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AGI.TO ·

Alamos Gold Recognized as a Top Performer by the Toronto Stock Exchange with Inclusion in the TSX30 for the Second Consecutive Year

Marketing Announcement

ALAMOS GOLD INC.

Brookfield Place, 181 Bay Street, Suite 3910, P.O. Box #823

Toronto, Ontario, Canada M5J 2T3

Telephone: (416) 368-9932 or 1 (866) 788-8801

All amounts are in United States dollars, unless otherwise stated.

F O R I M M E D I A T E R E L E A S E

W E B S I T E : w w w . a l a m o s g o l d . c o m T R A D I N G S Y M B O L : T S X : A G I N Y S E : A G I

Alamos Gold Recognized as a Top Performer by the Toronto Stock Exchange

with Inclusion in the TSX30 for the Second Consecutive Year

Toronto, Ontario (September 9, 2025) – Alamos Gold Inc. (TSX:AGI; NYSE:AGI) (“Alamos”

or the “Company”) is pleased to announce that it has been recognized for the second

consecutive year as a TSX30 ™ 2025 winner by the Toronto Stock Exchange ("TSX"). The

annual ranking recognizes the 30 top performing stocks based on their dividend-adjusted share

price performance over a three -year period. Alamos’ share price increased 310% over the

trailing three-year period.

“We are honoured to receive this recognition for the second year in a row. This achievement

reflects our ongoing commitment to building a sustainable business that delivers strong returns

for all of our stakeholders,” said John A. McCluskey, President and Chief Executive Officer.

“Looking ahead, our strong pipeline of growth projects, increasing gold production, and

improving cost profile position us to deliver even greater value while maintaining the financial

strength and operational excellence that continue to define Alamos as a leading gold producer.”

“The 2025 TSX30 captures the evolution of our capital markets, where companies are scaling

to compete globally for market share and capital. These top performers represent diverse

sectors unified by strategic positioning and proven execution,” said Loui Anastasopoulos, CEO,

Toronto Stock Exchange. “Together, this list highlights how companies are capitalizing on

prevailing economic trends, with investors prioritizing sustainable value creation from

companies with proven business models and strong cash flow generation, whether in

transformative technologies or our world-class resource and industrial sectors.”

For more information on the 2025 TSX30™ rankings, visit www.tsx.com/tsx30.

About Alamos

Alamos is a Canadian-based intermediate gold producer with diversified production from three

operations in North America. This includes the Island Gold District and the Young-Davidson mine

in northern Ontario, Canada, and the Mulatos District in Sonora State, Mexico. Additionally, the

Company has a s trong portfolio of growth projects, including the Phase 3+ Expansion at Island

Gold, and the Lynn Lake project in Manitoba, Canada. Alamos employs more than 2,400 people

and is committed to the highest standards of sustaina ble development. The Company’s shares

are traded on the TSX and NYSE under the symbol “AGI”.

T R A D I N G S Y M B O L : T S X : A G I N Y S E : A G I

2 | ALAMOS GOLD INC

FOR FURTHER INFORMATION, PLEASE CONTACT:

Scott K. Parsons

Senior Vice President, Corporate Development & Investor Relations

(416) 368-9932 x 5439

Khalid Elhaj

Vice President, Business Development & Investor Relations

(416) 368-9932 x 5427

[email protected]

The TSX and NYSE have not reviewed and do not accept responsibility for the adequacy or accuracy of this release.

Other than the quote attributed to the CEO of the Toronto Stock Exchange, no stock exchange, securities commission

or other regulatory authority has approved or disapproved the information contained herein.

Cautionary Note Regarding Forward Looking Statements

Certain of the statements made and information contained herein, other than statements of historical fact and

historical information, is "forward-looking information" within the meaning of applicable Canadian and U.S. securities

laws. Forward-looking statements are generally, but not always, identified by the use of forward-looking terminology

such as "will", "may", “expect”, “ongoing”, “looking ahead”, or variations of such words or phrases that certain actions,

events or results "could” "might" or "will" occur or be achieved. Forward -looking statements in this press release

include information and statements regarding business sustainability; returns to stakeholders; the Company’s growth

projects; gold production; cost profile; value of operations and financial and operational results including delivering

greater value, and maintaining financial strength and operational excellence . The declaration and payment of

dividends remains at the discretion of the Board of Directors and will depend on the Company's financial results,

cash requirements, future prospects and other factors deemed relevant by the Board of Directors. Alamos cauti ons

that forward-looking statements are necessarily based upon several factors and assumptions that, while considered

reasonable by the Company at the time of making suc h statements, are inherently subject to significant business,

economic, legal, political and competitive uncertainties and contingencies. Known and unknown factors could cause

actual results to differ materially from those projected in the forward -looking statements and undue reliance should

not be placed on such statements or information . Risk factors that may affect the Company’s ability to achieve the

expectations set forth in the forward looking statements in this press release are set out in the Company’s latest

40F/Annual Information Form and Management’s Discussion and Analysis, each under the heading “Risk Factors”

available on the SEDAR+ website at www.sedarplus.ca or on EDGAR at www.sec.gov, and should be reviewed in

conjunction with the information and assumptions found in this press release. The Company disclaims any intention

or obligation to update or revise any forward-looking statements whether as a result of new information, future events

or otherwise, except as required by applicable law.