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Alamos Gold Reports Second Quarter 2025 Results Stronger production and lower costs drive record cash flow from operations and solid free cash flow of $85 million while funding growth

Financials

TRADING SYMBOL: TSX:AGI NYSE:AGI

1 | Alamos Gold Inc

Alamos Gold Inc.

Brookfield Place, 181 Bay Street, Suite 3910, P .O. Box #823

Toronto, Ontario M5J 2T3

Telephone: (416) 368-9932 or 1 (866) 788-8801

All amounts are in United States dollars, unless otherwise stated.

Alamos Gold Reports Second Quarter 2025 Results

Stronger production and lower costs drive record cash flow from operations and solid free cash

flow of $85 million while funding growth

Toronto, Ontario (July 30, 2025) - Alamos Gold Inc. (TSX:AGI; NYSE:AGI) (“Alamos” or the “Company”) today

reported its financial results for the quarter ended June 30, 2025.

“Production increased 10% from the first quarter, meeting our quarterly guidance, while all -in sustaining costs

decreased 18%, reflecting stronger performances across all of our operations. This contributed to record cash flow

from operations and a substantial increase in free cash flow to $85 million while continuing to reinvest in growth. We

expect further production growth into the second half of the year driven by a combination of higher grades and

milling rates, and remain on track to achieve full year production guidance. Given external factors related to our

higher share price and gold price, as well as the slower start to the year at Magino and Young -Davidson, we have

increased our annual cost guidance. This is not reflective of our long-term outlook with costs expected to continue to

improve into the second half of the year, and a more substantial decrease expected over the next several years,”

said John A. McCluskey, President and Chief Executive Officer.

“A key contributor to this improvement will be the Island Gold District where we successfully completed the transition

to processing Island Gold ore through the larger and more productive Magino mill mid -July. As outlined in the Base

Case Life of Mine plan issued last month, the Island Gold District will be a driver of our growing production and

declining costs over the next several years. We also believe there is further upside to come. Through a larger

expansion of the district, we see excellent potential to grow our consolidated production to approximately one

million ounces per year, underpinning one of the strongest growth profiles in the sector,” Mr. McCluskey added.

Second Quarter 2025 Operational and Financial Highlights

• Produced 137,200 ounces of gold, consistent with quarterly guidance and a 10% increase from the first

quarter of 2025 reflecting stronger performances from all three operations. With further increases expected

in the third and fourth quarter, the Company remains on track to achieve full year production guidance

• Sold 135,027 ounces of gold at an average realized price of $3,223 per ounce, generating record quarterly

revenues of $438.2 million. The average realized gold price was below the London PM Fix price, reflecting

the delivery of 12,346 ounces into the gold prepayment facility executed in July 2024 based on the prepaid

price of $2,524 per ounce

• Record cash flow from operating activities totaled $199.5 million (including $232.9 million before changes in

working capital and taxes paid 1, or $0.55 per share), a 151% increase from the first quarter of 2025

reflecting the strong operating performance and margin expansion through higher gold prices and lower

costs

• Generated strong free cash flow 1 of $84.6 million, while continuing to reinvest in high -return growth projects

including the Phase 3+ Expansion, Lynn Lake, and PDA. This was a significant increase from negative free

cash flow of $20.1 million in the first quarter of 2025, reflecting a solid contribution from all three operations.

The Company expects strong ongoing free cash flow at current gold prices through the remainder of 2025

with significant growth starting in 2026 reflecting higher production and lower costs

• Total cash costs1 of $1,075 per ounce and all -in sustaining costs ("AISC") 1 of $1,475 per ounce decreased

10% and 18%, respectively, from the first quarter of 2025, driven by stronger production and lower share -

based compensation expense. Costs are expected to decrease further through the second half of the year

TRADING SYMBOL: TSX:AGI NYSE:AGI

2 | Alamos Gold Inc

• Reflecting the higher than budgeted share -based compensation expense through the first half of the year ,

higher royalty expense, and slower start to the year at Magino and Young -Davidson, the Company has

increased its 2025 cost guidance. Full year total cash costs are now expected to be between $9 75 and

$1,025 per ounce, and AISC between $1,400 and $1,4 50 per ounce. This represents a 1 2% increase in

AISC guidance with approximately 40% of the increase attributable to external factors including the

revaluation of previously issued share -based compensation with the higher share price, and higher royalty

expenses given the increased gold price

• Cost of sales of $200.7 million, or $1,486 per ounce, decreased 10% from the first quarter of 2025 on a per-

ounce basis

• Reported net earnings for the quarter were $159.4 million, or $0.38 per share

• Adjusted net earnings1 were $144.1 million, or $0.34 per share. Adjusted net earnings includes adjustments

for unrealized losses on commodity hedge derivatives, net of tax, of $ 17.1 million, adjustments for

unrealized foreign exchange gains recorded within deferred taxes and foreign exchange loss totaling $34.3

million, and other adjustments of $1.9 million

• Cash and cash equivalents increased 19% from the first quarter of 2025 to $344.9 million at June 30, 2025.

The Company remains in a strong net cash position and is well -positioned to internally fund all of its growth

initiatives with strong ongoing free cash flow and $844.9 million of total liquidity

• Returned $21 million to shareholders. This included the repurchase of 0.4 million shares at a cost of $10.0

million ($25.11 per share), and payment of the $10.6 million quarterly dividend ($0.025 per share)

• In response to the devastating wildfires impacting communities across northern Manitoba, Alamos partnered

with two other mining companies, collectively donating CAD$1.25 million to the Canadian Red Cross to

support emergency relief and rebuilding efforts. This contribution will help the residents and Indigenous

communities in which the three companies operate that have been affected by the wildfires. In addition,

Alamos Gold is establishing a $250,000 Wildfire Support Fund, administered by the Dreamcatchers

Committee which will support community rebuilding efforts in the community of Lynn Lake

• Announced the Base Case Life of Mine Plan ("Base Case LOM Plan") completed on the Island Gold

District, outlining a long -life operation that is expected to become one of the largest, lowest -cost, and most

profitable gold mines in Canada. The Base Case LOM Plan outlines average annual gold production of

411,000 ounces starting in 2026, at average mine-site AISC of $915 per ounce over the initial 12 years. The

Company expects to outline significant upside potential to the Base Case LOM within an expansion study

("Expansion Study"), which is expected to be completed in the fourth quarter of 2025

• Provided an exploration update at Island Gold where drilling continues to extend high -grade gold

mineralization across the Island Gold Deposit, as well as within several hanging wall and footwall structures,

highlighting the significant near -mine upside potential. Additionally, the regional exploration program has

been successful in intersecting high -grade gold mineralization at the past -producing Cline -Pick and

Edwards mines, located seven kilometres from the Magino Mill, highlighting longer -term opportunities for

further growth

• Shaft sinking at Island Gold reached 1,265 metres ("m") in the second quarter, or 92% of the planned depth.

In addition, a groundbreaking ceremony was held for the 115 kV power line project in partnership with

Batchewana First Nation. When completed in 2026, it will connect the entire site to grid power, providing

clean energy and further reducing the Island Gold District Greenhouse Gas (“GHG”) emissions intensity to

well below the industry average

• Announced a binding agreement to sell the option to earn 100% interest in the non -core Quartz Mountain

Gold Project (“Quartz Mountain”), located in Oregon, to Q -Gold Resources Ltd. (TSXV:QGR) (“Q -Gold”) for

total consideration of up to $21 million and a 9.9% equity interest in Q -Gold. The transaction is expected to

close in the second half of 2025

(1) Refer to the “Non-GAAP Measures and Additional GAAP Measures” section of this press release and associated MD&A for a description and calculation of these

measures.

TRADING SYMBOL: TSX:AGI NYSE:AGI

3 | Alamos Gold Inc

Highlight Summary

Three Months Ended June 30, Six Months Ended June 30,

2025 2024 2025 2024

Financial Results (in millions)

Operating revenues $438.2 $332.6 $771.2 $610.2

Cost of sales (1) $200.7 $172.6 $395.9 $346.2

Earnings from operations $216.2 $138.8 $310.9 $220.2

Earnings before income taxes $181.6 $128.2 $207.3 $203.8

Net earnings $159.4 $70.1 $174.6 $112.2

Adjusted net earnings (2) $144.1 $96.9 $203.9 $148.1

Adjusted earnings before interest, taxes, depreciation and

amortization (2) $260.2 $180.9 $405.6 $308.1

Cash provided by operating activities before changes in working

capital and taxes paid (2) $232.9 $191.1 $364.3 $326.5

Cash provided by operating activities $199.5 $195.0 $279.1 $304.4

Capital expenditures (sustaining) (2) $33.5 $20.9 $60.3 $47.4

Sustaining finance leases (3) $4.0 $— $8.3 $—

Capital expenditures (growth) (2) $71.6 $58.8 $137.9 $110.4

Capital expenditures (capitalized exploration) $9.8 $7.9 $16.4 $14.3

Free cash flow (2)(3) $84.6 $107.4 $64.5 $132.3

Operating Results

Gold production (ounces) 137,200 139,100 262,200 274,800

Gold sales (ounces) 135,027 140,923 252,610 273,772

Per Ounce Data

Average realized gold price (5) $3,223 $2,336 $3,027 $2,207

Average spot gold price (London PM Fix) $3,280 $2,338 $3,067 $2,208

Cost of sales per ounce of gold sold

(includes amortization) (1) $1,486 $1,225 $1,567 $1,265

Total cash costs per ounce of gold sold (2) $1,075 $830 $1,130 $869

All-in sustaining costs per ounce of gold sold (2) $1,475 $1,096 $1,629 $1,178

Share Data

Earnings per share, basic $0.38 $0.18 $0.42 $0.28

Earnings per share, diluted $0.38 $0.17 $0.41 $0.28

Adjusted earnings per share, basic (2) $0.34 $0.24 $0.48 $0.37

Weighted average common shares outstanding (basic) (000’s) 420,474 398,275 420,445 397,546

Financial Position (in millions)

Cash and cash equivalents (4) $344.9 $327.2

(1) Cost of sales includes mining and processing costs, royalties, and amortization expense.

(2) Refer to the “Non -GAAP Measures and Additional GAAP Measures” section of this press release and associated MD&A for a description and calculation of these

measures.

(3) Sustaining finance leases at Island Gold District are not included as additions to mineral property, plant and equipment in c ash flows used in investing activities.

(4) Cash and cash equivalents in the comparatives reflect the balance as at December 31, 2024.

(5) Average realized gold price for the three and six months ended June 30, 2025 included the delivery of ounces into the gold prepayment facility based on the

prepaid price of $2,524 per ounce.

(6) Comparative prior year period figures do not include the Magino mine, as the acquisition of the Magino mine was completed on July 12, 2024.

TRADING SYMBOL: TSX:AGI NYSE:AGI

4 | Alamos Gold Inc

Three Months Ended June 30, Six Months Ended June 30,

2025 2024 2025 2024

Gold production (ounces)

Island Gold District (7) 64,400 41,700 123,600 75,100

Young-Davidson 38,700 44,000 74,100 84,100

Mulatos District (8) 34,100 53,400 64,500 115,600

Gold sales (ounces)

Island Gold District (7) 63,958 39,766 117,346 73,896

Young-Davidson 38,214 45,057 73,689 84,867

Mulatos District (8) 32,855 56,100 61,575 115,009

Cost of sales (in millions) (1)

Island Gold District (7) $88.3 $30.7 $167.8 $64.1

Young-Davidson $65.2 $66.7 $130.3 $132.1

Mulatos District (8) $47.2 $75.2 $97.8 $150.0

Cost of sales per ounce of gold sold (includes amortization) (1)

Island Gold District (7) $1,381 $772 $1,430 $867

Young-Davidson $1,706 $1,480 $1,768 $1,557

Mulatos District (8) $1,437 $1,340 $1,588 $1,304

Total cash costs per ounce of gold sold (2)

Island Gold District (7) $1,008 $493 $1,035 $591

Young-Davidson $1,233 $1,030 $1,289 $1,104

Mulatos District (8) $1,017 $907 $1,117 $873

Mine-site all-in sustaining costs per ounce of gold sold (2)(3)

Island Gold District (7) $1,410 $805 $1,427 $943

Young-Davidson $1,575 $1,203 $1,614 $1,334

Mulatos District (8) $1,084 $963 $1,194 $933

Capital expenditures (sustaining, growth, and capitalized exploration) (in millions) (2)

Island Gold District (4)(7)(9) $74.4 $56.1 $146.7 $110.7

Young-Davidson (5) $21.4 $19.0 $40.2 $39.2

Mulatos District (6)(8) $3.7 $7.8 $7.7 $11.7

Other $19.4 $4.7 $28.3 $10.5

(1) Cost of sales includes mining and processing costs, royalties, and amortization expense.

(2) Refer to the “Non -GAAP Measures and Additional GAAP Measures” section of this press release and associated MD&A for a description and calculation of these

measures.

(3) For the purposes of calculating mine -site all -in sustaining costs, the Company does not include an allocation of corporate and administrative expense and

corporate share-based compensation expense.

(4) Includes capitalized exploration at Island Gold District of $ 5.1 million and $ 9.0 million for the three and six months ended June 30, 2025 ($3.4 million and $6.9

million for the three and six months ended June 30, 2024 ).

(5) Includes capitalized exploration at Young-Davidson of $2.9 million and $4.9 million for the three and six months ended June 30, 2025 ($1.4 million and $2.4 million

for the three and six months ended June 30, 2024).

(6) Includes capitalized exploration at Mulatos District of $1.8 million and $2.5 million for the three and six months ended June 30, 2025 ($3.1 million and $5.0 million

for the three and six months ended June 30, 2024).

(7) The Island Gold District includes Island Gold and Magino mines for the three and six months ended June 30, 2025 . Comparative prior year period figures do not

include the Magino mine, as the acquisition of the Magino mine was completed on July 12, 2024.

(8) The Mulatos District includes Mulatos and La Yaqui Grande mines.

(9) Sustaining capital expenditures for Island Gold District include certain finance leases classified as sustaining.

TRADING SYMBOL: TSX:AGI NYSE:AGI

5 | Alamos Gold Inc

Environment, Social and Governance Summary Performance

Health and Safety

• Total recordable injury frequency rate 1 ("TRIFR") of 0.65 in the second quarter, a 56% decrease from 1.49

in the first quarter of 2025

• Lost time injury frequency rate1 ("LTIFR") of 0.08 in the second quarter

• Alamos had eight recordable injuries across its sites and one lost time injury

• Year-to-date TRIFR of 1.01 is a significant improvement from the prior year and LTIFR of 0.08

Alamos strives to maintain a safe, healthy working environment for all, with a strong safety culture where everyone

is continually reminded of the importance of keeping themselves and their colleagues healthy and injury -free. The

Company’s overarching commitment is to have all employees and contractors return Home Safe Every Day.

Environment

• Six minor reportable spills occurred in the second quarter

• Continued reclamation activities at Mulatos for the Cerro Pelon, El Victor and San Carlos pits

All six reportable spills were minor, promptly remediated at the time of occurrence, and are not expected to have

any lasting impact on the natural environment.

The Company is committed to preserving the long -term health and viability of the natural environment that

surrounds its operations and projects. This includes investing in new initiatives to reduce the Company's

environmental footprint with the goal of minimizing the impacts of its activities.

Community

Ongoing charitable donations, sponsorships, medical support and infrastructure investments were provided to local

communities, including:

• Alamos, Vale Base Metals, and Hudbay Minerals collectively contributed CAD$1.25 million to the Canadian

Red Cross to support emergency relief and rebuilding efforts for those impacted by the wildfires in Northern

Manitoba

• Committed $250,000 to a Wildfire Support Fund, administered by the Dreamcatchers Committee which will

support community rebuilding efforts in the community of Lynn Lake, Manitoba

• Provided local community support near the Mulatos District including medical services, road maintenance,

water distribution and student scholarships

The Company believes that excellence in sustainability provides a net benefit to all stakeholders. The Company

continues to engage with local communities to understand local challenges and priorities. Ongoing investments in

local infrastructure, health care, education, cultural and community programs remain a focus of the Company.

Governance and Disclosure

• Mulatos was awarded the Empresa Socialmente Responsable award for the 17 th consecutive year in

recognition of the mine’s ethical and sustainable practices

• Published Alamos’ 2024 Report on Conformance to the Responsible Gold Mining Principles ("RGMP") in

accordance with the World Gold Council’s RGMP framework

• Published Alamos’ 2024 Report on Modern Slavery in accordance with Canada’s Fighting Against Forced

Labour and Child Labour in Supply Chains Act

• Published Alamos’ Extractive Sector Transparency Measures Act 2024 Annual Report, outlining payments

made to governments in Canada and abroad related to our activities on a country and project basis

The Company maintains the highest standards of corporate governance to ensure that corporate decision -making

reflects its values, including the Company’s commitment to sustainable development.

(1) Frequency rate is calculated as incidents per 200,000 hours worked.

TRADING SYMBOL: TSX:AGI NYSE:AGI

6 | Alamos Gold Inc

Outlook and Strategy

2025 Guidance (4)

Island Gold

District

Young-

Davidson

Mulatos

District Lynn Lake Total

Gold production (000's ounces) 275 - 300 175 - 190 130 - 140 — 580-630

Cost of sales, including amortization (in millions) (3) $865

Previous cost of sales, including amortization (in millions) (3) $805

Total cash costs ($ per ounce) (1) $875 - $925 $1,150 - $1,200 $925 - $975 — $975 - $1,025

Previous total cash costs ($ per ounce) (1) $725 - $775 $1,075 - $1,125 $925 - $975 — $875 - $925

All-in sustaining costs ($ per ounce) (1)(2) $1,225 - $1,275 $1,550 - $1,600 $1,025 - $1,075 — $1,400 - $1,450

Previous all-in sustaining costs ($ per ounce) (1)(2) $1,100 - $1,150 $1,390 - $1,440 $1,025 - $1,075 — $1,250 - $1,300

Capital expenditures (in millions)

Sustaining capital (1) $80 - $85 $55 - $60 $3 - $5 — $138 - $150

Growth capital (1) $270 - $300 $15 - $20 $37 - $40 $100 - $120 $422 - $480

Total sustaining and growth capital (1) $350 - $385 $70 - $80 $40 - $45 $100 - $120 $560 - $630

Capitalized exploration (1) $20 $9 $6 $4 $39

Total capital expenditures and capitalized exploration (1) $370 - $405 $79 - $89 $46 - $51 $104 - $124 $599 - $699

(1) Refer to the "Non-GAAP Measures and Additional GAAP" section of this press release and associated MD&A for a description of these measures.

(2) Total consolidated all -in sustaining costs include corporate and administrative , and share based compensation expenses. Individual mine -site all -in sustaining

costs do not include an allocation of corporate and administrative expense , and corporate share-based compensation expenses.

(3) Cost of sales includes mining and processing costs, royalties, and amortization expense, and sliver by-product credits, and is calculated based on the mid -point of

total cash costs guidance.

(4) Previous guidance was issued on January 13, 2025. Cost guidance was revised on July 30, 2025. Production and capital guidance remain unchanged.

The Company’s objective is to operate a sustainable business model that supports growing returns to all

stakeholders over the long -term, through growing production, expanding margins, and increasing profitability. This

includes a balanced approach to capital allocation focused on generating strong ongoing free cash flow while re -

investing in high-return internal growth opportunities, and supporting higher returns to shareholders.

During the second quarter, the Company continued to execute on this strategy across a number of fronts.

Production increased 10% to 137,200 ounces, while AISC decreased 18% from the first quarter, reflecting stronger

performances from all three operations. Through higher production, lower costs and the higher realized gold price,

the Company generated record quarterly revenues, cash flow from operations, and a substantial increase in free

cash flow to $84.6 million while continuing to reinvest in high-return growth.

A further increase in production is expected in the third quarter to between 145,000 and 155,000 ounces, with total

cash costs expected to decrease 5% and a slight decrease in AISC from the second quarter, reflecting the timing of

sustaining capital. This is expected to be driven by higher milling rates at Young -Davidson, and the Island Gold

District, and the recovery of higher -grade ore stacked in the latter part of the second quarter at La Yaqui Grande.

Milling rates within the Magino mill continue to improve following the installation of the redesigned liner and bolt

configuration within the SAG mill. Reflecting the improved milling rates, the Island Gold mill was shut down mid -July

with higher-grade underground ore now being processed within the larger and more productive Magino mill.

A more significant increase in production and decrease in costs is expected in the fourth quarter driven by higher

underground mining rates at Island Gold, as well as higher grades at Young -Davidson and La Yaqui Grande. Given

the strong growth expected into the second half of the year, the Company remains on track to achieve full year

production guidance.

Reflecting the higher than budgeted share -based compensation expense through the first half of the year, higher

royalty expenses, and slower start to the year at Magino and Young -Davidson, the Company has increased its 2025

cost guidance. Full year total cash costs are now expected to be between $975 and $1,025 per ounce, and AISC

between $1,400 and $1,450 per ounce. This represents a 1 2% increase in AISC guidance with approximately 40%

of the increase attributable to external factors. This included the revaluation of previously issued share -based

compensation given the significant increase in the share price during the first quarter, and higher royalty expenses

reflecting the higher gold price.

Consistent with the updated cost guidance, the Company expects a substantial decrease in costs into the second

half of the year, driven by significant production growth. This strong trend of growing production and declining costs

is expected to continue over the next several years driven by low -cost growth from the Company's pipeline of high -

return development projects.

TRADING SYMBOL: TSX:AGI NYSE:AGI

7 | Alamos Gold Inc

The Phase 3+ Expansion at Island Gold is expected to be a significant driver of near term production growth and

further decrease in costs in 2026. As outlined in the Base Case LOM Plan for the Island Gold District, the expansion

is expected to transform the operation into one of the largest, lowest -cost, and most profitable gold mines in Canada

with significant upside potential. The shaft sink has advanced to a depth of 1,265 m, 92% of its ultimate planned

depth. The mill expansion, paste plant and powerline project are all advancing well with the overall expansion

expected to be completed in the second half of 2026.

Post completion of the Phase 3+ Expansion, production from the Island Gold District is expected to increase to

average 411,000 ounces per year at mine -site AISC of $915 per ounce over the initial 12 years (refer to the press

release dated June 23, 2025 for more details). This is expected to drive consolidated production to a range of

680,000 to 730,000 ounces in 2027, a 1 7% increase from the mid -point of 2025 guidance, at 18% lower AISC. A

further increase in production and decrease in costs is expected with the startup of production from Lynn Lake. With

average annual production of 176,000 ounces over its first 10 years at first quartile mine -site AISC, Lynn Lake is

expected to increase consolidated production to approximately 900,000 ounces per year.

Given ongoing wildfires that continue to impact communities across northern Manitoba, the ramp up of construction

activities on the Lynn Lake project has been temporarily paused. Assuming the resumption of construction activities

during the third quarter of 2025, the Company expects the completion of the Lynn Lake project in the second half of

2028. This represents an approximate six -month delay from the previous schedule given the loss of the majority of

the summer construction season.

Longer-term, there is excellent potential to increase consolidated production to approximately one million ounces

per year through a further expansion of the Island Gold District. The Expansion Study for the Island Gold District

remains on track to be released in the fourth quarter of 2025 and is expected to demonstrate the significant upside

potential to the Base Case LOM Plan. The Expansion Study is expected to include a larger Mineral Reserve,

through ongoing Mineral Resource conversion, and will evaluate a potential expansion of the mill to between 18,000

and 20,000 tpd, supporting higher underground mining rates from Island Gold, and open pit mining and processing

rates from Magino.

Capital spending in 2025 will be focused on the ramp up of construction activities at Lynn Lake and PDA, as well as

the final full year of spending on the Phase 3+ Expansion. Capital spending is expected to increase modestly into

2026 with lower capital at the Island Gold District offset by the ramp up in spending on Lynn Lake and PDA. In

2027, capital spending is expected to decrease relative to 2026 driven by significantly lower capital at the Island

Gold District, and the completion of construction of PDA. A further decrease in capital is expected after the

completion of construction of Lynn Lake.

The global exploration budget for 2025 is $72 million, a 16% increase from $62 million spent in 2024, and the

largest in the Company's history reflecting broad based exploration success across its assets. The Company

continues to demonstrate its long-term track record of value creation through exploration with 2024 year -end Global

Mineral Reserves (as updated in June 2025) increasing 50% to 16.0 million ounces (312 mt grading 1.59 g/t Au)

compared to the end of 2023. This reflected an initial Mineral Reserve at Burnt Timber and Linkwood, ongoing

exploration success and Mineral Resource conversion at Island Gold, as well as the addition of Magino. Mineral

Reserves have now increased for six consecutive years for a cumulative increase of 65% over that time frame.

The Company remains well positioned to fund its high -return growth projects internally with strong ongoing free

cash flow, $344.9 million of cash and cash equivalents at the end of the second quarter of 2025, and $844.9 million

of total liquidity. At current gold prices, the Company expects to continue generating strong free cash flow while

funding its growth projects, with significant increases following the completion of the Phase 3+ Expansion in 2026,

PDA in 2027, and Lynn Lake in 2028.

TRADING SYMBOL: TSX:AGI NYSE:AGI

8 | Alamos Gold Inc

Second Quarter 2025 Results

Island Gold District Financial and Operational Review

Three Months Ended June 30, Six Months Ended June 30,

2025 2024 2025 2024

Gold production (ounces) 64,400 41,700 123,600 75,100

Gold sales (ounces) 63,958 39,766 117,346 73,896

Financial Review (in millions)

Operating Revenues $210.8 $93.1 $362.8 $164.1

Cost of sales (1) $88.3 $30.7 $167.8 $64.1

Earnings from operations $120.8 $60.4 $192.2 $97.3

Cash provided by operating activities $122.7 $70.8 $209.6 $111.7

Capital expenditures (sustaining) (2) $20.1 $12.2 $35.6 $25.7

Lease payments (sustaining) (2),(5) $4.0 $— $8.3 $—

Capital expenditures (growth) (2) $45.2 $40.5 $93.8 $78.1

Capital expenditures (capitalized exploration) (2) $5.1 $3.4 $9.0 $6.9

Mine-site free cash flow (2),(5) $52.3 $14.7 $71.2 $1.0

Cost of sales, including amortization per ounce of gold sold (1) $1,381 $772 $1,430 $867

Total cash costs per ounce of gold sold (2) $1,008 $493 $1,035 $591

Mine-site all-in sustaining costs per ounce of gold sold (2),(3) $1,410 $805 $1,427 $943

Island Gold Mine

Underground Operations

Tonnes of ore mined 113,182 94,837 223,408 201,574

Tonnes of ore mined per day 1,244 1,042 1,234 1,108

Average grade of gold (4) 11.48 14.14 11.49 12.23

Metres developed 2,122 1,598 4,280 3,375

Mill Operations

Tonnes of ore processed 118,738 92,703 227,804 199,918

Tonnes of ore processed per day 1,305 1,019 1,259 1,098

Average grade of gold (4) 11.44 14.39 11.40 12.38

Contained ounces milled 43,666 42,895 83,504 79,546

Average recovery rate 98% 98% 98% 98%

Magino Mine

Open Pit Operations

Tonnes of ore mined - open pit (7) 1,251,029 — 2,315,899 —

Tonnes of ore mined per day 13,748 — 12,795 —

Total waste mined - open pit (8) 3,893,410 — 7,339,538 —

Total tonnes mined - open pit 5,144,439 — 9,655,437 —

Waste-to-ore ratio (8) 3.11 — 3.17 —

Average grade of gold (4) 0.82 — 0.79 —

Mill Operations

Tonnes of ore processed 765,423 — 1,416,576 —

Tonnes of ore processed per day 8,411 — 7,826 —

Average grade of gold processed (4) 0.94 — 0.90 —

Contained ounces milled 23,082 — 41,002 —

Average recovery rate 95% — 94% —

(1) Cost of sales includes mining and processing costs, royalties, and amortization.

(2) Refer to the “Non -GAAP Measures and Additional GAAP Measures” section of this press release and associated MD&A for a description and calculation of these

measures.

(3) For the purposes of calculating mine -site all -in sustaining costs, the Company does not include an allocation of corporate and administrative expense and

corporate share-based compensation expense.

(4) Grams per tonne of gold.

(5) Mine-site free cash flow does not include lease payments which are classified as cash flows used in financing activities on the co ndensed interim consolidated

financial statements.

(6) Comparative prior year period figures do not include the Magino mine, as the acquisition of the Magino mine was completed on July 12, 2024.

(7) Includes ore stockpiled during the periods.

(8) Total waste mined includes operating waste and capitalized stripping.