Goldquest Mining Corp. · TSXV:GQC
Goldquest Mining — Investor Presentation (September 2026)
34 slides from Goldquest Mining's investor presentation, September 2026
Slide 1: Building the Next Gold-Copper Mine in the Dominican Republic
Building the Next Gold-Copper Mine in the Dominican Republic September 2026
Slide 2: Forward-Looking Statements
FORWARD-LOOKING STATEMENTS This presentation, and the information contained herein, has been provided to you by GoldQuest Mining Corp. (“GoldQuest” or the “Company”) solely for information purposes. While the information contained in this presentation is believed to be accurate, GoldQuest expressly
Slide 3: GoldQuest Today
GOLDQUEST TODAY Well Funded & Strong shareholder | Unlocking the Tireo Belt. ROMERO ADVANCING ▪ High-grade underground Au- Cu project ▪ BFS well advanced across major ▪ 2.265 Moz AuEq Indicated technical workstreams Resource ▪ ESIA in final stages of integration ▪ 1.117 Moz AuEq Probable Reserve ▪
Slide 4: Romero: 2016 PFS Mine Plan Highlights and Economics
ROMERO 2016 PFS MINE PLAN HIGHLIGHTS ▪ 1.117 Moz AuEq Probable Reserves ▪ 2.265 Moz AuEq Indicated Resources ▪ ~5 g/t AuEq PFS head grade ▪ 2,800 tpd underground operation ▪ ~109 koz AuEq/year PFS production 2016 PFS ECONOMICS ▪ US$203M after-tax NPV5% ▪ 28% after-tax IRR ▪ US$595/oz AISC ▪ US$158M
Slide 5: Romero Project: Advancing on All Fronts
ROMERO PROJECT ADVANCING IN ALL FRONTS BFS ESIA EXPLORATION TERRITORIAL & INSTITUTIONAL READINESS Engineering & Economics Environmental Readiness Resource & District Growth Long-term territorial development approach ▪ Updated Romero MRE ▪ Environmental field ▪ High-grade upside completed; mine desig
Slide 6: Romero BFS Update
ROMERO BFS UPDATE ROMERO BFS — ADVANCING TOWARD DEVELOPMENT READINESS Major technical workstreams progressing from definition into design and costing RESOURCE & MINE PLAN Updated Romero MRE completed Mine optimization & portal relocation advanced Romero South MRE advancing METALLURGY & PROCESS Geome
Slide 7: Responding to the Territorial Challenge
ROMERO PROJECT RESPONDING TO THE TERRITORIAL CHALLENGE WHAT HAPPENED WHAT WE LEARNED WHAT IS DIFFERENT NOW May 2026: Government temporarily Technical advancement alone is not A more deliberate sequence to paused Romero activities following sufficient. build the conditions for trust: public concerns.
Slide 8: Building Territorial Viability
ROMERO PROJECT BUILDING TERRITORIAL VIABILITY 3 1 2 33 UNDERSTAND ADDRESS DEMONSTRATE THE TERRITORY THE CONCERNS THROUGH ACTIONS Identity, values, needs and desires. Environmental transparency, Build evidence, relationships and Systematic engagement across water, technical information, confidence ov
Slide 9: Clear Path Forward
ROMERO PROJECT CLEAR PATH FORWARD De-risk the project. Grow the opportunity. Build trust. DE-RISK THE PROJECT ESIA | Mine design | Mine plan | Engineering | CAPEX / OPEX | BFS GROW THE OPPORTUNITY ADVANCE ROMERO Romero | Near-mine targets | Cachimbo | Tireo Belt RESPONSIBLY Building the readiness re
Slide 10: Board of Directors
BOARD OF DIRECTORS Technical & Financial Expertise Frank Balint, Chair - P.Geo • Veteran mining executive >45 years incl. INMET. Florian Siegfried, Director - MBA • CEO of SSI Asset Management, mining investment expert, fund manager, director of PPX Mining. Coille Van Alphen, Director- MBA, CFA • Me
Slide 11: GoldQuest Capital Structure
GOLDQUEST CAPITAL STRUCTURE Strong Support from In-Country Investors Shareholders Share Information TSXV:GQC Retail Dominican Republic Investors Analyst Coverage 27.2% Dominican Republic 25% Shareholders 36% Market Capitalization** ~C$261 M Shares Outstanding (Basic) 384,424,396 Shares Outstanding (
Slide 12: Peer Comparison
PEER COMPARISON EV/Au Eq. M&I Resources (US$/oz) $618 $492 $404 $324 $308 $289 $94 $82 $66 $29 $18 TSXV: GQC | OTCQX: GDQMF Note: Au Eq. based on metals prices as reported in Technical Reports; Share price as of Sep 19, 2026 goldquestcorp.com | 12
Slide 13: The Romero Project: Responsible Mine Design
THE ROMERO PROJECT PFS: Responsible Mine Design to Continue into BFS Minimal Surface Impact ▪ Small surface footprint over underground mine, thus minimal affect on landscape Return Wasterock Underground ▪ 65% of waste rock will be returned underground as backfill No use of Cyanide ▪ A gold/copper co
Slide 14: Exploration: Tireo Belt Concessions
EXPLORATION Tireo Belt Concessions The Romero Project is only part of GoldQuest’s emerging Tireo Mining District Romero Project TSXV: GQC | OTCQX: GDQMF goldquestcorp.com | 14
Slide 15: Project Portfolio
PROJECT PORTFOLIO Strategic Road to Discovery ▪ Reserves: Romero (7 Mt @ 3.72 ppm Au, 4.33 ppm Ag and 0.88% Cu, or 4.9 ppm AuEq – 1.117 MOz) ▪ Resources: Romero and Romero Sur (Total indicated 20.23 Mt @ 3.48 ppm AuEq – 2.265 Moz AuEq, Total Inferred 3 Mt @ 2.47 ppm AuEq – 0.24 Moz AuEq) TSXV: GQC |
Slide 16: Romero: Mineral Reserves Open at Depth
ROMERO Mineral Reserves – Open at Depth ▪ Metallurgical and Geotechnical ▪ Hole LTP-182: Drill hole LTP-182 drilling to support BFS efforts. intersected 10.68 meters grading 2.70 g/t Au and 22.35 g/t Ag from ▪ Additional drilling will be 398.50 meters. allocated to expand Romero resource and testing
Slide 17: Romero: Metallurgical Holes for BFS
ROMERO Metallurgical Holes for BFS ▪ Assays confirm multiple high- ▪ Hole LTP-173: 38.6 m grading 45.01 g/t grade gold-copper intervals within Au, 14.31 g/t Ag and 2.44% Cu, the central Romero deposit. ▪ Incl. 26.85 m grading 63.82 g/t Au, 18.93 g/t Ag and 3.23% Cu. ▪ Metallurgical test work continu
Slide 18: 3D Mag Inversion + IP Chargeability
3D MAG INVERSION + IP CHARGEABILTY Enhancing the value of historical data ▪ 3D Magnetic Inversion model shows high correlation between Magnetic lows and mineralization ▪ Structural pattern clearly showed by different images. ▪ Repetition of anomalies closely related with updated structural interpret
Slide 19: Gap Drilling Plan
GAP DRILLING PLAN • 3 high-priority drillholes planned to test concept. • Approximately 1,500 m to be drilled • Targeting coincident magnetic-low and high-chargeability responses • Guided by historical drilling and >1 g/t Au intercepts TSXV: GQC | OTCQX: GDQMF goldquestcorp.com | 19
Slide 20: Cachimbo: 2026 Drill Plan
CACHIMBO 2026 Drill Plan ⚬ 6 Holes completed (TIR-26-57, TIR-26-58, TIR-26-59, TIR-26-60, TIR-26-61 and TIR-26-62) targeting deep extension of Cachimbo. TIR-26-58 Assays: - 12.26m @ 7.62 g/t AuEq (2.52 g/t Au, 0.94% Cu, 50.72 g/t Ag, 0.26% Pb, 12% Zn) from 64.65m - Incl. 3.59m @ 17.63 g/t AuEq (5.74
Slide 21: Cachimbo
CACHIMBO TIR-26-58 Intercept represents a new high-grade polymetallic structure. Stringer mineralization at depth returned anomalous grades for gold. TSXV: GQC | OTCQX: GDQMF TIR-26-62Confirmed continuity of the newly identified high-grade mineralized level from TIR-26-58. goldquestcorp.com | 21 Ple
Slide 22: Cachimbo: TIR-26-62 Takeaways
CACHIMBO TIR-26-62 Takeaways: • TIR-26-62: follow-up to discovery hole TIR-26-58: • Confirmed continuity of the newly identified high-grade mineralized level from TIR-26-58. • Confirms a gold-silver-copper-zinc-lead VMS level at Cachimbo and opens additional potential along trend, particularly towar
Slide 23: Cachimbo Exploration Potential Expanded
CACHIMBO EXPLORATION POTENTIAL EXPANDED TIR-26-58 & TIR-26-62: Expanding Cachimbo’s Potential • TIR-26-58 identified a new polymetallic structure, approximately 200 m from previously identified mineralization. • TIR-26-62 returned 12.15 m @ 8.60 g/t Au, with 128.2 g/t Ag, 0.77% Cu and 11.21% Zn. • R
Slide 24: Cachimbo: Targeting Our Next Mineral Resource
CACHIMBO Targeting to Our Next Mineral Resource ▪ 2,238 m drilled at Cachimbo. 6 holes completed and one was interrupted before reaching its target. Additional drilling is planned for Cachimbo as well as Greenfield exploration: ▪ Los Ganchos, ▪ Cañada La Vaca, ▪ Los Mineros, ▪ A large, >7.5 km anoma
Slide 25: Our Vision for the Belt
OUR VISION FOR THE BELT 100% Owned 50 km Long Land Position ▪ Deliver value to our investors in Romero by expanding current Mineral Resource base and advancing exploration following the promising Cachimbo discovery (2017). ▪ Potential for high-grade polymetallic mineralization proven in 2026 drillin
Slide 26: Appendix
APPENDIX
Slide 27: GoldQuest Romero Project PFS (2016)
GOLDQUEST ROMERO PROJECT PFS (2016) Romero Mineral Reserve Estimate Mine Reserves Tonnes Au Ag Cu Au Eq⁽¹⁾ (1) Au equivalent metal prices: Au $1,300/oz Cu $2.50/lb Ag $20.00/oz (Cutoff $70 NSR)⁽²⁾ (g/t) (oz) (g/t) (oz) (%) (M lb) (g/t) (oz) (2) Cutoff NSR metal prices: Cu Au $1,250/oz $2.50/lb Ag $1
Slide 28: Exploring the Tireo Belt
EXPLORING THE TIREO BELT +250 km long belt hosting high-grade Au-Cu mineralization Underexplored Belt with +5 Moz Au endowment: ▪ Total endowment of the belt is ~ 5 Moz Au + unknown or unreported endowment in Haiti (former Newmont projects) ▪ Our concessions holds significant potential to develop a
Slide 29: Geological Model of the Tireo Belt
GEOLOGICAL MODEL OF THE TIREO BELT Gold-Rich VMS Clan 167.5 g/t Au at surface Au Zn-Au Au Au Cachimbo Zn-Au Discovery Cu-Au Romero Project Cu-Au Cu-Au Image modified from Dubé, B; Gosselin, P; Mercier- Langevin, P; Hannington, M; Galley, 2007. Mineral deposits of Canada: a synthesis of major deposit
Slide 30: District-Scale Geology
DISTRICT-SCALE GEOLOGY ▪ Our concessions covers all prospective ground (Tireo Fm.) ▪ Structural pattern related with mineralization likely to repeat along NW trend. Romero ▪ Marine volcanics and subsequent deformation with multiple mineralization events. Romero Sur TSXV: GQC | OTCQX: GDQMF Cachimbo
Slide 31: Prospective Areas
PROSPECTIVE AREAS Adding value through carefully assessing historical data ▪ Fuzzy Analysis helps to understand the full-scale potential of the whole corridor between Romero and Agüita Fria East, TSXV: GQC | OTCQX: GDQMF highlighting 10 highly prospective and underexplored áreas. goldquestcorp.com |
Slide 32: Romero Metallogenic Evolution
ROMERO METALLOGENIC EVOLUTION Multi-staged mineralized system TSXV: GQC | OTCQX: GDQMF goldquestcorp.com | 32
Slide 33: Romero Gap Target
ROMERO GAP TARGET New Drill Test Concept: ▪ GAP Target is between Romero and Romero Field Work Done: South: • Drill pads constructed for the GAP ▪ High chargeability anomaly. drilling. ▪ ZTEM low resistivity at depth. • Completed 3 PD-IP lines at Caracol. ▪ 3D Magnetic Inversion anomalies NW • High
Slide 34: Thank You
Contact Information Corporate Head Office Telephone: (809) 385-2260 Luis Santana, CEO (809) 224-0629 lsantana@goldquestcorp.com Deborah Honig, IR Deborah@adcap.ca General Email THANK YOU investorrelations@goldquestcorp.com Share Information For up to date share information, please visit our website
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