Buenaventura Announces Fourth Quarter and Full Year 2017 Results

Transcription

1 Buenaventura Announces Fourth Quarter and Full Year 217 Results Lima, Peru, February 27, 218 Compañia de Minas Buenaventura S.A.A. ( Buenaventura or the Company ) (NYSE: BVN; Lima Stock Exchange: BUE.LM), Peru s largest publicly-traded precious metals mining company, today announced results for the fourth quarter (4Q17) and full year (FY17) period ended December 31, 217. All figures have been prepared in accordance with IFRS (International Financial Reporting Standards) on a non-gaap basis and are stated in U.S. dollars (US$). Fourth Quarter and Full Year 217 Highlights: 4Q17 EBITDA from direct operations was US$ million; a 44% increase compared to US$ 8.8 million reported in 4Q16. 4Q17 Adjusted EBITDA (including associated companies) reached US$ million; a 38% increase compared to US$ million in 4Q16. FY217 Net Income was US$ 6.8 million, compared to negative US$ in 216. Buenaventura s Net debt/ebitda ratio was reduced to 1.4x. The Company s de-bottlenecking program is in progress, with results expected to be gradually reflected from Yanacocha purchased the International Finance Corporation s five percent equity stake in Yanacocha for $48 million in December 217. In 218, Yanacocha agreed to make a capital reduction, Buenaventura s stake in Yanacocha therefore increased to 45.95%, from 43.65%. In June 217, Cerro Verde extended the maturity of its Syndicated Loan to 222 and in December 217, Cerro Verde repaid US$ 22 million. The outstanding balance is therefore US $1.3 billion as of December 31, 217. In line with Buenaventura s dividend policy, a dividend payment of US$.3 per share/ads will be declared. Financial Highlights (in millions of US$, except EPS figures): 4Q17 4Q16 Var% FY17 FY16 Var% Total Revenues % 1, , % Operating Profit* % % EBITDA Direct Operations Adjusted EBITDA (Inc Associates) % % % % Net Income N.A N.A. EPS** N.A N.A. (*) Considers an impairment of Long-Lived Assets of US$21.6 million (La Zanja) and adjustment of component of stripping cost of 13.6 million (EL Brocal). (**) as of December 31, 217 Buenaventura had a weighted average number of shares outstanding of 253,715,19. Contacts in Lima: Contacts in NY: Leandro Garcia, Chief Financial Officer Barbara Cano (511) (646) barbara@inspirgroup.com Rodrigo Echecopar, Investor Relations Coordinator (511) / rodrigo.echecopar@buenaventura.pe Company Website:

2 Fourth Quarter 217 Results Page 2 of 26 Operating Revenues 4Q17 net sales were US$ million; a 3% increase compared to US$ million reported in 4Q16. This result was primarily due to higher volumes sold of gold (42% increase QoQ), silver (5% increase QoQ) and lead (3% increase QoQ) as well as to higher prices of gold (11% increase QoQ), zinc (32% increase QoQ) and copper (24% increase QoQ), but lower silver prices (8% decrease QoQ). Royalty income decreased 12%; from US$ 5.8 million in 4Q16 to US$ 5.1 million in 4Q17 due to a 12% decrease in revenues at Yanacocha. Operating Highlights 4Q17 4Q16 Var% FY17 FY16 Var% Net Sales (in millions of US$) Average Realized Gold Price (US$/oz) (1) (2) % 1, ,44.5 2% 1,274 1,149 11% 1,268 1,244 2% Average Realized Gold Price (US$/oz) inc. Affiliates (3) 1,273 1,179 8% 1,26 1,245 1% Average Realized Silver Price (US$/oz) (1) (2) Average Realized Lead Price (US$/MT) (1) (2) Average Realized Zinc Price (US$/MT) (1) (2) Average Realized Copper Price (US$/MT) (1) (2) % % 2,516 2,335 8% 2,372 1,978 2% 3,498 2,641 32% 3,46 2,267 34% 6,914 5,568 24% 6,28 4,919 28% Volume Sold 4Q17 4Q16 Var% FY17 FY16 Var% Consolidated Gold Oz 1 122,85 85,836 42% 43,48 354,116 14% Gold Oz inc Associated Companies 3 198,25 171,484 16% 698, ,649 1% Consolidated Silver Oz 1 6,228,219 5,938,481 5% 24,773,278 21,863,19 13% Consolidated Lead MT 1 1,833 8,34 3% 4,32 29,678 35% Consolidated Zinc MT 1 16,36 19,963-2% 61,724 62,829-2% Consolidated Copper MT 1 11,64 12,779-9% 42,756 45,674-6% (1) Buenaventura s Direct Operations includes 1% of Buenaventura s operating units, 1% of La Zanja and 1% of El Brocal. (2) The realized price considers the adjustments of quotational periods. (3) Considers 1% of Buenaventura s operating units, 1% of La Zanja, 1% of El Brocal, 4.95% of Coimolache and 43.65% of Yanacocha.

3 Fourth Quarter 217 Results Page 3 of 26 Production and Operating Costs In 4Q17, Buenaventura s consolidated gold production was 114,325 ounces; a 32% quarter on quarter increase as compared to 86,83 gold ounces in 4Q16. This increase is due to new production from Tambomayo and a 9% QoQ increase in production at Orcopampa, which was offset by a 6% QoQ decrease in production at La Zanja mine. Consolidated lead production increased by 31% compared to 4Q16 due to a 92% increase in production at the Uchucchacua mine and a 12% increase at the El Brocal mines. Buenaventura s FY17 consolidated gold production increased 14% compared to FY16. Consolidated silver production increased by 8% as compared to FY16, primarily due to an additional 1.8 million ounces in production contributed by Tambomayo and a 55% increase in production at El Brocal. Buenaventura s consolidated lead production increased 33% in the FY17 compared to FY16. This total increase is due to a 56% increase in production from the Uchucchacua mine and a 58% increase in production from the El Brocal mines. Equity Production 4Q17 4Q16 Var% FY17 FY16 Var % Gold Oz Direct Operations (1) 97,639 68,268 43% 337,26 281,86 2% Gold Oz including Associated (2) Companies 174, ,212 1% 631, ,434 1% Silver Oz Direct Operations (1) 6,218,877 6,19,374 2% 24,912,786 23,448,833 6% Silver Oz including Associated Companies 6,626,625 6,382,558 4% 26,433,729 24,672,571 7% Lead MT 1,25 7,396 38% 37,12 28,531 3% Zinc MT 14,299 15,646-9% 54,635 51,465 6% Copper MT Direct Operations (1) Copper MT including Associated Companies 7,446 8,218-9% 27,846 29,195-5% 3,227 34,222-12% 122, ,584-4% Consolidated Production 4Q17 4Q16 Var% FY17 FY16 Gold Oz (3) 114,325 86,83 32% 45, ,367 14% Silver Oz (3) 6,662,963 6,624,276 1% 26,624,431 24,648,761 8% Lead MT (3) 12,62 9,174 31% 44,976 33,85 33% Zinc MT (3) 18,47 23,896-23% 74,56 75,75-1% Copper MT (3) 12,127 13,929-13% 45,289 49,46-8% Var % (1) Buenaventura s Direct Operations includes 1% of Buenaventura s operating units, 53.6% of La Zanja and 61.43% of El Brocal. (2) Based on 1% of Buenaventura s operating units, 53.6% of La Zanja, 61.43% of el Brocal, 4.95% of Coimolache and 43.65% of Yanacocha. (3) Based on 1% of Buenaventura s operating units, 1% of La Zanja and 1% of El Brocal.

4 Fourth Quarter 217 Results Page 4 of 26 Tambomayo (1% owned by Buenaventura) Production Gold Oz 27,65 64,175 Silver Oz 814,12 1,788,219 Cost Applicable to Sales Gold US$/Oz Tambomayo began commercial operation in August will be Tambomayo s first full year operating at full capacity. Gold production guidance for 218 is 11k 13k ounces and silver production guidance is 3.M 3.5M ounces. Orcopampa (1% owned by Buenaventura) Production Gold Oz 5,56 45,973 9% 19, ,12 % Silver Oz 14, ,59-47% 528, ,318-24% Cost Applicable to Sales Gold US$/Oz % % 4Q17 gold production at Orcopampa increased mainly due to a 13% QoQ increase in volume of ore treated. 4Q17 Cost Applicable to Sales (CAS) decreased 4%, to 738 US$/Oz, compared to 772 US$/Oz in 4Q16, mainly due to lower meters drifted (8% decrease QoQ). Gold production guidance for 218 is 19k 21k ounces. Uchucchacua (1% owned by Buenaventura)* Production Silver Oz 4,129,464 4,42,722 2% 16,583,698 16,212,746 2% Zinc MT 4,318 1,662 16% 13,4 7,227 8% Lead MT 5,493 2,855 92% 16,78 1,724 56% Cost Applicable to Sales Silver US$/Oz % % 4Q17 silver production at Uchucchacua was in line with 4Q16. 4Q17 Cost Applicable to Sales (CAS) of 9.84 US$/Oz was 15% lower than US$/Oz in 4Q16, primarily explained by a higher byproduct contribution (97% higher volume of lead sold and 194% higher volume of zinc sold) and lower exploration expenses. Silver production guidance for 218 is 17.2 million 18.6 million ounces.

5 Fourth Quarter 217 Results Page 5 of 26 *4Q17 production includes 15,23 Ag Oz, 263 Zn MT and 292 Pb MT of production from Uchucchacua s material treated at Mallay s processing plant. Mallay (1% owned by Buenaventura) Production Silver Oz 192,4 374,756-49% 1,19,382 1,627,246-32% Zinc MT 1,281 2,326-45% 7,12 1,463-32% Lead MT 62 1,476-59% 4,61 7,383-45% Cost Applicable to Sales Silver US$/Oz % % Mallay silver, lead and zinc production decreased in 4Q17 in order to accommodate production of Uchucchacua s ore (higher value). Silver production guidance for 218 from Mallay s mining operation is.4 million.5 million ounces. Julcani (1% owned by Buenaventura) Production Silver Oz 292,358 79,618-63% 2,249,527 3,264,42-31% Cost Applicable to Sales Silver US$/Oz % % 4Q17 silver production decreased 63% QoQ primarily due to a 61% QoQ decrease in ore treated and to lower ore grades (6% QoQ). 4Q17 Cost Applicable to Sales (CAS) of 3.25 US$/Oz was 142% higher than 12.5 US$/Oz in 4Q16, primarily explained by decrease in volume sold. Julcani is currently in the process of strengthening its mining procedures in order to improve safety and increase profitability. Moving forward, volume treated will be reduced and production will focus on areas with higher ore grades. Silver production guidance for 218 is 2.1 million 2.4 million ounces. La Zanja (53.6% owned by Buenaventura) Production Gold Oz 3,648 32,739-6% 127, ,724-9% Silver Oz 82,97 58,279 42% 28,98 217,292 29% Cost Applicable to Sales Gold US$/Oz % %

6 Fourth Quarter 217 Results Page 6 of 26 4Q17 gold production decreased by 6% quarter on quarter but was in line with the 217 mine production plan. 4Q17 Cost Applicable to Sales (CAS) was 875 US$/Oz; a 19% increase compared to 736 US$/Oz in 4Q16, mainly due to an accounting reclassification of US$ 3.6M (Back Fill construction). Gold production guidance for 218 is 7k 8k ounces. Coimolache (4.1% owned by Buenaventura) Production Gold Oz 45,164 39,926 13% 151,454 15,816 % Silver Oz 263, , % 8, ,337 13% Cost Applicable to Sales Gold US$/Oz % % 4Q17 gold production increased by 13% quarter on quarter, in line with what was announced at the beginning of the year. 4Q17 Cost Applicable to Sales (CAS) increased by 4%, compared to 534 US$/Oz in 4Q16, mainly due to a higher stripping ratio (.419 in 4Q17 vs..261 in 4Q16). Gold production guidance for 218 is 16k 18k ounces. El Brocal (61.43% owned by Buenaventura) Production Copper MT 12,13 13,858-13% 45,97 49,17-8% Zinc MT 1,785 19,98-46% 51,511 57,385-1% Silver Oz 1,47,414 1,158,392-1% 4,84,249 2,634,739 55% Cost Applicable to Sales Copper US$/MT 5,468 4,354 26% 5,119 4,651 1% Zinc US$/MT 2,59 1,853 11% 1,915 1,88 6% 4Q17 copper production decreased 13% compared to 4Q16, mainly due to lower ore grades (11% decrease QoQ). In 4Q17, zinc production decreased 46% compared to 4Q16, primarily due to a reduction in the amount of ore treated (24% decrease QoQ). In 4Q17, zinc Cost Applicable to Sales (CAS) increased 11% quarter on quarter, mainly due to a decrease in zinc volume sold. Copper CAS in 4Q17 increased by 26% quarter on quarter due to an increase in meters drifted in order to prepare Marcapunta to mine 13K MTPD. Zinc production guidance for 218 is 43k 5k MT, while copper production guidance for 218 is 61k 71k MT.

7 Fourth Quarter 217 Results Page 7 of 26 General and Administrative Expenses 4Q17 General and Administrative expenses were US$22.7 million; 4% lower than $23.6 million in 4Q16, primarily due to a reduction in the provision for allowance for doubtful accounts. Exploration in Non-Operating Areas 4Q17 Exploration costs in Non-Operating Areas were US$6. million compared with US$11.8 million in 4Q16. During the period, Buenaventura focused its exploration efforts primarily on Yumpaq (US$2.7 million), the Marcapunta Norte (US$.48 million), the Emperatriz area in La Zanja (US$.28 million) and on the Luciana area in La Zanja (US$.27 million). Share in Associated Companies During 4Q17, Buenaventura s share in associated companies was US$4.3 million, compared to negative US$42.5 million reported in 4Q16, comprised of: Share in the Result of Associates (in millions of US$) Cerro Verde % % Coimolache % % Yanacocha % % Total N.A % YANACOCHA At Yanacocha (45.95% owned by Buenaventura), 4Q17 gold production was 134,291 ounces; 58,618 ounces of which were attributable to Buenaventura. This represents a 22% decrease as compared to the 171,675 ounces produced in 4Q16, of which 74,936 ounces are attributable to Buenaventura. For FY17, gold production was 534,692; an 18% decrease as compared to 654,933 ounces in FY16. Gold production guidance at Yanacocha for 218 is 47k 545k ounces. In 4Q17, Yanacocha reported a net loss of US$15.4 million, compared to a net loss of US$988.6 million reported in 4Q16. Yanacocha s 4Q16 net loss includes a US$889.4 million non-cash impairment; US$ million of which is attributable to Buenaventura. CAS in 4Q17 was US$ 797/oz; a 4% decrease as compared to the US$ 829/oz reported in 4Q16. Capital expenditures at Yanacocha were US$ 19.3 million in 4Q17 and US$ 53.7 million in FY17. Quecher Main The Quecher Main project (oxide deposit) is currently in its Execution Stage. First production is expected in early 219 with commercial production expected in the fourth quarter of 219. The Quecher Main project extends the life of the Yanacocha operation until 227, with average annual

8 Fourth Quarter 217 Results Page 8 of 26 gold production of 2, ounces per year expected between 22 and 225. Cost applicable to sales (CAS) is expected to be between US$ 75 and US$ 85 per ounce and AISC between US$ 9 and US$ 1,. CAPEX for the project is expected to be between US$ 25 and US$ 3 million (US$ 8 US$ 9 million in 218). Yanacocha purchased the IFC s five percent equity stake in Yanacocha Yanacocha purchased the International Finance Corporation s (IFC) five percent equity stake in Yanacocha for $48 million in December 217. The purchase was made using Yanacocha s existing cash balance. In 218, Yanacocha agreed to make a capital reduction, Buenaventura s stake in Yanacocha therefore increased to 45.95%, from 43.65%. CERRO VERDE At Cerro Verde (19.58% owned by Buenaventura), 4Q17 copper production was 116,351 MT, 22,782 MT of which is attributable to Buenaventura; a 12% decrease compared to 132,814 in 4Q16 with 26,5 MT attributable to Buenaventura. FY17 copper production was 481,81 MT; a 4% decrease as compared to 52,495 MT in FY216. During 4Q17, Cerro Verde reported a net income of US$ million compared to net income of US$ million in 4Q16. This increase was primarily due to a US$ 15. increase in net sales, primarily related to an increase in average realized copper price to US$ 3.46 per pound in 4Q17, compared to US$ 2.72 in 4Q16. During 4Q17, Cerro Verde s concentrator plant averaged 374k metric tons of ore per day, the plant was originally designed for a plant capacity of 36k metric tons per day. Capital expenditures at Cerro Verde were US$58.1 million in 4Q17 and US$152.8 million in FY17. In June 217, Cerro Verde extended the maturity of its Syndicated Loan until 222, from 219 under the prior agreement. In December 217, Cerro Verde repaid US$ 22 million of this loan. The outstanding balance is therefore US$ 1.3 billion as of December 31, 217. Copper production guidance at Cerro Verde for 218 is 46k MT 5k MT. COIMOLACHE (Tantahuatay operation) At Coimolache (4.1% owned by Buenaventura), 4Q17 attributable contribution to net income was US$ 7.7 million, as compared to US$ 6.5 million in 4Q16. In February 218, Coimolache signed a contract with Cerro Corona (Gold Fields) to purchase oxide material. Based on this agreement, Coimolache will purchase 6.6 million metric tons of ore at US$ 5.5 per tonne over a three-year period.

9 Fourth Quarter 217 Results Page 9 of 26 De-bottlenecking program As previously mentioned, the Company s De-Bottlenecking Program will continue for the subsequent three years. During 218 the program will focus on the following: Opportunity Tambomayo Orcopampa Uchucchacua El Brocal* Differential Cut-off Dilution Control Ventilation Hoist System Backfill System Integrated Mining Contract Process Plant Fine Tuning *At El Brocal this also considers the Esperanza Tunnel Connection and the 13K Copper Project Projects description Process Efficiency: Dilution Control: Operating cost reduction through the treatment of higher-value ore; increased production also improves recovery rate. Ventilation: system upgrade to increase productivity and improve exploration. Hoist System: system upgrade to increase productivity. Back-fill System: Reuse tailings to be mixed with cement to support and reinforce the mine. This also reduces costs incurred transporting the tailings to the tailings storage facility and increases the useful life of the storage facility. Process Plant Fine Tuning: Equipment to be purchased to improve process efficiency. Esperanza Tunnel Connection: Marcapunta Norte and Marcapunta Sur have been connected in order to improve operational productivity and reduce cost. Management Efficiency: Differential Cut-off: use of a clearly delineated cut-off per area to increase profitability. Integrated Mining Contracts: Renegotiate contracts with contractors in order to better leverage synergies between Buenaventura s operating units. Other Buenaventura s Board of Directors passed the following resolution at the Company s February 27, 218 Board meeting: Call for the Annual Shareholders Meeting to be held on March 27, 218 with the following items proposed for approval: a. Approval of the Annual Report as of December 31, 217. b. Approval of the Financial Statements as of December 31, 217. c. Propose Ernst and Young (Paredes, Burga y Asociados) as External Auditors for fiscal year 217. d. Declaration of a cash dividend of US$.3 per share or ADS, payable on May 4, 218.

10 Fourth Quarter 217 Results Page 1 of 26 *** Company Description Compañía de Minas Buenaventura S.A.A. is Peru s largest, publicly traded, precious metals company and a major holder of mining rights in Peru. The Company is engaged in the mining, processing, development and exploration of gold and silver and other metals via wholly owned mines as well as through its participation in joint exploration projects. Buenaventura currently operates several mines in Peru (Orcopampa*, Uchucchacua*, Mallay*, Julcani*, El Brocal, La Zanja and Coimolache and is developing the Tambomayo project. The Company owns 45.95% of Minera Yanacocha S.R.L (a partnership with Newmont Mining Corporation), an important precious metal producer; 19.58% of Sociedad Minera Cerro Verde, an important Peruvian copper producer. For a printed version of the Company s 216 Form 2-F, please contact the investor relations contacts on page 1 of this report, or download the PDF format file from the Company s web site at (*) Operations wholly owned by Buenaventura Note on Forward-Looking Statements This press release may contain forward-looking information (as defined in the U.S. Private Securities Litigation Reform Act of 1995) that involve risks and uncertainties, including those concerning the Company s, Yanacocha s and Cerro Verde s costs and expenses, results of exploration, the continued improving efficiency of operations, prevailing market prices of gold, silver, copper and other metals mined, the success of joint ventures, estimates of future explorations, development and production, subsidiaries plans for capital expenditures, estimates of reserves and Peruvian political, economic, social and legal developments. These forward-looking statements reflect the Company s view with respect to the Company s, Yanacocha s and Cerro Verde s future financial performance. Actual results could differ materially from those projected in the forwardlooking statements as a result of a variety of factors discussed elsewhere in this Press Release. APPENDIX 1 **Tables to follow** Equity Participation in Subsidiaries and Associates (as of December 31, 217) BVN Equity % Operating Mines / Business El Molle Verde S.A.C* 1. Trapiche Project Minera La Zanja S.A* 53.6 La Zanja Sociedad Minera El Brocal S.A.A* Colquijirca and Marcapunta Compañía Minera Coimolache S.A ** 4.1 Tantahuatay Minera Yanacocha S.R.L ** *** Yanacocha Sociedad Minera Cerro Verde S.A.A ** Cerro Verde Processadora Industrial Rio Seco S.A* 1. Rio Seco chemical plant Consorcio Energético de Huancavelica S.A* 1. Energy Huanza Hydroelectrical plant Buenaventura Ingenieros S.A* 1. Engineering Consultant (*)Consolidates (**) Equity Accounting (***) As of 218 the Equity Participation is 45.95%.

11 Fourth Quarter 217 Results Page 11 of 26 APPENDIX 2 Gold Production Mining Unit Operating Results Unit 4Q17 4Q16 % FY17 FY16 % Underground Ore Milled DMT 132, , Tambomayo Ore Grade Oz/MT Recovery Rate % Ounces Produced* Oz 27, , Ore Milled DMT 128, ,723 13% 5,58 464,366 8% Orcopampa Ore Grade Oz/MT % % Recovery Rate % % % Ounces Produced* Oz 5,56 45,973 9% 19, ,12 % Open Pit La Zanja Ounces Produced Oz 3,648 32,739-6% 127, ,724-9% Tantahuatay Ounces Produced Oz 45,164 39,926 13% 151,454 15,816 % (*) Includes ounces from retreatment of tailing dams Silver Production Mining Unit Operating Results Unit 4Q17 4Q16 % FY17 FY16 % Underground Ore Milled DMT 132, , Tambomayo Ore Grade Oz/MT Recovery Rate % Ounces Produced Oz 814, ,788, Ore Milled DMT 325, ,291 % 1,364,478 1,267,752 8% Uchucchacua Ore Grade Oz/MT % % Recovery Rate % % % Ounces Produced Oz 4,129,464 4,42,722 2% 16,583,698 16,212,746 2% Ore Milled DMT 16,729 42,44-61% 13, ,865-25% Julcani Ore Grade Oz/MT % % Recovery Rate % % % Ounces Produced Oz 292,358 79,618-63% 2,249,527 3,264,42-31% Ore Milled DMT 31,296 51,613-39% 17,519 24,35-16% Mallay Ore Grade Oz/MT % % Recovery Rate % % % Ounces Produced Oz 192,4 374,756-49% 1,19,382 1,627,246-32% Ore Milled DMT 687, ,519-1% 2,517,673 2,597,926-3% Marcapunta Ore Grade Oz/MT % % Recovery Rate % % % Ounces Produced Oz 326,142 26,696 25% 1,52, ,497 32% Open Pit Ore Milled DMT 779,82 1,19,418-24% 3,169,98 3,513,959-1% Tajo Norte Ore Grade Oz/MT % % Recovery Rate % % % Ounces Produced Oz 721, ,695-2% 3,31,796 1,835,242 65% Zinc Production Mining Unit Operating Results Unit 4Q17 4Q16 % FY17 FY16 % Underground Ore Milled DMT 132, , Tambomayo Ore Grade % Recovery Rate % MT Produced MT 2, , Ore Milled DMT 325, ,291 % 1,364,478 1,267,752 8% Uchucchacua Ore Grade % % % Recovery Rate % % % MT Produced MT 4,318 1,662 16% 13,4 7,227 8% Ore Milled DMT 31,296 51,613-39% 17,519 24,35-16% Mallay Ore Grade Oz/MT % % Recovery Rate % % % MT Produced MT 1,281 2,326-45% 7,12 1,463-32% Open Pit Ore Milled DMT 779,82 1,19,418-24% 3,169,98 3,513,959-1% Tajo Norte Ore Grade % % % Recovery Rate % % % MT Produced MT 1,785 19,98-46% 51,511 57,385-1% Copper Production Mining Unit Operating Results Unit 4Q17 4Q16 % FY17 FY16 % Underground Ore Milled DMT 687, ,519-1% 2,517,673 2,597,926-3% Marcapunta Ore Grade % % % Recovery Rate % % % MT Produced MT 12,13 13,858-13% 45,97 49,17-8%

12 Fourth Quarter 217 Results Page 12 of 26 APPENDIX 3: EBITDA Reconciliation (in thousand US$) 4Q17 4Q16 FY 217 FY 216 Net Income ,169 64, ,814 Add / Substract: 117, ,961 37, ,683 Provision for income tax, net -9,62 15,879 18,12 53,54 Share in associated companies by the equity method, net -4,36 42,543-13,27 365,321 Interest income ,517-6,83 Interest expense 8,785 4,995 34,623 31,58 Loss on currency exchange difference ,383-2,928-2,638 Long Term Compensation provision 1, , Depreciation and Amortization 74,123 54,66 213, ,647 Workers participation provision -49 1,561 2,195 8,133 Loss from discontinued operations 12,243 12,691 1,98 19,73 Impairment of Long-Lived Assets 21,62 21,62 Adjustment of component of stripping cost 13,573 13,573 Provision for contingencies , EBITDA Buenaventura Direct Operations 116,629 8, , ,869 EBITDA Yanacocha (43.65%) 19,168 16,8 18,717 58,816 EBITDA Cerro Verde (19.58%) 95,32 69, ,94 25,86 EBITDA Coimolache (4.1%) 14,257 1,749 46,456 47,316 Adjusted EBITDA (including Associated companies) 245, ,24 714, ,87 Note: EBITDA (Buenaventura Direct Operations) consists of earnings before net interest, taxes, depreciation and amortization, share in associated companies, net, loss on currency exchange difference, other, net, provision for workers profit sharing and provision for long-term officers compensation. EBITDA (including associated companies) consists of EBITDA (Buenaventura Direct Operations), plus (1) Buenaventura s equity share of EBITDA (Yanacocha) (2) Buenaventura s equity share of EBITDA (Cerro Verde), plus (3) Buenaventura s equity share of EBITDA (Coimolache). All EBITDA mentioned were similarly calculated using financial information provided to Buenaventura by the associated companies. Buenaventura presents EBITDA (Buenaventura Direct Operations) and EBITDA (including affiliates) to provide further information with respect to its operating performance and the operating performance of its equity investees, the affiliates. EBITDA (Buenaventura Direct Operations) and EBITDA (including affiliates) are not a measure of financial performance under IFRS, and may not be comparable to similarly titled measures of other companies. You should not consider EBITDA (Buenaventura Direct Operations) and EBITDA (including affiliates) as alternatives to operating income or net income determined in accordance with IFRS, as an indicator of Buenaventura s, affiliates operating performance, or as an alternative to cash flows from operating activities, determined in accordance with IFRS, as an indicator of cash flows or as a measure of liquidity.

13 Fourth Quarter 217 Results Page 13 of 26 APPENDIX 4: PRELIMINARY PROVEN AND PROBABLE RESERVES

14 Fourth Quarter 217 Results Page 14 of 26 APPENDIX 5: COST APPLICABLE TO SALES RECONCILIATION Reconciliation of Costs Applicable to Sales and Cost Applicable to Sales per Unit Sold Cost applicable to sales consists of cost of sales, excluding depreciation and amortization, plus selling expenses. Cost applicable to sales per unit sold for each mine consists of cost applicable to sales for a particular metal produced at a given mine divided by the volume of such metal produced at such mine in the specified period. We note that cost applicable to sales is not directly comparable to the cash operating cost figures disclosed in previously furnished earnings releases. Cost applicable to sales and Cost applicable to sales per unit of mineral sold are not measures of financial performance under IFRS, and may not be comparable to similarly titled measures of other companies. We consider Cost applicable to sales and Cost applicable to sales per unit of mineral sold to be key measures in managing and evaluating our operating performance. These measures are widely reported in the precious metals industry as a benchmark for performance, but do not have standardized meanings. You should not consider Cost applicable to sales or Cost applicable to sales per unit of mineral sold as alternatives to cost of sales determined in accordance with IFRS, as indicators of our operating performance. Cost applicable to sales and Cost applicable to sales per unit of mineral sold are calculated without adjusting for by-product revenue amounts. The tables below set forth (i) a reconciliation of consolidated Cost of sales, excluding depreciation and amortization to consolidated Cost applicable to sales, (ii) reconciliations of the components of Cost applicable to sales (by mine and mineral) to the corresponding consolidated line items set forth on our consolidated statements of profit or loss for the three and nine months ended September 3, 215 and 216, and (iii) reconciliations of Cost of sales, excluding depreciation and amortization to Cost applicable to sales for each of our mining units. The amounts set forth in Cost applicable to sales and Cost applicable to sales per unit sold for each mine and mineral indicated in the tables below can be reconciled to the amounts set forth on our consolidated statements of profit or loss for the three and nine months ended September 3, 215 and 216 by reference to the reconciliations of Cost of sales, excluding depreciation and amortization (by mine and mineral), Selling Expenses (by mine and metal) expenses and Exploration in units in operations (by mine and mineral) to consolidated Cost of sales, excluding depreciation and amortization, consolidated Selling Expenses and consolidated Exploration in units in operations expenses, respectively, set forth below.

15 Fourth Quarter 217 Results Page 15 of 26 Set forth below is a reconciliation of consolidated Cost of sales, excluding depreciation and amortization, to consolidated Cost applicable to sales: Consolidated Cost of sales excluding depreciation and amortization Consolidated Exploration in units in operation Consolidated Commercial deductions Consolidated Selling expenses Consolidated Cost applicable to sales For the 3 months ended December 31 For the 12 months ended December (in thousands of US$) 181, ,21 64,387 58,566 26,135 29,943 94,928 96,149 65,414 73,17 253, ,413 8,14 6,87 24,88 21, , ,158 1,13,326 87,861 Set forth below is a reconciliation of Cost of sales, excluding depreciation and amortization (by mine and mineral) to consolidated Cost of sales: Cost of sales by mine and mineral Julcani, Gold Julcani, Silver Julcani, Lead Julcani, Copper Mallay, Gold Mallay, Silver Mallay, Lead Mallay, Zinc Orcopampa, Gold Orcopampa, Silver Orcopampa, Copper Uchucchacua, Gold Uchucchacua, Silver Uchucchacua, Lead Uchucchacua, Zinc Tambomayo, Gold Tambomayo, Silver Tambomayo, Lead Tambomayo, Zinc La Zanja, Gold La Zanja, Silver El Brocal, Gold El Brocal, Silver El Brocal, Lead El Brocal, Zinc El Brocal, Copper Non Mining Units Consolidated Cost of sales, excluding depreciation and amortization For the 3 months ended December 31 For the 12 months ended December (in thousands of US$) 15 6,674 5,485 26,413 2, ,48 1, ,91 2,292 8,24 9, ,327 4,47 4,943 2,167 2,95 8,696 7,371 29,988 21,376 15,848 88, ,18 4,97 4, ,484 25,19 13,14 92,188 4,143 1,927 12,942 5,763 4,667 1,324 12,769 4,262 15,627 34,97 5,729 11, ,46 2,486 3,419 26,88 25,17 99,34 89, ,922 1,787 1,985 1,539 7,129 6,773 4,773 4,161 19,185 12,161 3,935 3,24 15,563 9,878 11,792 14,93 45,929 45,56 28,724 22,826 94,21 92,224 3,837 2,886 13,927 11, , ,21 64,387 58,566 Set forth below is a reconciliation of Exploration expenses in units in operation (by mine and mineral) to consolidated Exploration expenses in mining units: Exploration expenses in units in operation by mine and mineral Julcani, Gold Julcani, Silver Julcani, Lead Julcani, Copper Mallay, Gold Mallay, Silver Mallay, Lead Mallay, Zinc Orcopampa, Gold Orcopampa, Silver Orcopampa, Copper Uchucchacua, Gold Uchucchacua, Silver Uchucchacua, Lead Uchucchacua, Zinc Tambomayo, Gold Tambomayo, Silver Tambomayo, Lead Tambomayo, Zinc La Zanja, Gold La Zanja, Silver El Brocal, Gold El Brocal, Silver El Brocal, Lead El Brocal, Zinc El Brocal, Copper Non Mining Units Consolidated Exploration expenses in units in operation For the 3 months ended December 31 For the 12 months ended December (in thousands of US$) 8 2,63 2,764 11,614 1, , ,134 3, ,163 1, ,262 2,633 1,718 13,71 37,285 42, ,443 2, ,29 8,589 21,639 28, ,719 1, ,682 1,38 3,556 6,386 1,34 2, ,135 29,943 94,928 96,149

16 Fourth Quarter 217 Results Page 16 of 26 Set forth below is a reconciliation of Commercial Deductions in units in operation (by mine and mineral) to consolidated Commercial deductions: Commercial Deductions in units in operation by mine and mineral Julcani, Gold Julcani, Silver Julcani, Lead Julcani, Copper Mallay, Gold Mallay, Silver Mallay, Lead Mallay, Zinc Orcopampa, Gold Orcopampa, Silver Orcopampa, Copper Uchucchacua, Gold Uchucchacua, Silver Uchucchacua, Lead Uchucchacua, Zinc Tambomayo, Gold Tambomayo, Silver Tambomayo, Lead Tambomayo, Zinc La Zanja, Gold La Zanja, Silver El Brocal, Gold El Brocal, Silver El Brocal, Lead El Brocal, Zinc El Brocal, Copper Non Mining Units Consolidated Commercial deductions in units in operation For the 3 months ended December 31 For the 12 months ended December (in thousands of US$) ,129 3,676 5, ,167 2,441 4, ,336 2, ,587 2,94 5, ,38 9,552 35,851 37,877 1, ,35 2,348 5,173 1,85 14,286 6, , ,326 2,487 9,28 9,28 3,49 3,876 14,362 9,971 1,86 2,72 8,592 5,49 6,636 16,196 33,95 39,944 32,824 31,33 118,59 114,12 65,414 73,17 253, ,413 Set forth below is a reconciliation of Selling expenses (by mine and mineral) to consolidated Selling expenses: Selling expenses by mine and mineral (in thousands of US$) Julcani, Gold Julcani, Silver Julcani, Lead Julcani, Copper Mallay, Gold Mallay, Silver Mallay, Lead Mallay, Zinc Orcopampa, Gold Orcopampa, Silver Orcopampa, Copper , Uchucchacua, Gold Uchucchacua, Silver Uchucchacua, Lead Uchucchacua, Zinc Tambomayo, Gold Tambomayo, Silver Tambomayo, Lead Tambomayo, Zinc La Zanja, Gold La Zanja, Silver El Brocal, Gold El Brocal, Silver El Brocal, Lead El Brocal, Zinc El Brocal, Copper Non Mining Units 1, , , , , , , ,757 5,644 2,39 4, , ,815 5,74 2,278 Consolidated Selling expenses For the 3 months ended December 31 For the 12 months ended December 31 8,14 6,87 24,88 21,733

17 Fourth Quarter 217 Results Page 17 of 26 JULCANI JULCANI 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) - 6, ,687 5, ,22 Cost of Sales (without D&A) (US$) 26,413 3, , ,32 1, ,985 Exploration Expenses (US$) - 2, ,998 2, ,34 Exploration Expenses (US$) 11,614 1, ,9 8 1, ,69 Commercial Deductions (US$) , ,237 Commercial Deductions (US$) - 3, , , ,514 Selling Expenses (US$) Selling Expenses (US$) Cost Applicable to Sales (US$) 9,992 1, ,59 9, ,53 Cost Applicable to Sales (US$) - 42,243 4, , ,98 3, ,413 Volume Sold - 33, Not Applicable 1 767, Not Applicable Volume Sold 21 2,466,846 1, Not Applicable 32 3,9,967 2, No Aplicable CAS ,782-6,417 Not Applicable ,517-2,63 Not Applicable CAS ,543-6,318 No Applicable ,241-2,837 No Applicable 142% MALLAY MALLAY 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) - 1, ,167-5, 53 2,292 1,327 2,95-5,767 Cost of Sales (without D&A) (US$) 225 8,24 4,47 8,696-21, ,461 4,943 7,371-22,287 Exploration Expenses (US$) ,247 Exploration Expenses (US$) 58 2,134 1,163 2,262-5, ,379 1,765 2,633-7,96 Commercial Deductions (US$) , , ,587-3,447 Commercial Deductions (US$) 7 2,441 1,336 2,94-6, ,745 2,471 5,796-13,24 Selling Expenses (US$) Selling Expenses (US$) , ,549 Cost Applicable to Sales (US$) 1 2,735 1,341 3,155-7, ,487 2,59 4,622-11,82 Cost Applicable to Sales (US$) ,176 7,185 14,318-35, ,242 9,523 16,312-45, Volume Sold - 211, ,153 - Not Applicable ,93 1,36 1,925 - Not Applicable Volume Sold ,4 3,84 5,926 - Not Applicable 1,41 1,426,986 6,775 8,728 - Not Applicable CAS ,936 2,737 - Not Applicable ,95 2,4 - Not Applicable CAS 1, ,889 2,416 - No Applicable ,46 1,869 - No Applicable -4% ORCOPAMPA ORCOPAMPA 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 29, ,998 21,376 1, ,537 Cost of Sales (without D&A) (US$) 15,848 4, ,2 88,213 4, ,576 - Exploration Expenses (US$) 1, ,79 13, ,445 Exploration Expenses (US$) 37,285 1, ,818 42,985 2, ,111 Commercial Deductions (US$) Commercial Deductions (US$) , Selling Expenses (US$) Selling Expenses (US$) ,16 1, ,75 Cost Applicable to Sales (US$) 41,189 1, ,629 35,694 1, ,74 Cost Applicable to Sales (US$) 145,27 5, , ,718 6, ,429 Volume Sold 55,812 13, Not Applicable 46, , Not Applicable Volume Sold 195, , Not Applicable 188,511 68, Not Applicable CAS ,77 Not Applicable Not Applicable CAS ,37 No Applicable ,35 No Applicable UCHUCCHACUA UCHUCCHACUA 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 42 22,484 4,143 4,667-31, ,19 1,927 1,324-28,497 Cost of Sales (without D&A) (US$) ,14 12,942 12, , ,188 5,763 4,262-12,336 Exploration Expenses (US$) 8 4, , , ,717 Exploration Expenses (US$) 29 21,639 2,719 2,682-27, ,292 1,769 1,38-31,46 Commercial Deductions (US$) 12 8,38 1,489 5,173-15, , ,85-12,13 Commercial Deductions (US$) 41 35,851 4,35 14,286-54, ,877 2,348 6,6-46,277 Selling Expenses (US$) 3 1, ,5 3 1, ,285 Selling Expenses (US$) 6 4, ,35 6 4, ,632 Cost Applicable to Sales (US$) 65 36,867 6,737 11,86-54, ,467 3,398 3,641-51,62 Cost Applicable to Sales (US$) ,329 2,617 3, , ,529 1,14 11,77-184,651 Volume Sold 68 3,747,35 4,365 3,692 - Not Applicable 127 3,856,346 2,218 1,254 - Not Applicable Volume Sold 21 15,583,553 13,127 1,281 - Not Applicable ,739,128 8,35 5,295 - Not Applicable CAS ,544 3,3 - No Applicable ,532 2,93 - No Applicable CAS 1, ,571 2,951 - No Applicable ,214 2,223 - No Applicable Contacts in Lima: Contacts in NY: Leandro Garcia, Chief Financial Officer Barbara Cano (511) (646) barbara@inspirgroup.com Rodrigo Echecopar, Investor Relations Coordinator (511) / rodrigo.echecopar@buenaventura.pe Company Website:

18 Fourth Quarter 217 Results Page 18 of 26 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 15,627 5, ,486-24,754 Cost of Sales (without D&A) (US$) 34,97 11,791 2,46 3,419-52,163 Exploration Expenses (US$) 3,556 1, ,633 Exploration Expenses (US$) 6,386 2, ,543 Commercial Deductions (US$) Commercial Deductions (US$) 11 1, ,354 Selling Expenses (US$) ,16 Selling Expenses (US$) ,386 Cost Applicable to Sales (US$) 19,859 7,498 1,291 3,551-32,199 Cost Applicable to Sales (US$) 42,33 15,29 2,893 4,932-65,446 Volume Sold 31, , ,96 - Not Applicable Volume Sold 63,13 1,621,611 1,769 2,398 - Not Applicable CAS ,459 1,863 - No Applicable No Applicable CAS ,635 2,57 - No Applicable Not Applicable GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 26, ,963 25, ,669 Cost of Sales (without D&A) (US$) 99,34 2, ,225 89,816 1, ,63 Exploration Expenses (US$) Exploration Expenses (US$) Commercial Deductions (US$) Commercial Deductions (US$) Selling Expenses (US$) Selling Expenses (US$) 1, ,48 1, ,53 Cost Applicable to Sales (US$) 26, ,42 26, ,759 Cost Applicable to Sales (US$) 11,427 2, ,49 91,732 1, ,566 Volume Sold 3,285 77, Not Applicable 35,43 62, Not Applicable Volume Sold 128, , Not Applicable 151, , Not Applicable CAS Not Applicable Not Applicable CAS No Applicable Not Applicable 19% BROCAL BROCAL 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 1,985 4,773 3,935 11,792 28,724 51,28 1,539 4,161 3,24 14,93 22,826 45,643 Cost of Sales (without D&A) (US$) 7,129 19,185 15,563 45,929 94,21 181,828 6,773 12,161 9,878 45,56 92, ,542 Exploration Expenses (US$) Exploration Expenses (US$) Commercial Deductions (US$) 2,326 3,49 1,86 6,636 32,824 47,55 2,487 3,876 2,72 16,196 31,33 55,962 Commercial Deductions (US$) 9,28 14,362 8,592 33,95 118,59 184,728 9,28 9,971 5,49 39, ,12 178,444 Selling Expenses (US$) ,69 3, ,31 2,62 Selling Expenses (US$) 428 1, ,757 5,644 1, ,815 5,74 1,31 Cost Applicable to Sales (US$) 4,427 8,463 6,26 19,121 63,239 11,276 4,115 8,276 5,27 31,98 55,466 14,225 Cost Applicable to Sales (US$) 16,836 34,699 25,9 82, , ,47 16,22 22,884 15,979 88, ,94 355,287 Volume Sold 4, ,928 4,578 9,285 11,566 Not Applicable 3, ,176 4,138 16,784 12,738 Not Applicable Volume Sold 15,881 3,253,899 19,415 43,12 42,633 Not Applicable 13,62 1,696,176 11,874 48,86 45,572 Not Applicable CAS 1, ,316 2,59 5,468 Not Applicable 1, ,273 1,853 4,354 Not Applicable CAS 1, ,292 1,915 5,119 No Applicable 1, ,346 1,88 4,651 Not Applicable 11% 26% NON MINING COMPANIES NON MINING COMPANIES 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) , ,886 Cost of Sales (without D&A) (US$) , , Selling Expenses (US$) Selling Expenses (US$) , ,278 Total (US$) , ,535 Total (US$) , ,515 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 73,729 43,343 1,916 21,112 28, ,783 48,42 38,887 6,788 17,512 22,96 137,21 Cost of Sales (without D&A) (US$) 247, ,626 38,68 7,813 94,42 64, , ,9 22,439 57,14 92,399 58,566 Exploration Expenses (US$) 14,298 8,646 1,472 1, ,135 14,228 12,969 1,431 1, ,943 Exploration Expenses (US$) 44,66 39,12 5,596 5, ,928 43,84 43,849 4,468 3, ,149 Commercial Deductions (US$) 2,67 13,195 3,839 12,867 32,843 65,414 2,88 15,793 3,571 19,588 31,347 73,17 Commercial Deductions (US$) 1,676 57,545 15,119 51, , ,923 1,58 57,778 1,774 51, ,58 244,413 Selling Expenses (US$) 1,357 2, ,261 1,691 8,14 1,12 1, ,312 6,87 Selling Expenses (US$) 3,367 7,294 1,873 3,867 5,648 24,88 2,517 6,422 1,287 3,52 5,79 21,733 Cost Applicable to Sales (US$) 92,55 67,724 16,887 36,914 63, ,346 66,9 69,411 12,149 39,361 55, ,158 Cost Applicable to Sales (US$) 36, ,478 6, , ,85 1,13, , ,949 38, , ,252 87,861 Volume Sold 122,85 6,228,219 1,833 16,36 11,64 Not Applicable 85,836 5,938,481 8,34 19,963 12,779 Not Applicable Volume Sold 43,48 24,773,278 4,32 61,724 42,756 Not Applicable 354,116 21,863,19 29,678 62,829 45,674 Not Applicable CAS ,559 2,32 5,466 Not Applicable ,463 1,972 4,352 Not Applicable CAS ,515 2,141 5,119 Not Applicable ,313 1,852 4,647 Not Applicable % -7% 17% 11% -1% 16% COIMOLACHE COIMOLACHE 4Q 217 4Q 216 FY 217 FY 216 GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL GOLD (OZ) SILVER (OZ) LEAD (MT) ZINC (MT) COPPER (MT) TOTAL Cost of Sales (without D&A) (US$) 2,52 1, ,117 15, ,455 Cost of Sales (without D&A) (US$) 65,1 4, ,689 58,89 3, ,695 Exploration Expenses (US$) 5, ,761 6, ,262 Exploration Expenses (US$) 12, ,95 12, ,65 Commercial Deductions (US$) Commercial Deductions (US$) Selling Expenses (US$) Selling Expenses (US$) , ,128 Cost Applicable to Sales (US$) 26,326 2, ,395 22, ,77 Cost Applicable to Sales (US$) 78,471 5, ,125 73,145 4, ,989 TAMBOMAYO 4Q 217 4Q 216 LA ZANJA 4Q 217 4Q 216 BUENAVENTURA CONSOLIDATED 4Q 217 4Q 216 Volume Sold 47,58 288, Not Applicable 41, , Not Applicable Volume Sold 151,797 89, Not Applicable 148, , Not Applicable CAS Not Applicable Not Applicable CAS No Applicable Not Applicable TAMBOMAYO FY 217 FY 216 LA ZANJA FY 217 FY 216 BUENAVENTURA CONSOLIDATED FY 217 FY 216

19 APPENDIX 6: ALL-IN SUSTAINING COST Compañía de Minas Buenaventura S.A.A. Fourth Quarter 217 Results Page 19 of 26 Buenaventura All-in Sustaining Cost for 4Q17 Buenaventura 1 La Zanja Tantahuatay Attributable 2 4Q17 4Q17 4Q17 4Q17 Au Ounces Sold BVN 87,421 Au Ounces bought from La Zanja Au Ounces Sold Net 87,421 3,68 47,58 122,739 4Q17 4Q17 4Q17 4Q17 Income Statement & Cash Flow US$ ' US$/Oz Au US$ ' US$/Oz Au US$ ' US$/Oz Au US$ ' US$/Oz Au Cost of Sales 3 16,437 1,218 27, , ,734 1,57 Exploration in Operating Units 26, , , Royalties 5, , Comercial Deductions 4 18, , Selling Expenses 4, ,58 37 Administrative Expenses 13, , , , Other, net 1, , ,457 2 Sustaining Capex 5 22, , , , By-product Credit -127,593-1,46-1, , , All-in Sustaining Cost 69, ,939 1,27 45, , *All-in Sustaining Cost does not include: Depreciation and Amortization, Stoppage of mining units, Exploration in non-operating areas. Notes: 1. Non-consolidated financial statements for Compañia De Minas Buenaventura S.A.A. 2. Considers 1% from Compañia De Minas Buenaventura S.A.A., 53.6% from La Zanja and 4.95% from Tantahuatay. 3. For Buenaventura does not consider purchase of concentrate from La Zanja. 4. For all metals produced. 5. Sustaining Capex + Growth Capex equals Acquisitions of mining concessions, development costs, property, plant and equipment.