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Northisle Announces Closing of C$39.5 Million Private Placement Financings and Agreement with Wheaton Precious Metals

Financings

Northisle Copper and Gold Inc. | 14th Floor – 1040 West Georgia St. | Vancouver, BC | V6E 4H1

www.northisle.ca | [email protected]

AUGUST 8, 2025

TSXV: NCX

OTCQX: NTCPF

NORTHISLE ANNOUNCES CLOSING OF C$39.5 MILLION PRIVATE PLACEMENT

FINANCINGS AND AGREEMENT WITH WHEATON PRECIOUS METALS

NOT FOR DISTRIBUTION TO U.S. NEWSWIRE SERVICES OR FOR RELEASE, PUBLICATION, DISTRIBUTION OR

DISSEMINATION DIRECTLY OR INDIRECTLY, IN WHOLE OR IN PART, IN OR INTO THE UNITED STATES

Vancouver, B.C. – NorthIsle Copper and Gold Inc. (TSXV: NCX, OTCQX:NTCPF) (“Northisle” or the “Company”) is pleased

to announce that it has closed the previously announced brokered and non -brokered private placement s for gross

proceeds totalling C$ 39.5 million. Gross proceeds from the brokered listed issuer financing exemption (LIFE) private

placement offering (the “Brokered Offering ”) were approximately C$34.5 million, and gross proceeds from the non -

brokered private placement with Wheaton Precious Metals Corp. (“ Wheaton”) (the “ Non-Brokered Offering ”, and

collectively with the Brokered Offering, the “Offering”) were approximately C$5 million.

Sam Lee, President and CEO of Northisle stated: “ We are pleased to welcome Wheaton , a leading precious metals

company, and several significant institutional investors to our share registry. With an oversubscribed, upsized deal and

the exercise of the Agents’ option, we can now confidently accelerate the development of the project through to a pre -

feasibility study while continuing to advance the exploration of this highly prospective porphyry belt.”

Financing

The Brokered Offering consisted of (i) 9,338,000 common shares of the Company that qualify as “flow -through shares”

within the meaning of subsection 66(15) of the Income Tax Act (Canada) (the “CFT Shares”) issued at a price of $1.6065

per CFT Share, and (ii) 18,573,086 common shares (the “Non-FT Shares”, and together with the CFT Shares, the “Brokered

Shares”), issued at a price of $1.05 per Non-FT Share, which includes 4,286,086 Non-FT Shares issued pursuant to the

exercise of the Agents’ over-allotment option. The Brokered Offering was conducted by a syndicate of agents led by

Paradigm Capital Inc. as lead agent and sole bookrunner on behalf of a syndicate of agents including First Nations

Financial Markets Limited Partnership, Red Cloud Securities Inc., Ventum Financial Corp., and Raymond James Ltd.

(collectively, the “Agents”). The Agents received a cash commission of $1,874,197.04 in respect of the Brokered Offering.

The Agents’ commission was comprised of 6% of gross proceeds with the exception of subscribers on a president’s list

provided by the Company, to which a 2% commission was applied.

The Brokered Shares were offered for sale to purchasers resident in Canada, except Quebec, pursuant to the listed issuer

financing exemption under Part 5A of National Instrument 45-106 – Prospectus Exemptions. The Brokered Shares will not

be subject a statutory hold period in Canada (except to the extent the TSX Venture Exchange’s (“TSXV”) four-month hold

period applies ). Certain Brokered Shares were also issued in the United States pursuant to exemptions from the

registration requirements of the United States Securities Act of 1933, as amended (the “U.S. Securities Act”).

Concurrent to the Brokered Offering, the Company has closed the Non-Brokered Offering which comprised of 4,762,000

common shares of the Company (the “ Non-Brokered Shares ”) at a price of $1.05 per Non-Brokered Share for gross

proceeds of approximately C$5 million. The Non-Brokered Shares sold under the Non-Brokered Offering are subject to a

hold period pursuant to applicable Canadian securities laws expiring four months and one day from the date of issuance.

The gross proceeds raised from the sale of the CFT Shares shall be used to incur eligible “Canadian exploration expenses”

for exploration activities at the North Island Project that qualify as “flow-through critical mineral mining expenditures”

as such terms are defined in the Income Tax Act (Canada) and, for subscribers who are qualifying individuals under

the Income Tax Act (British Columbia), will qualify as “BC flow -through mining expenditures” as in the Income Tax

Act (British Columbia) (the “Qualifying Expenditures”). The Company will incur the Qualifying Expenditures on or before

December 31, 2026, and renounce (on a pro rata basis) all such expenditures in favour of the s ubscribers of the CFT

Northisle Copper and Gold Inc. | 14th Floor – 1040 West Georgia St. | Vancouver, BC | V6E 4H1

www.northisle.ca | [email protected]

Shares with an effective date no later than December 31, 2025 in accordance with the Income Tax Act (Canada). The net

proceeds from the sale of the Non -FT Shares, together with the proceeds raised from the Non -Brokered Offering and

other available funds, will be used for exploration, project development and for general corporate purposes.

A director of the Company participated in the Brokered Offering. The participation of the Company’s director in the

Brokered Offering constitutes a “related party transaction” under Multilateral Instrument 61-101 – Protection of Minority

Security Holders in Special Transactions (“MI 61-101”). This transaction is exempt from the formal valuation and minority

shareholder approval requirements of MI 61-101 pursuant to sections 5.5(a) and 5.7(1)(a) of MI 61-101, as the fair market

value of the securities to be distributed and the consideration to be received for the securities issued to related parties

under the Brokered Offering does not exceed 25% of the Company ’s market capitalization. The Company’s director

subscribed for 200,000 Non-FT Shares for aggregate gross proceeds of $210,000.

The securities have not been, and will not be, registered under the U.S. Securities Act, or any U.S. state securities laws,

and may not be offered or sold in the United States without registration under the U.S. Securities Act and all applicable

state securities laws or compliance with requirements of an applicable exemption therefrom. This press release shall not

constitute an offer to sell or the solicitation of an offer to buy securities in the Unite d States, nor shall there be any sale

of these securities in any jurisdiction in which such offer, solicitation or sale would be unlawful.

Right of First Refusal Agreement

In connection with the Non -Brokered Offering, Wheaton has entered into a right of first refusal agreement (the

“Agreement”) with Northisle pursuant to which Wheaton has paid Northisle C$10,000 and has been granted a right of

first refusal in respect of precious metal streams or royalties on selected claims from the North Island Project plus a one

kilometre area of interest surrounding the selected claims.

About Northisle

Northisle Copper and Gold Inc. is a Vancouver -based company whose mission is to become a leading and sustainable

mineral resource company for the future. Northisle owns the North Island Project, which is one of the most promising

copper and gold porphyry deposits in Canada. The North Island Project is located near Port Hardy, British Columbia on a

more than 34,000-hectare block of mineral titles 100% owned by Northisle stretching 50 kilometres northwest from the

now closed Island Copper Mine operated by BHP Billiton. Northisle recently completed an updated preliminary economic

assessment for the North Island Project and is now focused on advancement of the project through a prefeasibility study

while continuing exploration within this highly prospective land package. For more information on Northisle please visit

the Company’s website at www.northisle.ca.

On behalf of Northisle Copper and Gold Inc.

Nicholas Van Dyk, CFA

Chief Financial Officer

Tel: (604) 638-2515

Email: [email protected]

www.northisle.ca

This news release does not constitute an offer to sell or a solicitation of an offer to buy any of the securities in the

United States. The securities have not been and will not be registered under the U.S. Securities Act or any state

securities laws and may not be offered or sold within the United States or to U.S. Persons unless registered under the

U.S. Securities Act and applicable state securities laws or an exemption from such registration is available.

Cautionary Statements regarding Forward-Looking Information

Certain information in this news release constitutes forward-looking statements under applicable securities law. Any statements that are contained

in this news release that are not statements of historical fact may be deemed to be forward -looking statements. Forward-looking statements are

often identified by terms such as “may”, “should”, “anticipate”, “expect”, “intend” and similar expressions. Forward-looking statements in this news

Northisle Copper and Gold Inc. | 14th Floor – 1040 West Georgia St. | Vancouver, BC | V6E 4H1

www.northisle.ca | [email protected]

release include, but are not limited to, statements relating to the anticipated use of proceeds from the Offering as well as any other future plans,

objectives or expectations of Northisle . Forward-looking statements necessarily involve known and unknown risks, including, without limitation,

Northisle’s ability to implement its business strategies; risks associated with mineral exploration and production; risks ass ociated with general

economic conditions; adverse industry events; stakeholder engagement; mar keting and transportation costs; loss of markets; volatility of

commodity prices; inability to access sufficient capital from internal and external sources, and/or inability to access sufficient capital on favourable

terms; industry and government regulati on; changes in legislation, income tax and regulatory matters; competition; currency and interest rate

fluctuations; and other risks. Readers are cautioned that the foregoing list is not exhaustive.

Readers are further cautioned not to place undue reliance on forward -looking statements as there can be no assurance that the plans, intentions,

or expectations upon which they are placed will occur. Such information, although considered reasonable by mana gement at the time of

preparation, may prove to be incorrect and actual results may differ materially from those anticipated. Forward -looking statements contained in

this news release are expressly qualified by this cautionary statement.

The forward-looking statements contained in this news release represent the expectations of management of Northisle as of the date of this news

release, and, accordingly, are subject to change after such date. Northisle does not undertake any obligation to update or revise any forward-looking

statements, whether as a result of new information, future events or otherwise, except as expressly required by applicable securities law.

Neither the TSXV nor its Regulation Services Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the adequacy or

accuracy of this news release.