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Sherritt and Pala Announce Board Renewal and Collaboration Agreement

Management Changes Partnerships & JV

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SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

Sherritt and Pala Announce Board Renewal and Collaboration

Agreement

TORONTO, December 16, 2025 – Sherritt International Corporation (“ Sherritt” or the “ Corporation”)

(TSX:S) today announced that it has entered into a collaboration agreement (the “Agreement”) with Pala

Assets Holdings Limited (“ Pala”). Under the terms of the Agreement, Pala has withdrawn its requisition for

a special meeting of shareholders, agreed to customary standstill and voting covenants, and Sherritt has

made certain board and committee changes that will support the leadership transition and execution of

strategy.

The Agreement provides that Pala will observe a standstill through January 1, 2027. During the standstill

period, Pala may increase its beneficial ownership to, but not above, 9.99% of Sherritt’s issued and

outstanding common shares, and will have customary pre -emptive rights to maintain its ownership

percentage for so long as it continues to beneficially own at least 5% of the Corporation’s common shares .

The standstill does not restrict the exercise of Pala’s rights under the Put/Call Rights Agreement dat ed

April 17, 2025 between Sherritt and Pala. Pala has agreed to vote in favour of the Corporation’s board slate

at the 2026 annual meeting and at any other shareholder meetings involving the election of directors prior

to January 1, 2027.

To support the appointment of a permanent CEO, the board of directors of Sherritt (the “ Board”) will

comprise of no more than eight directors until January 1, 2027 . Effective immediately, Shelley Brown has

stepp ed down from the Board and Brett Richards has been appointed to fill the resulting vacancy . The

Board will reconstitute the CEO Search Committee, with Brian Imrie as Chair and Brett Richards and

Richard Moat as members. Brett Richards will serve on at least two standing committees of the Board. In

addition to the CEO Search Committee, he will join the Governance Committee. When the CEO Search

Committee is disbanded following the appointment of a permanent CEO , Brett Richards will join the

Reserves, Operations and Capital and Sustainability Committee , and he will be appointed to any new

committee formed by the Board during this period.

Brian Imrie, Chair of the Board , said, “We are pleased to have reached an agreement with Pala that will

provide stability through the leadership transition and allow the Board and management to focus on

executing our strategy for the benefit of all shareholders . We thank Shelley for her dedicated service and

are pleased to welcome Brett, whose extensive mining leadership experience will be a valuable asset to

Sherritt.”

Jan Weidner, CEO of Pala, added, “We have been invested in Sherritt for nearly a decade , and we believe

the agreement announced today reflects meaningful progress . It marks a constructive and positive outcome

for Sherritt and provides a strong foundation to unlock value through the selection of a new CEO . We see

great potential in Sherritt’s businesses, and are aligned in driving significant near-term value creation for all

shareholders.”

A copy of the Agreement will be filed on Sherritt’s profile on SEDAR+.

Brett Richards

Brett Richards is an experienced mining executive with more than 37 years in the industry, most recently

as chief executive officer of Pasofino Gold Ltd. He has held senior leadership roles at Gold X2 Mining Inc.

(formerly Goldshore Resources Inc.), Banro Corporation, Midnight Sun Mining Corp., African Thunder

Platinum, Renew Resources and Octéa, and previously served as transition CEO of Roxgold and as CEO

of Avocet Mining plc. He was part of the five -person start -up team at Katanga Mining and has held senior

executive positions with Kinross Gold and Co -Steel Inc. Mr Richards currently serves on the boards of

Nickel 28 Capital Corp., Gold X2 Mining Inc. (formerly Goldshore Resources Inc.) and Midnight Sun Mining

Corp.

About Sherritt

Sherritt is a world leader in using hydrometallurgical processes to mine and refine nickel and cobalt – metals

deemed critical for the energy transition. Leveraging its technical expertise and decades of experience in

critical minerals processing, Sherritt is committed to expanding domestic refining capacity and reducing

reliance on foreign sources. The Corporation operates a strategically important refinery in Alberta, Canada,

recognized as the only significant cobalt refinery and one of just three nickel refineries in North America.

Sherritt’s Moa Joint Venture has an estimated mine life of approximately 25 years and has recently

completed an expansion that is set to increase its annual mixed sulphate precipitate production by 20% of

contained nickel and cobalt.

The Corporation’s Power division, through its ownership in Energas, is the largest independent energy

producer in Cuba with installed electrical generating capacity of 506 MW, representing approximately 10%

of the national electrical generating capacity in Cuba. The Energas facilities are comprised of two combined

cycle plants that produce low -cost electricity from one of the lowest carbon emitting sources of power in

Cuba. Sherritt’s common shares are listed on the Toronto Stock Exchange under the symbol “ S”.

Contact Information

For further information, please contact:

Tom Halton

Director, Investor Relations and Corporate Affairs

[email protected]

(416) 935-2451

www.sherritt.com

Forward-Looking Statements

Certain statements and other information included in this press release may constitute “forward -looking

information” or “forward -looking statements” (collectively, “forward -looking statements”) under applicable

securities laws (such statements are often ac companied by words such as “anticipate”, “forecast”, “expect”,

“believe”, “may”, “will”, “should”, “estimate”, “intend” or other similar words). All statements in this press

release, other than those relating to historical information, are forward -looking statements, including, but

not limited to, statements regarding strategies. The Corporation cautions readers of this press release not

to place undue reliance on any forward -looking statement as a number of factors could cause actual future

results, conditions, actions or events to differ materiall y from the targets, expectations, estimates or

intentions expressed in the forward -looking statements. The key risks and uncertainties should be

considered in conjunction with the risk factors described in the Cor poration’s other documents filed with the

Canadian securities authorities, including without limitation the “Managing Risk” section of the

Management’s Discussion and Analysis for the three and nine months ended September 30, 2025 and the

Annual Information Form of the Corporation dated March 24, 2025 for the period ending December 31,

2024, which is available on SEDAR+ at www.sedarplus.ca.

The forward -looking information and statements contained in this press release are made as of the date

hereof and the Corporation undertakes no obligation to update publicly or revise any oral or written forward -

looking information or statements, whether a s a result of new information, future events or otherwise, except

as required by applicable securities laws. The forward -looking information and statements contained herein

are expressly qualified in their entirety by this cautionary statement.