EBITDA  $ 50,303  $ 42,910  $ 53,176  $ 183,453  $ 198,257 

Note: In 2023 Q3, EBITDA has been updated to incorporate the adjustment of finance income. EBITDA and Adjusted EBITDA for comparative periods have been updated

accordingly.

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:   2023 - Q4   2023 - Q3   2022 - Q4    2023     2022  

Net income as reported attributable

to the owners of the Company  $ 36,549  $ 2,525  $ 22,159  $ 92,804  $ 101,831 

Adjustments:               

Share based compensation     477     (1,185)     4,123     9,218     7,931 

Unrealized foreign exchange (gain)

loss on USD denominated balances

in MCSA     (10,308)     9,481     (1,782)     (15,296)     25 

Unrealized foreign exchange (gain)

loss on foreign exchange derivative

contracts     (9,852)     7,530     (3,017)     (7,552)     (32,960)

Unrealized loss on interest rate

derivative contracts     951     1,808     —      115     —  

Incremental COVID-19 costs     —      —      —      —      1,944 

Tax effect on the above adjustments     2,932     (2,873)     731     3,472     4,726 

Adjusted net income attributable to

owners of the Company  $ 20,749  $ 17,286  $ 22,214  $ 82,761  $ 83,497 

Weighted average number of

common shares               

Basic     98,099,791     93,311,434     91,522,358     94,111,548     90,789,925 

Diluted     98,482,755     94,009,268     92,551,916     94,896,334     92,170,656 

Adjusted EPS               

Basic  $ 0.21  $ 0.19  $ 0.24  $ 0.88  $ 0.92 

Diluted  $ 0.21  $ 0.18  $ 0.24  $ 0.87  $ 0.91 

Net (Cash) Debt

The following table provides a calculation of net (cash) debt based on amounts presented in the Company’s consolidated

financial statements as at the periods presented.

December 31,

2023  

September 30,

2023  

December 31,

2022

Current portion of loans and borrowings $ 20,381  $ 11,764  $ 15,703 

Long-term portion of loans and borrowings   405,852     407,656     402,354 

Less:        

Cash and cash equivalents   (111,738)     (44,757)     (177,702)

Short-term investments   —      (42,843)     (139,700)

Net (cash) debt $ 314,495  $ 331,820  $ 100,655 

Working Capital and Available Liquidity

The following table provides a calculation for these based on amounts presented in the Company’s consolidated financial

statements as at the periods presented.

December 31,

2023  

September 30,

2023  

December 31,

2022

Current assets $ 199,487  $ 174,113  $ 392,427 

Less: Current liabilities   (173,800)     (141,284)     (129,121)

Working capital $ 25,687  $ 32,829  $ 263,306 

Cash and cash equivalents   111,738     44,757     177,702 

Short-term investments   —      42,843     139,700 

Available undrawn revolving credit facilities   150,000     150,000     75,000 

Available liquidity $ 261,738  $ 237,600  $ 392,402 

ABOUT ERO COPPER CORP

Ero is a high-margin, high-growth, low carbon-intensity 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 (formerly known as the MCSA Mining Complex),

which are located in the Curaçá Valley, Bahia State, Brazil and include the Pilar and Vermelhos underground mines and the

Surubim open pit mine, and the Tucumã Project (formerly known as Boa Esperança), an IOCG-type copper project located in

Pará, Brazil. The Company also owns 97.6% of NX Gold S.A. ("NX Gold") which owns the Xavantina Operations (formerly

known as the NX Gold Mine), comprised of an operating gold and silver mine located in Mato Grosso, Brazil. Additional

information on the Company and its operations, including technical reports on the Caraíba Operations, Xavantina Operations

and Tucumã Project, can be found on the Company's website (www.erocopper.com), on SEDAR+ (www.sedarplus.ca), 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

Courtney Lynn, SVP, Corporate Development, Investor Relations & Sustainability

(604) 335-7504

[email protected]

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 production, operating costs and capital expenditures at the Caraíba Operations, the

Tucumã Project and the Xavantina Operations; estimated completion dates for certain milestones, including initial production

at the Tucumã Project; the ability of the Company to achieve copper production levels as currently projected at the Tucumã

Project; the commencement of, and budget for, the first phase of work pursuant to the Furnas Project earn-in agreement and

execution of the definitive earn-in agreement with Vale Base Metals in accordance with the terms of the binding letter of intent;

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.