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GMIN.TO ·

G Mining Ventures Reports Strong Q3 2025 Results

Financials

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G Mining Ventures Reports Strong Q3 2025 Results

BROSSARD, QC, November 12 , 202 5 – G Mining Ventures Corp. (“GMIN” or the “ Corporation”)

(TSX:GMIN, OTCQX:GMINF) is pleased to report its financial and operational (1) results for the three and

nine months ended September 30, 2025. Unless otherwise stated, all dollar amounts are in U.S. dollars.

“The third quarter marked a defining period for GMIN,” said Louis -Pierre Gignac, President and Chief

Executive Officer. “Tocantinzinho is now operating at steady state—delivering record production, free cash

flow, and margins that position us among the lowest -cost producers in the Americas. With the Oko West

permits, financing, and formal construction decision now secured, w e are entering the next phase of

disciplined, self-funded growth—demonstrating the strength of our operating team and the consistency of

our execution model. As we transition to a multi -asset producer with Oko West under construction and

Gurupi advancing through permitting and exploration, our focus remains on building long -life, low -cost

operations that generate sustainable returns and long -term value for our shareholders. Our ability to

advance growth responsibly —while maintaining strong safety, environmental, and community

performance—remains central to how we build long-term value.”

Third Quarter and Year-to-date (“YTD”) 2025 Operational and Financial Highlights

o Gold production was 46,360 ounces (“oz”) (YTD – 124,525 ounces), representing a 9% increase

over Q2 2025, reflecting continued strong throughput and recoveries at Tocantinzinho Gold Mine

(“TZ”).

o Robust financial results: Revenues of $161.7 million (YTD - $389.3 million) supported by record

average realized gold price(2) of $3,292 per ounce (YTD - $3,124 per ounce).

o Record free cash flow (2): Generated $ 95.8 million in free cash flow (YTD – $ 190.7 million),

representing a 59% increase from Q2 2025.

o Strong Earnings before Interest, Taxes, Depreciation and Amortization (“EBITDA”)(2): Generated

adjusted EBITDA(2) of $122.6 million (YTD – $283.6 million), a 32% increase from Q2 2025.

o Strong quarterly net income : Reported net income of $ 123.8 million (YTD - $196.8 million), or

$0.55 per share (YTD - $0.87 per share).

o Low-cost operations: Reported all-in sustaining cost (2) (“AISC”) per ounce of gold sold of $1,046 in

Q3 2025 (YTD - $1,121 per ounce), compared to an average gold price received (2)(4) of $3,114 per

ounce (YTD - $2,916 per ounce) , implying a robust AISC margin (2) of $2,068 per ounce (YTD –

$1,795 per ounce).

o Oko West Gold Project (“Oko West”) capital advancing: Invested $93 million in project capital in

Q3 (YTD – $156 million), with full construction now underway.

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Recent Corporate Highlights

Strategic initiatives during the quarter further strengthened GMIN’s balance sheet, advanced construction

readiness at Oko West, and positioned the Corporation for multi-asset growth:

o Advanced Oko West to full construction readiness : Received the Final Environmental Permit on

September 2, 2025, completing all major approvals ahead of development.

o Secured project financing and launched construction: Closed a financing package of up to $387.5

million, with the potential to be increased by an additional $150M beginning six months after

closing, subject to lender approval , and announced the formal construction decision on October

23, 2025.

o Enhanced long-term profitability at TZ : Obtained Superintendência do Desenvolvimento da

Amazônia ("SUDAM") tax-incentive approval, lowering the Brazilian nominal corporate income tax

rate from 34% to approximately 15.25% for a period of 10 years from fiscal year 2025.

o Deferred consideration paid: $60M paid to Eldorado Gold related to the acquisition of TZ.

o De-risked Gurupi for future growth: Secured a favourable Federal Court ruling removing historical

permitting constraints, allowing advancement of a new environmental -licensing process.

Table 1: TZ Operational Results (1)

Q3 2025 Q3 2024 YTD 2025 YTD 2024

In thousands of $, except as otherwise noted

Mining Activities

Ore Tonnes Mined kt 1,787 1,841 4,948 4,242

Waste Tonnes Mined kt 3,275 2,851 8,177 5,783

Total Tonnes Mined kt 5,062 4,692 13,125 10,025

Strip Ratio Waste/ore 1.83 1.55 1.65 1.36

Average Gold Grade of Ore Mined g/t Au 1.18 0.98 1.18 0.96

Processing Activities

Total Tonnes Processed kt 1,094 716 3,009 745

Average Plant Throughput tpd 11,890 7,784 11,021 7,097

Average Gold Recovery % 92.3% 84.5% 90.2% 84.1%

Average Gold Grade of Ore Processed g/t Au 1.43 1.20 1.43 1.16

Gold Produced oz 46,360 23,252 124,525 23,419

Gold Sold oz 49,119 17,144 124,636 17,144

Unit Costs

Average Realized Gold Price (2) $/oz 3,292 2,508 3,124 2,508

Average Gold Price Received (2) (4) $/oz 3,114 2,397 2,916 2,397

Total Cash Costs (2) $/oz 721 879 726 879

Site-Level AISC (2) $/oz 971 1,069 1,021 1,069

AISC (2) $/oz 1,046 1,226 1,121 1,226

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Table 2: Financial Results (1)

Q3 2025 Q3 2024 YTD 2025 YTD 2024

In thousands of $, except as otherwise noted

Revenue $ 161,718 42,997 389,330 42,997

Cost of Goods Sold $ (45,879) (18,350) (128,329) (18,350)

Net Income $ 123,789 24,307 196,844 14,408

Per Share – Basic $/share 0.55 0.12 0.87 0.10

Adjusted Net Income (2) $ 114,124 17,131 185,601 13,130

Per share – Basic $/share 0.50 0.09 0.82 0.09

EBITDA (2) $ 124,478 25,881 295,449 16,061

Adjusted EBITDA (2) $ 122,566 25,679 283,552 21,757

Cash Provided by (Used by) Operating

Activities $ 101,949 1,660 211,574 (14,909)

Per share – Basic $/share 0.45 0.01 0.94 (0.10)

Free Cash Flow (2) $ 95,838 (1,468) 190,722 (18,037)

Per share – Basic $/share 0.42 (0.01) 0.84 (0.13)

Financial Highlights

Gold sales totaled 49,119 ounces, generating record quarterly revenue of $161.7 million (YTD $389.3

million) at an average realized gold price of $3, 292 per ounce, reflecting both higher production and

favorable metal prices. Amid a supportive commodity price environment and ongoing cost discipline across

the industry, GMIN continued to translate operational momentum into strong cash flow and profitability.

Operating costs remained well managed for the quarter, with total cash costs of $721 per ounce sold, site -

level AISC of $971 per ounce, and consolidated AISC of $1,046 per ounce, resulting in industry -leading

margins. Cost of goods sold totaled $45.9 million. For the nine months ended September 30, total cash costs

averaged $726 per ounce, with site-level AISC of $1,021 per ounce and consolidated AISC of $1,121 per

ounce.

Cash flow generation remained robust for the quarter, with $ 101.9 million in net cash from operating

activities ($107.3 million before changes in working capital). On a year -to-date basis, operations generated

$211.6 million in operating cash flow and $218.3 million before working capital movements, driven by strong

margins and disciplined capital allocation.

The Corporation delivered record profitability, generating adjusted EBITDA of $122.6 million (EBITDA of

$124.5 million) for the quarter and adjusted net income of $114.1 million, or $0.50 per share, up sharply

from Q2 2025. Year -to-date, adjusted EBITDA reached $283. 6 million and adjusted net income $185.6

million ($0.82 per share), reflecting the sustained ramp-up and stable performance of TZ.

GMIN ended the quarter with $94.6 million in cash and equivalents, down from $156.1 million in Q2, as

strong free cash flow generation at TZ was offset by the $60 million deferred payment to Eldorado Gold,

investments in Oko West, sustaining capital, exploration and working capital movements.

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Table 3: Reconciliation of Cash Costs and AISC (2)

Q3 2025 Q3 2024 YTD 2025 YTD 2024

In thousands of $, except as otherwise noted

Operating Expenses $ 30,354 14,371 78,269 14,371

Royalties $ 5,071 707 12,167 707

Total Cash Costs $ 35,425 15,078 90,436 15,078

Sustaining Capital and others* $ 12,254 3,251 36,793 3,251

Site Level AISC (2) $ 47,679 18,329 127,230 18,329

G&A Expenses (3) $ 3,705 2,696 12,535 2,696

T otal AISC (2) $ 51,383 21,025 139,764 21,025

Costs per oz:

Cash Costs (2) $/oz 721 879 726 879

Site Level AISC (2) $/oz 971 1,069 1,021 1,069

AISC (2) $/oz 1,046 1,226 1,121 1,226

*Comprised of Sustaining capital expenditures, capitalized stripping (sustaining), exploration (sustaining) and accretion to rehabilitation provision (ARO).

TZ Operational Summary

TZ sustained strong operational momentum in the third quarter, marking a second consecutive record

period. Throughput averaged 92% of nameplate capacity, up from 86% in Q2, supported by greater plant

availability and steady metallurgical recoveries. The expert control system, implemented earlier in the year,

is now fully embedded in daily operations, improving plant stability and consistency of output.

Mining productivity increased following the commissioning of additional mobile equipment, providing

greater operational flexibility. Period sequencing delivered an average processed grade of 1.43 g/t of gold,

and access to higher-grade Phase 2 benches is anticipated to further strengthen performance in the fourth

quarter.

Costs remained well controlled, with cash costs of $721/oz and AISC of $1,046/oz, driving robust margins

and free cash flow generation. Safety performance remained strong, with one lost -time incident during the

quarter and a TRIFR of 0.11 year-to-date. Approximately 82% of the workforce is from Pará State and 15%

are women, underscoring GMIN’s commitment to local employment and inclusion. During the third quarter,

TZ was approved for inclusion in the SUDAM regional tax incentive program, reducing its nominal corporate

income tax rate to approximately 15.25% for a ten-year period, further enhancing after-tax cash flow.

Oko West Gold Project – From Permit to Build

Subsequent to the quarter , the Oko West Gold Project achieved a key milestone, transitioning from

permitting to full construction. With the Final Environmental Permit received, the project is now fully

authorized for development and operations. The Board approved the formal constr uction decision on

October 23, 2025, following the completion of a $350 million r evolving credit facility, expandable to $500

million.

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Engineering and procurement progressed materially, with 36% of detailed engineering completed and $334

million committed, locking in pricing and delivery schedules for major long-lead items. Early works advanced

on schedule, including operational site acce ss roads, well -progressed permanent camp facilities, mass

excavation and concrete foundations for key process and infrastructure areas. Delivery of the first mining

shovel enabled the start of self-performed excavation, while additional mine trucks and a second shovel are

expected to arrive ahead of schedule in Q4 2025. Major civil works for the power plant and grinding area

are set to commence before year-end.

Local participation continues to grow, with more than 80% of the workforce comprising Guyanese nationals

and over 590,000 hours worked to date with a TRIFR of 0.33. Oko West remains on schedule and budget,

positioned as GMIN’s next long-life cornerstone asset.

Gurupi – Permitting Re-start and Targeting

Gurupi advanced meaningfully during the third quarter following a favourable Federal Court ruling in July

2025, which removed legacy permitting constraints and confirmed GMIN’s right to restart environmental

licensing under its current ownership. This decision provides full regulatory clarity for advancing Gurupi in

accordance with modern Brazilian environmental standards.

Since the ruling, GMIN has initiated preparation of a new Environmental Impact Assessment (EIA), restarted

baseline environmental and social studies, and re -engaged with local stakeholders and federal agencies to

align on the renewed licensing framework. F ieldwork and early -stage exploration also resumed, with

trenching and soil sampling confirming extensions of mineralization up to two kilometres north of the Chega

Tudo deposit, highlighting the broader district potential.

An initial $6–8 million exploration program is now underway, including roughly 18,500 metres of diamond

and reverse -circulation drilling targeting both near- mine extensions and new regional prospects. With

permitting re-established and drilling mobilizing, Gurupi is positioned to become GMIN’s third long -term

growth platform, offering meaningful optionality and future production potential within a well -established

Brazilian mining jurisdiction.

Environment Social Governance (“ESG”) Highlights

Operational discipline and ESG execution continued to move in step. At TZ, high water recycling and waste-

reuse rates were maintained as the plant stabilized, and the operation sustained low incident frequency.

Workforce composition remained a differentiat or—high local participation in Pará state and a growing

representation of women—while broader commitments set out in the 2024 ESG Report are being rolled out

across sites. The quarter’s operational reliability and Health Safety Environment ( HSE) outcomes reinforce

the culture GMIN is scaling to Oko West and Gurupi.

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Liquidity and Capital Resources

GMIN ended Q3 2025 with $94.6 million in cash and equivalents and total liquidity of $471.6 million,

providing ample flexibility to fund Oko West construction and ongoing exploration.

The $61.5 million decrease in cash from Q2 reflects the $60 million deferred payment to Eldorado Gold,

$82 million invested in Oko West, and working capital movements — partially offset by strong free cash flow

generation.

Figure 1: Cash Position Bridge for the three-month period ended September 30, 2025

2025 Outlook

GMIN reaffirms its 2025 production guidance of 175,000– 200,000 ounces of gold, with AISC expected to

remain within the $1,025 –$1,155 per ounce range. With T Z operating at full capacity and Oko West

construction advancing on schedule, the Corporation remains on track to deliver a year of strong free cash

flow and to solidify its position as a multi- asset, mid-tier gold producer. Supported by a robust gold price

environment and disciplined cost management across the portfolio, GMIN is well positioned to susta in

strong cash generation and fund its next phase of growth.

At TZ, production remains weighted to the second half of the year, consistent with mine sequencing and in

line with full-year guidance as higher-grade zones become accessible in late 2025. Sustaining capital for the

year is forecast within the previously g uided $60–$70 million range. At Oko West, development spending

of $200– $240 million remains on budget, funded primarily through a combination of cash on hand and

operating cash flow.

Exploration across Oko West and Gurupi continues within plan, with drilling at Gurupi scheduled to begin

in Q4. Entering the final quarter, GMIN’s strong balance sheet and two fully permitted growth assets position

it for continued self-funded growth and long-term value creation, advancing toward its goal of becoming a

leading mid-tier gold producer.

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Table 4: Guidance

2025 Operational & Cost Guidance

TZ Mine

Gold Production k oz 175 to 200

Cash Costs $/oz Au sold $620 to $685

AISC(2) $/oz Au sold $1,025 to $1,155

Sustaining Capital Expenditures

Sustaining $M $35 to $45

Near-mine exploration $M $2

Capitalized Waste Stripping $M $23

Total Sustaining $M $60 to $70

Non-Sustaining Capital Expenditures

TZ Regional Exploration $M $9

Oko West Exploration $M $8

Oko West Project $M $200 to $240

Gurupi $M $6 to $8

Total Non-Sustaining $M $223 to $265

Note: Guidance assumes a realized gold price of $2,350 and BRL/USD of 5.25

2025 Catalysts

In the fourth quarter of 2025, the Corporation expects to:

o Advance detailed engineering and continue early works activities at Oko West

o Continue environmental permitting activities at Gurupi

o Launch a 10 -kilometre drill program at Gurupi, following recent permitting advances and

preparatory work completed in Q3

o Progress exploration initiatives-both greenfield and brownfield-across TZ, Oko West and Gurupi

Third Quarter 2025 Results Conference Call and Webcast

A conference call to discuss details of GMIN’s third quarter 2025 results will be held by senior management

on Thursday, November 13 , 2025, at 9:00 AM (ET). Participants may join the conference call using the

following call-in details:

o Conference ID: 4699534

o Participant Toll-Free Dial-In Number: 1-800-715-9871

o Participant International Dial-In Number: 1-646-307-1963

Participants can also access a live webcast of the conference call via https://edge.media-

server.com/mmc/p/iggxitpp or via the GMIN website at: https://gmin.gold/investors/presentations-and-

events/

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A replay of this conference call will be available via the webcast for 12 months . Replay details will be

provided on the GMIN website 24 hours after the call at:

https://gmin.gold/investors/presentations-and-events/.

Qualified Person

Louis-Pierre Gignac, President & Chief Executive Officer of GMIN, a QP as defined in NI 43 -101, has

reviewed the press release on behalf of the Corporation and has approved the technical disclosure contained

in this press release.

About G Mining Ventures Corp.

G Mining Ventures Corp. is a min ing company engaged in the acquisition, exploration and development of

precious metal projects to capitalize on the value uplift from successful mine development. GMIN is well -

positioned to grow into the next mid -tier precious metals producer by leveraging strong access to capital

and proven development expertise. GMIN is currently anchored by the Tocantinzinho Mine in Brazil ,

supported by the Gurupi Project in Brazil and the Oko West Project in Guyana — all with significant

exploration upside and located in mining-friendly jurisdictions. GMIN trades on the TSX under the symbol

“GMIN”.

Additional Information

For further information on GMIN, please visit the website at www.gmin.gold or contact:

Jean-François Lemonde

Vice President, Investor Relations

514.299.4926

[email protected]

Cautionary Statement on Forward-Looking Information

All statements, other than statements of historical fact, contained in this press release constitute “forward-looking

information” and “forward -looking statements” within the meaning of certain securities laws and are based on

expectations and projections as of the date of this press release. Forward -looking statements contained in this

press release include, without limitation, those related to (i) full construction being underway at Oko West; (ii) the

Corporation having received the green light to advance th e Gurupi project and restart the licensing process ,

thereby de-risking that project; (iii) exploration at Oko West and Gurupi demonstrating upside for low-risk organic

growth; (iv) deliveries and works at Oko West (e.g., mining shovel, blasting, concrete plant, civil works) commencing

and unfolding on schedule; (v) the implementation of broader sustainability commitments across all sites ; (vi) the

quoted comments and expectations of GMIN’s President & Chief Executive Officer; and ( vii) more generally, the

sections entitled “2025 Outlook” (notably the table setting forth the Corporation’s operational & cost guidance),

“2025 Catalysts” and “About G Mining Ventures Corp.”.

Forward-looking statements are based on expectations, estimates and projections as of the time of this press

release. Forward-looking statements are necessarily based upon several estimates and assumptions that, while

considered reasonable by the Corporation as of the time of such statements, are inherently subject to significant

business, economic and competitive uncertainties and contingencies. These estimates and assumptions may prove