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JAG.TO ·

Jaguar Mining Inc. Announces Closing of Bought Deal Private Placement FOR Gross Proceeds of C$28.0 Million

Financings

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JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

JAGUAR MINING INC. ANNOUNCES CLOSING OF BOUGHT DEAL PRIVATE PLACEMENT

FOR GROSS PROCEEDS OF C$28.0 MILLION

NOT FOR DISTRIBUTION TO UNITED STATES NEWSWIRE SERVICES OR FOR RELEASE,

PUBLICATION, DISTRIBUTION OR DISSEMINATION DIRECTLY, OR INDIRECTLY, IN WHOLE OR IN

PART, IN OR INTO THE UNITED STATES.

Toronto, ON – October 15, 2025 – Jaguar Mining Inc. (“Jaguar” or the Company”) (TSX: JAG) today

announced the closing of its previously announced “bought deal” private placement (the “ Offering”) for

aggregate gross proceeds of C$28 ,000,005, which includes the full exercise of the Underwriters’ (as defined

below) option. Pursuant to the Offering, the Company sold 5,090,910 common shares in the capital of the

Company (the “ Offered Shares”) at a price of C$ 5.50 per Offered Share. Red Cloud Securities Inc. (“ Red

Cloud”) acted as lead underwriter and bookrunner on behalf of a syndicate of underwriters that included

Research Capital Corporation and Ventum Financial Corp. (collectively with Red Cloud, the “Underwriters”).

The Company intends to use the net proceeds of the Offering to fund the restart of the Turmalina Mine at the

Company’s MTL Complex, exploration activities across the Company’s properties, as well as general working

capital and corporate purposes, as is more fully described in the Offering Document (as defined below).

In accordance with National Instrument 45 -106 – Prospectus Exemptions (“NI 45-106”), 3,272,728 Offered

Shares were issued to Canadian purchasers pursuant to the listed issuer financing exemption under Part 5A

of NI 45-106, as amended by Coordinated Blanket Order 45-935 – Exemptions from Certain Conditions of the

Listed Issuer Financing Exemption (the “Listed Issuer Financing Exemption”), and to purchasers resident in

jurisdictions other than Canada pursuant to available prospectus exemptions . Except for the Offered Shares

acquired by Eric Sprott, the Offered Shares issued to purchasers are not subject to a statutory hold period in

accordance with applicable Canadian securities laws and are immediately freely tradeable.

Eric Sprott, a related party of the Company, through 2176423 Ontario Ltd., a corporation that is beneficially

owned by him , acquired 1,818,182 Offered Shares under the Offering for aggregate gross proceeds to the

Company of $10,000,001.00. The participation of 2176423 Ontario Ltd. in the Offering constitutes a “related

party transaction” within the meaning of Multilateral Instrument 61-01 – Protection of Minority Security Holders

in Special Transactions (“MI 61 -101”). The Offering is exempt from the formal valuation and minority

shareholder approval requirements of MI 61 -101 since neither the fair market value of the subject matter of,

nor the fair market value of the consideration for, the Offering, insofar as it involves interested parties, exceeds

25% of the Company’s market capitalization. No new insiders and no control persons were created in

connection with the completion of the Offering.

Prior to the closing of the Offering, the Company had 80,130,272 common shares issued and outstanding, and

Mr. Sprott, directly or indirectly, held beneficial ownership of, and control and direction over, a total of

39,368,811 common shares of the Company, representing approximately 49.13% of the issued and

outstanding common shares (on a non -diluted basis). Following the closing of the Offering, the Company has

85,221,182 common shares issued and outstanding and Mr. Sprott, directly or indirectly, holds be neficial

ownership of, and control and direction over, a total of 41,186,993 common shares of the Company,

representing approximately 48.33% of the outstanding common shares (on a non-diluted basis). Full details of

this transaction will be disclosed on the System for Electronic Disclosure by Insiders (SEDI) at www.sedi.ca.

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JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

The Offered Shares acquired by Mr. Sprott were not sold pursuant to the Listed Issuer Financing Exemption,

are subject to a statutory hold period in accordance with applicable Canadian securities law and may not be

traded until February 16, 2026, except as permitted by applicable securities legislation and the policies of the

Toronto Stock Exchange (the “TSX”).

As consideration for their services, the Underwriters received aggregate cash fees of C$ 1,100,000.22 and

199,999 non-transferable common share purchase warrants (the “Broker Warrants”). Each Broker Warrant is

exercisable into one common share of the Company (each a “Broker Warrant Share ”) at a price of C$5.89

per Broker Warrant Share at any time on or before October 15, 2027. The Broker Warrants and Broker Warrant

Shares are subject to a statutory hold period in accordance with applicable Canadian securities law and may

not be traded until February 16, 2026, except as permitted by applicable securities legislation and the policies

of the TSX.

There is an amended and restated offering document dated October 7, 2025 relating to the Offering (the

“Offering Document”) that can be accessed under the Company's profile at www.sedarplus.ca and on the

Company’s website at www.jaguarmining.com.

The closing of the Offering remains subject to the final approval of the TSX.

The securities offered in the Offering have not been, and will not be, registered under the United States

Securities Act of 1933, as amended (the “U.S. Securities Act”) or any U.S. state securities laws, and may not

be offered or sold in the United States or to, or for the account or benefit of, United States persons absent

registration or any applicable exemption from the registration requirements of the U.S. Securities Act and

applicable U.S. state securities laws. This news release shall not constitute an offer to sell or the solicitation of

an offer to buy securities in the United States, nor shall there be any sale of the securities in any jurisdiction in

which such offer, solicitation or sale would be unlawful.

Luis Albano Tondo, Chief Executive Officer of Jaguar, commented : "We are proud to announce the

successful closing of this private placement, which represents a strong vote of confidence from our investors.

This capital infusion will be pivotal in accelerating the restart of our Turmalina Mine and expanding exploration

efforts across our highly prospective Brazilian portfolio. These strategic investments are designed to unlock

substantial value, reinforce our position as a responsible and growing gold producer, and drive long -term

benefits for all our stakeholders.”

Marina Freitas, Chief Financial Officer of Jaguar, commented: "The successful completion of this offering

underscores the financial community's confidence in Jaguar's strategy and disciplined approach to capital

management. The proceeds will be prudently allocated to high-impact priorities, including the restart of our

Turmalina Mine and targeted exploration programs, both essential to enhancing our production profile and

driving long -term shareholder value. This financing further strengthens our balance sh eet, providing the

flexibility needed to execute on our ambitious growth objectives."

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JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

The Iron Quadrangle

The Iron Quadrangle has been an area of mineral exploration dating back to the 16th century. The discovery

in 1699–1701 of gold contaminated with iron and platinum-group metals in the southeastern corner of the Iron

Quadrangle gave rise to the name of the town Ouro Preto (Black Gold). The Iron Quadrangle contains world -

class multi-million-ounce gold deposits such as Morro Velho, Cuiabá, and São Bento. Jaguar holds the second

largest gold land position in the Iron Quadrangle with over 46,000 hectares.

About Jaguar Mining Inc.

Jaguar Mining Inc. is a Canadian -listed junior gold mining, development, and exploration company operating

in Brazil with three gold mining complexes and a large land package with significant upside exploration potential

from mineral claims. The Company's principal operating assets are located in the Iron Quadrangle, a prolific

greenstone belt in the state of Minas Gerais and include the MTL complex (Turmalina mine and plant) and

Caeté complex (Pilar and Roça Grande mines, and Caeté plant). The Roça Grande mine has been on

temporary care and maintenance since April 2019. The Company also owns the Paciência complex (Santa

Isabel mine and plant), which had been on care and maintenance since 2012 and is under review to restart in

2026. Additional information is available on the Company's website at www.jaguarmining.com.

For further information please contact:

Luis Albano Tondo

Chief Executive Officer

Jaguar Mining Inc.

[email protected]

+55 31-99959-6337

Marina Freitas

Interim Chief Financial Officer

[email protected]

+55 31-98463-5344

Cautionary Statement Regarding Forward-Looking Statements

Certain statements in this news release constitute "forward -looking information" within the meaning of

applicable Canadian securities legislation. Forward -looking statements and information are provided for the

purpose of providing information about manage ment's expectations and plans relating to the future. All of the

forward-looking information made in this news release is qualified by the cautionary statements below and

those made in our other filings with the securities regulators in Canada. Forward-looking information contained

in forward-looking statements can be identified by the use of words such as "are expected", "is forecast", "is

targeted", "approximately", "plans", "anticipates", "projects", "continue", "estimate", "believe" or variations of

such words and phrases or statements that certain actions, events or results "may", "could", "would", "might"

or "will" be taken, occur or be achieved. All statements, other than statements of historical fact, may be

considered to be or include forward -looking information. This news release contains forward -looking

information regarding, among other things, the intended use of proceeds from the Offering, future capital

requirements, the receipt of any requisite regulatory approvals, including the final approval of the TSX, and the

Company's objectives, goals and future plans and strategies. The Company has made numerous assumptions

with respect to forward -looking information contained herein. Forward -looking information involves a number

of known and unknown risks and uncertainties, including among others: the risk of Jaguar not meeting its plans

and estimated timelines regarding the Company’s exploration, development and mining activities, operations

and financial performance; uncertainties with respect to the price of gold, labour disruptions, mechanical

failures, increases in costs (for environmental, weather-related, regulatory or any other reasons), environmental

compliance and change in environmental legislation and regulation, weather delays and delays due to natural

disasters, power disruptions, procurement and delivery of parts and supplies; uncertainties inherent to capital

markets in general (including the sometimes volatile valuation of securities and an uncertain ability to raise new

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JAGUAR MINING INC.

1400-25 Adelaide Street East, Toronto, Ontario M5C 3A1 T: 416-847-1854

capital) and other risks inherent to the gold exploration, development and production industry (including, without

limitation, risks associated with environmental hazards, tailings dam failures, industrial accidents, workplace

safety problems, unusual or u nexpected geological formations, pressures, cave -ins, flooding, chemical spills,

procurement fraud and gold bullion thefts and losses, and the risk of inadequate insurance, or the inability to

obtain insurance, to cover these risks), which, if incorrect, m ay cause actual results to differ materially from

those anticipated by the Company and described herein. Accordingly, readers should not place undue reliance

on forward-looking information.

For additional information with respect to these and other factors and assumptions underlying the forward -

looking information made in this news release, see the Company's most recent Annual Information Form and

Management's Discussion and Analysis, as well as other public disclosure documents that can be accessed

under the issuer profile of "Jaguar Mining Inc." on SEDAR+ at www.sedarplus.com. The forward -looking

information set forth herein reflects the Company's reasonable expectations as at the date of this news release

and is subject to change after such date. The Company disclaims any intention or obligation to update or revise

any forward-looking information, whether as a result of new information, future events or otherwise, other than

as required by law. The forward -looking information contained in this news release is expressly qualified by

this cautionary statement.