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First Mining Gold reports 5.26 g/t over 19.55 m

First Mining Gold reports high-grade 2026 drill results at the Miroir target, extending Duparquet mineralization and initiating an updated resource model.

(Neutral)
(Neutral)
Form Type
6-K

Rhea-AI Filing Summary

First Mining Gold Corp. (FFMGF) reports initial 2026 drilling results from the Miroir target at its Duparquet Gold Project in Quebec, including 5.26 g/t Au over 19.55 m in hole DUP26-093 and 3.43 g/t Au over 28.0 m in hole DUP26-096. The 2026 program, which began in May, targets approximately 15,000 m of drilling focused on exploration and resource advancement opportunities at Duparquet.

Drilling at Miroir has extended the known mineralized strike length from about 150 m in 2025 to approximately 220 m in 2026, with mineralization also extended at depth to the east and west. The latest assays cover about 1,553 m of drilling from 11 holes, and additional results are pending, including final samples from DUP26-096.

First Mining has also started updating the Duparquet Project resource model to incorporate roughly 48,000 m of drilling completed since the current Mineral Resource Estimate effective September 12, 2022. Technical information is prepared under Canadian NI 43-101 standards and may differ from U.S. reporting requirements.

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Filing Explained

The filing qualifies the reported Miroir expansion: its approximately 220 m strike length is based on drilled core intervals, not determined true widths, because the mineralized-zone geometry remains under evaluation.

Highlight intercept DUP26-093 5.26 g/t Au over 19.55 m From 182.0 m to 201.55 m at the Miroir target
Highlight intercept DUP26-096 3.43 g/t Au over 28.0 m From 234.35 m to 262.35 m at the Miroir target
Peak grade in DUP26-093 21.80 g/t Au over 1.0 m Within the broader 19.55 m intercept in DUP26-093
Planned 2026 drilling 15,000 m Targeted total for the 2026 Duparquet drilling campaign
Strike length expansion at Miroir 220 m 2026 drilling extended strike from 150 m to about 220 m
Drilling since 2022 resource estimate 48,000 m Total drilling across Duparquet since September 12, 2022 MRE
Latest reported 2026 drilling 1,553 m Drilling represented by the newly reported Miroir assays
Mineral Resource Estimate financial
"since the current Mineral Resource Estimate, which has an effective date"
A mineral resource estimate is a calculated approximation of how much metal or mineral material likely exists in a particular deposit and where it sits underground, similar to estimating how many cookies are in a jar by peeking at the layers. It matters to investors because it provides a data-based starting point for judging a project's potential value, future production and risks, while not guaranteeing recoverable or profitable amounts.
Multi-Jurisdictional Disclosure System regulatory
"Multi-Jurisdictional Disclosure System, and is therefore permitted"
A multi-jurisdictional disclosure system is a coordinated filing and publication process that lets companies share required financial, regulatory, or corporate information across several legal regions at once. Think of it like posting the same important notice on multiple community bulletin boards simultaneously so everyone who needs it — investors, regulators, and markets in different countries — sees the same, timely details. For investors this matters because it reduces delays and inconsistencies, making it easier to compare risks and make informed decisions when securities trade in more than one place.
NI 43-101 regulatory
"prepared in accordance with the requirements of NI 43-101"
A Canadian regulatory standard that sets the rules for how mining and exploration companies must report mineral resources and reserves, requiring technical reports prepared or signed off by an independent, certified expert. It matters to investors because it creates a consistent, transparent “inspection report” for mining projects, making it easier to compare prospects, judge the reliability of claims, and assess geological and financial risk before investing.
true widths technical
"Reported intervals are drilled core lengths. True widths have not yet"
True widths refer to the actual difference between the highest and lowest prices at which a stock has traded over a specific period, reflecting its real price range. This measure helps investors understand how much a stock's price has moved, providing insight into its volatility and trading activity. A wider true width indicates greater price fluctuation, which can signal higher risk or potential opportunity.
silica-altered technical
"This strongly brecciated unit is silica-altered and contains 2-5%"

FAQ

What did First Mining Gold (FFMGF) report from the 2026 Duparquet drilling program?

First Mining reported initial 2026 drill results from the Miroir target at Duparquet, including 5.26 g/t Au over 19.55 m in hole DUP26-093 and 3.43 g/t Au over 28.0 m in hole DUP26-096, as part of an approximately 15,000 m drilling program.

How has the Miroir target at Duparquet evolved in First Mining Gold’s 2026 program?

Drilling at Miroir has extended the strike length to about 220 m, up from 150 m tested in 2025, and has extended mineralization at depth to the east and west. Multiple high-grade gold intercepts support the potential scale and continuity of the mineralized zone.

What are the key highlighted drill intercepts in First Mining Gold’s Miroir update?

Highlighted intercepts include DUP26-093 with 5.26 g/t Au over 19.55 m, including 7.58 g/t Au over 12.95 m and 21.80 g/t Au over 1.0 m, and DUP26-096 with 3.43 g/t Au over 28.0 m, including 10.36 g/t Au over 7.2 m.

How much drilling has First Mining Gold completed at Duparquet since the current resource estimate?

Since the Mineral Resource Estimate effective September 12, 2022, First Mining has completed about 48,000 m of drilling across Duparquet, covering established resource areas and emerging targets, and is now updating the resource model to incorporate this new data.

What portion of the 2026 drilling results at Miroir has First Mining Gold reported so far?

The latest reported assays represent about 1,553 m of drilling from a total of 2,994 m across 11 drill holes at the Miroir target in 2026. Assay results for the final 12 samples of drill hole DUP26-096 and other drilling remain pending.

Under which technical reporting standards does First Mining Gold disclose Duparquet results?

The Duparquet technical information is prepared under NI 43-101, a Canadian disclosure rule for mineral projects. The company notes this may differ from United States securities law standards, so mineral deposit information may not be directly comparable to U.S. reporting.

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

Form 6-K

 

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT
TO RULE 13a-16 OR 15d-16 UNDER THE
SECURITIES EXCHANGE ACT OF 1934

 

For the month of September 2026

 

Commission File Number: 000-55607

 

 

First Mining Gold Corp.
(Translation of registrant's name into English)

 

 

Suite 2070, 1188 West Georgia Street, Vancouver, B.C., V6E 4A2
(Address of principal executive office)

 

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☐     Form 40-F ☒

 

 

 

 

 

 

 

 
 

 

 

 

 

DOCUMENTS FILED AS PART OF THIS FORM 6-K

 

Exhibits Description
99.1 Press Release dated September 10, 2026

 

 

 

SIGNATURES

 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

 

        First Mining Gold Corp.    
    (Registrant)
     
     

Date: September 10, 2026

      /s/ Richard Huang   
    Richard Huang
    Vice President, Corporate Development & Corporate Secretary
     

 

 

 Exhibit 99.1

 

 

   

 

First Mining Reports 5.26 g/t Au over 19.55 m as Drilling Expands Miroir Discovery at the Duparquet Project

DUP26-093 returns 5.26 g/t Au over 19.55 m, including 7.58 g/t over 12.95 m and including 21.80 g/t over 1.0 m
DUP26-096 returns 3.43 g/t Au over 28.0 m, including 10.36 g/t Au over 7.20 m

VANCOUVER, BC, Sept. 10, 2026 /CNW/ - First Mining Gold Corp. ("First Mining" or the "Company") (TSX: FF) (OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce initial results from the 2026 exploration drilling program at its Duparquet Gold Project ("Duparquet Project" or the "Project") located in the Abitibi region of Quebec, Canada. The Company commenced its 2026 drilling program at the Project in May 2026 and is targeting to complete an estimated 15,000 m of drilling focused on exploration and resource advancement opportunities. The results reported here are primarily from the Miroir target, a high-priority discovery zone first identified by First Mining in its 2024 drill program and further delineated and advanced through follow-up drilling in 2025 and 2026.

Drill holes DUP26-093 to DUP26-096 successfully targeted an important easterly and down plunge extension and returned the following highlights: DUP26-093 returned 5.26 g/t Au over 19.55 m, including 7.58 g/t Au over 12.95 m, and including 21.80 g/t Au over 1.0 m
DUP26-095 returned 3.36 g/t Au over 15.8 m, including 15.10 g/t Au over 2.0 m, and 3.54 g/t Au over 4.2 m, including 7.28 g/t Au over 1.0 m
DUP26-096 returned 3.43 g/t Au over 28.0 m, including 10.36 g/t Au over 7.2 m, and 2.99 g/t Au over 4.6 m, as well as 4.90 g/t Au over 2.7 m

In addition, drill hole DUP26-092 returned 3.33 g/t Au over 5.0 m, including 7.20 g/t Au over 1.0 m, and validated an extension of the mineralization towards the west and at depth (See Table 1 and 3 for details). The deposit remains open in all directions for additional exploration.

"We continue to be very active with our exploration program at Duparquet and are excited to announce the initial results from our 2026 program. The continued high-grade results from Miroir are very encouraging and demonstrate the potential of this target to become an important contributor to future resource growth and development planning at our Duparquet Project," stated Dan Wilton, CEO of First Mining. "We are pleased with the progress made through our successive drill programs and the continued expansion of mineralization at Miroir. With additional results still pending, we look forward to further advancing this target and evaluating its potential within the broader Duparquet Project."

In 2025, drilling at the Miroir target tested mineralization over a strike length of 150 m and to a vertical depth of 250 m. Building on these results, the 2026 exploration program has focused on testing extensions of the mineralized zone, with initial results received to date extending the known strike length to approximately 220 m, while also extending mineralization at depth in areas to the east and west (Figures 1 and 2).

Drilling at the Miroir target continues to demonstrate the potential for further expansion of mineralization at the Duparquet Project, with the multiple robust gold intercepts returned to date supporting the growing scale and continuity of the mineralized zone. The 2026 drilling program has continued to test the target along strike and at depth, further advancing the Company's understanding of the geometry and extent of mineralization. Additional drill results remain pending.

2026 Drilling and Resource Model Advancement

The 2026 drilling program at the Duparquet Project commenced in May 2026 and are continuing into Q4 2026, with the Company targeting the completion of a 15,000 m drilling campaign focused on key exploration and resource advancement opportunities. Assay results from the ongoing programs continue to be received, with additional results and interpretations to be disclosed in future updates as ongoing integration and modelling work continues.

In addition, First Mining has initiated an update to the Duparquet Project resource model to incorporate drilling completed since the current Mineral Resource Estimate, which has an effective date of September 12, 2022. Since that time, the Company has completed 48,000m of drilling across the Project at established resource areas and emerging exploration targets. The updated resource model will incorporate this new drilling and provide an opportunity to evaluate the potential impact of the additional data on the Project's mineral resource and geological understanding.

 

Figure 1: Plan view map, highlighting the Miroir Target’s location in relation to known mineralized and exploration zones in the Central Duparquet-Dumico area

 

Figure 2: Miroir Long Section, highlighting recent drilling as well as the open-ended potential of the Miroir interpreted structure

The latest reported assays represent approximately 1,553 m of drilling from a total of 2,994 m across 11 drill holes drilled at the Miroir target this year. These holes were focused on advancing the understanding of mineralization controls at Miroir and extending the target depth while testing the down-dip potential. Assay highlights are provided in Table 1, with the full list of assay results presented in Table 3 and drill collar details in Table 4. 

Table 1: Latest Significant 2026 Drill Intercepts

Hole ID   From (m) To (m) Length (m) Grade (Au g/t)
DUP26-092   155.5 156.5 1.0 11.80
DUP26-092   181.0 186.0 5.0 3.33
DUP26-092 inc. 181.0 182.0 1.0 7.20
DUP26-092   190.0 196.2 6.2 2.61
DUP26-093   182.0 201.55 19.55 5.26
DUP26-093 inc. 185.9 198.85 12.95 7.58
DUP26-093 and inc. 196.0 197.0 1.0 21.80
DUP26-095   1.2 17.0 15.8 3.36
DUP26-095 inc. 2.0 4.0 2.0 15.10
DUP26-095   170.3 174.5 4.2 3.54
DUP26-095 inc. 172.0 173.0 1.0 7.28
DUP26-0961   2.0 15.0 13.0 1.89
DUP26-0961   192.3 195.6 3.3 1.56
DUP26-0961   224.2 228.45 4.25 1.83
DUP26-0961   234.35 262.35 28.0 3.43
DUP26-0961 inc. 252.0 259.2 7.2 10.36
DUP26-0961   266.5 271.1 4.6 2.99
DUP26-0961   347.0 349.7 2.7 4.90
1 Assay results for the final 12 samples of drill hole DUP26-96 remain pending and are not included in the results reported above.

Additional Details on Miroir

The Miroir target forms an important part of a recently unlocked exploration advancement area located along the eastern mineralization trend of the Duparquet Project gold deposits. Exploration of the area also includes the CVD series of deposits as well as open trends to the north and south. The area is thought to represent new growth opportunities where a strong potential for additional continuity of gold mineralization and discoveries may exist along strike, down dip, and down plunge.

The 2026 drilling at the Miroir target focused on further delineating the extent of near-surface mineralization discovered in 2024. In 2025, drilling confirmed multiple near-surface gold zones and extended the discovery to a vertical depth of 250m which spanned approximately 150 m of strike length. A series of significant intercepts have been returned at Miroir to date (Table 2), with the most recent drilling continuing to confirm and expand the target area, extending mineralization to a strike length of 220 m and highlighting multiple near-surface gold zones.

Notable results from the most recent drilling include drill hole DUP26-093 returning 5.26 g/t Au over 19.55 m from 182.0 m to 201.55 m, including 7.58 g/t Au over 12.95 m, and including 21.80 g/t Au over 1.0 m. Drillhole DUP26-096 returned 3.43 g/t Au over 28.0 m from 234.35 m to 262.35 m, including 10.36 g/t over 7.2 m. These results continue to demonstrate the potential for multiple, high-quality gold zones within the Miroir target and reinforce its potential for further growth.

High-grade mineralization at the Miroir target is associated with coincident brittle deformation within a volcanic package proximal to syenite contacts. Mineralized intercepts are spatially correlated with northeast-southwest-striking D2 deformation zones that coincide with a geophysically inferred basalt-syenite contact plunging to the east.

In the most recent drill holes, mineralization is hosted within a mixed package composed primarily of basalt with syenite clasts. This strongly brecciated unit is silica-altered and contains 2-5% very fine-grained, disseminated to fracture-controlled bronze pyrite. In some areas, the alteration is sufficiently intense that evidence of the primary textures has been completely overprinted.

Table 2: Previous Disclosure Highlights from the Miroir target

Drill Hole   Interval Disclosure Date
DUP24-048   3.12 g/t Au over 19.35 m, including 5.47 g/t Au over 9.60 m and including 11.26 g/t Au over 3.0 m January 20, 2025
DUP25-052   2.77 g/t Au over 11.1 m, including 4.36 g/t Au over 6.5 m May 28, 2025
DUP25-064   3.23 g/t Au over 25.9 m, including 11.20 g/t Au over 2.0 m, and including 10.16 g/t Au over 1.4 m September 24, 2025
DUP25-078   2.01 g/t Au over 29.8 m, including 15.70 g/t Au over 0.75 m and 18.20 g/t Au over 1.0 m November 10, 2025
DUP25-085   3.74 g/t Au over 15.5 m and 7.18 g/t over 8.0 m, including 30.58 g/t over 1.65 m March 9, 2026
DUP25-090   4.08 g/t Au over 12.0 m, including 11.20 g/t Au over 1.0 m March 9, 2026

Table 3: Latest Assay Results from 2026 Drill Program

Hole ID   From (m) To (m) Length (m) Grade (Au g/t)
DUP26-092   55.0 59.0 4.0 0.79
DUP26-092   112.1 118.4 6.3 0.57
DUP26-092   135.0 136.0 1.0 0.49
DUP26-092   141.0 142.0 1.0 3.11
DUP26-092   155.5 156.5 1.0 11.80
DUP26-092   158.0 160.0 2.0 0.83
DUP26-092   181.0 186.0 5.0 3.33
DUP26-092 including 181.0 182.0 1.0 7.20
DUP26-092   190.0 196.2 6.20 2.61
DUP26-092   255.0 259.0 4.0 1.13
DUP26-093   160.1 166.05 5.95 0.78
DUP26-093   173.0 174.0 1.0 0.98
DUP26-093   182.0 201.55 19.55 5.26
DUP26-093 including 185.9 198.85 12.95 7.58
DUP26-093 and including 196.0 197.0 1.0 21.80
DUP26-094   231.0 233.1 2.1 1.69
DUP26-094   243.0 245.0 2.0 1.19
DUP26-094   249.0 250.0 1.0 0.50
DUP26-094   258.0 264.0 6.0 0.54
DUP26-094   268.0 271.0 3.0 1.25
DUP26-094   302.0 303.0 1.0 1.48
DUP26-095   1.2 17.0 15.8 3.36
DUP26-095 including 2.0 4.0 2.0 15.10
DUP26-095   170.3 174.5 4.2 3.54
DUP26-095 including 172.0 173.0 1.0 7.28
DUP26-095   246.0 247.0 1.0 0.54
DUP26-095   257.89 258.6 0.71 0.89
DUP26-0961   2.0 15.0 13.0 1.89
DUP26-0961   192.3 195.6 3.3 1.56
DUP26-0961   208.1 208.6 0.5 1.71
DUP26-0961   213.3 214.0 0.7 1.85
DUP26-0961   216.8 217.45 0.65 0.54
DUP26-0961   224.2 228.45 4.25 1.83
DUP26-0961   234.35 262.35 28.0 3.43
DUP26-0961 including 252.0 259.2 7.2 10.36
DUP26-0961   266.5 271.1 4.6 2.99
DUP26-0961   347.0 349.7 2.7 4.90
DUP26-0961   359.0 363.0 4.0 1.07
* Reported intervals are drilled core lengths. True widths have not yet been determined as the geometry and orientation of the mineralized zones remain under evaluation as exploration drilling continues. Assay values are uncut.
¹ Assay results for the final 12 samples of drill hole DUP26-96 remain pending and are not included in the results reported above.

Table 4: Latest 2026 Drill Hole Locations

  Azimuth (°) Dip (°) Length (m) Easting Northing
DUP26-092 340 -63 330 633531 5374046
DUP26-093 0 -50 258 633718 5374026
DUP26-094 0 -59 324 633718 5374026
DUP26-095 2 -48 260 633670 5374020
DUP26-096 0 -56 381 633670 5374020
Note: Collar coordinates in UTM NAD 83 z17

 

About the Duparquet Gold Project

The Duparquet Project is situated in the Abitibi Greenstone Belt and is geographically located approximately 50 km northwest of the city of Rouyn-Noranda. The Project benefits from easy access and proximity to an existing workforce and infrastructure, including road, rail and hydroelectric grid power. The Duparquet Project currently hosts an NI 43-101 compliant gold resource of 3.44 million ounces in the Measured & Indicated category, grading 1.55 g/t Au, and an additional 2.64 million ounces in the Inferred category, grading 1.62 g/t Au. First Mining completed a Preliminary Economic Assessment1 ("PEA") on the Project in 2023.

The Duparquet Project totals approximately 5,800 hectares focused on an area of 19 km of strike length along the prolific Destor-Porcupine Fault Zone, along with numerous mineralized splays and influential secondary lineaments. The Duparquet Project includes the past-producing Beattie, Donchester and Duquesne mines as well as the Central Duparquet, Dumico and Pitt Gold deposits.

1 Further details on the Duparquet PEA can be found in the technical report entitled "NI 43-101 Technical Report: Preliminary Economic Assessment, Duparquet Gold Project, Quebec, Canada" dated October 20, 2023, which was prepared for First Mining by G Mining Services Inc. in accordance with NI 43-101 and is available under First Mining's SEDAR+ profile at www.sedarplus.ca 

Analytical Laboratory and QA/QC Procedures

All sampling completed by First Mining within its exploration programs is subject to a Company standard of internal quality control and quality assurance (QA/QC) programs which include the insertion of certified reference materials, blank materials and a level of duplicate analysis. Core samples from the 2026 drilling program at Duparquet were sent to AGAT Laboratories, with sample preparation in Val d'Or, Quebec and analysis in Thunder Bay, Ontario, where they were processed for gold analysis by 50 gram fire assay with an atomic absorption finish. Samples from selected holes were sent to AGAT Laboratories in Calgary, Alberta, for multi-element analysis (including silver) by inductively coupled plasma (ICP) method with a four acid digest. AGAT Laboratories systems conform to requirements of ISO/IEC Standard 17025 guidelines and meets assay requirements outlined for NI 43-101.

Qualified Person

Caroline Pienaar, P.Geo., Director of Exploration for First Mining, is a "Qualified Person" for the purposes of NI 43-101 Standards of Disclosure for Mineral Projects and has reviewed and approved the scientific and technical disclosure contained in this news release.

About First Mining Gold Corp. 

First Mining is a gold developer advancing two of the largest gold projects in Canada, the Springpole Gold Project in northwestern Ontario, where the federal Environmental Assessment for the Springpole Project was approved in June 2026, , and the Duparquet Gold Project in Quebec, a PEA-stage development project located on the Destor-Porcupine Fault Zone in the prolific Abitibi region. First Mining also owns a 20% project interest in the Pickle Crow Gold Project in Ontario and a large equity interest in Seva Mining Corp.

First Mining was established in 2015 by Mr. Keith Neumeyer, founder and CEO of First Majestic Silver Corp.

ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton
Chief Executive Officer and Director

Cautionary Note Regarding Forward-Looking Statements

This news release includes certain "forward-looking information" and "forward-looking statements" (collectively "forward-looking statements") within the meaning of applicable Canadian and United States securities legislation including the United States Private Securities Litigation Reform Act of 1995. These forward-looking statements are made as of the date of this news release. Forward-looking statements are frequently, but not always, identified by words such as "expects", "anticipates", "believes", "plans", "projects", "intends", "estimates", "envisages", "potential", "possible", "strategy", "goals", "opportunities", "objectives", 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.

Forward-looking statements in this news release relate to future events or future performance and reflect current estimates, predictions, expectations or beliefs regarding future events and include but are not limited to, statements with respect to: (i) the potential for resource growth and future exploration success at the Project; (ii) the commencement and success of any environmental baseline programs at the Project; (iii) the compilation and interpretation of the drilling results at the Project; (iv) publication of a feasibility at the Duparquet Project; (v) feasibility and permitting activities related to the Springpole Gold Project; and (vi) realizing the value of the Company's gold projects for the Company's shareholders. All forward-looking statements are based on First Mining's or its consultants' current beliefs as well as various assumptions made by them and information currently available to them. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Forward-looking statements reflect the beliefs, opinions and projections on the date the statements are made and are based upon a number of assumptions and estimates that, while considered reasonable by the respective parties, are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies. Such factors include, without limitation the Company's business, operations and financial condition potentially being materially adversely affected by the outbreak of epidemics, pandemics or other health crises, and by reactions by government and private actors to such outbreaks; risks to employee health and safety as a result of the outbreak of epidemics, pandemics or other health crises, that may result in a slowdown or temporary suspension of operations at some or all of the Company's mineral properties as well as its head office; fluctuations in the spot and forward price of gold, silver, base metals or certain other commodities; fluctuations in the currency markets (such as the Canadian dollar versus the U.S. dollar); changes in national and local government, legislation, taxation, controls, regulations and political or economic developments; risks and hazards associated with the business of mineral exploration, development and mining (including environmental hazards, industrial accidents, unusual or unexpected formations, pressures, cave-ins and flooding); the presence of laws and regulations that may impose restrictions on mining; employee relations; relationships with and claims by local communities, indigenous populations and other stakeholders; availability and increasing costs associated with mining inputs and labour; the speculative nature of mineral exploration and development; title to properties.; and the additional risks described in the Company's Annual Information Form for the year ended December 31, 2025 filed with the Canadian securities regulatory authorities under the Company's SEDAR+ profile at www.sedarplus.ca, and in the Company's Annual Report on Form 40-F filed with the SEC on EDGAR.

First Mining cautions that the foregoing list of factors that may affect future results is not exhaustive. When relying on our forward-looking statements to make decisions with respect to First Mining, investors and others should carefully consider the foregoing factors and other uncertainties and potential events. First Mining does not undertake to update any forward-looking statement, whether written or oral, that may be made from time to time by the Company or on our behalf, except as required by law. 

Cautionary Note to United States Investors 

The Company is a "foreign private issuer" as defined in Rule 3b-4 under the United States Securities Exchange Act of 1934, as amended, and is eligible to rely upon the Canada-U.S. Multi-Jurisdictional Disclosure System, and is therefore permitted to prepare the technical information contained herein in accordance with the requirements of the securities laws in effect in Canada, which differ from the requirements of the securities laws currently in effect in the United States. Accordingly, information concerning mineral deposits set forth herein may not be comparable with information made public by companies that report in accordance with U.S. standards.

Technical disclosure contained in this news release has not been prepared in accordance with the requirements of United States securities laws and uses terms that comply with reporting standards in Canada with certain estimates prepared in accordance with NI 43-101.

NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning the issuer's material mineral projects. 

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SOURCE First Mining Gold Corp.

View original content to download multimedia: http://www.newswire.ca/en/releases/archive/September2026/10/c1218.html

%CIK: 0001641229

For further information: For further information, please contact: Toll Free: 1 844 306 8827 | Email: info@firstmininggold.com; Paul Morris | Director, Investor Relations | Email: paul@firstmininggold.com

CO: First Mining Gold Corp.

CNW 07:00e 10-SEP-26

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