Denison Mines Corp 6-K, filed Dec 1, 2025
Denison Mines Corp. (DNN)
6-K
2025-12-01
For: 2025-12-01
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April 07, 2026
About this 6-K
Denison Mines Corp filed this 6-K on December 1, 2025.
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
Date: December 1, 2025
Commission File Number: 001-33414
Denison Mines Corp.
(Name of
registrant)
1100-40 University Avenue
Toronto Ontario
M5J 1T1 Canada
(Address of
principal executive offices)
Indicate by check mark whether the registrant files
or will file annual reports under cover Form 20-F or Form
40-F.
Form
20-F ☐ Form 40-F ☒
Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule
101(b)(1): ☐
Indicate by check mark if the registrant is submitting the
Form 6-K in paper as permitted by Regulation S-T Rule
101(b)(7): ☐
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.
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DENISON MINES
CORP.
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/s/ Amanda Willett
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Date: December 1,
2025
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Amanda
Willett
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Vice
President Legal and Corporate Secretary
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FORM 6-K
EXHIBIT INDEX
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Exhibit Number
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Description
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99.1
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Press release dated December 1, 2025 |
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Exhibit 99.1
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PRESS
RELEASE
Denison & Ya’thi Néné Lands and Resources
Announce
Signing of the
Nuhenéné
Benefit Agreement
with Three First Nations and Four Municipalities
Saskatoon, SK – December
1, 2025. Denison Mines Corp. (“Denison” or the “Company”) (TSX: DML, NYSE American: DNN) and
the Ya'thi Néné Land and
Resource Office (“YNLR”) are pleased to announce the signing of
the Nuhenéné Benefit Agreement
(“Agreement”),
which is a regional mutual benefits agreement between Denison and
the Hatchet Lake Denesułiné First Nation, Black Lake
Denesułiné First Nation, Fond du Lac
Denesułiné First Nation, the Northern Hamlet of Stony
Rapids, the Northern Settlement of Uranium City, the Northern
Settlement of Wollaston Lake, the Northern Settlement of Camsell
Portage (collectively the “Athabasca
Communities”), and YNLR.
The Agreement provides the Athabasca Communities’ consent to
and support for the development and operation of Denison’s
majority owned and operated Wheeler River Project and Waterbury
Lake Project, and also includes Denison’s minority interest
in the Midwest Project (25.77% Denison owned), and the operating
McClean Lake Project (22.5% Denison owned), all of which are
located in northern Saskatchewan (collectively the
“Projects”).
David Cates, President and CEO of Denison
commented, “The
execution of the Nuhenéné Benefit Agreement marks another
significant milestone for Denison and the Wheeler River Project,
which is in the final stages of the Federal approval process for
the Environmental Assessment and construction license for the
planned Phoenix in-situ recovery uranium mine. Negotiations of the
Agreement began following the signing of an exploration agreement
between Denison and the Athabasca Communities in 2022. Since that
time, our team has focused its extensive engagement efforts towards
cultivating a strong and enduring relationship built on trust and
mutual respect. We are honoured to sign this agreement, and extend
our sincere appreciation to the leadership of the Athabasca
Communities, the YNLR board members involved in the negotiation
process, and the numerous community members and support staff that
have contributed to our engagement activities over the last several
years.”
“This agreement shows
what we can achieve when we put our people and our land at the
centre of every decision,” said Chief Bart Tsannie of
Hatchet Lake Denesųłiné First Nation. “We expect
responsible development, and we expect real benefits for our
communities. This agreement delivers on
that.”
Chief Coreen
Sayazie of Black Lake Denesųłiné First Nation
commented, “YNLR led these
negotiations with dedication, and we are proud of all who
contributed to this work. Denison came to the table with honesty
and integrity, and that helped us reach a fair and meaningful
agreement. This agreement is the result of many voices working
together for the Athabasca region, and it is a major achievement
for all our communities.”
“As Chief of Fond du
Lac Denesųłiné First Nation, I believe this
partnership will help build long-term prosperity for the Athabasca
region,” said Chief Ronnie Augier. “We believe in
sustainable development, but also in strong protection of the land
we depend on. Balancing these two priorities is central to Fond du
Lac’s and YNLR’s work, and this agreement supports that
balance for our children and future
generations.”
The Chairperson
of Wollaston Lake Post, Terri Daniels, commented, “This agreement
creates real opportunities for our people - good jobs, strong
training programs, and space for our local businesses to grow.
These benefits will help our members participate fully in the
northern economy.”
Mayor Daniel
Powder of Stony Rapids, stated, “This agreement
reflects years of hard work to protect our rights, our land, and
our way of life. It is a positive step that honours our values
while creating opportunities for our people to benefit from
activity in our territory.”
“Independent
environmental monitoring has always been a priority for our
communities,” said Uranium City Chairperson, Duane
Larocque. “This agreement
strengthens our role in overseeing the land, the water, and the
wildlife. It gives us a clear role in making sure the activities
are carried out with respect and
transparency.”
Chairperson
Claire Larocque of Camsell Portage said, “Our seven Athabasca
communities have worked side by side for many years, and this
agreement reflects the strength of that unity. When we stand
together, we open the door to real opportunities and positive
outcomes for our region.”
“Our ongoing work
with Denison has shown their readiness to listen, collaborate, and
support the priorities of Athabasca
residents,” said Mary Denechezhe, YNLR Board
Chair. “This agreement
builds on that foundation and creates meaningful opportunities for
our communities while supporting responsible
development.”
Figure 1: Map of Nuhenéné Benefits Agreement
Projects
Nuhenéné Benefit Agreement
The Agreement
acknowledges that the Projects are located within the
Nuhenéné Traditional Land of the Athabasca Denesułiné (see Figure 1) and
provides Denison with the Athabasca
Communities’ consent and support to advance the
Projects. Amongst other key commitments, the Agreement
provides the Athabasca
Communities and its members an important role in
environmental oversight, with specific recognition and support for
the protection of the Woodland Caribou and for surface water
monitoring. The Agreement also commits to the sharing of benefits
from the successful operation of the Projects — including
community investment, business opportunities, employment and
training opportunities, and financial compensation.
Overall, the
Agreement
describes a jointly held vision for the future that reflects a
mutual commitment to maintain an open, respectful, and cooperative
relationship between Denison and the Athabasca Communities.
Importantly, the Agreement
defines the characteristics of the positive legacy that will be
associated with the sustainable development of the
Projects.
About Denison
Denison is a leading uranium mining, development, and exploration
company with interests focused in the Athabasca Basin region of
northern Saskatchewan, Canada. Denison has an effective 95%
interest in its flagship Wheeler River Uranium Project, which is
the largest undeveloped uranium project in the infrastructure rich
eastern portion of the Athabasca Basin region of northern
Saskatchewan.
In mid-2023, the Phoenix feasibility study was completed for the
Phoenix deposit as an ISR mining operation, and an update to the
previously prepared 2018 Pre-Feasibility Study ('PFS') was
completed for Wheeler River's Gryphon deposit as a conventional
underground mining operation. Based on the respective studies, both
deposits have the potential to be competitive with the lowest cost
uranium mining operations in the world. Permitting efforts for the
planned Phoenix ISR operation commenced in 2019 and are nearing
completion with approval in July 2025 of the project's EA by the
Province of Saskatchewan and commencement in October 2025 of the
Canadian Nuclear Safety Commission Hearings for Federal approval of
the EA and project construction license. The Hearing is scheduled
to continue and be concluded during the week of December 8,
2025.
Denison's interests in Saskatchewan also include a 22.5% ownership
interest in the McClean Lake Joint Venture ('MLJV'), which includes
unmined uranium deposits (with mining at McClean North deposit via
the MLJV's SABRE mining method having commenced in July 2025 using
the MLJV's SABRE mining method) and the McClean Lake uranium mill
(currently utilizing a portion of its licensed capacity to process
the ore from the Cigar Lake mine under a toll milling agreement),
plus a 25.17% interest in the Midwest Joint Venture Midwest Main
and Midwest A deposits, and a 70.55% interest in the Tthe Heldeth
Túé ('THT') and Huskie deposits on the Waterbury Lake
Property. The Midwest Main, Midwest A, THT and Huskie deposits are
located within 20 kilometres of the McClean Lake mill. Taken
together, Denison has direct ownership interests in properties
covering ~384,000 hectares in the Athabasca Basin
region.
Additionally, through its 50% ownership of JCU (Canada) Exploration
Company, Limited ('JCU'), Denison holds interests in various
uranium project joint ventures in Canada, including the Millennium
project (JCU, 30.099%), the Kiggavik project (JCU, 33.8118%) and
Christie Lake (JCU, 34.4508%).
In 2024, Denison celebrated its 70th year in uranium mining,
exploration, and development, which began in 1954 with Denison's
first acquisition of mining claims in the Elliot Lake region of
northern Ontario.
For more information about Denison, please contact
David
Cates
(416) 979-1991 ext.
362
Geoff
Smith
(416) 979-1991 ext.
358
Vice President
Corporate Development & Commercial
Follow Denison on
X
@DenisonMinesCo
About YNLR and the Athabasca Communities of
Nuhenéné
YNLR is a non-profit organization owned by the seven Athabasca
Basin communities: Hatchet Lake First Nation, Black Lake First
Nation, Fond du Lac First Nation, and the northern municipalities
of Stony Rapids, Wollaston Lake, Uranium City, and Camsell Portage.
Together, these communities represent the heart of
Nuhenéné, the vast and culturally significant Traditional
Land of the Athabasca Denesułiné, encompassing remote
lakes, caribou ranges, traplines, travel routes, and harvesting
areas that continue to sustain the people in this
territory.
YNLR was established in 2016 following the signing of the
Ya’thi Néné Collaboration Agreement between the
Athabasca communities and uranium producers Cameco and Orano. The
organization was created to ensure that the voices, rights, and
long-term interests of Athabasca residents are meaningfully
represented in decisions affecting their lands, waters, and
communities.
YNLR works to protect the environmental, social, economic, and
cultural well-being of the Athabasca region, guided by the
knowledge, traditions, and aspirations of the Denesułiné
people. The organization serves as a regional steward and trusted
partner, working closely with industry and government to ensure
responsible development within Nuhenéné. Through
Indigenous-led land stewardship, rigorous environmental monitoring,
community engagement, and support for education, training, and
employment, YNLR strives to uphold a balanced approach that
protects the land and water for traditional use while promoting
sustainable development and economic opportunities for Athabasca
residents.
For more information about YNLR, please contact
Garrett
Schmidt (306) 370-3358
Executive
Director, YNLR
Kathy
Hay (306) 270-4083
Manager of
Corporate Affairs, YNLR
Follow YNLR on
Facebook, Instagram, LinkedIn @YathiNene
CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING
STATEMENTS
Certain information contained in this news release constitutes
‘forward-looking information’, within the meaning of
the applicable United States and Canadian legislation, concerning
the business, operations and financial performance and condition of
Denison. Generally, these forward-looking statements can be
identified by the use of forward-looking terminology such as
‘potential’, ‘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’ or
‘be achieved’.
In particular, this news release contains forward-looking
information pertaining to Denison's current intentions and
objectives with respect to, and commitments set forth in the
Nuhenéné Benefit Agreement; development and expansion
plans and objectives for the Projects; and expectations regarding
its joint venture ownership interests and the continuity of its
agreements with its partners and third parties.
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, uncertainties and other factors
that may cause the actual results, level of activity, performance
or achievements of Denison to be materially different from those
expressed or implied by such forward-looking statements. Denison
believes that the expectations reflected in this forward-looking
information are reasonable but no assurance can be given that these
expectations will prove to be accurate and results may differ
materially from those anticipated in this forward-looking
information. For a discussion in respect of risks and other factors
that could influence forward looking events, please refer to the
factors discussed in Denison’s Annual Information Form dated
March 28, 2025 or subsequent quarterly financial reports 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 news release is expressly qualified by this
cautionary statement. Any forward-looking information and the
assumptions made with respect thereto speaks only as of the date of
this news release. Denison does not undertake any obligation to
publicly update or revise any forward-looking information after the
date of this news release to conform such information to actual
results or to changes in Denison's expectations except as otherwise
required by applicable legislation.