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TSX GPR | NYSE American GPL CORPORATE PRESENTATION greatpanther. com July 2020 Cautionary Statements Forward Looking Statements Note on Preliminary Economic Assessment & Inferred Resources This presentation contains forward-looking


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TSX GPR | NYSE American GPL

  • greatpanther. com

July 2020

CORPORATE PRESENTATION

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TSX GPR | NYSE American GPL

Cautionary Statements

Forward Looking Statements This presentation 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 the Securities Act (Ontario) (together, "forward-looking statements"). Such forward- looking statements may include but are not limited to the Company's plans for production at Tucano in Brazil, Guanajuato Mine Complex (“GMC”) and Topia in Mexico, Coricancha in Peru and exploring its other, the overall economic potential of its properties, timing and cost to the Company of reactivating the Coricancha, anticipated processing and production rates that may be achieved at the Coricancha upon reactivation, the ultimate cost of reclaiming legacy tailings facilities, results of exploration and potential changes to the Coricancha resource base, the availability of adequate financing, and involve known and unknown risks, uncertainties and

  • ther factors which may cause the actual results, performance or achievements expressed or

implied by such forward-looking statements to be materially different. Such factors include, among others, risks and uncertainties relating to potential political risks involving the Company's operations in a foreign jurisdiction, technical and operational difficulties that may be encountered with reactivation of the Coricancha, uncertainty of production and cost estimates and the potential for unexpected costs and expenses, uncertainty in mineral resource estimation, physical risks inherent in mining and reclamation operations, currency fluctuations, fluctuations in the price of silver, gold and base metals, completion of economic evaluations, changes in project parameters as plans continue to be refined, permitting risks, the inability or failure to obtain adequate financing on a timely basis, and other risks and uncertainties, including those described in the Company's Annual Information Form for the year ended December 31, 2018 and Material Change Reports filed with the Canadian Securities Administrators available at www.sedar.com and reports on Form 40-F and Form 6-K filed with the Securities and Exchange Commission and available at www.sec.gov. Statements concerning mineral reserve and resource estimates may also be deemed to constitute forward-looking statements to the extent that they involve estimates of the mineralization that will be encountered if the property is developed. Any statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as “expects”, “anticipates”, “plans”, “projects”, “estimates”, “assumes”, “intends”, “strategy”, “goals”, “objectives”, “potential” or variations thereof, or stating that certain actions, events or results “may”, “could”, “would”, “might” or “will” be taken, occur or be achieved, or the negative of any of these terms and similar expressions) are not statements of historical fact and may be forward-looking statements. The technical information contained in this presentation has been reviewed and approved by Robert F. Brown, P. Eng., for Topia, GMC, and Coricancha, and by Fernando A. Cornejo, P. Eng., Vice President Operations, Brazil, and Nick Winer, Vice President Exploration, for Tucano. All are Qualified Persons (QPs) for the purpose of National Instrument 43-101. Note on Preliminary Economic Assessment & Inferred Resources The mine plan evaluated in the PEA is preliminary in nature and additional technical studies will need to be completed in order to fully assess its viability. There is no certainty that a production decision will be made to reactivate Coricancha. In addition, we may determine to proceed with a production decision without completion of customary feasibility studies demonstrating the economic viability of reactivation of Coricancha. A mine production decision that is made without a feasibility study carries additional potential risks which include, but are not limited to, (i) increased uncertainty as to projected initial and sustaining capital costs and operating costs, rates of production and average grades, and (ii) the inclusion of Inferred Mineral Resources, as defined by NI 43-101 and CIM Definition Standards (see Cautionary Note to United States Investors below) that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be converted to a Mineral Reserve, as defined by NI 43-101 and CIM Definition Standards (see Cautionary Note to United States Investors below). Mine design and mining schedules, metallurgical flow sheets and process plant designs may require additional detailed work and economic analysis and internal studies to ensure satisfactory operational conditions and decisions regarding future targeted

  • production. In addition, the results of the Bulk Sample Program may impact on the projected

capital and operating costs, with the result that the projected NPV, IRR and cash flows may be adversely impacted. Readers are cautioned not to assume that any part or all of Mineral Resources used in this PEA will ever be converted into reserves. Inferred Mineral Resources, in particular, have a great amount of uncertainty as to their existence and/or economic and legal feasibility and readers are cautioned not to assume that they will ever be upgraded to a higher category. Under Canadian standards, estimates of Inferred Mineral Resources may form part of preliminary economic assessment, but may not form the basis of feasibility or pre-feasibility studies, except in rare cases. Mineral Resources that are not Mineral Reserves, do not, by definition, have demonstrated economic viability. Note to United States Investors Great Panther prepares its disclosure in accordance with the requirements of securities laws in effect in Canada which differ from the requirements of U.S. securities laws. Terms relating to mineral resources and mineral reserves in this presentation in respect of Great Panther are defined in accordance with National Instrument 43-101-Standards of Disclosure for Mineral Projects under the guidelines set out in the Canadian Institute of Mining, Metallurgy. The Securities and Exchange Commission (the ‘‘SEC’’) permits mining companies, in their filings with the SEC, to disclose only those mineral deposits that a company can economically and legally extract or produce. This presentation uses certain terms, such as, ‘‘measured mineral resources’’, ‘‘indicated mineral resources’’ and ‘‘inferred mineral resources’’, that the SEC does not recognize (these terms may be used in this presentation and are included in the public filings of Great Panther which have been filed with securities commissions or similar authorities in Canada

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TSX GPR | NYSE American GPL

COVID-19 Update

Health and safety of our people and communities is a core value

  • All confirmed cases of COVID-19 are in isolation and being monitored by Company health

professionals with regular reports to health authorities

  • Proactive measures:
  • Travel restrictions and flexible, remote working plans
  • Supervision, monitoring and rapid response plans in place
  • Medical screening at plant gate and identification of high-risk employees
  • Limited external visitors and extensive cleaning procedures
  • Tucano donated 1,000 quick COVID-19 test kits, surgical masks and other materials to

the communities of Pedra Branca and Serra de Navio

  • Operational contingencies:
  • Stockpiling of ore
  • Procedures in event of outbreak/shutdown
  • Strengthening supply chains
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TSX GPR | NYSE American GPL

Q1 2020 Highlights

A solid start to 2020

  • Delivered significant growth in revenue, mine operating earnings and operating cash flow
  • Produced 34,725 Au eq oz, a 134% increase over Q1 2019 as a result of the Tucano acquisition
  • Revenue of $48.1M and delivered cash flow from operations of $11.8M
  • Ended Q1 with $39M cash and no net debt on a proforma basis reflecting May 2020 financing

Tucano gold mine

  • Produced 26,176 oz gold, a 12% increase over Q1 2019
  • Announced inaugural Mineral Reserve and Mineral Resource Estimates
  • Achieved a 47% increase in material movement
  • Launched $6.6M, 55,000m exploration program focused on near mine resources
  • 2020 guidance of 120,000-130,000 oz gold at AISC of $1,150-$1,250/oz

Mexican silver operations

  • Produced 769,429 silver equivalent oz
  • 25,000m exploration program underway at GMC
  • 2020 GMC guidance of 1.2M-1.4M silver eq oz at AISC of $13.00-$14.00/oz
  • Mexican operations resumed at end of May
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TSX GPR | NYSE American GPL

Investment Highlights

A growing gold and silver producer focused

  • n the Americas

Diversified portfolio of assets in Brazil, Mexico and Peru Actively exploring large land packages in highly prospective districts Pursuing acquisition

  • pportunities to

complement existing portfolio Strong management and board of directors Focus on continuous improvement in operations Attractive re-rating potential

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Gold and Silver Production in the Americas

TOPIA

Primary Silver Producer

GUANAJUATO MINE COMPLEX

Silver-Gold Producer

TUCANO

Gold Producer

CORICANCHA

Primary Gold-Silver Development Project

2020 Guidance 146,000 - 158,000 Au eq oz

Producing mine Development project Exploration project

ARGOSY PLOMO EL HORCÓN SANTA ROSA

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TSX GPR | NYSE American GPL

Strong Management and Board

NAME BACKGROUND

Rob Henderson, P.Eng., MBA President and CEO Director since April 2020. Seasoned mining executive with 35 years of experience in operations, capital projects, and mining finance Neil Hepworth, M.Sc. (Eng) COO More than 30 years of experience in underground and open pit mining; extensive experience in Latin America Jim Zadra, CPA, CA, MBA CFO Over 15 years of experience in senior corporate finance roles: financial reporting, taxation, strategic planning, capital markets, and M&A Fernando Cornejo, P.Eng VP Operations, Brazil Over 20 years of mining experience working in Mexico, Peru and Brazil with Jacobs Engineering, SGS Minerals, Rio Tinto Iron Ore and BHP Billiton Brian Peer, B.Sc. (Geology) VP Operations, Mexico More than 30 years of mining experience; prior roles with Alamos, Coeur and Barrick Nick Winer, B.Sc. (Geology) VP Exploration Over 33 years of experience in mineral exploration with a focus on South America, including more than 20 years in Brazil; prior roles with AngloGold and BHP Mariana Fregonese VP Social Responsibility Over 13 years of mining experience focused on building strategic partnerships and fostering relationships with various stakeholders Lucie Gagnon, BA VP People and Culture Over 15 years of human resources experience focused in the finance and mining industry; previously with Kinross Meghan Brown, MBA VP Investor Relations MBA with 25 years of investor relations experience in metals and mining; extensive experience in Latin America; prior roles with Leagold, Endeavour Silver, and Placer Dome

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TSX GPR | NYSE American GPL

Strong Management and Board

NAME BACKGROUND

David Garofalo, CPA, CA, ICD.D Independent Chair Director and Chair since April 2020. Former President and CEO of Goldcorp; over 30 years of experience in mining finance, governance, and strategic leadership; extensive experience in LatAm Rob Henderson, P.Eng., MBA President and CEO Director since April 2020. Seasoned mining executive with 35 years of experience in operations, capital projects, and mining finance Joseph Gallucci, MBA Independent Director Director since April 2020. Over 15 years of experience in investment banking and equity research; currently Managing Director and Head of Mining Investment Banking at Laurentian Bank Securities Bob Garnett, CPA, CA, ICD.D Independent Director Director since 2011. Over 50 years of board experience; Chair of $10B financial institution and Vice- Chair of $12B transportation authority. Extensive TSX, NASDAQ and NYSE board experience Alan Hair, P.Eng, ICD.D Independent Director Director since April 2020. Senior executive with over 36 years of experience in the mining and metals industry, including former President and CEO of Hudbay John Jennings, MBA, CFA Independent Director Director since 2012. Over 30 years of board governance experience; 40-year career in precious metals sell-side mining research, investment banking, and Director and C-Suite executive search W.J. (Jim) Mullin, P.Eng. Independent Director Director since 2013. Formerly Senior Vice President of North American Operations for Newmont. Over 30 years experience with the operation of open pits, underground mines and processing plants Elise Rees, FCPA, FCA, ICD.D Independent Director Director since 2017. 35-year career with Ernst & Young; retired Managing Partner of Transaction Advisory for BC; specialist in tax and M&A. Over 30 years of board governance experience Kevin Ross, P.Eng., MBA Independent Director Director since 2019. Over 40 years experience in open pit and U/G operations and brownfield processing plant expansions. COO of Orca Gold, with 20 years of C-Suite operations experience

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52 41 106

2018 2019 2020 Brazil Mexico

147 41% 46% 14% 83% 12% 5%

Near-Term Growth

Note: 2018 Au eq oz calculated using an 80:1 Ag:Au ratio, and ratios of 1:0.06364 and 1:0.0818 for the price/ounce of silver to price/pound of lead and zinc, respectively.

▪Au ▪Ag ▪Base Metals

Revenue by Metal 2018 2019

2020 Growth

K Au eq oz

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TSX GPR | NYSE American GPL

Jun 2019 Sep 2019 Dec 2019 Mar 2020 (proforma*)

Financial Strength

  • $39M cash position at March 31,

2020

  • Financing completed on May 20,

2020 for $15M net proceeds*

  • $25M ATM unutilized
  • Positive working capital
  • No net debt on a proforma basis

reflecting May 2020 financing

Improved Financial Position Cash and Equivalents ($M)

37 39 15

* $15M estimated net proceeds from May 2020 bought deal financing

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TSX GPR | NYSE American GPL

Exploration and Development Upside

BRAZIL 55,000 metres – $7M (2020)

  • 50/50 Near-Mine/Regional split
  • Regional upside 2,350km2

PERU Potential Restart: ~40K Au eq oz/yr

  • Potential 4th mine
  • Fully permitted with positive PEA

Producing mine Development project Exploration project

ARGOSY PLOMO EL HORCÓN SANTA ROSA

MEXICO 25,000 metres – $4M (2020)

  • Define new mineralized zones
  • Develop high-grade resources at Guanajuato

TUCANO

CORICANCHA

GMC TOPIA

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Tucano – Brazil

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TSX GPR | NYSE American GPL

Tucano

MINE TYPE Open Pit

  • Avg. ore tonnes mined (Mt/yr)

~3.15

  • Avg. waste tonnes mined (Mt/yr)

~22.3 2019 production (Au oz) 123,867 PROCESSING TYPE Conventional CIL

  • Avg. ore tonnes processed(Mt/yr)

~3.5 Recovery – CIL ~92% Current LOM sulphide ore (%) ~80% Tailings type Low Height Downstream TSF

  • 2019 production: 124,000 Au oz
  • Operating open pit gold mine
  • Large land package on Guyana greenstone belt
  • ~US$30 million in plant upgrades in 2018-2019
  • Improved mining productivities and gold recoveries

TUCANO | 100% OWNED | AMAPÁ, BRAZIL

Tucano

Tucano

Tucano Significant Gold Deposits Lower Proterozoic Terrain

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Tucano – Highly Prospective Land Package

Large, highly prospective land package:

  • Greenstone belt on Guyana Shield
  • Host to some of the world’s largest gold deposits
  • Near-term resource growth opportunities with multiple in-mine and longer-term exploration
  • ptionality

Tucano Significant gold deposits Lower Proterozoic terrain

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Tucano – Reserve Replacement

Objective: Convert 150,000 oz of resources to reserves

  • A focused drilling program at TAP AB1 – AB3
  • Areas of inferred resources to be drilled to indicated status
  • Target resources are below the current $1,350/oz reserve pit shell

and above $1,500/oz pit shell

TAP AB1 TAP AB3 Urucum UG Urucum E Torres TAP C Neo

AB1 — Sec N 93,980 Section showing inferred resources and planned holes (purple)

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Tucano – Regional Exploration Potential

  • Largely unexplored Proterozoic greenstone belt with significant package of reactive

chemical sediments (BIFs, carbonates etc.) wedged between dominantly mafic volcanic and clastic sediments, intruded by multiple granite phases

  • Initial regional surveys by

BHP and AGA pre-2000

  • Since 1999, only very

limited exploration carried out, primarily by Beadell

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Tucano – Urucum North Underground Potential

  • AMC completed a pre-feasibility study in 2016 for an underground mine at Urucum North
  • Reserves estimated using US$1,120/oz
  • Company to evaluate underground potential with revised metal prices and cost estimates
  • Follow up drilling part of near mine exploration
  • Preliminary concept of developing the underground mining in three stages
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Mexican Operations

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Guanajuato Mine Complex (Ag-Au)

MINE TYPE Underground Mining method Cut and fill 2019 Ag eq oz production 1,517,853 PROCESSING TYPE Conventional Flotation Products Silver and gold concentrate 2019 ore tonnes processed 187,610 2019 recoveries (Ag/Au %) ~84.7%/85.2% Tailings type Conventional and dry-stack

GMC | 100% OWNED | GUANAJUATO, MEXICO

Historically one of Mexico’s most prolific mining districts

Silver equivalent ounces for 2019 were calculated using an 80:1 Ag:Au ratio.

  • ~1.5 M Ag eq oz/yr (19K Au eq oz)
  • Operating silver-gold mine production, long lived

assets

  • Exploration in 2019-2020 to extend mine life
  • Central mill processing facility fed by two mines
  • San Ignacio discovered in 2010, in production 2014

Exploration drilling metres: 8,500m Exploration drilling metres: 14,400m

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Topia (Ag-Au-Pb-Zn)

  • ~1.8 M Ag eq oz/yr (22.5K Au eq oz)
  • Silver-gold-lead-zinc mine production
  • Multi-mine district-scale property

MINE TYPE Underground Mining method Cut and fill 2019 Ag eq oz production 1,785,483 PROCESSING TYPE Conventional Flotation Products Zinc and lead concentrates 2019 ore tonnes processed 79,257 2019 recoveries (Ag/Au %) 93.9%/55.9% Tailings type Dry stack TSF

TOPIA | 100% OWNED | DURANGO, MEXICO

Silver equivalent ounces for 2019 calculated using 80:1 Ag:Au ratio, and ratios of 1:0.0636 and 1:0.0818 for the price/ounce of silver to price/pound of lead and zinc, respectively.

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Coricancha (Au-Ag-Pb-Zn-Cu)

  • 3.1 M Ag eq oz or ~40,000 Au eq oz annual

production potential, per 2018 PEA

  • 90 km east of Lima, Peru
  • Bulk sample program completed in June 2019,

results support key assumptions of 2018 PEA

CORICANCHA | 100% OWNED | LIMA, PERU

Permitted & operational existing processing plant and gold bio-leaching facility MINE TYPE Underground Mining method Cut and fill

  • Avg. annual production1

3.1 M Ag eq oz PROCESSING TYPE Base Metal Sulfide Flotation Products Lead, zinc and copper concentrates Ore tonnes processed (LOM) 1 608 kt LOM avg. recoveries (%) 1 Au / Ag 80% Ag 92% Pb 77% Zn 83% Cu 78% Tailings type Dry stack TSF

1 Source: Coricancha PEA, Golder Associates – July 13, 2018 Effective Date

Development project

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Capital Structure

Basic shares outstanding (June 30, 2020) 352,990,253 Market cap (July 10, 2020)

TSX C$296 million NYSE-A US$218

90-day daily average trading volume

TSX 0.5 million NYSE-A 3.2 million

52-week trading range

TSX C$0.32-C$1.28 NYSE-A US$0.23-US$0.98

Cash (March 31, 2020) US$39M

Analyst Coverage

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Appendix

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Consolidated Mineral Reserves Estimates

Property Tonnage (000t) Grade (Au g/t) Contained Metal (000 oz Au) TUCANO PROVEN Open Pit 1,212 1.79 70 Underground 189 3.78 23 Surface Stockpiles 2,446 0.71 56 TUCANO PROBABLE Open Pit 3,297 2.20 233 Underground 1,976 4.17 265 Surface Stockpiles

  • TUCANO PROVEN & PROBABLE

Open Pit 4,509 2.09 302 Underground 2,164 4.13 288 Surface Stockpiles 2,446 0.71 56 Total P&P 9,119 2.20 646

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Property Tonnage (000t) Grade (Au g/t) Contained Metal (000 oz Au) Grade (Ag g/t) Contained Metal (000 oz Ag) Grade (Pb %) Contained Metal (000 lbs Pb) Grade (Zn %) Contained Metal (000 lbs Zn) Grade (Cu %) Contained Metal (000 lbs Cu) Grade (Aueq g/t) Contained Metal (000 oz Aueq) MEASURED Tucano 5,562 0.97 174

  • 0.97

174 Topia 311 1.36 14 474 4,733 4.02 27,527 4.20 28,760

  • 12.42

124 San Ignacio 315 3.06 31 156 1,575

  • 5.01

51 Guanajuato 256 1.72 14 206 1,694

  • 4.28

35 Coricancha 404 5.90 77 210 2,729 2.16 19,248 3.43 30,565 0.54 4,812 13.56 176 El Horcon

  • Total Measured

6,848 309 10,731 46,775 59,325 4,812 2.54 560 INDICATED Tucano 7,920 3.09 786

  • 3.09

786 Topia 165 1.34 7 436 2,317 3.57 13,010 3.79 13,812

  • 11.41

61 San Ignacio 72 2.87 7 173 398

  • 5.04

12 Guanajuato 87 1.62 5 199 561

  • 4.11

12 Coricancha 349 5.60 63 189 2,118 1.95 14,984 3.05 23,437 0.52 3,996 12.49 140 El Horcon

  • Total Indicated

8,593 867 5,394 27,994 37,249

  • 3,996

3.66 1,010 MEASURED & INDICATED Tucano 13,482 2.22 960

  • 2.22

960 Topia 476 1.35 21 461 7,054 3.87 40,603 4.06 42,597

  • 12.07

185 San Ignacio 386 3.03 38 159 1,973

  • 5.01

62 Guanajuato 344 1.69 19 204 2,254

  • 4.24

47 Coricancha 753 5.80 140 200 4,840 2.07 34,353 3.26 54,101 0.53 8,796 13.06 316 El Horcon

  • Total M&I

15,441 1,177 16,121 74,956 96,698 8,796 3.17 1,570 INFERRED Tucano 11,664 2.16 812

  • 2.16

812 Topia 400 1.34 17 434 5,587 2.86 25,246 2.97 26,217

  • 10.89

134 San Ignacio 502 2.69 43 149 2,405

  • 4.76

73 Guanajuato 209 2.32 16 168 1,129

  • 4.63

30 Coricancha 943 5.00 152 209 6,338 1.45 30,150 3.25 67,578 0.64 13,308 12.21 371 El Horcon 162 3.44 18 76 396 2.69 9,616 3.79 13,548

  • 5.25

26 Total Inferred 13,880 1,058 15,856 65,012 107,342 13,308 3.26 1,446

Consolidated Mineral Resources Estimates

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Notes to Reserves & Resources Tables

  • Full NI 43-101 disclosure of Mineral Resource Estimates can be found in Great Panther’s Annual Information Form for the year ended December 31, 2018, available
  • n SEDAR. The Technical Reports cited in this presentation can be found on SEDAR at www.sedar.com and on the Company’s website at

www.greatpanther.com/operations/resources/reports/

  • Technical Report on the 2019 Mineral Reserves and Mineral Resources of the Tucano Gold Mine, Amapa State, Brazil: RPA, dated March 25, 2020, effective date

September 30, 2019. Reno Pressacco, P. Geo., Goran Andric, P. Eng., and Jason Cox, P. Eng., all of RPA, and all of whom are independent Qualified Persons as defined by National Instrument 43-101 were the Qualified Persons for the mineral update for Tucano.

  • Mineral Resources are inclusive of Mineral Reserves.
  • NI43-101 Report on the Topia Mine Mineral Resource Estimates as of July 31st, 2018. GPR internal report dated February 28, 2018 with an effective date of July 31,
  • 2018. Robert F. Brown, P. Eng. is designated as the Qualified Person under NI 43-101.
  • NI43-101 Mineral Resource Update Technical Report on the Guanajuato Mine Complex, San Ignacio Mine, Guanajuato State, Mexico. GPR internal report dated

March 17th, 2020 with an effective date of July 31, 2019. Robert F. Brown, P.Eng., and Mohammad Nourpour, P.Geo were the Qualified Persons for the mineral resource update under NI 43-101.

  • NI43-101 Mineral Resource Update Technical Report on the Guanajuato Mine Complex, Guanajuato Mine, Guanajuato State, Mexico. GPR internal report dated

March 27th, 2020 with an effective date of October 31, 2019. Robert F. Brown, P.Eng., and Mohammad Nourpour, P.Geo were the Qualified Persons for the mineral resource update under NI 43-101.

  • NI43-101 Resource Update Report on the Coricancha Mine Complex, Huarochiri Provence, Lima Region, Peru: Golder Associates, dated February 2nd, 2018 with an

effective date of December 20th, 2017. Ronald Turner, MAusIMM CP(Geo); Daniel Saint Don, P. Eng.; and Jeffrey Woods, P.E. were the Qualified Persons.

  • El Horcon project mineral resource taken from NI43-101 Technical Report on the Guanajuato Mine Complex Claims and Mineral Resource Estimates for the

Guanajuato Mine, San Ignacio Mine, and the El Horcon and Santa Rosa Projects. GPR internal report dated February 20th, 2017 with an effective date of August 31,

  • 2016. Robert F. Brown, P.Eng was the Qualified Persons for the mineral resource update under NI 43-101.
  • The El Horcon Aueq grade and contained Aueq ounces contained metal does not include Zn metal in the calculation.
  • Metal prices, and Au:Ag ratio differ for the above reports but were respected in the calculation of Aueq grades and Aueq Contained ounces for the Topia,

Guanajuato, San Ignacio, Coricancha, and El Horcon mineral resource estimates.

  • Detailed notes for each reserve and resource estimation found in the respective reports, as well on the Great Panther Mining Ltd website, press Operations tab and

under "Reserves and Resources".

  • Summary of Reserves and Resources compiled by R.F. Brown, P. Eng., and QP for Great Panther Mining Ltd.
  • New mineral resources are scheduled for the third quarter 2020 at GMC (Guanajuato and San Ignacio mines), as well as Topia in the first quarter 2021.
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Notes to Reserves & Resources Tables

Tucano

Notes for Tucano Mineral Reserves 1. CIM (2014) definitions were followed for Mineral Reserves. 2. Open pit Mineral Reserves are estimated within designed pits above marginal cut-off grades that vary from 0.51 g/t Au to 0.62 g/t Au for oxide ore and 0.65 g/t Au to 0.72 g/t Au for sulphide ore. The cut-off grades are derived based on a gold price of US$1,250/oz Au and operating costs sourced from the current

  • perations and mining contracts at an US$/R$ exchange rate of 3.8:1.

3. Mineral Reserves incorporate estimates of dilution and mineral losses. 4. Underground Mineral Reserves were estimated using an incremental cut-off grade of 2.4 g/t Au. 5. A minimum mining width of 20 m was used for open pit Mineral Reserves and 3 m was used for underground Mineral Reserves. 6. The Mineral Reserve estimate includes stockpile inventory. 7. Average metallurgical process recovery: 93%. 8. Bulk density is 2.19 t/m3. 9. Numbers may not add due to rounding Notes for Tucano Mineral Resources 1. CIM (2014) definitions were followed for Mineral Resources. 2. Mineral Resources are estimated at various cut-off grades depending on mining method and mineralization style. 3. Mineral Resources are estimated using a long-term gold price of US$1,500/oz Au, and a US$/Brazilian real (R$) exchange rate of 3.8. 4. A minimum mining width of 3 m was used for preparation of mineralization wireframes for the Urucum open pit and Taperebá AB (Tap AB) open pit and underground Mineral Resources. 5. Mineral Resources are inclusive of Mineral Reserves. 6. Mineral Resource statements are prepared using constraining surfaces and volumes for open pit and underground Mineral Resources, respectively. 7. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. 8. Numbers may not add due to rounding.

Guanajuato Mine Complex

Notes for San Ignacio Mineral Resource Estimate: 1. Ven Bulk Density of 2.64t/m³. 2. Measured, Indicated and Inferred Mineral Resources are reported at a full cost cut-off Net Smelter Return (NSR) of US$100/tonne. 3. Totals may not agree due to rounding. 4. Grades in metric units and contained silver and gold in troy ounces. 5. Minimum true width 0.5m. 6. Mineral Resources are estimated using metal prices of US$15.80/oz Ag and US$1,290/oz Au (based on 3 year back averages); and metallurgical recoveries of 88% Ag, 87% Au. 7. 2019 Mineral Resources Ag Eq oz were calculated using 80:1 Ag:Au ratio. The ratios are reflective of average metal prices for 2019. Notes for Guanajuato Mineral Resource Estimate: 1. Cut-offs are based on the marginal operating costs per mining area being US$113/tonne for Cata, US$75/tonne for Santa Margarita / San Cayetano, US$77/tonne for Los Pozos, US$124/tonne for Guanajuatito, US$60/tonne for Promontorio, and US$197/tonne for Valenciana. 2. Block model grades converted to US$/t value using process plant recoveries of 88% Ag, 87% Au, and net smelter terms negotiated for pyrite concentrates. 3. Rock Density for all veins is 2.68t/m³. 4. Totals may not agree due to rounding. 5. Grades in metric units. 6. Contained silver and gold in troy ounces. 7. Minimum true width 1.0m. 8. Ag:Au ratio of 80:1 was used for Ag eq (oz) Notes for El Horcón Mineral Resource Estimate: 1. US$110 per tonne Cut-off, considering plant recoveries of %Ag, %Au, %Pb, and net smelter terms typical for Pb concentrates. 2. Rock Density for all veins for Diamantillo is 2.77t/m³, San Guillermo 2.78t/m³, Diamantillo HW is 2.62t/m³, Natividad 2.57t/m³. 3. Totals may not agree due to rounding. 4. Grades in metric units. 5. Contained silver and gold in troy ounces. 6. Minimum true width 1.5m 7. Metal Prices US$18.00/oz silver, US$1,300/oz gold, and US$0.80/lb lead. 8. Silver equivalent calculations for El Horcón include gold and lead content but not zinc, as the zinc would not be recovered in the Guanajuato plant. 9. Report effective date of August 31, 2016.

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Notes to Reserves & Resources Tables

Topia

Notes for Topia Mineral Resource Estimate: 1. 2018 Mineral Resource Ag eq oz were calculated using 80:1 Ag:Au ratio, and ratios of 1:0.0636 and 1:0.0818 for the price/ounce of silver to price/pound of lead and zinc, respectively. The ratios are reflective of average metal prices for 2018. 2. CIM Definitions were followed for Mineral Resources. 3. Area-Specific vein bulk densities as follows: Argentina - 3.06t/m3; 1522 - 3.26t/m3; Durangueno - 3.12t/m3; El Rosario - 3.00t/m3; Hormiguera - 2.56t/m3; La Prieta - 2.85t/m3; Recompensa - 3.30t/m3; Animas - 3.02t/m3; San Miguel - 2.56t/m3. 4. Measured, Indicated, and Inferred Mineral Resources are reported at a cut-off Net Smelter Return (NSR) as follows: 1522 Mine US$193/t, Argentina Mine US$172/t, Durangueno Mine US$144/t, Recompensa Mine US$151/t, Hormiguera Mine US$152/t, El Rosario Mine US$173/t, La Prieta US$235/t, Animas US$149/t, and San Miguel US$248/t. 5. Totals may not agree due to rounding. 6. A minimum mining width of 0.30 metres was used. 7. Mineral Resources are estimated using metal prices of US$1,225/oz Au, US$15.50/oz Ag, US$1.00/lb Pb, and US$1.15/lb Zn; and metallurgical recoveries of 94% for Ag, 60% for Au, 94% for Pb, and 93% for Zn.

Coricancha

Notes for Coricancha Mineral Resource Estimate: 1. Cut-offs are based on an estimated $140 Net Smelter Return (NSR)/tonne. 2. Metal prices used to calculate NSR: $1,300 per ounce (oz) Au, $17/oz Ag, $1.15 per pound (lb) Pb, $1.50/lb Zn, $3.00/lb Cu 3. Block model grades converted to United States Dollar (US$) value using plant recoveries of 92.1% Ag, 80.2% Au, 77.3% Pb, 82.6% Zn, 52.7% Cu. 4. Rock Density for Constancia: 3.3 tonnes per cubic meter (t/m³), Wellington, Constancia East, Escondida, San Jose: 3.2 t/m Colquipallana: 2.9 t/m³. 5. Totals may not agree due to rounding. 6. Grades in metric units. 7. All currencies US dollars. 8. Ag equivalent ounces (eq oz) million (M) is calculated from gpt data 9. AgEq g/t = Ag g/t + (Pb grade x ((Pb price per lb/Ag price per oz) x 0.0685714 lbs per Troy Ounce x 10000 g per %)) +(Zn grade x ((Zn price per lb/Ag price per oz) x 0.0685714 lbs per Troy Ounce x 10000 g per %)) + (Cu grade x ((Cu price per lb/Ag price per oz) x 0.0685714 lbs per Troy Ounce x 10000 g per %)) + (Au grade x (Au price per oz/Ag price per oz)).

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