Mammoth Announces Final Closing of Its Upsized $980,000 Private Placement

www.mammothresources.ca

FOR IMMEDIATE RELEASE: August 19, 2025 No. 05/25

MAMMOTH ANNOUNCES FINAL CLOSING OF ITS UPSIZED

$980,000 PRIVATE PLACEMENT

Toronto, Canada (August 18, 2025) - Mammoth Resources Corp. (TSX-V: MTH), (the “Company”,

or “Mammoth”) is pleased to announced receipt of TSX Venture Exchange (the “Exchange”) approval

for a final closing of 39,222,300 units, consisting of one common share and one-half common share

purchase warrant (a “Unit”) for gross proceeds of $980,000 of its recently announced, upsized private

placement (the “Private Placement”) of up to 39 million Units, for gross proceeds of up to $980,000. The

upsized Private Placement is at the same terms as the Company’s initially announced $750,000 Private

Placement (refer to press release dated June 5, 2025), wherein each Unit offered at a price of $0.025 per

Unit, consists of one common share of the Company (a "Common Share") and one-half Common Share

purchase warrant (the "Warrant"). Each Warrant will entitle the holder thereof to acquire one Common

Share until eighteen months following the closing of the Private Placement, at an exercise price of $0.05.

The final closing date of the Private Placement is August 18, 2025.

As part of this Private Placement, Mr. Jose Antonio Berlanga Lopez, has purchased a 19.2% interest in

Mammoth, such investment in support of the previously announced strategic alliance between Mammoth

and RM Mineria S de RL de CV (refer to press release dated June 5, 2025).

Thomas Atkins, President and CEO of Mammoth commented on the closing of the financing and

next steps in the advancement of the Company, stating: "It’s terrific that there was such enthusiastic

demand for Mammoth’s shares in this private placement that we were able to upsize the amount from

an initially announced $750,000 placement to $980,000. Both the strategic partners and Mammoth

management and directors were significant participants in this financing. With the funds in place, we

look forward to working with our strategic partners, wherein we can combine Mammoth’s efforts in

Mexico with a group of experienced Mexican mine builders on projects in Mexico."

Jose Antonio Berlanga Lopez, President of RM Mineria S de RL de CV, reiterated his enthusiasm

for the financing and working with Mammoth, stating : "I’m happy that Mammoth was able to do so

well in this financing. We look forward to working together with Mammoth management, combining our

experienced group of mining and metallurgical professionals with an abundance of success developing

and restarting mineral extraction and processing facilities throughout Mexico, to build a strong platform

of project development opportunities in Mexico."

Mammoth believes that no party to this Private Placement would be considered a related party as no

party acquiring greater than 10% of the shares of the Company held any shares in Mammoth prior to

this financing and that despite a single investor acquiring more than 10% of the outstanding shares of

Mammoth via this transaction, that such investment being below 20%, that no Control Person has been

created and that blocking language within the warrant certificates to this financing prohibits gaining any

greater than a 20% interest in the company, and that this transaction neither constitutes an Insider Bid,

Issuer Bid or Business Combination. Furthermore, if the acquisition by any party of greater than 10% of

the Company via this Private Placement were to have been considered a related party transaction,

Mammoth believes it would be exempt from related party disclosure obligations under TSX Policy 5.9,

(reference to document OSC MI 61-101), sections 5.5 (b) and (g) and 5.7 (1) (b), (i), (ii), (iii), and (iv)

and (e).

The Strategic Alliance

Mammoth personnel were in discussions with the principals of RM Mineria S de RL de CV (“RM”) for

several months, building our relationship and combined vision for the future, which has led to the

formation of a strategic alliance between the parties. Mammoth sees an attractive union of initiatives

from the strategic alliance with RM, including direct Mexican mineral project development experience

and success that has the potential to enhance the future development of Tenoriba while also offering

Mammoth's shareholders exposure to future mineral production opportunities at a time when commodity

prices are on the rise.

One of the two principals of RM includes Mr. Jose Antonio Berlanga Balderas, CEO of RM, a private

Mexican company formed by a group of mining and metallurgical specialists. Mr. Berlanga Balderas is a

professional Mining and Metallurgical Engineer with over 45 years experience identifying, developing,

operating and optimizing mineral extraction opportunities in the Mexican mining sector. Mr. Berlanga

Balderas experience includes: providing technical services to Minera Autlan, and Servicios Industriales

Peñoles, while General Director Minas Nuevas, he directed one of the first heap leaching operations in

Mexico; as founder of Minera Mexico Michoacán, he was in charge of developing the El Oro project; he

was Technical Deputy Director of the Mining Development Trust (a Mexican state-owned company that

offers financing and technical assistance to mining companies); and as Development Manager,

Internacional de Metales Precios, was instrumental in the success of one of the main gold and silver

trading companies in Mexico.

Mr. Berlanga Balderas has a strong record in the Canadian junior mining industry, bringing significant

experience to companies in which he has participated and resulting in significant value creation,

including: Aurcana Corporation's La Negra mine, Cayden Resources' El Barqueño and various Morelos

Sur projects, Skeena Resources' Malpica Project, Cortez Goldcorp's Altiplano operation and Telson

Mining's (now Luca Mining) Tahuehueto and Campo Morado mine and facilities.

Mr. Berlanga Balderas has been President of the Colegio de Ingenieros de Minas y Metalurgistas y

Geologos de México (CIMMGM), has been District President and member of the National Board of

Directors in the Asociación de Ingenieros de Minas, Metalurgistas y Geólogos de Mexico (AIMMGM)

and is a member of the Prospectors and Developers Association of Canada (PDAC) and the American

Institute of Mining Engineers (AIME).

Mr. Berlanga Balderas is supported at RM by Mr. José Antonio Berlanga Lopez, President of RM. A

Professional Mining and Metallurgical Engineer, Mr. Berlanga Lopez has more than 20 years

experience in México. He is a graduate from the Universidad Nacional Autonoma de México (UNAM)

and has a strong background investigating mining opportunities, start-up companies, business strategy

and mineral concentrate trading in Mexico and has worked for several companies, such as Minera La

Negra, Altiplano Gold Silver, Mercuria, Azure Minerals, Reyna Mining Engineering.

Mr. Berlanga Lopez is a member of the Colegio de Ingenieros de Minas y Metalurgistas y Geologos de

México (CIMMGM), the Asociación de Ingenieros de Minas, Metalurgistas y Geólogos de Mexico

(AIMMGM), and of the Prospectors and Developers Association of Canada (PDAC).

About Mammoth Resources:

Mammoth Resources (TSX-V: MTH) is a precious metal mineral exploration Company focused on

acquiring and defining precious metal resources in Mexico and other attractive mining-friendly

jurisdictions in the Americas. The Company holds a 100% interest (subject to a 2% net smelter royalty

purchasable anytime within two years from commencement of commercial production for US$1.5

million) in the 5,333-hectare Tenoriba gold property located in the Sierra Madre Precious Metal Belt in

southwestern Chihuahua State, Mexico. Mammoth is seeking opportunities to invest in additional

exploration and development projects in the Americas on properties it deems to host above-average for

economic concentrations of precious metals mineralization. Mammoth recently entered into a strategic

alliance with RM Mineria S de RL de CV of Mexico in pursuit of additional project development

opportunities.

To find out more about Mammoth Resources and to sign up to receive future press releases, please visit the

company's website at: www.mammothresources.ca., or contact Thomas Atkins, President and CEO at: 416

509-4326.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of

the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

Forward Looking Information: This news release may contain or refer to forward-looking information. All

information other than statements of historical fact that address activities, events or developments that the

Company believes, expects or anticipates will or may occur in the future are forward-looking statements; examples

include the listing of its shares on a stock exchange and establishing mineral resources. These forward-looking

statements are subject to a variety of risks and uncertainties beyond the Company's ability to control or predict that

may cause actual events or results to differ materially from those discussed in such forward-looking statements.

Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by

applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking

statement, whether as a result of new information, future events or results or otherwise. Although the Company

believes that the assumptions inherent in the forward-looking statements are reasonable, forward-looking

statements are not guarantees of future performance and, accordingly, undue reliance should not be placed on

these forward-looking statements due to the inherent uncertainty therein.