Exhibit 4.3

Final

ALMONTY INDUSTRIES INC.

Amended and Restated Restricted Share Unit Plan

Amended and restated with effect from August 4, 2026

The purpose of the Amended and Restated Restricted Share Unit Plan is to enhance the Corporation’s ability to attract and retain talented employees, to promote an alignment of interests between such employees and the shareholders of the Corporation and to facilitate share ownership in the Corporation by its employees. The Corporation is establishing the Plan as of the Effective Date as a long term incentive.

market value of more than 50% of the aggregate fair market value of all of the assets of the Corporation at the time of such transaction or series of transactions;

where “Corporation” means the Corporation and its subsidiaries taken as a whole,

but excluding any amalgamation, merger, financing or other similar business combination or similar transaction which is initiated by the Corporation; or

In the Plan, references to the masculine gender include the feminine and references to the singular shall include the plural and vice versa, as the context shall require.

The Plan shall be governed by and construed in accordance with the laws of the Province of Ontario and the laws of Canada applicable therein. The Participants and the Corporation hereby attorn to the jurisdiction of the courts of the Province of Ontario with respect to any and all actions in relation to the Plan.

If any provision of the Plan is determined to be void or unenforceable in whole or in part, such void or unenforceable provision shall be severed from the remainder of the Plan and such determination shall not affect the validity or enforceability of any other provision hereof.

Headings are for ease of reference only and shall not affect the interpretation or construction of the provisions hereof.

The Committee may, from time to time in its sole discretion, award Units to an Eligible Employee or Eligible Director as a long term incentive and, upon such award, such Eligible Employee or Eligible Director shall become a Participant in the Plan. In respect of each award of Units, the Committee, in its sole discretion, shall designate:

Notwithstanding any vesting conditions attached to an award of Units under Section 6.1(b), the Committee may, in its sole discretion, accelerate the vesting of any such Units from time to time. For greater certainty, no Units shall vest later than the Latest Settlement Date in respect of such Units.

Units shall be credited to the Account of a Participant as of the date specified by the Committee. Units awarded shall vest in the Participant at such time or times, in such number and subject to such conditions as the Committee may specify.

In the event a dividend becomes payable on Shares, on the payment date for such dividend, each Participant’s Account shall be credited with a number of Units (including fractional Units) equal to: (a) the amount of the dividend paid per Share multiplied by the number of Units credited to the Participant’s Account as of the record date for payment of the dividend, divided by (b) the Fair Market Value as of the date for payment of the dividend. Subject to Section 10.3, Units credited to a Participant’s Restricted Share Unit Account under this Section 6.3 shall vest at the same time as the related Units vest and shall be settled in the same form, cash or Shares, as the related Units.

An award of Units to a Participant under Section 6.1 shall be evidenced by an Instrument of Grant signed by the Corporation and the Participant, the terms of which are approved by the Committee. The Corporation, as determined by the Committee, shall maintain in its books and records a Restricted Share Unit Account for each Participant recording at all times the number of Units standing to the credit of the Participant. Upon payment or Share issuance in satisfaction of Units credited to a Participant in the manner described herein, such Units shall be cancelled.

In the event of any stock dividend, stock split, combination or exchange of Shares, merger, consolidation, spin-off or other distribution (other than dividends in respect of which Section 6.3 applies) of the Corporation’s assets to shareholders, or any other change in the capital of the Corporation affecting Shares, such proportionate adjustments, if any, as the Committee in its discretion may deem appropriate to reflect such change, shall be made with respect to the number of Units outstanding under the Plan.

Should there be any change, other than a change specified above in this Section, in the number or kind of outstanding Shares or of any shares into which such Shares shall have been changed or for which they shall have been exchanged, then there shall be substituted for each Share of the Corporation referred to in the Plan or for each share into which such Share shall have been so changed or exchanged, the kind of shares into which each outstanding Share or each such share shall be so changed or exchanged and an equitable adjustment shall be made, which may be in the number of Units then recorded in the Participant’s Account or in the number of Shares or any shares into which such Shares shall have been changed or exchanged, such adjustment to be reasonably determined by the Committee and to be effective and binding for all purposes.

In the event that, at the Settlement Date, there is no public market for the Shares or for shares substituted therefor as provided for in this Section 6, the obligations of the Corporation under the Plan shall be met by a payment in cash in such amount as is reasonably determined by the Committee to be fair and equitable in the circumstances. Notwithstanding the preceding, the Fair Market Value shall always be established in relation to the fair market value of a Share.

In the event a Participant dies or becomes Disabled, the Units credited to the Participant under Section 6.1, together with any Units credited to the Participant under Section 6.3, will vest immediately if not otherwise vested under the Plan and the Participant or the Participant’s Beneficiary, as the case may be, will be entitled to receive the value of the Participant’s vested Units (in cash or Shares, as applicable), less applicable taxes and other amounts required to be withheld under Section 18. The applicable value of the vested Units (being cash and/or Shares) will be determined in accordance with Section 10 as of the Participant’s date of death or Disability, as applicable.

Subject to any agreement between a Participant and the Corporation or any Affiliate to the contrary, if there is a Change in Control and the employment of the Participant is terminated without cause within 12 months following the Change of Control, then the Units credited to the Participant under Section 6.1 and 6.4 will vest in full on the Termination Date. The Participant will be entitled to receive the value of all of the vested Units (in cash or Shares, as applicable), in accordance with Section 10, less applicable taxes and other amounts to be withheld under Section 18.

Subject to Section 8, in the event that the employment of a Participant is terminated for any reason other than death or Disability, the Participant will forfeit all rights, title and interest with respect to any unvested Units awarded to the Participant under the Plan and such Units will immediately expire and be cancelled on the Termination Date, unless otherwise determined by the Committee in its sole discretion. Any vested Units will continue to be governed by Section 10 and the other applicable provisions of the Plan.

For Units settled in Shares, the Corporation shall not be required to issue Shares or issue and/or cause to be delivered certificates evidencing Shares to be delivered pursuant to the Plan unless and until such issuance and delivery is in compliance with all applicable laws, regulations, rules, orders of governmental or regulatory authorities and the requirements of any stock exchange upon which Shares are listed. The Corporation shall in no event be obligated to take any action to comply with any such laws, regulations, rules, orders or requirements.

U.S. Participant’s Units must be paid to the U.S. Participant no later than the 15^th day of the third month following the end of the year in which the Units vest.

Subject to applicable law, a Participant may designate a Beneficiary to receive Shares issued or any amount payable under the Plan on the death of such Participant, and may change such designation from time to time. Such designation shall be in such form and executed and filed in such manner as the Committee may from time to time determine. If no Beneficiary is designated, the Participant’s legal representative will receive any Shares issued or amount payable under the Plan.

All references in the Plan currency refer to lawful Canadian currency. All payments made under the Plan shall be denominated in Canadian currency.

Units and any entitlement that may arise in respect thereof under this Plan are not assignable by a Participant or any Beneficiary or the estate of either of the foregoing.

Shares, if and when issued by the Corporation to settle vested Units issued under the Plan, shall be considered fully paid in consideration of past service that is no less in value than the fair equivalent of the money the Corporation would have received if the Shares had been issued for money.

The Board may amend or terminate the Plan, or any Units granted under the Plan, at any time and in such manner and to such extent as it deems advisable. Any amendments shall be contingent on approval of the Corporation’s shareholders to the extent stated herein, required by applicable law or required by any stock exchange on which Shares are listed.

No such amendment or termination shall materially adversely affect the rights of a Participant in respect of Units awarded to such Participant prior to the date of such amendment or termination without such Participant’s consent. Notwithstanding the foregoing, the obtaining of the written consent of any Participant to an amendment which materially adversely affects the rights of such Participant with respect to a grant shall not be required if such amendment is required to comply with applicable laws, regulations, rules, orders of governmental or regulatory authorities or the requirements of any stock exchange on which Shares are listed.

No amendments may be made by the Board to the Plan to effect any of the following without shareholder approval: (i) an increase in the maximum number of Shares reserved for issuance under the Plan or a change from a fixed maximum number of Shares to a fixed percentage; (ii) an amendment to the amendment provisions of the Plan; (iii) any amendment to remove or to exceed the insider participation limit specified in Section 4.3; (iv) an amendment extending the term of any award beyond its Latest Settlement Date; or (v) any amendment to Section 14 (Assignment).

However, all other amendments, including amendments of a “housekeeping” nature such as correcting typographical or clerical errors or adding clarifying statements to ensure the intent and meaning of the Plan, or of a grant under the Plan, is properly expressed, and any determinations made or discretion exercised by the Board, in accordance with the terms of the Plan will not require shareholder approval.

If any provision of the Plan or any agreement entered into pursuant to the Plan contravenes any applicable laws, regulations, rules, orders of governmental or regulatory authorities or the requirements of any stock exchange on which Shares are listed, then such provision shall be deemed to be immediately amended, at the time of such contravention, to the extent required to bring such provision into compliance therewith.

No director, officer, employee or agent of the Corporation or any member of the Committee or its delegates shall be personally liable or in any way responsible for any act or omission taken in good faith with respect to the Plan or the Rules.

The Board may adopt and apply rules that in its opinion will ensure that the Corporation and its Affiliates will be able to comply with applicable provisions of any federal, provincial, state or local law relating to the withholding of tax, including on the amount, if any, included in income of a Participant. The Corporation or any Affiliate may withhold from any amount payable to a Participant, either under this Plan, or otherwise, such amount as may be necessary so as to ensure that the Corporation or any Affiliate will be able to comply with applicable provisions of any federal, provincial, state or local law relating to withholding of tax or other required deductions, including on the amount, if any, includable in the income of a Participant. The Corporation or an Affiliate shall, in this connection, have the right in its discretion to satisfy any such liability by retaining or acquiring any Shares which would otherwise be issued to a Participant hereunder. The Corporation or any Affiliate shall also have the right to withhold the delivery of any Units and Shares to a Participant hereunder unless and until such Participant pays to the Corporation or an Affiliate a sum sufficient to indemnify the Corporation or such Affiliate for any liability to withhold tax in respect of the amounts included in the income of such Participant as a result of the settlement of Units under this Plan, to the extent that such tax is not otherwise being withheld from payments to such Participant by the Corporation or such Affiliate.

Notwithstanding any other provision in the Plan, the provisions of this Section 19 will apply to all

U.S. Participants with respect to Units issued under the Plan:

The Plan shall become effective upon its adoption by the Board of Directors and receipt of required regulatory and shareholder approval.