Amendment No

WHEREAS, the Board of Directors and stockholders of Enviri Corporation (the “Company”) have adopted the 2013 Equity and Incentive Compensation Plan, together with Amendment No. 1 to the 2013 Equity and Incentive Compensation Plan, Amendment No. 2 to the 2013 Equity and Incentive Compensation Plan, Amendment No. 3 to the 2013 Equity and Incentive Compensation Plan and Amendment No. 4 to the 2013 Equity and Incentive Compensation Plan (the “Plan”);

WHEREAS, pursuant to Section 3(a) of the Plan, a total of 13,677,000 shares of the common stock, par value $1.25 per share, of the Company (the “Common Stock”) have been reserved for issuance under the Plan;

WHEREAS, the Company desires (i) to increase the number of shares issuable under the Plan to an aggregate of 15,077,000 shares, including shares previously issued thereunder, (ii) to increase the aggregate limit on the number of shares that may be issued or transferred in connection with awards other than stock options or appreciation rights to 10,725,000 shares, (iii) to increase the number of shares that may be issued or transferred upon the exercise of incentive stock options from 13,677,000 shares to 15,077,000 shares, (iv) to implement a minimum one-year vesting period for all awards, except for (a) 5% of the maximum number of shares of common stock issued or transferred under the Plan, or (b) in the case of acceleration due to death, disability, retirement or a change in control or material divestiture, (v) extend the termination date of the Plan, and (vi) eliminate references from tax regulations that are no longer pertinent, among other matters; and

WHEREAS, Section 18 of the Plan permits the Company to amend the Plan from time to time, subject only to certain limitations specified therein;

NOW, THEREFORE, the following amendments and modifications are hereby made a part of the Plan subject to, and effective as of the date of, the approval of stockholders of the Plan as amended at the Company’s Annual Meeting of Stockholders on April 24, 2025:

1.    Section 2(i) of the Plan shall be, and hereby is, amended to change the definition of “Company” to “Enviri Corporation”.

2.    Section 2(j) of the Plan shall be, and hereby is, deleted in its entirety.

3.    Section 2(r) of the Plan shall be, and hereby is, deleted and replaced in its entirety to read as follows:

““Management Objectives” means the measurable performance objective or objectives established pursuant to this Plan for Participants who have received grants of Performance Shares, Performance Units or Cash Incentive Awards or, when so determined by the Committee, Option Rights, Appreciation Rights, Restricted Stock, Restricted Stock Units, dividend equivalents or other awards pursuant to this Plan.”

4.    Section 2(t) of the Plan shall be, and hereby is, deleted and replaced in its entirety to read as follows

““Non-Employee Director” means a person who is a “Non-Employee Director” of the Company within the meaning of Rule 16b-3 promulgated under the Exchange Act.”

5.    Section 2(dd) of the Plan shall be, and hereby is, deleted in its entirety.

6.    Section 3(a)(i) of the Plan shall be, and hereby is, amended such that clause (F) and the following proviso shall hereby read as follows:

“(F) in payment of dividend equivalents paid with respect to awards made under the Plan will not exceed in the aggregate 15,077,000 shares; provided, that notwithstanding anything in this Section 3, or elsewhere in this Plan, to the contrary and subject to adjustment as provided in Section 11 of this Plan, the aggregate number of shares of Common Stock actually issued or transferred by the Company in connection with awards other than Option Rights or Appreciation Rights granted under this Plan will not exceed 10,725,000 shares. Such shares may be shares of original issuance or treasury shares or a combination of the foregoing.”

7.    Section 3(b) of the Plan shall be, and hereby is, amended to read as follows:

“Notwithstanding anything in this Section 3, or elsewhere in this Plan, to the contrary and subject to adjustment as provided in Section 11 of this Plan, the aggregate number of shares of Common Stock actually issued or transferred by the Company upon the exercise of Incentive Stock Options will not exceed 15,077,000 shares.”

8.    Each of Section 3(c)(ii), Section 3(c)(iii), and Section 3(c)(iv) shall be, and hereby are, amended to remove each reference to “Qualified Performance-Based Awards.”

9.    Section 3(d) of the Plan shall be, and hereby is, amended to read as follows:

“Notwithstanding anything in this Plan to the contrary, up to 5% of the maximum number of shares of Common Stock that may be issued or transferred under this Plan as provided for in Section 3(a) of this Plan, as may be adjusted under Section 11 of this Plan, may be used for awards granted under Section 6 through Section 9 of this Plan that do not comply with the one-year vesting requirements set forth in such sections of this Plan.”

10.    Section 4 of the Plan shall be, and hereby is, amended to add the following Section 4(m):

“Each grant of Option Rights shall become exercisable no sooner than the first anniversary of the date of the grant.”

11.    Section 5(b) of the Plan shall be, and hereby is, amended to add the following Section 5(b)(vii):

“Each grant of Appreciation Rights shall become exercisable no sooner than the first anniversary of the date of the grant.”

12.    Section 6 of the Plan shall be, and hereby is, amended such that the Section shall hereby read as follows:

“Restricted Stock. The Committee may, from time to time and upon such terms and conditions as it may determine, authorize the grant or sale of Restricted Stock to Participants. Each such grant or sale may utilize any or all of the authorizations, and will be subject to all of the requirements, contained in the following provisions:

(a)    Each such grant or sale will constitute an immediate transfer of the ownership of Common Stock to the Participant in consideration of the performance of services, entitling such Participant to voting, dividend and other ownership rights, but subject to the substantial risk of forfeiture and restrictions on transfer hereinafter referred to.

(b)    Each such grant or sale may be made without additional consideration or in consideration of a payment by such Participant that is less than the Market Value per Share at the Date of Grant.

(c)    Each such grant or sale will provide that the Restricted Stock covered by such grant or sale that vests upon the passage of time will be subject to a “substantial risk of forfeiture” within the meaning of Section 83 of the Code for a period to be determined by the Committee at the Date of Grant or upon achievement of Management Objectives referred to in subparagraph (e) below. If the elimination of restrictions is based only on the passage of time rather than the achievement of Management Objectives, the period of time will be no shorter than one year.

(d)    Each such grant or sale will provide that during or after the period for which such substantial risk of forfeiture is to continue, the transferability of the Restricted Stock will be prohibited or restricted in the manner and to the extent prescribed by the Committee at the Date of Grant (which restrictions may include, without limitation, rights of repurchase or first refusal in the Company or provisions subjecting the Restricted Stock to a continuing substantial risk of forfeiture in the hands of any transferee).

(e)    Any grant of Restricted Stock may specify Management Objectives that, if achieved, will result in termination or early termination of the restrictions applicable to such Restricted Stock; provided, however, that notwithstanding subparagraph (c) above, restrictions relating to Restricted Stock that vests upon the achievement of Management Objectives may not terminate sooner than one year. Each grant may specify in respect of such Management Objectives a minimum acceptable level of achievement and may set forth a formula for determining the number of shares of Restricted Stock on which restrictions will terminate if performance is at or above the minimum or threshold level or levels, or is at or above the target level or levels, but falls short of maximum achievement of the specified Management Objectives.

(f)    Notwithstanding anything to the contrary contained in this Plan, any grant or sale of Restricted Stock may provide for the earlier termination of restrictions on such Restricted Stock (i) in the event of the retirement, death or disability of a Participant or (ii) in the event of a Change in Control where either (A) within a specified period the Participant is involuntarily terminated for reasons other than for cause or terminates his or her employment for good reason or (B) such Restricted Stock is not assumed or converted into replacement awards in a manner described in the Evidence of Award.

(g)    Any such grant or sale of Restricted Stock may require that any or all dividends or other distributions paid thereon during the period of such restrictions be automatically deferred and reinvested in additional Restricted Stock, which may be subject to the same restrictions as the underlying award; provided, however, that dividends or other distributions on Restricted Stock with restrictions that lapse as a result of the achievement of Management Objectives will be deferred until and paid contingent upon the achievement of the applicable Management Objectives.

(h)    Each grant or sale of Restricted Stock will be evidenced by an Evidence of Award and will contain such terms and provisions, consistent with this Plan, as the Committee may approve. Unless otherwise directed by the Committee, (i) all certificates representing Restricted Stock will be held in custody by the Company until all restrictions thereon will have lapsed, together with a stock power or powers executed by the Participant in whose name such certificates are registered, endorsed in blank and covering such shares or (ii) all Restricted Stock will be held at the Company’s transfer agent in book entry form with appropriate restrictions relating to the transfer of such Restricted Stock.”

13.    Section 7 of the Plan shall be, and hereby is, amended such that the Section shall hereby read as follows:

“Restricted Stock Units: The Committee may, from time to time and upon such terms and conditions as it may determine, authorize the granting or sale of Restricted Stock Units to Participants. Each such grant or sale may utilize any or all of the authorizations, and will be subject to all of the requirements, contained in the following provisions:

(a)    Each such grant or sale will constitute the agreement by the Company to deliver Common Stock or cash to the Participant in the future in consideration of the performance of services, but subject to the fulfillment of such conditions (which may include the achievement of Management Objectives) during the Restriction Period as the Committee may specify. If a grant of Restricted Stock Units specifies that the Restriction Period will terminate only upon the achievement of Management Objectives or that the Restricted Stock Units will be earned based on the achievement of Management Objectives, then, notwithstanding anything to the contrary contained in subparagraph (c) below, the applicable Restriction Period may not be a period of less than one year. Each grant may specify in respect of such Management Objectives a minimum acceptable level of achievement and may set forth a formula for determining the number of Restricted Stock Units on which restrictions will terminate if performance is at or above the minimum or threshold level or levels, or is at or above the target level or levels, but falls short of maximum achievement of the specified Management Objectives.

(b)    Each such grant or sale may be made without additional consideration or in consideration of a payment by such Participant that is less than the Market Value per Share at the Date of Grant.

(c)    If the Restriction Period lapses only by the passage of time rather than the achievement of Management Objectives as provided in subparagraph (a) above, each such grant or sale will be subject to a Restriction Period of not less than one year.

(d)    Notwithstanding anything to the contrary contained in this Plan, any grant or sale of Restricted Stock Units may provide for the earlier lapse or other modification of the Restriction Period (i) in the event of the retirement, death or disability of a Participant or (ii) in the event of a Change in Control where either (A) within a specified period the Participant is involuntarily terminated for reasons other than for cause or terminates his or her employment for good reason or (B) such Restricted Stock Units are not assumed or converted into replacement awards in a manner described in the Evidence of Award.

(e)    During the Restriction Period, the Participant will have no right to transfer any rights under his or her award and will have no rights of ownership in the Common Stock deliverable upon payment of the Restricted Stock Units and will have no right to vote them, but the Committee may, at the Date of Grant, authorize the payment of dividend equivalents on such Restricted Stock Units on either a current or deferred or contingent basis, either in cash or in additional Common Stock; provided, however, that dividend equivalents or other distributions on Common Stock underlying Restricted Stock Units with restrictions that lapse as a result of the achievement of Management Objectives will be deferred until and paid contingent upon the achievement of the applicable Management Objectives.

(f)    Each grant or sale of Restricted Stock Units will specify the time and manner of payment of the Restricted Stock Units that have been earned. Each grant or sale will specify that the amount payable with respect thereto will be paid by the Company in Common Stock or cash, or a combination thereof.

(g)    Each grant or sale of Restricted Stock Units will be evidenced by an Evidence of Award and will contain such terms and provisions, consistent with this Plan, as the Committee may approve.”

14.    Section 8 of the Plan shall be, and hereby is, amended such that the Section shall hereby read as follows:

“Cash Incentive Awards, Performance Shares and Performance Units. The Committee may, from time to time and upon such terms and conditions as it may determine, authorize the granting of Cash Incentive Awards, Performance Shares and Performance Units. Each such grant may utilize any or all of the authorizations, and will be subject to all of the requirements, contained in the following provisions:

(a)    Each grant will specify the number or amount of Performance Shares or Performance Units, or amount payable with respect to Cash Incentive Awards, to which it pertains, which number or amount may be subject to adjustment to reflect changes in compensation or other factors.

(b)    The Performance Period with respect to each Cash Incentive Award, Performance Share or Performance Unit will be such period of time (not less than one year for Performance Shares and Performance Units) as will be determined by the Committee at the time of grant, which may be subject to earlier lapse or other modification (i) in the event of the retirement, death or disability of a Participant or (ii) in the event of a Change in Control where either (A) within a specified period the Participant is involuntarily terminated for reasons other than for cause or terminates his or her employment for good reason or (B) such Cash Incentive Awards, Performance Shares

and Performance Units are not assumed or converted into replacement awards in a manner described in the Evidence of Award.

(c)    Any grant of Cash Incentive Awards, Performance Shares or Performance Units will specify Management Objectives which, if achieved, will result in payment or early payment of the award, and each grant may specify in respect of such specified Management Objectives a minimum acceptable level or levels of achievement and may set forth a formula for determining the number of Performance Shares or Performance Units, or amount payable with respect to Cash Incentive Awards, that will be earned if performance is at or above the minimum or threshold level or levels, or is at or above the target level or levels, but falls short of maximum achievement of the specified Management Objectives. The grant of a Cash Incentive Award, Performance Shares or Performance Units will specify that, before the Cash Incentive Award, Performance Shares or Performance Units will be earned and paid, the Committee must determine that the Management Objectives have been satisfied.

(d)    Each grant will specify the time and manner of payment of Cash Incentive Awards, Performance Shares or Performance Units that have been earned. Any grant may specify that the amount payable with respect thereto may be paid by the Company in cash, in Common Stock, in Restricted Stock or Restricted Stock Units or in any combination thereof.

(e)    Any grant of Cash Incentive Awards, Performance Shares or Performance Units may specify that the amount payable or the number of shares of Common Stock or Restricted Stock or Restricted Stock Units with respect thereto may not exceed a maximum specified by the Committee at the Date of Grant.

(f)    The Committee may, at the Date of Grant of Performance Shares, provide for the payment of dividend equivalents to the holder thereof either in cash or in additional Common Stock, subject in all cases to deferral and payment on a contingent basis based on the Participant’s earning of the Performance Shares with respect to which such dividend equivalents are paid.

(g)    Each grant of Cash Incentive Awards, Performance Shares or Performance Units will be evidenced by an Evidence of Award and will contain such other terms and provisions, consistent with this Plan, as the Committee may approve.”

15.    Sections 9(d) and 9(e) of the Plan shall be, and hereby are, amended such that these Sections shall hereby read as follows:

“(d)     If the earning or vesting of, or elimination of restrictions applicable to, an award granted under this Section 9 is based only on the passage of time rather than the

achievement of Management Objectives, the period of time shall be no shorter than one year. If the earning or vesting of, or elimination of restrictions applicable to, awards granted under this Section 9 is based on the achievement of Management Objectives, the earning, vesting or restriction period may not terminate sooner than one year from the Date of Grant.

(e)     Notwithstanding anything to the contrary contained in this Plan, any grant of an award under this Section 9 may provide for the earning or vesting of, or earlier elimination of restrictions applicable to, such award (i) in the event of the retirement, death or disability of the Participant, or (ii) in the event of a Change in Control where either (A) within a specified period the Participant is involuntarily terminated for reasons other than for cause or terminates his or her employment for good reason or (B) such awards are not assumed or converted into replacement awards in a manner described in the Evidence of Award.”

16.    Section 10(c) of the Plan shall be, and hereby is, amended, such that subsection (A) of such section shall hereby read as follows:

“the Committee will not delegate such responsibilities to any such officer for awards granted to an employee who is an officer, Director, or more than 10% beneficial owner of any class of the Company’s equity securities that is registered pursuant to Section 12 of the Exchange Act, as determined by the Committee in accordance with Section 16 of the Exchange Act.”

17.    Section 18(c) of the Plan shall be, and hereby is, amended, such that such section shall hereby read as follows:

“If permitted by Section 409A of the Code, but subject to the paragraph that follows, in the case of termination of employment by reason of death, disability or retirement, or in the event of a Change in Control, to the extent a Participant holds an Option Right or Appreciation Right not immediately exercisable in full, or any Restricted Stock as to which the substantial risk of forfeiture or the prohibition or restriction on transfer has not lapsed, or any Restricted Stock Units as to which the Restriction Period has not been completed, or any Cash Incentive Awards, Performance Shares or Performance Units which have not been fully earned, or any other awards made pursuant to Section 9 subject to any vesting schedule or transfer restriction, or who holds Common Stock subject to any transfer restriction imposed pursuant to Section 15(b) of this Plan, the Committee may, in its sole discretion, accelerate the time at which such Option Right, Appreciation Right or other award may be exercised or the time at which such substantial risk of forfeiture or prohibition or restriction on transfer will lapse or the time when such Restriction Period will end or the time at which such Cash Incentive Awards, Performance Shares or Performance Units will be deemed to have been fully earned or the time when such transfer restriction will terminate or may waive any other limitation or requirement under any such award.

Subject to Section 18(b) hereof, the Committee may amend the terms of any award theretofore granted under this Plan prospectively or retroactively. Subject to Section 11 above, no such amendment will impair the rights of any Participant without his or her consent. The Board may, in its discretion, terminate this Plan at any time. Termination of this Plan will not affect the rights of Participants or their successors under any awards outstanding hereunder and not exercised in full on the date of termination.”

18.    Section 20 of the Plan shall be, and hereby is, amended to extend the expiration date of the Plan for an additional two years, such that the third and final sentence of such section shall hereby read as follows”

“No grant will be made under this Plan after April 19, 2030, but all grants made on or prior to such date will continue in effect thereafter subject to the terms thereof and of this Plan.”

19.    In all other respects, the Plan, as amended, is hereby ratified and confirmed and shall remain in full force and effect.