0002104052-26-000120 | 11-K | XBRL Viewer

Plan Termination	12 Months Ended
Dec. 31, 2025
EBP 224
EBP, Description of Plan [Line Items]
Plan Termination	Plan Termination Although the Company has not expressed any intent to discontinue the Plan, it reserves the right to terminate the Plan at any time or discontinue contributions and loans thereunder, subject to the provisions of ERISA. In the event of Plan termination, the accounts of each affected employee would be fully vested. Complete distributions or withdrawals would be distributed to Plan participants and beneficiaries in proportion to their respective account balances.

Related-Party and Party In Interest Transactions	12 Months Ended
Dec. 31, 2025
EBP 224
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Related-Party and Party In Interest Transactions	Related-Party and Party in Interest Transactions The Plan's investments are shares of mutual funds managed by the Delaware Charter Guarantee & Trust Company, d/b/a Principal Trust Company, whose fees are paid by the Plan. These transactions qualify as party in interest transactions. Fees paid by the Plan for the investment management services amounted to $160 thousand during the year ended December 31, 2025 and are included in Administrative expenses on the Statement of Changes in Net Assets Available for Benefits. Transactions in the common stock held by the Master Trust also qualify as party in interest transactions. For the year ended December 31, 2025, the Plan purchased $133 thousand and sold $238 thousand of Legacy Enviri's common stock on behalf of participants. Additionally, notes receivable from participants qualify as party in interest transactions. For the year ended December 31, 2025, the Plan received $170 thousand in interest income on notes receivable from participants.

Master Trust (Tables)

12 Months Ended

Dec. 31, 2025

The following table presents the net assets in the Master Trust.


	December 31, 2025				December 31, 2024
(In thousands)	Plan		Master Trust		Plan		Master Trust
Legacy Enviri common stock	$	3,303	$	8,925	$	1,532	$	4,208
Money market mutual fund	69		186		32		89
Total	$	3,372	$	9,111	$	1,564	$	4,297

The changes in net assets of the Master Trust for the year ended December 31, 2025 consist of the following:


(In thousands)	Plan		Master Trust


Net investment income (loss)	$	1,914	$	5,318
Net transfers in (out)	(106)		(504)
Net increase (decrease) in assets	1,808		4,814
Net assets:
Beginning of year	1,564		4,297
End of year	$	3,372	$	9,111

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

- Definition

Tabular disclosure of master trust arrangement in which employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) participates.

+ References + Details

Tax Status	12 Months Ended
Dec. 31, 2025
EBP 224
EBP, Tax Status [Line Items]
Tax Status	Tax StatusThe IRS has determined and informed the Company by a letter dated July 23, 2018, that the Plan and related trust are designed in accordance with applicable sections of the IRC. Although the Plan has been amended since receiving the opinion letter, the Plan Administrator believes that the Plan is designed, and is currently being operated, in compliance with the applicable requirements of the IRC and therefore believes that the Plan is qualified, and the related trust is tax-exempt. U.S. GAAP requires Plan management to evaluate tax positions taken by the Plan and recognize a tax liability if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the IRS. The Plan Administrator has analyzed the tax positions by the Plan and has concluded that, as of December 31, 2025, there are no uncertain positions taken or expected to be taken that would require recognition of a liability or disclosure in the financial statements. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress.

Master Trust - Narrative (Details)	Dec. 31, 2025	Dec. 31, 2024
EBP 224
EBP, Master Trust [Line Items]
Interest in Master Trust, percentage	37.01%	36.40%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Summary of Significant Accounting Policies (Details) - EBP 224 - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jun. 01, 2026	Dec. 31, 2025	Dec. 31, 2024
EBP, Accounting Policy [Line Items]
Commission on purchase or sale paid by participant (per share)		$ 0.02
Forfeitures used to offset employer contributions		$ 339
Forfeitures used to pay Plan expenses		35
Unallocated forfeitures		$ 147	$ 133
Subsequent Event
EBP, Accounting Policy [Line Items]
Separation Agreement, vested percentage for Clean Earth employees	100.00%

Master Trust - Schedule of Net Investment Gain (Details) - EBP 224 $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
EBP, Master Trust [Line Items]
Net increase (decrease) in assets	$ 13,850
Net assets:
Net assets available for benefits at beginning of year	82,497
Net assets available for benefits at end of year	93,964
Plan
EBP, Master Trust [Line Items]
Net investment income (loss)	1,914
Net transfers in (out)	(106)
Net increase (decrease) in assets	1,808
Net assets:
Net assets available for benefits at beginning of year	1,564
Net assets available for benefits at end of year	3,372
Master Trust
EBP, Master Trust [Line Items]
Net investment income (loss)	5,318
Net transfers in (out)	(504)
Net increase (decrease) in assets	4,814
Net assets:
Net assets available for benefits at beginning of year	4,297
Net assets available for benefits at end of year	$ 9,111

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Amount of asset less liability available to pay benefit of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, aggregation of participants' individual account balances.

+ References

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+ Details

Related-Party and Party In Interest Transactions (Details) - EBP 224 $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Administrative expenses	$ 222
Interest income on notes receivable from participants	170
Legacy Enviri common stock
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Value of common stock purchased	133
Value of common stock sold	238
EBP, Trustee
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Administrative expenses	$ 160

Schedule H, Line 4i – Schedule of Assets (Held At End of Year)

12 Months Ended

Dec. 31, 2025

EBP 224

EBP, Schedule of Asset Held for Investment [Line Items]

Schedule H, Line 4i – Schedule of Assets (Held At End of Year)

SUPPLEMENTAL SCHEDULE

ENVIRI CORPORATION SAVINGS PLAN

SCHEDULE H, LINE 4(i) - FORM 5500

SCHEDULE OF ASSETS (HELD AT END OF YEAR)

EMPLOYER IDENTIFICATION NUMBER - 23-1483991

THREE-DIGIT PLAN NUMBER - 224

AS OF DECEMBER 31, 2025

(a)

(b) Identity of issue, borrower, lessor or similar party

(d) Cost

(e) Current value
in thousands

Investments in Master Trust

Master trust

3,372

Allspring Government Money Market Fund

Mutual fund

3,221

BlackRock Total Return Fund

Mutual fund

379

Dodge & Cox Stock Fund

Mutual fund

2,723

DWS RREEF Real Assets Fund

Mutual fund

EuroPacific Growth Fund

Mutual fund

1,704

JPMorgan Large Cap Growth Fund

Mutual fund

347

Loomis Sayles Global Bond Fund

Mutual fund

New York Life Investments Winslow Large Cap Growth Fund

Mutual fund

9,588

MFS Mid Cap Growth Fund

Mutual fund

361

Neuberger Berman Genesis Fund

Mutual fund

1,086

Principal Investors Fund Inc - Real Estate Securities Fund

Mutual fund

536

T Rowe Price Retirement 2005 Fund

Mutual fund

444

T Rowe Price Retirement 2010 Fund

Mutual fund

225

T Rowe Price Retirement 2015 Fund

Mutual fund

289

T Rowe Price Retirement 2020 Fund

Mutual fund

1,856

T Rowe Price Retirement 2025 Fund

Mutual fund

7,840

T Rowe Price Retirement 2030 Fund

Mutual fund

6,959

T Rowe Price Retirement 2035 Fund

Mutual fund

11,116

T Rowe Price Retirement 2040 Fund

Mutual fund

7,181

T Rowe Price Retirement 2045 Fund

Mutual fund

5,614

T Rowe Price Retirement 2050 Fund

Mutual fund

4,679

T Rowe Price Retirement 2055 Fund

Mutual fund

6,709

T Rowe Price Retirement 2060 Fund

Mutual fund

2,715

T Rowe Price Retirement 2065 Fund

Mutual fund

2,336

T Rowe Price Retirement 2070 Fund

Mutual fund

Vanguard Extended Market Index Fund

Mutual fund

171

Vanguard Inflation-Protected Securities Fund

Mutual fund

180

Vanguard Institutional Index Fund

Mutual fund

8,624

Vanguard Mid-Cap Value Index Fund/Open-end Fund

Mutual fund

360

Vanguard Total Bond Market Index Fund

Mutual fund

682

Vanguard Total International Stock Index Fund

Mutual fund

156

Total mutual funds

88,118

Notes receivable from participants - Interest at 4.25% to 9.50%, fully secured by vested benefits, due 2026 to 2040

Participant loans

2,399

93,889

* Party in interest.

** Cost information is not presented because investments are participant directed.

Statements of Net Assets Available for Benefits - EBP 224 - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Investments
Investments, at fair value	$ 88,118	$ 78,826
Plan interest in Master Trust	3,372	1,564
Total investments	91,490	80,390
Receivables:
Employer contributions	39	31
Participant contributions	36	0
Notes receivable from participants	2,399	2,076
Total receivables	2,474	2,107
Net assets available for benefits	$ 93,964	$ 82,497

Plan Description	12 Months Ended
Plan Description	Dec. 31, 2025
EBP 224
EBP, Description of Plan [Line Items]
Plan Description	Plan Description The following description of the Enviri Corporation Savings Plan (the "Plan") provides only an abbreviated summary of the general provisions of the Plan. Participants should refer to the Summary Plan Description and the Plan document for a more complete description of the Plan's provisions. General The Plan is a defined contribution plan providing retirement benefits to eligible employees. The Plan is designed to comply with the requirements of the Employee Retirement Income Security Act of 1974, ("ERISA"), as amended, and with the requirements for qualification under Sections 401(a) and 401(k) of the Internal Revenue Code ("IRC"). All U.S. employees, except those who are eligible to participate in the Enviri Corporation Retirement Savings and Investment Plan (the "RSIP") who are employed by Enviri LLC, the successor to Legacy Enviri following the completion of the Spin-Off, each as defined below, (the "Company") or any subsidiary of either the Company or a subsidiary which adopts the Plan with the approval of the Company, are deemed "Eligible Employees.” Throughout the year, employees may be transferred to various positions within the Company, which may result in a transfer between various retirement plans sponsored by the Company. Transfers between various Company retirement plans may also occur as Plan amendments are adopted to permit additional or restrict existing groups of Company employees participating in the Plan. These are shown as “Net transfers in (out) due to employee classification change” on the Statement of Changes in Net Assets Available for Benefits. Contributions New Eligible Employees are automatically enrolled in the Plan at a pre-tax savings rate of 3% via payroll deductions, with contributions being directed to a designated target date fund based on the participant's current age and a retirement age of 65. Employees have the option to opt out of this Plan or to contribute an amount different than the automatic contribution amount, and/or to invest in funds other than the Plan's default fund that are available within the Plan investment options. Participants not benefiting from the full employer match will be enrolled in an auto-increase of 1% annually in January until the participant meets the percentage to receive the full employer match. Employees have the option to opt out of this auto-increase. Participants may contribute up to 75% of their annual compensation received as an employee, as defined in the Plan and subject to IRC limitations. Participant contributions may be made on a pretax basis, or participants may elect to make contributions on an after-tax basis or on an after-tax "Roth" basis, subject to limitations outlined in the Plan. Participants who are at least age 50 may make an additional "catch-up" contribution subject to IRC limitations. Participants may also contribute funds from another qualified retirement plan ("rollover" contributions), subject to certain requirements. The Company makes matching contributions equal to 50% of the first 6% of a participant's contributions. The Company may also make discretionary contributions, also referred to as profit sharing contributions, to the Plan under agreements with certain employee bargaining groups. These contributions may be based on a percentage of employee earnings or a fixed amount per hour worked by the employee. The Company makes annual contributions based on certain union agreement requirements. For the Plan year ended December 31, 2025, the Company made a profit sharing contribution of $24 thousand. Participant Accounts Each participant's account is credited with the participant's contributions, employer matching contributions and profit sharing contributions, as well as Plan earnings. Participant accounts are charged with an allocation of administrative expenses that are paid by the Plan. Allocations are based on participant earnings, account balances, or specific transactions, as defined in the Plan document. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account. Vesting Participants are immediately vested in their contributions, plus actual earnings thereon. The participants are 100% vested upon death, disability or the attainment of normal retirement age. Contributions made by the Company vest on a pro-rata basis over three years. Prior to January 1, 2024, employer matching contributions were subject to a three year cliff vesting schedule and employer matching contributions made previously through December 31, 2023 will continue to vest under the three-year cliff vesting schedule. Notes Receivable from Participants Participants may borrow from their fund accounts a minimum of $500 to a maximum of 50% of their vested account balance, not to exceed $50 thousand. A loan is collateralized by the balance in the participant's account and bears interest at a rate commensurate with local prevailing rates as determined periodically by the Plan Administrator. The participant may choose the loan repayment period, not to exceed five years. However, the term may be for any period not to exceed 15 years if the purpose of the loan is to acquire the participant's principal residence. No more than one loan may be outstanding at any time. Interest rates on outstanding loans, based on the prime rate plus one percent, ranged from 4.25% to 9.50% at December 31, 2025, with maturity dates ranging from 2026 to 2040. Principal and interest is paid ratably through payroll deductions. Payment of Benefits On termination of service, a participant or beneficiary may receive payments based on their election of one of three options: a lump-sum amount equal to the value of the participant's vested interest in their account; a portion paid in a lump-sum, and the remainder paid later; or over annual installments, not to exceed more than 15 years. A participant may also request a withdrawal upon attainment of age 59 1/2 or upon demonstration by the participant to the Plan Administrator that the participant is suffering from "hardship," as defined in the Plan document. A participant may also request a withdrawal from after-tax and rollover funds at any time.

Plan Description (Details) - EBP 224	12 Months Ended
Plan Description (Details) - EBP 224	Dec. 31, 2025 USD ($) year
EBP, Description of Plan [Line Items]
Automatic deferral rate	3.00%
Retirement age \| year	65
Automatic deferral rate, annual increase	1.00%
Pretax, maximum annual compensation to total compensation, percentage	75.00%
Matching percentage	50.00%
Participant compensation matched, percentage	6.00%
Profit sharing contribution	$ 24,000
Vesting period	3 years
Minimum borrowing, amount	$ 500
Maximum borrowing, to total account, percentage	50.00%
Maximum borrowing, amount	$ 50,000
General loan, borrowing term	5 years
Primary residence, repayment term	15 years
Basis spread on variable rate	1.00%
Minimum
EBP, Description of Plan [Line Items]
Interest rate	4.25%
Maximum
EBP, Description of Plan [Line Items]
Interest rate	9.50%

Summary of Significant Accounting Policies (Policies) - EBP 224	12 Months Ended
	Dec. 31, 2025
EBP, Accounting Policy [Line Items]
Basis of Accounting	Basis of Accounting The financial statements of the Plan are prepared under the accrual basis of accounting in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP").
Administration	Administration Plan participants pay investment management, recordkeeping and audit fees related to maintaining the Plan as a whole. Loan setup fees and withdrawal fees are paid by the participant. Purchases and sales of common stock held by the Master Trust (as defined below) are assessed a commission, which is paid by the participant, at $0.02 per share. Investment related expenses are included in Net appreciation (depreciation) in fair value of investments on the Statement of Changes in Net Assets Available for Benefits.
Investment Valuation and Income Recognition	Investment Valuation and Income Recognition Investments are reported at fair value, which is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price).The Plan's Investment Committee determines the Plan's investment options utilizing information provided by the investment advisers and custodians. See Note 4, Fair Value Measurements. Purchases and sales of investments are recorded on a trade-date basis. Dividend income is recorded on the ex-dividend date. Net appreciation (depreciation) in the fair value of investments includes the Plan's gains and losses on investments bought and sold, as well as unrealized gain and losses on investments held at year-end.
Contributions and Forfeitures	Contributions Participant contributions are recorded in the year in which they are withheld from compensation. Employer matching contributions are recorded in the same year that the related participant contribution is recorded. Profit sharing contributions are typically recorded as Receivables from employer contributions due to the timing difference in determining the annual amount to be paid. Forfeitures Forfeitures, which are a result of participant withdrawals prior to their full vesting in the Plan, are used to reduce the amount of future employer contributions, pay plan expenses or restore accounts, as directed by the Plan Administrator.
Notes Receivable from Participants	Notes Receivable from Participants Notes receivable from participants are measured at their unpaid principal balance, plus any accrued but unpaid interest. Delinquent participant loans are reclassified as distributions based upon the terms of the Plan document.
Payment of Benefits	Payment of Benefits Benefit payments to participants are recorded when paid.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of additions and deductions during the reporting period. Actual results could differ from those estimates.
Subsequent Events	Subsequent Events On November 20, 2025, Enviri Corporation (“Legacy Enviri”) entered into definitive agreements with Veolia Environnement S.A. (“Veolia”), to (i) sell Legacy Enviri’s “Clean Earth” business (the “Clean Earth Business”), and (ii) distribute Legacy Enviri’s “Harsco Environmental” and “Rail” businesses (together, the “New Enviri Business”). On June 1, 2026, pursuant to the terms of a Separation Agreement, dated as of November 20, 2025 (the “Separation Agreement”), by and among Legacy Enviri, CLEH, Inc. (“CLEH”), the Company, which, prior to the Reorganization (as defined below), was a direct, wholly owned subsidiary of CLEH, Veolia, and Enviri II Corporation (“New Enviri”), which, prior to the Holding Company Merger (as defined below), was a direct, wholly owned subsidiary of Legacy Enviri, the following transactions occurred: (i) Legacy Enviri merged with and into the Company, with the Company as the surviving entity (the “Holding Company Merger”); (ii) CLEH and its subsidiaries, including the Company and New Enviri, effected a reorganization (the “Reorganization”) resulting in (a) CLEH holding the Clean Earth Business, (b) New Enviri owning all of the equity interests of the Company, and (c) the Company holding the New Enviri Business; and (iii) CLEH distributed all of the outstanding shares of New Enviri common stock to the stockholders of CLEH, including the Master Trust, on a pro rata basis (the “Distribution” and, together with the Reorganization, the “Spin-Off”). Immediately following the Spin-Off, CLEH merged with a merger subsidiary of Veolia, with CLEH surviving as an indirect, wholly owned subsidiary of Veolia. Stockholders of CLEH, including the Master Trust, received cash in exchange for the cancellation of their shares of CLEH common stock. Shortly thereafter, New Enviri changed its name from “Enviri II Corporation” to “Enviri Corporation.” Following the completion of the transactions described above, the Company, as the successor to Legacy Enviri and a wholly owned subsidiary of New Enviri, a new publicly traded corporation listed on the New York Stock Exchange, will continue to operate the Plan. The common stock held by the Master Trust will, however, consist of New Enviri common stock rather than Legacy Enviri common stock as a result of the Holding Company Merger and the Spin-Off. In addition, as a result of the Separation Agreement, a participant who is a Clean Earth employee became 100% vested in the participant's account balance upon completion of the transactions described above.

Fair Value Measurements

12 Months Ended

Dec. 31, 2025

EBP 224

EBP, Investment, Fair Value and NAV [Line Items]

Fair Value Measurements

The fair value framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below:

Level 1 Inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Plan has the ability to access.

Level 2 Inputs to the valuation methodology include:

•Quoted prices for similar assets or liabilities in active markets;

•Quoted prices for identical or similar assets or liabilities in inactive markets;

•Inputs other than quoted prices that are observable for the asset or liability; and

•Inputs that are derived principally from or corroborated by observable market data by correlation or other means.

If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability.

Level 3 Inputs to the valuation methodology are unobservable and significant to the fair value measurement.

The asset's or liability's fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The Plan primarily applies the market approach for fair value measurements and endeavors to utilize the best available information. Accordingly, the Plan utilizes valuation techniques that maximize the use of observable inputs, such as quoted prices in active markets, and minimize the use of unobservable inputs. The Plan is able to classify fair value balances based on the observability of those inputs. Common stock is valued at the closing price reported on the active market on which the individual security is traded. Investments in mutual funds are primarily valued at net asset value in an exchange and active market, which represents the net asset values of shares held by the Plan at year-end.

The Plan recognizes the methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. While the Plan believes its valuation methods are appropriate and consistent with other market participants' expectations for the Plan's investments, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement. There have been no significant changes in the valuation methodologies or transfers between levels during the years ended December 31, 2025 and 2024.

At December 31, 2025 and 2024, the Plan's investment that are not included in the Master Trust are mutual funds and are classified within Level 1 of the fair value hierarchy, due to the fact that the inputs to the

valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Plan has the ability to access.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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+ Details

- Definition

The entire disclosure for fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

+ References

+ Details

Master Trust

12 Months Ended

Dec. 31, 2025

EBP 224

EBP, Master Trust [Line Items]

Master Trust

A portion of the Plan's investments are in a Stock Fund (the "Master Trust"), which was established by Legacy Enviri for the investment of assets of the Plan and another retirement plan sponsored by Legacy Enviri. Each participating retirement plan has an undivided interest in the Master Trust. The assets of the Master Trust are held by the trustee, custodian and recordkeeper, Principal Bank, a subsidiary of Principal Financial Group. The value of the Plan's interest in the Master Trust is based on the beginning of the year value of the Plan's interest in the Master Trust, plus actual contributions received and allocated investment income (losses) recognized during the year, less actual distributions and allocated administrative expenses paid during the year. At December 31, 2025 and 2024, the Plan's interest in the net assets of the Master Trust was 37.01% and 36.40%, respectively. Net investment income (loss) and administrative expenses relating to the Master Trust are allocated to the individual plans based upon the amount of time each of the plan's assets were invested in the Master Trust.

The following table presents the net assets in the Master Trust.


	December 31, 2025				December 31, 2024
(In thousands)	Plan		Master Trust		Plan		Master Trust
Legacy Enviri common stock	$	3,303	$	8,925	$	1,532	$	4,208
Money market mutual fund	69		186		32		89
Total	$	3,372	$	9,111	$	1,564	$	4,297

The changes in net assets of the Master Trust for the year ended December 31, 2025 consist of the following:


(In thousands)	Plan		Master Trust


Net investment income (loss)	$	1,914	$	5,318
Net transfers in (out)	(106)		(504)
Net increase (decrease) in assets	1,808		4,814
Net assets:
Beginning of year	1,564		4,297
End of year	$	3,372	$	9,111

At December 31, 2025 and 2024, all assets of the Master Trust are classified within Level 1 of the fair value hierarchy discussed in Note 4, due to the fact that the inputs to the valuation methodology are unadjusted quoted prices for identical assets or liabilities in active markets that the Plan has the ability to access.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

The entire disclosure for master trust arrangement in which employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) participates.

+ References

+ Details

Statement of Changes in Net Assets Available for Benefits - EBP 224 $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
Contributions:
Participants	$ 7,985
Employer	2,854
Rollovers	669
Total contributions	11,508
Interest income on notes receivable from participants	170
Investment income (loss):
Net appreciation (depreciation) in fair value of investments	6,752
Net appreciation (depreciation) in Plan interest in Master Trust (Note 3)	1,914
Dividend income	5,184
Total net investment income (loss)	13,850
Total additions	25,528
Deductions:
Benefits paid to participants	12,324
Administrative expenses	222
Total deductions	12,546
Net increase (decrease)	12,982
Net transfers in (out) due to employee classification change (Note 1)	(1,515)
Net assets available for benefits at beginning of year	82,497
Net assets available for benefits at end of year	$ 93,964

Master Trust - Schedule of Master Trust Net Assets (Details) - EBP 224 - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
EBP, Master Trust [Line Items]
Investments, fair value	$ 91,490	$ 80,390
Net assets	93,964	82,497
Plan
EBP, Master Trust [Line Items]
Net assets	3,372	1,564
Plan \| Legacy Enviri common stock
EBP, Master Trust [Line Items]
Investments, fair value	3,303	1,532
Plan \| Money market mutual fund
EBP, Master Trust [Line Items]
Investments, fair value	69	32
Master Trust
EBP, Master Trust [Line Items]
Net assets	9,111	4,297
Master Trust \| Legacy Enviri common stock
EBP, Master Trust [Line Items]
Investments, fair value	8,925	4,208
Master Trust \| Money market mutual fund
EBP, Master Trust [Line Items]
Investments, fair value	$ 186	$ 89

- Definition

Fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

+ References

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Summary of Significant Accounting Policies	12 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2025
EBP 224
EBP, Accounting Policy [Line Items]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Accounting The financial statements of the Plan are prepared under the accrual basis of accounting in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP"). Administration Plan participants pay investment management, recordkeeping and audit fees related to maintaining the Plan as a whole. Loan setup fees and withdrawal fees are paid by the participant. Purchases and sales of common stock held by the Master Trust (as defined below) are assessed a commission, which is paid by the participant, at $0.02 per share. Investment related expenses are included in Net appreciation (depreciation) in fair value of investments on the Statement of Changes in Net Assets Available for Benefits. Investment Valuation and Income Recognition Investments are reported at fair value, which is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price).The Plan's Investment Committee determines the Plan's investment options utilizing information provided by the investment advisers and custodians. See Note 4, Fair Value Measurements. Purchases and sales of investments are recorded on a trade-date basis. Dividend income is recorded on the ex-dividend date. Net appreciation (depreciation) in the fair value of investments includes the Plan's gains and losses on investments bought and sold, as well as unrealized gain and losses on investments held at year-end. Contributions Participant contributions are recorded in the year in which they are withheld from compensation. Employer matching contributions are recorded in the same year that the related participant contribution is recorded. Profit sharing contributions are typically recorded as Receivables from employer contributions due to the timing difference in determining the annual amount to be paid. Notes Receivable from Participants Notes receivable from participants are measured at their unpaid principal balance, plus any accrued but unpaid interest. Delinquent participant loans are reclassified as distributions based upon the terms of the Plan document. Payment of Benefits Benefit payments to participants are recorded when paid. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of additions and deductions during the reporting period. Actual results could differ from those estimates. Forfeitures Forfeitures, which are a result of participant withdrawals prior to their full vesting in the Plan, are used to reduce the amount of future employer contributions, pay plan expenses or restore accounts, as directed by the Plan Administrator. In 2025, $339 thousand of forfeitures were used to offset employer contributions and $35 thousand of forfeitures were used to pay Plan expenses. Unallocated forfeitures at December 31, 2025 and 2024 were $147 thousand and $133 thousand, respectively. Subsequent Events On November 20, 2025, Enviri Corporation (“Legacy Enviri”) entered into definitive agreements with Veolia Environnement S.A. (“Veolia”), to (i) sell Legacy Enviri’s “Clean Earth” business (the “Clean Earth Business”), and (ii) distribute Legacy Enviri’s “Harsco Environmental” and “Rail” businesses (together, the “New Enviri Business”). On June 1, 2026, pursuant to the terms of a Separation Agreement, dated as of November 20, 2025 (the “Separation Agreement”), by and among Legacy Enviri, CLEH, Inc. (“CLEH”), the Company, which, prior to the Reorganization (as defined below), was a direct, wholly owned subsidiary of CLEH, Veolia, and Enviri II Corporation (“New Enviri”), which, prior to the Holding Company Merger (as defined below), was a direct, wholly owned subsidiary of Legacy Enviri, the following transactions occurred: (i) Legacy Enviri merged with and into the Company, with the Company as the surviving entity (the “Holding Company Merger”); (ii) CLEH and its subsidiaries, including the Company and New Enviri, effected a reorganization (the “Reorganization”) resulting in (a) CLEH holding the Clean Earth Business, (b) New Enviri owning all of the equity interests of the Company, and (c) the Company holding the New Enviri Business; and (iii) CLEH distributed all of the outstanding shares of New Enviri common stock to the stockholders of CLEH, including the Master Trust, on a pro rata basis (the “Distribution” and, together with the Reorganization, the “Spin-Off”). Immediately following the Spin-Off, CLEH merged with a merger subsidiary of Veolia, with CLEH surviving as an indirect, wholly owned subsidiary of Veolia. Stockholders of CLEH, including the Master Trust, received cash in exchange for the cancellation of their shares of CLEH common stock. Shortly thereafter, New Enviri changed its name from “Enviri II Corporation” to “Enviri Corporation.” Following the completion of the transactions described above, the Company, as the successor to Legacy Enviri and a wholly owned subsidiary of New Enviri, a new publicly traded corporation listed on the New York Stock Exchange, will continue to operate the Plan. The common stock held by the Master Trust will, however, consist of New Enviri common stock rather than Legacy Enviri common stock as a result of the Holding Company Merger and the Spin-Off. In addition, as a result of the Separation Agreement, a participant who is a Clean Earth employee became 100% vested in the participant's account balance upon completion of the transactions described above.

Schedule H, Line 4i – Schedule of Assets (Held At End of Year) (Details) - EBP 224 $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]
Entity tax identification number	23-1483991
Plan number	224
Investments in Master Trust	$ 3,372
Current Value of Investments	88,118
Notes receivable from participants	2,399
Asset held for investment	$ 93,889
Minimum
EBP, Schedule of Asset Held for Investment [Line Items]
Interest rate	4.25%
Maximum
EBP, Schedule of Asset Held for Investment [Line Items]
Interest rate	9.50%
Investment, Identifier [Axis]: Allspring Government Money Market Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	$ 3,221
Investment, Identifier [Axis]: BlackRock Total Return Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	379
Investment, Identifier [Axis]: DWS RREEF Real Assets Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	5
Investment, Identifier [Axis]: Dodge & Cox Stock Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	2,723
Investment, Identifier [Axis]: EuroPacific Growth Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	1,704
Investment, Identifier [Axis]: JPMorgan Large Cap Growth Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	347
Investment, Identifier [Axis]: Loomis Sayles Global Bond Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	16
Investment, Identifier [Axis]: MFS Mid Cap Growth Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	361
Investment, Identifier [Axis]: Neuberger Berman Genesis Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	1,086
Investment, Identifier [Axis]: New York Life Investments Winslow Large Cap Growth Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	9,588
Investment, Identifier [Axis]: Principal Investors Fund Inc - Real Estate Securities Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	536
Investment, Identifier [Axis]: T Rowe Price Retirement 2005 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	444
Investment, Identifier [Axis]: T Rowe Price Retirement 2010 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	225
Investment, Identifier [Axis]: T Rowe Price Retirement 2015 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	289
Investment, Identifier [Axis]: T Rowe Price Retirement 2020 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	1,856
Investment, Identifier [Axis]: T Rowe Price Retirement 2025 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	7,840
Investment, Identifier [Axis]: T Rowe Price Retirement 2030 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	6,959
Investment, Identifier [Axis]: T Rowe Price Retirement 2035 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	11,116
Investment, Identifier [Axis]: T Rowe Price Retirement 2040 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	7,181
Investment, Identifier [Axis]: T Rowe Price Retirement 2045 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	5,614
Investment, Identifier [Axis]: T Rowe Price Retirement 2050 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	4,679
Investment, Identifier [Axis]: T Rowe Price Retirement 2055 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	6,709
Investment, Identifier [Axis]: T Rowe Price Retirement 2060 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	2,715
Investment, Identifier [Axis]: T Rowe Price Retirement 2065 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	2,336
Investment, Identifier [Axis]: T Rowe Price Retirement 2070 Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	16
Investment, Identifier [Axis]: Vanguard Extended Market Index Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	171
Investment, Identifier [Axis]: Vanguard Inflation-Protected Securities Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	180
Investment, Identifier [Axis]: Vanguard Institutional Index Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	8,624
Investment, Identifier [Axis]: Vanguard Mid-Cap Value Index Fund/Open-end Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	360
Investment, Identifier [Axis]: Vanguard Total Bond Market Index Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	682
Investment, Identifier [Axis]: Vanguard Total International Stock Index Fund \| Mutual fund
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value of Investments	$ 156

Cover	12 Months Ended
Cover	Dec. 31, 2025
Document Information [Line Items]
Document Type	11-K
Entity Registrant Name	ENVIRI CORP
Amendment Flag	false
Entity Central Index Key	0002104052
EBP 224
Document Information [Line Items]
Document Type	11-K
Entity Registrant Name	ENVIRI CORP
Amendment Flag	false
Entity Central Index Key	0002104052

Risks and Uncertainties	12 Months Ended
Risks and Uncertainties	Dec. 31, 2025
EBP 224
EBP, Risk and Uncertainty [Line Items]
Risks and Uncertainties	Risks and Uncertainties The Plan invests in various investment securities. Investment securities are exposed to various risks, such as interest rate, market, and credit risks. Market risks include global events which could impact the value of investment securities. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants' account balances and the amounts reported in the statements of net assets available for benefits.