FORM 6-K

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of the
Securities Exchange Act of 1934

For the month of July 2006

BUENAVENTURA MINING COMPANY INC.

(Translation of Registrant’s Name into English)

CARLOS VILLARAN 790

SANTA CATALINA, LIMA 13, PERU

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x Form 40-F o

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes o No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-_______________.

This report consists of consolidated Financial Statements issued by Compañía de Minas Buenaventura S.A.A. and subsidiaries on July 26, 2006, announcing the Company’s Second Quarter 2006 results.

FOR IMMEDIATE RELEASE

Compañía de Minas Buenaventura Announces
Second Quarter 2006 Results

Lima, Peru, July 26, 2006 – Compañía 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, announced today its results for the second quarter of 2005. All figures have been prepared in Peruvian GAAP and are stated in current Peruvian Nuevos Soles (S/.) as of June 30, 2006. For the convenience of the reader, figures are stated in U.S. dollars (US$) at a rate of S/.3.260 per US$1.00 for 2Q06 and S/.3.254 per US$1.00 for 2Q05.

Comments from the Chief Executive Officer:

Mr. Roque Benavides, Chief Executive Officer of Buenaventura stated:  “We are pleased to report outstanding results for the second quarter.

This quarter, Buenaventura’s net income was US$138.1 million, or US$1.09 per ADS, which represents an increase of 79% when compared with 2Q05. Operating income was US$86.6 million, 212% higher than the figure recorded in 2Q05. Total EBITDA was US$260.1 million, which represented a 123% increase when compared to 2Q05. EBITDA from Buenaventura’s direct operations was US$84.9 million, 203% higher than in 2Q05.

These achievements were driven by important results from our direct operations as well as the increasing contribution from Cerro Verde and Yanacocha.”

Financial Highlights (in millions of US$, except EPS figures):

	2Q06		2Q05		Var%			6M06		6M05		Var%
Total Revenues		168.6		88.1		91	%		304.6		171.3		78	%
Operating Income		86.6		27.8		212	%		144.0		54.3		165	%
EBITDA (BVN Direct Operations)		84.9		28.0		203	%		137.1		54.3		152	%
EBITDA (including Yanacocha and Cerro Verde)		260.1		116.9		123	%		452.6		241.8		87	%
Net Income		138.1		77.2		79	%		266.9		143.6		86	%
EPS		1.09		0.61		79	%		2.10		1.1		86	%

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 2 of 14

Operating Revenue

In 2Q06, net sales were US$140.5 million, a 97% increase when compared to the US$71.3 million reported in 2Q05 mainly due to:

1.	An 120% increase in silver and a 40% increase in zinc sold from Colquijirca.
2.	A 27% increase in gold sold from 92,078 ounces in 2Q05 to 117,345 ounces in 2Q06.
3.	The High realized prices of silver (72%) and zinc (147%).

Royalty income during 2Q06 totaled US$15.0 million, a 58% increase when compared to the US$9.6 million reported in 2Q05. This was due to higher sales at Yanacocha.

Operating Highlights	2Q06		2Q05		Var %			6M06		6M05		Var %
Net Sales (in millions of US$)		140.5		71.3		97	%		249.9		138.8		80	%
Average Realized Price Gold (US$/oz) Direct Operations		381		362		5	%		365		369		-1	%
Average Realized Price Gold (US$/oz) inc. Yanacocha		561		413		36	%		535		415		29	%
Average Realized Price Silver (US$/oz)		12.14		7.05		72	%		11.65		7.04		65	%
Average Realized Price Lead (US$/TM)		1,113		993		12	%		1,159		989		17	%
Average Realized Price Zinc (US$/TM)		3,196		1,293		147	%		2,730		1,264		116	%

	Sales Content
		2Q06	2Q05	Var %		6M06	6M05	Var %
Gold (in oz) Direct Operations		117,345	92,078	27	%	217,611	177,306	23	%
Gold (in oz) including Yanacocha		460,095	407,351	13	%	896,402	829,946	8	%
Silver (in oz)		4,391,009	3,520,705	25	%	8,446,007	6,770,734	25	%
Lead (in MT)		7,277	6,933	5	%	15,198	13,764	10	%
Zinc (in MT)		14,409	11,266	28	%	27,342	23,802	15	%

Accumulated net sales for the first six-month period of 2006 was US$249.9 million, an 80% increase compared to the same period of 2005 (US$138.8 million). Accumulated Royalty income was US$28.5 million, a 45% increase when compared to US$19.6 million in 2005.

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 3 of 14

Production and Operating Costs

Buenaventura’s equity production¹ during 2Q06 was 97,250 ounces of gold, 10% higher than the 88,399 ounces reported in 2Q05; and 3,847,249 ounces of silver, a 16% increase when compared to the 3,305,095 ounces reported in 2Q05.

Equity production¹ for the accumulated six-month period was 190,394 ounces of gold and 7,162,469 ounces of silver. This represented an increase of 8% in gold production (176,766 ounces in 2005) and a 9% increase in silver production compared to 2005 (6,593,195 ounces).

	Equity Production1
	2Q06		2Q05		Var %			6M06		6M05		Var %
Gold (oz)		97,250		88,399		10	%		190,394		176,766		8	%
Gold inc. Yanacocha (oz)		327,630		309,559		6	%		677,024		656,977		3	%
Silver (oz)		3,847,249		3,305,095		16	%		7,162,469		6,593,195		9	%
Lead (MT)		5,133		3,718		38	%		9,386		7,961		18	%
Zinc (MT)		7,753		5,822		33	%		14,346		11,825		21	%

At Orcopampa (100%), total gold production in 2Q06 was 63,976 ounces, a 12% increase when compared to the 57,129 ounces reported in 2Q05 due to higher ore grade. Accumulated gold production was 125,728 ounces, a 10% increase when compared to 2005 (114,101 ounces).

Cash operating cost during 2Q06 was US$140/oz, in-line with the figure reported on 2Q05.

Total royalties paid to the government at Orcopampa in 2Q06 were US$0.48 million.

At Uchucchacua (100%), total silver production during 2Q06 was 2,432,464 ounces, a 4% decrease when compared to 2,534,704 ounces in 2Q05. This decrease was due to lower ore milled. Accumulated silver production was 4,605,230 ounces, a 9% decrease when compared to 2005 (5,071,465 ounces).

Cash operating cost in 2Q06 increased 75% from $2.47/oz in 2Q05 to US$4.31/oz. This was best explained by:

1.	An increase of US$0.17/oz in supplies, due to higher diesel prices, explosive consumption and support materials.
2.	An increase of US$0.64/oz in the contractor workforce used to prepare and develop the Huantajalla mining area, as well as higher development expenses in the Casualidad Alta area in preparation for the oxides exploitation.
3.	A net effect of US$0.65/oz explained by higher commercial treatment charge escalators, as well deductions and penalties due to the effect of higher zinc and silver prices, partially offset by higher zinc by-product credits.
4.	Higher royalties paid to the government due to higher prices.

Total royalties paid to the government at Uchucchacua in 2Q06 were US$0.61 million.

At Antapite (78.04%), total production in 2Q06 was 27,826 ounces of gold, an 8% increase when compared to the 25,772 ounces produced in 2Q05. Accumulated gold production was 52,784 ounces, a 1% increase when compared to 52,080 ounces in 2005.

¹ Production includes 100% of operating units, 78.04% of Ishihuinca and Antapite, 34.29% of El Brocal, 100% of CEDIMIN.

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 4 of 14

Gold cash operating cost in 2Q06 was US$214/oz, a 2% increase when compared to US$210/oz in 2Q05. This slight increase was due to exploration and mine development costs.

Total royalties paid to the government at Antapite in 2Q06 were US$0.17 million.

At Colquijirca (34.29%), total zinc production was 16,158 MT in 2Q06, a 25% increase when compared to 12,929 MT in 2Q05 due to the higher volume of ore produced and a higher recovery rate. Total silver production during 2Q06 was 2,627,558 ounces, an 184% increase when compared to the 924,025 ounces in 2Q05 due to the higher volume of ore produced, mentioned above, as well as an increase in ore grade from 3.56 oz/ST in 2Q05 to 8.74 oz/ST in 2Q06.

For the six-month 2006 period, total zinc production was 31,666 MT, a 20% increase when compared to the same period of 2005 (26,464 MT). In the case of silver, total production increased 163%, from 1,755,752 ounces in 2005 to 4,625,466 ounces in 2006.

Zinc cash operating costs decreased 34% from US$928 per MT in 2Q05 to US$611 per MT in 2Q06. This was due to a significant silver and lead by-product credit contribution despite higher commercial treatment expenses as a result of higher prices.

Total royalties paid to the government at Colquijirca in 2Q06 were US$0.72 million.

Operating Expenses

General and administrative expenses for 2Q06 were US$8.9 million, a 62% increase compared to US$5.5 million in 2Q05. This increase was mainly due to a higher provision for statutory Board Compensation. Accumulated general and administrative expenses for the six-month period were US$17.2 million, a 41% increase when compared to the US$12.2 million reported in the same period of 2005.

Exploration Costs in non-operational mining sites

Exploration costs in non-operating areas during 2Q06 were US$7.3 million, a 12% increase compared to US$6.5 million during 2Q05. The main efforts were focused at the Marcapunta, La Zanja and Los Pircos projects. Accumulated exploration costs in non-operating areas during 2006 were US$15.9 million a 27% increase when compared with the 2005 figure (US$12.5 million).

Operating Income

Operating income in 2Q06 was US$86.6 million a 212% increase compared to US$27.8 million in 2Q05. This result was mainly due to the 92% increase in operating revenues, which largely offset the 31% increase in costs of operations.

For the six-month period 2006, operating income was US$144.0 million a 166% increase when compared to the US$54.3 million reported in the same period of 2005.

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 5 of 14

Share in Affiliate Companies

Buenaventura’s income from non-consolidated affiliates was US$112.7 million during 2Q06, an increase of 152% when compared to the US$44.9 million reported in 2Q05. This increase is explained by the higher contribution from Yanacocha (US$86.3 million) and Cerro Verde (US$25.7 million). For the six-month period of 2006, income from non-consolidated affiliates was US$207.8 million, an increase of 116% compared to the US$96.5 million reported in 2005.

At Yanacocha (43.65%), 2Q06 gold production was 750,585 ounces of gold, an increase of 6% when compared to 2Q05’s production (709,185 ounces). Gold production for the six-month period 2006 was 1,551,028 ounces, an increase of 3% when compared to 1,505,102 ounces in 2005. It is important to mention that the Company continues budgeting a full year production of 2.6 million ounces.

Gold cash cost at Yanacocha during 2Q06 was US$192/oz, which represented a 21% increase compared to a gold cash cost of US$159/oz in 2Q05. This is explained by:

1.	An increase in commercial royalties paid due to higher prices.
2.	Higher diesel prices.
3.	Higher worker’s participation.

Net income at Yanacocha during 2Q06, was US$197.4 million, an 111% increase when compared to 2Q05 figures (US$93.7 million). For the six-month period 2006, net income was US$370.5 million, an increase of 80% compared to the US$206.3 million reported in 2005.

In 2Q06, EBITDA was US$327.3 million, an increase of 79% compared to 2Q05 (US$183.2 million). This increase was due to the higher sales content and realized gold price increasing from US$428/oz in 2Q05 to US$623/oz in 2Q06. Accumulated EBITDA in 2006 was US$616.1 million, an increase of 58% when compared to the US$390.1 million reported in the same period of 2005.

CAPEX for 2Q06 was US$62.6 million, a 3% increase when compared to US$60.8 in 2Q05.

At Cerro Verde (18.50%), 2Q06 copper production was 23,598 MT a 6% increase when compared to 2Q05 (22,226 MT).  For the six-month period 2006 copper production totaled 46,339 MT.

Net sales at Cerro Verde increased 157% from US$80.0 million in 2Q05 to US$205.6 million in 2Q06. Accumulated net sales for 2006 were US$299.2 million, which represented an increase of 103% compared to 2Q05 (US$147.2 million).

In 2Q06, net income reached US$140.4 million, a 269% increase compared to 2Q05 (US$38.0 million). For the six-month period of 2006 net income was US$217.6 million, a 208% increase compared to 2005 (US$70.7 million).

CAPEX for 2Q06 totaled US$169.9 million, of which US$160.3 million was expended for the construction of the Primary Sulfide Project.

Net Income

This quarter, Buenaventura’s net income was US$138.1 million, representing US$1.09 per ADS, a 79% increase when compared to US$77.2 million (US$0.61 per ADS) in 2Q05. This was mainly due to the good result of our direct operations, as well as the contributions of Yanacocha and Cerro Verde.

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 6 of 14

Accumulated net income for 2006 was US$266.9 million (US$2.10 per ADS), an increase of 86% when compared to US$143.6 million (US$1.1 per ADS) in 2005.

Hedging Operations

The total hedge book mark-to-market value as of June 30, 2006 was a negative US$630.5 million. During 1Q06, the Company executed 150,000 ounces of silver in derivative instruments.

Project Development

UCHUCCHACUA

• After completing the main sulfides cyanidation plant in April, the Company commenced pilot production to test the equipment achieving positive results. The second stage of this project, a complementary facility to treat oxide ore, is 75% complete. It is expected to be completed during 3Q06 with an estimated investment of US$3.6 million.

• The deepening of the Carmen and Socorro mines and the construction of the Master Shaft from 4060m to 3900m is 21% complete. Expected total investment for this project is US$10.3 million.

ORCOPAMPA

• The auxiliary shaft to improve ventilation and ore transport the Prometida area commenced during the second quarter. Expected total investment is US$3.7 million.

• The expansion of the treatment plant to increase capacity from 1,200 MT to 1,800 MT commenced in May 2006 and will be completed by October 2006. The expected total investment is US$4.7 million.

MARCAPUNTA

• In 2Q06, the main decline advanced 238m., to a present depth of 1,460.8 m. We expect an advance of an additional 270m in the main ramp during the next quarter. In addition, at Marcapunta North, a demonstration plant to treat 1000 MT/day is expected to begin full operations in 3Q06.

* * *

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 7 of 14

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 four mines in Peru and also has controlling interests in four mining companies as well as a minority interest in several other mining companies in Peru.  The Company owns 43.65% in Minera Yanacocha S.R.L. (a partnership with Newmont Mining Corporation) which is one of the most important precious metal producers in the world and 18.50% in Sociedad Minera Cerro Verde S.A.A, an important copper Peruvian Company.

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 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, economical, social and legal developments.  These forward-looking statements reflect the Company’s view with respect to the Company and Yanacocha’s future financial performance.  Actual results could differ materially from those projected in the forward-looking statements as a result of a variety of factors discussed elsewhere in this Press Release.

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 8 of 14

**Tables to follow**

APPENDIX 1.

Equity Participation in Affiliates and Subsidiaries
	BVN Equity %	Operating Mines
Minera Yanacocha	43.65	Yanacocha
Sociedad Minera El Brocal*	34.29	Colquijirca
Inversiones Mineras Del Sur*	78.04	Antapite / Ishihuinca
Sociedad Minera Cerro Verde	18.30	Cerro Verde
Cedimin*	100.00	Shila / Paula
Minera Minasnioc*	60.00	Minasnioc Project
Minera La Zanja *	53.06	La Zanja Project
Buenaventura Ingenieros*	100.00	-
Consorcio Energetico de Huancavelica*	100.00	-

*Consolidates

APPENDIX 2

	GOLD PRODUCTION
	Three Months Ended June 30																		Six Months Ended June 30
	Orcopampa									Antapite									Orcopampa									Antapite
	2006			2005			%			2006			2005			%			2006			2005			%			2006			2005			%
Ore Milled DST		117,424			117,569			-0.1	%		45,117			45,128			0.0	%		232,180			227,623			2.0	%		89,319			89,463			-0.2	%
Ore Grade OZ/ST		0.57			0.51			12.0	%		0.64			0.60			7.2	%		0.57			0.53			7.7	%		0.61			0.61			0.7	%
Recovery Rate %		95.6	%		95.6	%		0.0	%		96.4	%		95.7	%		0.7	%		95.7	%		95.5	%		0.2	%		96.4	%		95.7	%		0.8	%
Ounces Produced		63,976			57,129			12.0	%		27,826			25,772			8.0	%		125,728			114,101			10.2	%		52,784			52,080			1.4	%

	SILVER PRODUCTION
	Three Months Ended June 30																		Six Months Ended June 30
	Uchucchacua									Colquijirca									Uchucchacua									Colquijirca
	2006			2005			%			2006			2005			%			2006			2005			%			2006			2005			%
Ore Milled DST		194,298			202,168			-3.9	%		394,322			368,666			7.0	%		385,147			405,018			-4.9	%		760,706			734,523			3.6	%
Ore Grade OZ/ST		17.03			16.92			0.6	%		8.74			3.56			145.7	%		16.37			16.90			-3.2	%		7.95			3.34			138.0	%
Recovery Rate %		73.5	%		74.1	%		-0.6	%		76.2	%		72.1	%		4.1	%		73.0	%		74.1	%		-1.1	%		76.6	%		72.4	%		4.2	%
Ounces Produced		2,432,464			2,534,704			-4.0	%		2,627,558			924,025			184.4	%		4,605,230			5,071,465			-9.2	%		4,625,466			1,755,752			163.4	%

	ZINC PRODUCTION
	Three Months Ended June 30																		Six Months Ended June 30
	Uchucchacua									Colquijirca									Uchucchacua									Colquijirca
	2006			2005			%			2006			2005			%			2006			2005			%			2006			2005			%
Ore Milled DST		194,298			202,168			-3.9	%		394,322			368,666			7.0	%		385,147			405,018			-4.9	%		760,706			734,523			3.6	%
Ore Grade %		1.3	%		1.3	%		-0.2	%		6.0	%		5.8	%		2.8	%		1.2	%		1.4	%		-11.2	%		6.1	%		5.9	%		4.4	%
Recovery Rate %		58.9	%		64.0	%		-5.2	%		75.4	%		69.7	%		5.7	%		55.9	%		60.8	%		-4.9	%		74.9	%		71.4	%		3.6	%
ST Produced		1,552			1,745			-11.1	%		17,811			14,252			25.0	%		2,708			3,473			-22.0	%		34,905			29,171			19.7	%

Compañia de Minas Buenaventura S.A.A.
Second Quarter and Six-Month 2006 Results
Page 9 of 14

APPENDIX 3

Total Gold Commitments
Physical Gold Delivery
As of April 1st 2006

		2006		2007		2008		2009		2010		2011		2012		Total
285	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		318.38		315.16		311.11		305.10		288.42		285.00		285.00		302.26
290	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		329.20		326.71		322.71		317.44		302.24		299.75		290.00		314.64
300	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		331.52		329.43		326.57		322.53		310.13		308.05		300.00		320.02
345	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		338.94		338.13		342.96		345.44		345.66		345.42		345.00		343.15
350	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		338.94		338.13		343.74		347.21		348.82		348.09		345.00		344.62
385	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		338.94		338.13		349.15		359.54		370.92		366.78		345.00		354.89
420	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		338.94		338.13		354.56		370.12		393.03		394.11		404.00		367.94
436	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		338.94		338.13		354.56		370.12		403.13		402.65		404.00		371.17
451	Oz		194,000		368,000		388,000		383,000		380,000		354,000		60,000		2,127,000
	$/oz		338.94		338.13		354.56		370.12		403.13		410.66		404.00		372.50

Silver Derivatives
As of 01/04/06

	At US $ 4.00			At US $ 4.15			At US $ 6.20			At US $ 6.33			At US $ 6.50			At US $ 7.00
Year		Oz	$/oz		Oz	$/oz		Oz	$/oz		Oz	$/oz		Oz	$/oz		Oz	$/oz
2006		50,000	6.00		50,000	6.00		60,000	6.00		66,500	6.00		75,000	6.00		100,000	6.00
		50,000	6.00		50,000	6.00		60,000	6.00		66,500	6.00		75,000	6.00		100,000	6.00

Compañia de Minas Buenaventura S.A.A.

Second Quarter and Six-Month 2006 Results

Page 10 of 14

APPENDIX 4

Compañía de Minas Buenaventura S.A.A. and subsidiaries

Consolidated Balance Sheets
As of December 31, 2005 (audited) and June 30, 2006 (unaudited)

	2005		2006		2006
	S/(000)		S/(000)		US$(000)
Current assets
Cash and cash equivalents		332,102		466,424		143,075
Investment funds		52,884		54,264		16,646
Exchange Traded Funds		—		199,549		61,211
Trade accounts receivable		93,354		134,806		41,352
Other accounts receivable, net		19,089		14,810		4,543
Accounts receivable from affiliates		66,038		62,093		19,047
Inventories, net		94,377		91,641		28,111
Current portion of prepaid tax and expenses		43,182		50,014		15,342
Total current assets		701,026		1,073,601		329,327
Long – term other accounts receivable		5,044		4,983		1,529
Prepaid tax and expenses		12,405		13,524		4,149
Investments in shares		2,502,267		2,814,236		863,263
Mining rights, property, plant and equipment, net		583,281		586,331		179,856
Development costs, net		163,924		169,460		51,982
Other assets		5,303		4,855		1,488
Deferred income tax and workers’ profit sharing asset, net		308,091		372,871		114,378
Total assets		4,281,341		5,039,861		1,545,972

Compañia de Minas Buenaventura S.A.A.

Second Quarter and Six-Month 2006 Results

Page 11 of 14

	2005			2006			2006
	S/(000)			S/(000)			US$(000)
Liabilities and shareholders’ equity, net
Current liabilities
Bank loans		26,229			60,310			18,500
Trade accounts payable		53,089			68,746			21,088
Other current liabilities		204,596			229,517			70,404
Derivative instruments		59,138			1,452			445
Current portion of long-term debt		1,631			2,112			648
Deferred income from sale of future production		107,079			158,409			48,592
Total current liabilities		451,762			520,546			159,677
Long-term other liabilities		96,852			85,224			26,144
Derivative instruments		168,017			—			—
Long-term debt		1,367			930			285
Deferred income from sale of future production		613,791			735,930			225,745
Total liabilities		1,331,789			1,342,630			411,851
Shareholders’ equity, net
Capital stock, net of treasury shares by S/49,659,000		596,755			596,755			183,054
Investment shares, net of treasury shares by S/127,000		1,622			1,622			498
Additional paid-in capital		609,734			609,734			187,035
Legal reserve		129,276			129,276			39,655
Others reserves		923			923			283
Retained earnings		1,598,717			2,376,989			729,138
Cumulative translation loss		(67,962	)		(183,282	)		(56,221	)
Cumulative unrealized gain on investments in shares carried at fair value		240			262			80
		2,869,305			3,532,279			1,083,522
Minority interest		80,247			164,952			50,599
Total shareholders’ equity, net		2,949,552			3,697,231			1,134,121
Total liabilities and shareholders’ equity, net		4,281,341			5,039,861			1,545,972

Compañia de Minas Buenaventura S.A.A.

Second Quarter and Six-Month 2006 Results

Page 12 of 14

Consolidated Statements of Income (not audited)
For the three-month and six-month periods ended June 30, 2005 and 2006

	For the three-month periods ended june 30									For the six-month periods ended june 30
	2005			2006			2006			2005			2006			2006
	S/(000)			S/(000)			US$(000)			S/(000)			S/(000)			US$(000)
Operating revenues
Net sales		232,031			457,875			140,452			451,657			814,679			249,902
Realized income from sale of future production		23,603			42,721			13,105			41,681			85,442			26,209
Royalties income		31,053			49,011			15,034			63,924			92,809			28,469
Total revenues		286,687			549,607			168,591			557,262			992,930			304,580
Costs of operation
Operating costs		89,749			121,190			37,174			174,754			248,826			76,327
Exploration and development costs in operational mining sites		33,721			43,484			13,339			62,389			80,384			24,658
Depreciation and amortization		20,517			23,735			7,281			38,477			43,998			13,496
Total costs of operation		143,987			188,409			57,794			275,620			373,208			114,481
Gross margin		142,700			361,198			110,797			281,642			619,722			190,099
Operating expenses
General and administrative		17,937			28,988			8,892			39,757			56,158			17,226
Exploration costs in non-operational mining sites		21,332			23,787			7,297			40,791			51,771			15,881
Royalties to third parties		7,114			13,214			4,053			13,159			21,883			6,713
Royalties to Peruvian Government		2,138			7,299			2,239			3,692			10,581			3,246
Selling		3,558			5,341			1,639			7,174			9,400			2,883
Amortization of other assets		248			223			68			496			448			137
Total operating expenses		52,327			78,852			24,188			105,069			150,241			46,086
Operating income		90,373			282,346			86,609			176,573			469,481			144,013
Other income (expenses), net
Share in affiliated companies, net		146,106			367,471			112,721			314,034			677,397			207,790
Gain (loss) from change in the fair value of derivative instruments		(4,380	)		(210	)		(64	)		11,441			(44,086	)		(13,523	)
Interest income		4,802			1,567			481			8,736			4,795			1,471
Exchange difference gain (loss)		578			(15,897	)		(4,876	)		(2,079	)		(22,223	)		(6,817	)
Interest expenses		(1,807	)		(1,052	)		(323	)		(2,941	)		(3,078	)		(944	)
Gain (loss) from change in the fair value of exchange traded funds		—			(22,427	)		(6,879	)		—			(22,427	)		(6,879	)
Other, net		(3,325	)		5,124			1,571			(8,816	)		4,773			1,463
Total other income, net		141,974			334,576			102,631			320,375			595,151			182,561
Income before workers’ profit sharing, income tax and minority interest		232,347			616,922			189,240			496,948			1,064,632			326,574
Workers’ profit sharing		8,094			(19,680	)		(6,037	)		1,762			(11,787	)		(3,616	)
Income tax		19,225			(82,689	)		(25,365	)		(11,502	)		(68,709	)		(21,076	)
Net income before minority interest		259,666			514,553			157,838			487,208			984,136			301,882
Minority interest		(8,546	)		(64,455	)		(19,771	)		(19,838	)		(114,111	)		(35,003	)
Net income		251,120			450,098			138,067			467,370			870,025			266,879
Basic and diluted earnings per share		1.97			3.54			1.09			3.67			6.84			2.10
Weighted average number of shares outstanding		127,236,219			127,221,164			127,221,164			127,236,219			127,221,164			127,221,164

Compañia de Minas Buenaventura S.A.A.

Second Quarter and Six-Month 2006 Results

Page 13 of 14

Consolidated Statements of Cash Flows (unaudited)
For the three-month and six-month periods ended June 30, 2005 and 2006

	For the three-month periods ended june 30									For the six-month periods ended june 30
	2005			2006			2006			2005			2006			2006
	S/(000)			S/(000)			US$(000)			S/(000)			S/(000)			US$(000)
Operating activities
Collection from customers		191,905			431,152			132,255			437,709			773,227			237,186
Collection of dividends		86,503			128,226			39,333			129,180			259,870			79,715
Collection of royalties		34,255			42,992			13,188			70,505			98,630			30,255
Recoveration of value added tax receivable		6,277			7,650			2,347			12,929			31,460			9,650
Collection of interest		4,222			1,462			448			7,883			4,214			1,293
Payments to suppliers and third parties		(100,669	)		(148,888	)		(45,671	)		(215,345	)		(293,749	)		(90,108	)
Purchase of Exchange Traded Funds (ETF)		—			(222,841	)		(68,356	)		—			(222,841	)		(68,356	)
Payments to employees		(42,725	)		(43,476	)		(13,336	)		(84,702	)		(108,731	)		(33,352	)
Payments of exploration expenditures		(45,478	)		(50,761	)		(15,571	)		(87,296	)		(103,594	)		(31,778	)
Payments of income tax		(32,237	)		(51,430	)		(15,776	)		(45,844	)		(79,224	)		(24,302	)
Payments of royalties		(15,782	)		(17,353	)		(5,323	)		(22,021	)		(31,509	)		(9,665	)
Payments of interest		(1,807	)		(1,052	)		(323	)		(2,941	)		(3,078	)		(944	)
Net cash provided by operating activities		84,464			75,681			23,215			200,057			324,675			99,594
Investing activities
Purchase of plant and equipment		(13,519	)		(30,255	)		(9,281	)		(21,574	)		(52,651	)		(16,151	)
Decrease (increase) on time deposits		6,930			(32,590	)		(9,997	)		13,860			(32,590	)		(9,997	)
Development cost expenditures		(14,992	)		(15,558	)		(4,772	)		(25,090	)		(28,233	)		(8,660	)
Payments from derivative instruments settled, net		(5,907	)		(3,694	)		(1,133	)		(13,207	)		(12,821	)		(3,933	)
Payments by purchase of investments in shares		(504,040	)		(798	)		(245	)		(504,040	)		(10,002	)		(3,068	)
Decrease (increase) of investment fund		4,053			—			—			38,869			(3,290	)		(1,009	)
Proceeds from sale of plant and equipment		1,372			121			37			1,372			378			116
Net cash used in investing activities		(526,103	)		(82,774	)		(25,391	)		(509,810	)		(139,209	)		(42,702	)
Financing activities
Increase of bank loans, net		53,747			42,902			13,160			52,114			34,081			10,454
Increase (decrease) of long-term debt		(10,363	)		(645	)		(198	)		(22,702	)		44			13
Payments of dividends for minority interest shareholders		(18,250	)		(11,919	)		(3,656	)		(18,250	)		(26,106	)		(8,008	)
Payments of dividends		(74,388	)		(91,753	)		(28,145	)		(74,388	)		(91,753	)		(28,145	)
Net cash used in financing activities		(49,254	)		(61,415	)		(18,839	)		(63,226	)		(83,734	)		(25,686	)
Net increase (decrease) in cash during the period		(490,893	)		(68,508	)		(21,015	)		(372,979	)		101,732			31,206
Cash at beginning of period		708,521			502,342			154,093			590,607			332,102			101,872
Cash at period-end		217,628			433,834			133,078			217,628			433,834			133,078

Compañia de Minas Buenaventura S.A.A.

Second Quarter and Six-Month 2006 Results

Page 14 of 14

Consolidated Statements of Cash Flows (unaudited)

	For the three-month periods ended june 30									For the six-month periods ended june 30
	2005			2006			2006			2005			2006			2006
	S/(000)			S/(000)			US$(000)			S/(000)			S/(000)			US$(000)
Reconciliation of net income to net cash provided by Operating activities
Net income		251,120			450,098			138,067			467,370			870,025			266,879
Add (deduct)
Minority interest		8,546			64,455			19,771			19,838			114,111			35,003
Depreciation and amortization		20,502			24,635			7,557			39,008			45,632			13,998
Loss (gain) from change in the fair value of derivative instruments		4,380			210			64			(11,441	)		44,086			13,523
Amortization of development costs		9,590			13,544			4,155			15,586			23,136			7,097
Exchange difference loss (gain),net		(578	)		15,897			4,876			2,079			22,223			6,817
Loss from change in the fair value of Exchange
Traded Funds (ETF)		—			22,427			6,879			—			22,427			6,879
Long-term officers’ compensation, net *		—			2,570			788			—			6,341			1,945
Net cost of retired plant and equipment		209			145			44			641			588			180
Amortization of other assets		248			223			68			496			448			137
Accretion Expenses		974			(4,155	)		(1,274	)		1,948			160			49
Share in affiliated companies, net of dividends		(59,603	)		(239,245	)		(73,388	)		(184,854	)		(417,527	)		(128,076	)
Realized income from sale of future production		(23,603	)		(42,721	)		(13,105	)		(41,681	)		(85,442	)		(26,209	)
Loss (gain) for deferred income tax and workers’ profit sharing expenses		(52,183	)		12,569			3,856			(45,443	)		(64,780	)		(19,871	)
Loss (gain) from change in the fair value of investment funds		(1,469	)		(197	)		(60	)		(1,578	)		(744	)		(228	)
Other		(3,904	)		—			—			2,382			—			—
Net changes in assets and liabilities accounts
Decrease (increase) of operating assets -
Exchange Traded Funds		—			(222,841	)		(68,356	)		—			(222,841	)		(68,356	)
Trade accounts receivable		(40,126	)		(26,723	)		(8,197	)		(13,948	)		(41,452	)		(12,715	)
Other accounts receivable		(4,021	)		1,943			596			(707	)		4,340			1,331
Accounts receivable from affiliates		1,886			(5,863	)		(1,798	)		6,960			3,945			1,210
Inventories		(5,507	)		(1,091	)		(334	)		(8,514	)		2,375			729
Prepaid tax and expenses		(13,730	)		(4,205	)		(1,290	)		(11,786	)		(7,951	)		(2,439	)
Increase (decrease) of operating liabilities -
Trade accounts payable		(10,416	)		20,883			6,406			(13,812	)		15,657			4,804
Other liabilities		2,149			(6,877	)		(2,110	)		(22,487	)		(10,082	)		(3,093	)
Net cash provided by operating activities		84,464			75,681			23,215			200,057			324,675			99,594
Transaction that did not affect cash flows:
Transfer from derivative instruments to deferred income from sale of future production		172,540			—			—			172,540			258,911			79,421

(*) This provision corresponds to a long term compensation (10 year program) granted to the Company to certain officers

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Compañía de Minas Buenaventura S.A.A.

/s/ CARLOS E. GALVEZ PINILLOS

Carlos E. Gálvez Pinillos

Chief Financial Officer

Date: July 26, 2006