First Mining Gold closes $57.5M share offering

Net proceeds are designated for the Springpole and Duparquet gold projects, as well as general working capital and corporate purposes.

Rhea-AI Filing Summary

First Mining Gold Corp. closed a bought-deal offering that issued 68,459,500 common shares at $0.84 per share for aggregate gross proceeds of $57,505,980, including full exercise of the over-allotment option. The offering was completed through a syndicate co-led by Haywood Securities Inc., ATB Cormark Capital Markets and National Bank Financial Inc.

Net proceeds will be used to advance the Springpole and Duparquet gold projects and for general working capital and corporate purposes. The offering remains subject to receipt of final approval of the Toronto Stock Exchange. First Mining says the federal Environmental Assessment for Springpole was approved in June 2026.

Filing Explained

With the bought-deal shares now issued, First Mining has increased its share count by 68,459,500 shares, reducing existing holders’ percentage ownership absent offsetting changes.

Key Figures

Common shares issued: 68,459,500 shares Offering price: $0.84 per common share Aggregate gross proceeds: $57,505,980

3 metrics

Common shares issued 68,459,500 shares Bought-deal offering, including full exercise of the over-allotment option

Offering price $0.84 per common share Bought-deal offering

Aggregate gross proceeds $57,505,980 Bought-deal offering, including full exercise of the over-allotment option

Key Terms

bought deal public offering, over-allotment option, prospectus supplement, base shelf prospectus, +1 more

5 terms

bought deal public offering financial

"closed its previously announced bought deal public offering"

A bought deal public offering is when one or more investment banks agree to buy all newly issued shares from a company up front and then resell them to investors, effectively guaranteeing the company will receive the agreed capital. For investors it matters because this approach provides fast, certain funding but increases the number of shares outstanding, which can dilute existing ownership and influence short-term share price; the deal’s price and demand also signal market appetite.

over-allotment option financial

"including full exercise of the over-allotment option"

An over-allotment option is a special agreement that allows underwriters to sell more shares than initially planned if demand is high. Think of it like a retailer offering extra units of a popular product to meet additional customer interest. This option helps ensure the full sale is completed and can also give investors extra shares if they want more.

prospectus supplement regulatory

"by way of a prospectus supplement to the Company's base shelf prospectus"

A prospectus supplement is an additional document provided alongside a company's main offering details, offering updated or extra information about a specific financial product being sold. It helps investors understand the latest terms, risks, and details of the investment, similar to how an update or revision clarifies or expands on original instructions, ensuring they have current and complete information before making a decision.

base shelf prospectus regulatory

"the Company's base shelf prospectus dated February 23, 2026"

A base shelf prospectus is a pre-approved regulatory document that lets a company register a range of securities once and then sell them to the public over time without repeating the full approval process for each offering. For investors it’s like a menu and standing permission slip: it lays out the types of securities, key risks and terms ahead of any specific sale, so buyers can assess potential dilution, timing and the company’s plans before new shares or debt hit the market.

PEA-stage technical

"a PEA-stage development project"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did FFMGF issue in its offering?

First Mining Gold Corp. issued 68,459,500 common shares at $0.84 per share, including full exercise of the over-allotment option.

How much gross proceeds did FFMGF's offering generate?

The offering generated aggregate gross proceeds of $57,505,980, including full exercise of the over-allotment option.

Were First Mining shares offered in the United States?

The common shares were also offered by way of private placement in the United States and in offshore jurisdictions, in accordance with applicable securities laws and where doing so did not require a prospectus, registration statement, offering memorandum or similar document, or create reporting or other obligations for the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/24/2026 - 09:56 AM Accepted by SEC EDGAR 09/24/2026 - 09:56 AM Learn about SEC filing dates

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 24, 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 24, 2026		/s/ Richard Huang
		Richard Huang
		Vice President, Corporate Development & Corporate Secretary

 Exhibit 99.1

   

First Mining Closes $57.5 Million Bought-Deal Offering Including Full Exercise of Over-Allotment Option

/NOT FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES OR FOR DISSEMINATION IN THE UNITED STATES/

VANCOUVER, BC, Sept. 24, 2026 /CNW/ -- First Mining Gold Corp. ("First Mining" or the "Company") (TSX: FF) (FRANKFURT: FMG) is pleased to announce that it has closed its previously announced bought deal public offering (the "Offering"). Pursuant to the Offering, the Company has issued 68,459,500 common shares of the Company (the "Common Shares") at a price of $0.84 per Common Share (the "Offering Price") for aggregate gross proceeds of $57,505,980, including full exercise of the over-allotment option.

The Offering was completed through a syndicate of underwriters co-led by Haywood Securities Inc., ATB Cormark Capital Markets, and National Bank Financial Inc. and including Canaccord Genuity Corp., SCP Resource Finance LP, Beacon Securities Limited, H.C. Wainwright & Co., LLC, Ventum Financial Corp., and BMO Capital Markets (collectively, the "Underwriters").

The net proceeds from the Offering will be used to advance First Mining's Springpole and Duparquet gold projects, as well as for general working capital and corporate purposes.

The Offering was completed by way of a prospectus supplement (the "Supplement") to the Company's base shelf prospectus dated February 23, 2026 (the "Base Shelf Prospectus"), which Supplement was filed on September 21, 2026 with the securities commissions and other similar regulatory authorities in each of the provinces and territories of Canada. The Common Shares were also offered by way of private placement in the United States and in offshore jurisdictions in accordance with applicable securities laws and where doing so did not require a prospectus, registration statement, offering memorandum or similar document, or create reporting or other obligations for the Company.

Access to the Base Shelf Prospectus, the Supplement and any amendments to such documents are provided in accordance with securities legislation relating to procedures for providing access to a base shelf prospectus, a shelf prospectus supplement and any amendment to such documents. The Shelf Prospectus and the Supplement are accessible under the Company's profile on SEDAR+ at www.sedarplus.ca. Copies of the Base Shelf Prospectus, the Supplement, and any amendment to such documents may be obtained, without charge, from: (i) Haywood Securities Inc., by phone at (604) 697-7126 or by email at ecm@haywood.com, (ii) ATB Cormark Capital Markets, by phone at (416) 943-6701 or by email at ecm@atb.ca, or (iii) National Bank Financial Inc., by phone at (416) 869-8414 or by email at NBF-Syndication@bnc.ca.

The Offering remains subject to receipt of final approval of the Toronto Stock Exchange.

The Common Shares offered have not been registered under the U.S. Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of the Common Shares in any jurisdiction in which such offer, solicitation or sale would be unlawful.

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 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 the use of the proceeds of the Offering. 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 in this news release include, but are not limited to, statements with respect to: the Company's ability to obtain all approvals required in connection with the Offering; feasibility and permitting activities related to the Springpole Gold Project; realizing the value of the Company's gold projects for the Company's shareholders; Company's business strategy; future planning processes. Statements concerning proven and probable mineral reserves and mineral 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 as and if the property is developed, and in the case of measured and indicated mineral resources or proven and probable mineral reserves, such statements reflect the conclusion based on certain assumptions that the mineral deposit can be economically exploited.

Forward-looking statements reflect the beliefs, opinions and projections of management 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, including 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; requirements for additional capital; changes in project parameters as plans continue to be refined; variations in ore reserves, grade or recovery rates; actual performance of plant, equipment or processes relative to specifications and expectations; 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); effectiveness of environmental mitigations and strategies including production of NAG and PAG tailings and mine rock and water management strategies, 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. 

SOURCE First Mining Gold Corp.

View original content to download multimedia: http://www.newswire.ca/en/releases/archive/September2026/24/c0840.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 08:49e 24-SEP-26

Filing Exhibits & Attachments

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Press Releases

• EX-991 NEWS RELEASE DATED SEPTEMBER 24, 2026 13.6 KB