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SYH.V ·

Skyharbour Closes Acquisition to Consolidate 100% Interest in the Russell Lake Uranium Project Vancouver, BC – Skyharbour Resources Ltd. (TSX-V: SYH) (OTCQX: SYHBF) (Frankfurt: SC1P) (“Skyharbour” or the “Company”) is pleased to announce that it has completed the

Mergers & Acquisitions

Suite 1030 – 505 Burrard Street, Vancouver, BC, Canada, V7X 1M5

www.skyharbourltd.com

TSX-V Trading Symbol: SYH

Email: [email protected]

Telephone: (604) 558-5847

Facsimile: (604) 687-3119

December 16th, 2025.

NEWS RELEASE

Skyharbour Closes Acquisition to Consolidate 100% Interest in the Russell Lake Uranium

Project

Vancouver, BC – Skyharbour Resources Ltd. (TSX-V: SYH) (OTCQX: SYHBF) (Frankfurt:

SC1P) (“Skyharbour” or the “Company”) is pleased to announce that it has completed the

acquisition of Rio Tinto Exploration Canada Inc.’s (“RTEC”) minority interest in the Russell Lake

Uranium Project (“Russell Lake” or the “Project”) pursuant to the previously announced definitive

and binding purchase agreement (the “Purchase Agreement”). The Project is strategically located

in the central core of the Eastern Athabasca Basin of northern Saskatchewan, with access to

regional infrastructure, including an all-weather road and powerline.

Russell Lake Project Location Map:

http://www.skyharbourltd.com/_resources/images/2025-11-14%20SKY-RussellLake-

Updated.jpg

Transaction Details:

Immediately prior to closing, RTEC’s interest in the Project was approximately 42.3%. Pursuant

to the terms of the Purchase Agreement, Skyharbour has acquired 100% of RTEC’s minority

interest in the Project in exchange for cash consideration of C$10 million (the “Purchase Price”).

The Purchase Price consisted of a C$2 million deposit, paid on signing the Purchase Agreement,

and a C$8 million cash payment paid at closing.

Skyharbour has granted to RTEC a 0.25% net smelter returns royalty over Russell Lake. The

acquisition of RTEC’s interest in Russell Lake has increased Skyharbour’s interest in the Project

to 100%, subject to several other net smelter return royalties held by third parties.

Russell Lake Uranium Project Overview:

The Russell Lake Project is a large, advanced-stage uranium exploration property totalling 73,314

hectares strategically located between Cameco’s Key Lake and McArthur River Projects, and

adjoining Denison’s Wheeler River Project to the west and Skyharbour’s Moore Uranium Project

to the east. The northern extension of Highway 914 between Key Lake and McArthur River runs

through the western extent of the property and greatly enhances accessibility, while a high-voltage

powerline is situated alongside this road.

Qualified Person:

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The technical information in this news release has been prepared in accordance with the

Canadian regulatory requirements set out in National Instrument 43 -101 and reviewed and

approved by Serdar Donmez, P.Geo., VP of Exploration for Skyharbour as well as a Qualified

Person.

About Skyharbour Resources Ltd.:

Skyharbour holds an extensive portfolio of uranium exploration projects in Canada's Athabasca

Basin and is well positioned to benefit from improving uranium market fundamentals with interest

in thirty -seven projects covering over 616,000 hectares (over 1.5 million acres) of land.

Skyharbour has acquired from Denison Mines, a large strategic shareholder of the Company, a

100% interest in the Moore Uranium Project, which is located 15 kilometres east of Denison's

Wheeler River project and 39 kilometres south of Cameco's McArthur River uranium mine. Moore

is an advanced -stage uranium exploration property with high -grade uranium mineralization in

several zones at the Maverick Corridor. Adjacent to the Moore Project is the Russell Lake Uranium

Project, which hosts widespread uranium mineralization in drill intercepts over a large property

area with exploration upside potential. The Company is actively advancing these projects through

exploration and drilling programs.

Skyharbour also has joint ventures with industry leader s Denison Mines, Orano Canada Inc.,

Azincourt Energy, and Thunderbird Resources at the Russell, Preston, East Preston, and Hook

Lake Projects, respectively. The Company also has several active earn -in option partners,

including CSE-listed Basin Uranium Corp. at the Mann Lake Uranium Project; TSX-V listed North

Shore Uranium at the Falcon Project; UraEx Resources at the South Dufferin and Bolt Projects;

Hatchet Uranium at the Highway Project; CSE -listed Mustang Energy at the 914W Project; and

TSX-V listed Terra Clean Energy at the South Falcon East Project.

In aggregate, Skyharbour has now signed earn -in option agreements with partners that total to

potentially over $76 million in partner -funded exploration expenditures and over $42 million in

cash and share payments coming into Skyharbour, assuming that these partner companies

complete their entire earn-ins at the respective projects.

Skyharbour’s Uranium Project Map in the Athabasca Basin:

https://skyharbourltd.com/_resources/maps/SKY-SaskProject-Locator-2025-12-08.jpg

To find out more about Skyharbour Resources Ltd. (TSX -V: SYH) visit the Company’s website

at www.skyharbourltd.com.

SKYHARBOUR RESOURCES LTD.

“Jordan Trimble”

Jordan Trimble

President and CEO

For further information contact myself or:

Nicholas Coltura

Corporate Communications Manager

Skyharbour Resources Ltd.

Telephone: 604-558-5847

Toll Free: 800-567-8181

Facsimile: 604-687-3119

Email: [email protected]

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NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICES

PROVIDER ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THE

CONTENT OF THIS NEWS RELEASE.

This release includes certain statements that may be deemed to be "forward-looking statements".

All statements in this release, other than statements of historical facts, that address events or

developments that management of the Company expects, are forwa rd-looking statements.

Although management believes the expectations expressed in such forward -looking statements

are based on reasonable assumptions, such statements are not guarantees of future

performance, and actual results or developments may differ materially from those in the forward-

looking statements. The Company undertakes no obligation to update these forward -looking

statements if management's beliefs, estimates or opinions, or other factors, should change.

Factors that could cause actual results to differ materially from those in forward -looking

statements, exploration and development successes, regulatory approvals including TSXV

approval, and general economic, market or business conditions. Please see the public filings of

the Company at www.sedarplus.ca for further information.