April 2021

The Company

Is a solid, professional and flexible company, whose production of oil and natural gas has grown, since its

inception, uninterrupted. 100% Argentine capital. 100% Argentine management.

Oilstone is made up of 300 people who operate 12 concessions covering an area of 2.500 km2.

Oilstone Energía S.A. is an independent Argentine Oil & Gas Company founded in

2010, that explore and produce hydrocarbons.

MISSION

Produce the hydrocarbons necessary for the development of economies, in a framework of respect for the

environment and meeting strict safety standards.

VISION

Operate oilfields in Argentina and in the region, applying all the capabilities and resources currently owned by the

Company.

1

2

History

The disposition of its technical equipment in the fields, the ability of adaptation to different situations and the fast

speed of implementation of the projects, allowed to increase year after year the production of oil and natural gas.

Since its beginnings, Oilstone has grown steadily over 10 years.

3

Board & ManagementBOARD

MANAGEMENT

Diego Garzón Duarte

Mauricio Russo

Augusto Terracini

Eduardo Aragón

Gonzalo Maggi

Claudio Maggi

Pablo Chiara

María Massa

Chairman

Vice-chairman

Director

Director

Director

Director

Alternative Member

Alternative Member

Diego Garzón Duarte / CEO 33 years of experience: CGC, Accenture, Techint

Mauricio Russo / Commercial Director 32 years of experience: CGC, Pérez Companc

Augusto Terracini / CFO 34 years of experience: Providian, Banco Galicia, Accenture

Eduardo Aragón / Operations Director 30 years of experience: Pluspetrol, Petroandina, YPF, Astra

Diego Lenge / Geosciences Director25 years of experience: YPF, PESA, Schlumberger, YSUR

4

Milestones

BEGINNINGSOilstone’s Foundation.

EXPANSIONOperations begin

at Area Dorsal under Contract with GyP.

NEW ACQUISITIONAcquired 100%

of YPF’s concession at Cerro Bandera.

BEGINNING OF OPERATIONSOperations begin at Cerro Bandera under SOAR Contract with YPF.

GROWTHBeginning of UT Dorsal’s Contract at operations of Area Dorsal.(GyP 60% / Oilstone 40%).

MORE AREAS OF EXPLOTATIONNew areas: Anticlinal Campamento, Al Sur de la Dorsal, Dos Hermanas and Ojo de Agua.Acquired 100% of YPF’s concessions.

5

AreasOilstone operates 12 exploration concessions comprising an area of 2,500 km2

of the Neuquén Basin.

6

CERRO BANDERA

• Located in the southern portion of the Neuquén Basin, 30 km west of Cutral-Có, in the province of Neuquén. • Holder of 100% of the concession.• End of Concession: November 2027.

DOS HERMANAS

• Located in the southern portion of the Neuquén Basin, 20 and 25 km southeast of Cutral-Có, in the province of Neuquén. • Holder of 100% of the concession. • End of Concession: December 2028.

OJO DE AGUA

• Located in the southern portion of the Neuquén Basin, 30 km southeast of Cutral-Có, in the province of Neuquén. • Holder of 100% of the concession. • End of Concession: February 2032.

PUESTO CORTADERA

• Located in the southern portion of the Neuquén Basin, 17 km south of Cutral Có, in the province of Neuquén. • Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: December 2039.

ANTICLINAL CAMPAMENTO

• Located in the southern portion of the Neuquén Basin, 40 km west of Cutral-Có, in the province of Neuquén.• Holder of 100% of the concession.• End of Concession: January 2026.

AL SUR DE LA DORSAL

• Located in the southern portion of the Neuquén Basin, west, south and southeast of Cutral-Có, in the province of Neuquén. • Holder of 100% of the concession. • End of Concession: October 2026.

7

PORTEZUELO MINAS

• Located in the southern portion of the Neuquén Basin, 19 km south of Cutral Có, in the province of Neuquén. • Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: February 2039.

LOMA NEGRA NI

• Located in the southern portion of the Neuquén Basin, 19 km north of Cutral Có, in the province of Neuquén. • Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: December 2039.

COLLÓN CURÁ

• Located in the southern portion of the Neuquén Basin, 16 km west of Cutral Có, in the province of Neuquén. • Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: December 2039.

BAJO BAGUALES

• Located in the southern portion of the Neuquén Basin, 28 km east of Cutral Có, in the province of Neuquén. • Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: December 2039.

NEUQUÉN DEL MEDIO

• Located in the southern portion of the Neuquén Basin, 41 km east of Cutral Có, in the province of Neuquén. • Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: December 2039.

CUTRAL CÓ SUR

• Located in the southern portion of the Neuquén Basin, 12 km south of Cutral Có, in the province of Neuquén.• Contract: Transitory Union, GyP 60% / Oilstone 40%. • End of Concession: December 2039.

8

YPF S.A.PAN AMERICAN ENERGY SLPLUSPETROL S.A.VISTA OIL & GAS ARGENTINA SAUSINOPEC ARGENTINA EXPLORATION AND PRODUCTION, INC.SHELL ARGENTINA S.A.TECPETROL S.A.COMPAÑÍAS ASOCIADAS PETROLERAS S.A.TOTAL AUSTRAL S.A.CAPEX S.A.PETROQUIMICA COMODORO RIVADAVIA S.A.CHEVRON ARGENTINA S.R.L.ENAP SIPETROL ARGENTINA S.A.EXXONMOBIL EXPLORATION ARGENTINA S.R.L.PETROLEOS SUDAMERICANOS S.A.COMPAÑÍA GENERAL DE COMBUSTIBLES S.A.ROCH S.A.PRESIDENT PETROLEUM S.A.OILSTONE ENERGIA S.A.PETROLERA EL TREBOL S.A.GEOPARK ARGENTINA LTD. (SUCURSAL ARGENTINA)MEDANITO S.A.WINTERSHALL DEA ARGENTINA S.ASAN JORGE PETROLEUM S.A.PETROLERA ACONCAGUA ENERGIA S.A.PLUSPETROL ENERGY S.A.KILWER S.A.PAMPETROL S.A.P.E.MMADALENA ENERGY ARGENTINA SRL HIGH LUCK GROUP LTD. - SUCURSAL ARGENTINACOLHUE HUAPI S.A.INGENIERIA ALPA S.A.JEMSE - JUJUY ENERGIA Y MINERIA S. E.SELVA MARIA OIL S.A.CAPETROL S.A.CAPETROL ARGENTINA S.A.HATTRICK ENERGY SASENERGIA COMPAÑIA PETROLERA S.A.QUINTANA E&P ARGENTINA S.R.L.PAMPA ENERGIA S.A.GRECOIL Y CIA. S.R.L.ALIANZA PETROLERA ARGENTINA S.A.PETROFARO S.A.PETROLERA DEL COMAHUE S.A.INGENIERIA SIMA S.A.COPESA CIA CONSTRUCTORA PETROLERA SACROWN POINT ENERGIA S.A.ENERGICON S.A.PETROLERA PAMPA S.A. PETROLERA SAN MIGUEL S.A.PETROMINERA CHUBUT S.E.CHAÑARES ENERGIA S.A.

6.428.481 2.796.340

744.310 688.310 405.093 383.993 332.152 322.661 252.474 205.147 200.847 196.675 131.664

89.077 85.383 73.616 62.278 47.867 43.923 42.051 36.518 24.690 22.358 20.600 17.390 17.273 14.360 13.914 13.629 12.069

9.781 6.769 5.713 5.667 5.296 4.057 3.810 3.698 3.371 1.384 1.195

647 222

38 38

0 0 0 0 0 0 0

123456789

10111213141516171819202122232425262728293031323334353637383940414243444546474849505152

46,66%20,30%

5,40%5,00%2,94%2,79%2,41%2,34%1,83%1,49%1,46%1,43%0,96%0,65%0,62%0,53%0,45%0,35%0,32%0,31%0,27%0,18%0,16%0,15%0,13%0,13%0,10%0,10%0,10%0,09%0,07%0,05%0,04%0,04%0,04%0,03%0,03%0,03%0,02%0,01%0,01%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%

Ranking of operatorsNº OPERATOR

TOTAL 13.776.828 100%

OIL PRODUCTION (FEBRUARY 2021)

VOLUME

Bbl %

Oilstone is ranked 19th among Oil Operators

TOTAL AUSTRAL S.A.YPF S.A.TECPETROL S.A.PAN AMERICAN ENERGY SLPAMPA ENERGIA S.A.COMPAÑÍA GENERAL DE COMBUSTIBLES S.A.PLUSPETROL S.A.ENAP SIPETROL ARGENTINA S.A.CAPEX S.A.VISTA OIL & GAS ARGENTINA SAUPLUSPETROL ENERGY S.A.EXXONMOBIL EXPLORATION ARGENTINA S.R.L.OILSTONE ENERGIA S.A.SINOPEC ARGENTINA EXPLORATION AND PRODUCTION, INC.PETROQUIMICA COMODORO RIVADAVIA S.A.SHELL ARGENTINA S.A.ROCH S.A.SELVA MARIA OIL S.A.CHEVRON ARGENTINA S.R.L.PRESIDENT PETROLEUM S.A.PETROLEOS SUDAMERICANOS S.A.GEOPARK ARGENTINA LTD. (SUCURSAL ARGENTINA)COMPAÑÍAS ASOCIADAS PETROLERAS S.A.MEDANITO S.A.MADALENA ENERGY ARGENTINA SRL PETROFARO S.A.PETROLERA EL TREBOL S.A.WINTERSHALL DEA ARGENTINA S.ASAN JORGE PETROLEUM S.A.JEMSE - JUJUY ENERGIA Y MINERIA S. E.PAMPETROL S.A.P.E.MKILWER S.A.PETROMINERA CHUBUT S.E.PETROLERA ACONCAGUA ENERGIA S.A.CAPETROL ARGENTINA S.A.INGENIERIA ALPA S.A.COLHUE HUAPI S.A.GRECOIL Y CIA. S.R.L.ENERGIA COMPAÑIA PETROLERA S.A.QUINTANA E&P ARGENTINA S.R.L.HIGH LUCK GROUP LTD. - SUCURSAL ARGENTINAALIANZA PETROLERA ARGENTINA S.A.CAPETROL S.A.COPESA CIA CONSTRUCTORA PETROLERA SACROWN POINT ENERGIA S.A.ENERGICON S.A.HATTRICK ENERGY SASINGENIERIA SIMA S.A.PETROLERA DEL COMAHUE S.A.PETROLERA PAMPA S.A. PETROLERA SAN MIGUEL S.A.CHAÑARES ENERGIA S.A.

31.673.244 28.762.044 12.449.323 12.072.174

6.127.001 4.790.950 4.018.784 3.455.039 1.468.496 1.330.665 1.100.994 1.017.574

980.897 905.614 684.026 530.094 451.236 356.309 219.661 166.884 145.755 132.062 117.217

86.590 46.313 33.972 28.128 18.261 11.103

9.574 7.021 6.990 6.582 5.541 3.955 3.496 3.294 1.878 1.849 1.082

422 29

0 0 0 0 0 0 0 0 0 0

123456789

10111213141516171819202122232425262728293031323334353637383940414243444546474849505152

27,97%25,40%10,99%10,66%

5,41%4,23%3,55%3,05%1,30%1,18%0,97%0,90%0,87%0,80%0,60%0,47%0,40%0,31%0,19%0,15%0,13%0,12%0,10%0,08%0,04%0,03%0,02%0,02%0,01%0,01%0,01%0,01%0,01%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%0,00%

Ranking of operatorsNº OPERATOR

TOTAL 113.232.122 100%

NATURAL GAS PRODUCTION (FEBRUARY 2021)

VOLUME

KCF %

Oilstone is ranked 13th among Natural Gas Producers

9

10

BusinessOilstone is a company that explores and operates oil and natural gas deposits.

From its beginnings, it grew uninterrupted until becoming an important operator

in Argentina.

Main indicators:

0

2

4

6

8

10

12

14

2011 2015 2020

OPERATED AREAS

0

2.500

2.000

1.500

1.000

500

2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021(E)

OILSTONE’S WI PRODUCTION OPERATED PRODUCTION

OIL PRODUCTION (bbl per day)

0

400

350

300

250

200

150

100

50

2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021(E)

OILSTONE’S WI PRODUCTION OPERATED PRODUCTION

NATURAL GAS PRODUCTION (millions of cubic feet)

0

60.000

50.000

40.000

30.000

20.000

10.000

2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021(E)

OILSTONE’S WI PRODUCTION OPERATED PRODUCTION

PRODUCTION (BOE per day)

11

0

100.000

200.000

300.000

400.000

500.000

600.000

700.000

2011 2015 2020

SURFACE OPERATED (acres)

0

200

400

600

800

1.000

1.200

1.400

2011 2015 2020

DRILLED WELLS

0

5

10

15

20

25

30

35

40

2011 2015 2020

FACILITIES

0

20

40

60

80

100

120

140

2011 2015 2020

TANKS

0

140.000

120.000

100.000

80.000

60.000

40.000

20.000

2011 2015 2020

TANKS CAPACITY (bbl)

0

50

100

150

200

250

300

350

2011 2015 2020

STAFF

OWN OUTSOURCED

A developing countryneeds new companies

that generate the energyneeded for growth.

Oilstone was born to helpproducing Oil & Gas in Argentina.

More Oil. More Gas.

More Energy.

OILSTONE ENERGIA S.A.

Central OfficePlaza Rocha Building - Dardo Rocha 986, Second floor

(B1640FSD) Martínez - Buenos Aires, Argentina - Phone: (+54 11) 5244.7888

Neuquén OfficePrincipal Saez 792

(8322) Cutral Có - Neuquén, Argentina - Phone: (+54 299) 436.1993

info@oilstone.com.ar / www.oilstone.com.ar