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First Mining Announces Voting Results from 2025 AGM

Shareholder Meetings

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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NEWS RELEASE

First Mining Announces Voting Results from 2025 AGM

June 11, 2025 – Vancouver, Canada – First Mining Gold Corp. (“First Mining” or the “Company”) (TSX: FF)

(OTCQX: FFMGF) (FRANKFURT: FMG) is pleased to announce the voting results from the Company’s annual

general meeting of shareholders held in Vancouver on June 11, 2025 (the “2025 AGM”).

A total of 340,727,880 common shares of First Mining were represented at the 202 5 AGM, representin g

31.45% of the Company’s outstanding common shares as at the record date of April 23, 2025. Shareholders

voted in favour of all matters brought before the meeting. All five director nominees were elected as follows:

Election of Directors

Director Nominee Votes For % For Votes Withheld % Withheld

Keith Neumeyer 231,357,329 93.72% 15,495,894 6.28%

Raymond Polman 229,972,920 92.16% 16,880,303 6.84%

Daniel W. Wilton 244,450,882 99.03% 2,402,341 0.97%

Richard Lock 242,690,681 98.31% 4,162,542 1.69%

Leanne Hall 240,727,271 97.52% 6,125,952 2.48%

Appointment of Auditor

Outcome of the Vote Votes For % For Votes Withheld % Withheld

Carried 316,871,605 98.65% 4,345,828 1.35%

Approval of Unallocated Entitlements under Amendment and Restated Share-Based Compensation Plan

Outcome of the Vote Votes For % For Votes Against % Against

Carried 211,951,905 93.23% 15,390,872 6.77%

Detailed voting results for the meeting are available on SEDAR+ at www.sedarplus.ca.

About First Mining Gold Corp.

First Mining is a gold developer advancing two of the largest gold projects in Canada, th e Springpole Gold

Project in northwestern Ontario, where we have commenced a Feasibility Study and permitting activities are

on-going with a final Environmental Impact Statement / Environmental Assessment for the project submitted

in November 2024, 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 the Cameron Gold Project

in Ontario and a portfolio of gold project interests including the Pickle Crow Gold Project (being advanced in

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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partnership with Firefly Metals Ltd.) and the Hope Brook Gold Project (being advanced in partnership with Big

Ridge Gold Corp.).

First Mining was established in 2015 by Mr. Keith Neumeyer, founding President and CEO of First Majestic

Silver Corp.

ON BEHALF OF FIRST MINING GOLD CORP.

Daniel W. Wilton

Chief Executive Officer and Director

For further information, please contact:

Toll Free: 1 844 306 8827 | Email: [email protected]

Paul Morris | Director, Investor Relations | Email: [email protected]

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”, “plan s”, “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. All forward-looking statements are based on First

Mining's or its co nsultants' 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 mate rially 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 commo dities;

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 w ith 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 o n 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, 2024 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

TSX: FF

OTCQX: FFMGF

FRANKFURT: FMG

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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.