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DML.TO ·

Denison Completes CAD$5 Million Bought Deal Private Placement of Flow-Through Shares

Financings

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Denison Mines Corp.

1100 – 40 University Ave

Toronto, ON M5J 1T1

www.denisonmines.com

@DenisonMinesCo

PRESS RELEASE

DENISON COMPLETES CAD$5 MILLION BOUGHT DEAL

PRIVATE PLACEMENT OF FLOW-THROUGH SHARES

NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES

OR FOR DISSEMINATION IN THE UNITED STATES

Toronto, ON – November 23, 2018. Denison Mines Corp . ("Denison" or the "Company") (DML: TSX;

DNN: NYSE American) is pleased to announce that it has completed its previously announced private

placement offering (the “Offering”) of common share s issued on a “flow-through” basis pursuant to the

Income Tax Act (Canada) (“Flow-Through Shares”).

The Company issued 4,950,495 Flow-Through Shares, a t a price of CAD$1.01 per Flow-Through Share,

for total gross proceeds of approximately CAD$5,000,000.

The Flow-Through Shares were issued through a syndi cate of underwriters led by Cantor Fitzgerald

Canada Corporation as sole bookrunner and including Haywood Securities Inc., Cormark Securities Inc.,

TD Securities Inc. and Eight Capital. The Flow-Thro ugh Shares are subject to a four-month hold period,

which will expire on March 24, 2019.

The Company has agreed to use the gross proceeds fr om the sale of the Flow-Through Shares for

"Canadian exploration expenses" (within the meaning of the Income Tax Act (Canada)) and anticipates

using the gross proceeds for expenses related to th e Company's uranium mining exploration projects in

Saskatchewan. The Company has also agreed to renoun ce such Canadian exploration expenses with an

effective date of no later than December 31, 2018.

About Denison

Denison is a uranium exploration and development company with interests focused in the Athabasca Basin

region of northern Saskatchewan, Canada. In additio n to its 90.0% owned Wheeler River project, which

ranks as the largest undeveloped high-grade uranium project in the infrastructure rich eastern portion of

the Athabasca Basin region, Denison's Athabasca Basin exploration portfolio consists of numerous projects

covering approximately 320,000 hectares. Denison's interests in Saskatchewan also include a 22.5%

ownership interest in the McClean Lake joint ventur e, which includes several uranium deposits and the

McClean Lake uranium mill, which is currently processing ore from the Cigar Lake mine under a toll milling

agreement, plus a 25.17% interest in the Midwest an d Midwest A deposits, and a 65.92% interest in the J

Zone deposit and Huskie discovery on the Waterbury Lake property. Each of Midwest, Midwest A, J Zone

and Huskie are located within 20 kilometres of the McClean Lake mill.

Denison is also engaged in mine decommissioning and environmental services through its Denison

Environmental Services division and is the manager of Uranium Participation Corp., a publicly traded

company which invests in uranium oxide and uranium hexafluoride.

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For more information, please contact

David Cates (416) 979-1991 ext. 362

President and Chief Executive Officer

Sophia Shane (604) 689-7842

Investor Relations

Follow Denison on Twitter @DenisonMinesCo

Cautionary Statement Regarding Forward-Looking Statements

Certain information contained in this press release constitutes "forward-looking information", within the meaning of the United States

Private Securities Litigation Reform Act of 1995 an d similar Canadian legislation concerning the busin ess, operations and financial

performance and condition of Denison. Generally, th ese forward-looking statements can be identified by the use of forward-looking

terminology such as "plans", "expects", "budget", " scheduled", "estimates", "forecasts", "intends", "anticipates", or "believes", or the

negatives and/or variations of such words and phrases, or state that certain actions, events or results "may", "could", "would", "might"

or "will be taken", "occur", "be achieved" or "has the potential to". In particular, this press release contains forward-looking information

pertaining to expectations regarding Denison’s joint venture ownership interests and the continuity of its joint venture agreements, the

Company’s exploration activities and plans and objectives and the anticipated use of proceeds of the Offering.

Forward looking statements are based on the opinions and estimates of management as of the date such statements are made, and

they are subject to known and unknown risks, uncert ainties and other factors that may cause the actual results, performance or

achievements of Denison to be materially different from those expressed or implied by forward-looking statements. Denison believes

that the expectations reflected in this forward-loo king information are reasonable but no assurance ca n be given that these

expectations will prove to be accurate and may diff er materially from those anticipated in this forwar d looking information. For a

discussion in respect of risks and other factors th at could influence forward-looking events, please r efer to the factors discussed in

Denison's Annual Information Form dated March 27, 2 018 under the heading "Risk Factors". These factors are not, and should not

be construed as being exhaustive. Accordingly, readers should not place undue reliance on forward-looking statements.

The forward-looking information contained in this press release is expressly qualified by this cautionary statement. Any forward-looking

information and the assumptions made with respect t hereto speaks only as of the date of this press rel ease. Denison does not

undertake any obligation to publicly update or revi se any forward-looking information after the date o f this press release to conform

such information to actual results or to changes in Denison's expectations except as otherwise required by applicable legislation.