Integra Resources Closes Oversubscribed Bought Deal Financing FOR US$17 Million

1050 –400 Burrard Street

Vancouver, British Columbia, Canada

V6C 3A6

Email: [email protected]

FOR IMMEDIATE RELEASE TSXV:ITR ; NYSE American: ITRG

September 17, 2021

INTEGRA RESOURCES CLOSES OVERSUBSCRIBED BOUGHT DEAL FINANCING FOR US$17 MILLION

Vancouver, September 17, 2021 – Integra Resources Corp. (“Integra” or the “Company”) (TSX-V:ITR;

NYSE American:ITRG) is pleased to announce that it has closed its previously announced bought deal

financing (the “Offering”). Pursuant to the Offering, Integra issued 6,785,000 common shares of the

Company (the “Common Shares”), including 885,000 Common Shares issued in connection with the

exercise in full of the over-allotment option granted to the Underwriters (as defined below) in connection

with the Offering, at a price of US$2.55 per Common Share for gross proceeds of US$17,301,750.

Coeur Mining, Inc., which held approximately 6% of the issued and outstanding common shares of Integra

prior to the Offering, exercised its participation right and has maintained its ownership of approximately

6% through the purchase of a total of 423,213 Common Shares in the Offering.

The Offering was completed through a syndicate of underwriters led by Raymond James Ltd., and

including Cormark Securities Inc., National Bank Financial Inc., PI Financial Corporation, Stifel Nicolaus

Canada Inc., Canaccord Genuity Corp., Desjardins Securities Inc., H.C. Wainwright & Co., LLC, iA Private

Wealth Inc., and Roth Canada, ULC (collectively the “Underwriters”). The Underwriters received a cash

commission equal to 5.5% of the gross proceeds of the Offering (other than from the issue and sale of the

Common Shares to Coeur Mining, Inc., for which a 2.75% cash commission was paid).

The Company filed a preliminary prospectus supplement on September 13, 2021 (the “Preliminary

Supplement”) to its short form base shelf prospectus dated August 21, 2020 (the “Base Shelf Prospectus”).

The Company filed a final prospectus supplement (the “Final Supplement” and, together with the

Preliminary Supplement, the “Supplements”) to its Base Shelf Prospectus on September 14, 2021. The

Supplements were filed with the securities regulatory authorities in each of the provinces and territories

of Canada, except Québec. The Supplements were also filed with the United States Securities and

Exchange Commission (“SEC”) as part of the Company’s Registration Statement on Form F-10 (File No.

333-242483) (the “Registration Statement”) in accordance with the Multijurisdictional Disclosure System

established between Canada and the United States.

The Company intends to use the net proceeds to fund exploration and development expenditures at the

DeLamar Project and for working capital and general corporate purposes.

The Company has filed a registration statement on Form F-10 with the SEC for the Offering to which this

communication relates. Before you invest, you should read the Registration Statement, the Supplements

and other documents the Company has filed with the SEC for more complete information about the

Company and this Offering. You may get these documents for free by visiting EDGAR on the SEC website

at www.sec.gov or on the SEDAR website at www.sedar.com. Alternatively, the Company, any Underwriter

or any dealer participating in the Offering will arrange to send you the Supplements or you may request it

from Integra at 1050-400 Burrard Street, Vancouver, British Columbia, Canada, V6C 3A6, telephone (604)

416-0576.

About Integra Resources

Integra is a development-stage mining company focused on the exploration and de-risking of the past

producing DeLamar Gold-Silver Project in Idaho, USA. Integra is led by the management team from Integra

Gold Corp. which successfully grew, developed and sold the Lamaque Project, in Quebec, for C$600 M in

2017. Since acquiring the DeLamar Project, which includes the adjacent DeLamar and Florida Mountain

gold and silver Deposits, in late 2017, the Company has demonstrated significant resource growth and

conversion while providing a robust economic study in its maiden Preliminary Economic Assessment. The

Company is currently focused on resource growth through brownfield and greenfield exploration and the

completion of a Pre-Feasibility Study in Q4 2021 designed to advance the DeLamar Project towards

permitting and a potential construction decision. For additional information, please reference the

“Technical Report and Preliminary Economic Assessment for the DeLamar and Florida Mountain Gold –

Silver Project, Owyhee County, Idaho, USA (October 22, 2019).”

ON BEHALF OF THE BOARD OF DIRECTORS

George Salamis

President, CEO and Director

CONTACT INFORMATION

Corporate inquiries: [email protected]

Office phone: 1-604-416-0576

Forward looking and other cautionary statements

This news release contains “forward-looking information” and “forward-looking statements” (collectively,

“forward-looking statements”) within the meaning of the applicable Canadian and U.S. securities

legislation. All statements, other than statements of historical fact, are forward-looking statements and

are based on expectations, estimates and projections as at the date of this news release. Any statement

that involves discussion with respect to predictions, expectations, beliefs, plans, projections, objectives,

assumptions, future events or performance (often, but not always using phrases such as “plans”,

“expects”, “is expected”, “budget”, “scheduled”, “estimates”, “forecasts”, “intends”, “anticipates”, or

“believes” or variations (including negative 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) are

not statements of historical fact and may be forward-looking statements. In this news release, forward-

looking statements relate, among other things, to: the use of the net proceeds from the Offering;

anticipated advancement of mineral properties or programs; future operations; future growth potential

of Integra; and future development plans.

These forward-looking statements, and any assumptions upon which they are based, are made in good

faith and reflect our current judgment regarding the direction of our business. Management believes that

these assumptions are reasonable. Forward-looking information involves known and unknown risks,

uncertainties and other factors which may cause the actual results, performance or achievements of the

Company to be materially different from any future results, performance or achievements expressed or

implied by the forward-looking information. Such factors include, among others: risks related to the

speculative nature of the Company’s business; the Company’s formative stage of development; the

impact of COVID-19 on the timing of exploration and development work; the Company’s financial position;

possible variations in mineralization, grade or recovery rates; actual results of current exploration

activities; actual results of reclamation activities; conclusions of future economic evaluations; business

integration risks; fluctuations in general macroeconomic conditions; fluctuations in securities markets;

fluctuations in spot and forward prices of gold, silver, base metals or certain other commodities;

fluctuations in currency markets (such as the Canadian dollar to United States dollar exchange rate);

change in national and local government, legislation, taxation, controls regulations and political or

economic developments; risks and hazards associated with the business of mineral exploration,

development and mining (including environmental hazards, industrial accidents, unusual or unexpected

formation pressures, cave-ins and flooding); inability to obtain adequate insurance to cover risks and

hazards; the presence of laws and regulations that may impose restrictions on mining; employee relations;

relationships with and claims by local communities and indigenous populations; availability of increasing

costs associated with mining inputs and labour; the speculative nature of mineral exploration and

development (including the risks of obtaining necessary licenses, permits and approvals from government

authorities); and title to properties. Such factors are described in detail in the Supplements and the

documents incorporated by reference in the Supplements.

Forward-looking statements contained herein are made as of the date of this news release and the

Company disclaims any obligation to update any forward-looking statements, whether as a result of new

information, future events or results, except as may be required by applicable securities laws. There can

be no assurance that forward-looking information will prove to be accurate, as actual results and future

events could differ materially from those anticipated in such statements and there may be other factors

that cause results not to be anticipated, estimated or intended. Accordingly, readers should not place

undue reliance on forward-looking information.

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.