ENVIRI Corp reports institutional ownership disclosure: Mason Capital Management LLC and affiliated reporting persons jointly report beneficial ownership of 4,509,778 shares of Common Stock, representing 5.5% of the class. The percent is calculated using 82,704,523 shares outstanding as of March 20, 2026.
The filing states Mason Capital Management exercises shared voting and dispositive power over those shares on behalf of Mason Capital Master Fund, and identifies Kenneth M. Garschina and Michael E. Martino as managing principals with shared voting and dispositive authority. Signatures accompany a joint filing agreement.
Positive
None.
Negative
None.
Insights
Mason Capital reports a 5.5% stake via shared authority.
The filing documents that Mason Capital Management LLC holds shared voting and dispositive power over 4,509,778 shares held by Mason Capital Master Fund. The 5.5% figure is tied to the company's stated outstanding share count of 82,704,523 as of March 20, 2026.
Interpretation depends on whether the stake is active for governance or passive for investment; subsequent filings could show changes. Cash‑flow treatment and any plans to buy or sell are not disclosed in the provided excerpt.
Key Figures
Shares owned:4,509,778 sharesPercent of class:5.5%Shares outstanding:82,704,523 shares
3 metrics
Shares owned4,509,778 sharesBeneficially owned by Mason Capital Master Fund as reported in Schedule 13G
Percent of class5.5%Calculated using shares outstanding as of March 20, 2026
Shares outstanding82,704,523 sharesShares outstanding as of March 20, 2026 from Definitive Proxy Statement
Key Terms
beneficial ownership, shared dispositive power, Mason Capital Master Fund
3 terms
beneficial ownershipregulatory
"The information required by Item 4(a) is set forth in Row 9 of the cover page"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
shared dispositive powerregulatory
"Shared Dispositive Power 4,509,778.00"
Mason Capital Master Fundother
"directly held by Mason Capital Master Fund, L.P., a Cayman Islands exempted limited partnership"
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
ENVIRI Corp
(Name of Issuer)
Common Stock, par value $1.25 per share
(Title of Class of Securities)
415864107
(CUSIP Number)
03/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
415864107
1
Names of Reporting Persons
MASON CAPITAL MANAGEMENT LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,509,778.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,509,778.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,509,778.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.5 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
415864107
1
Names of Reporting Persons
Kenneth M. Garschina
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,509,778.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,509,778.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,509,778.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.5 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
CUSIP Number(s):
415864107
1
Names of Reporting Persons
Michael E. Martino
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
4,509,778.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
4,509,778.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
4,509,778.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.5 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
ENVIRI Corp
(b)
Address of issuer's principal executive offices:
Two Logan Square, 100-120 North 18th Street, 17th Floor, Philadelphia, Pennsylvania 19103
Item 2.
(a)
Name of person filing:
This Schedule is being filed jointly by the following reporting persons (hereinafter sometimes collectively referred to as the "Reporting Persons"):
(i) Mason Capital Management LLC, a Delaware limited liability company ("Mason Capital Management"), with respect to the common stock ("Common Stock") of Enviri Corporation (the "Company") directly held by Mason Capital Master Fund, L.P., a Cayman Islands exempted limited partnership ("Mason Capital Master Fund"), the general partner of which is Mason Management LLC ("Mason Management");
(ii) Kenneth M. Garschina ("Mr. Garschina"), with respect to the shares of Common Stock directly held by Mason Capital Master Fund; and
(iii) Michael E. Martino ("Mr. Martino"), with respect to the shares of Common Stock directly held by Mason Capital Master Fund.
Mason Capital Management is the investment manager of Mason Capital Master Fund. Mason Capital Management may be deemed to have beneficial ownership over the shares of Common Stock directly held by Mason Capital Master Fund by virtue of the authority granted to Mason Capital Management by Mason Capital Master Fund and Mason Management to vote and exercise investment discretion over such shares. Mr. Garschina and Mr. Martino are managing principals of Mason Capital Management and the sole members of Mason Management.
The filing of this statement should not be construed as an admission that any Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, as amended, the beneficial owner of the shares of Common Stock reported herein.
(b)
Address or principal business office or, if none, residence:
The principal business office address of Mason Capital Management, Mr. Garschina and Mr. Martino is c/o Mason Capital Management LLC, 110 East 59th Street, New York, New York 10022.
(c)
Citizenship:
Mason Capital Management is a Delaware limited liability company. Messrs. Garschina and Martino are United States citizens.
(d)
Title of class of securities:
Common Stock, par value $1.25 per share
(e)
CUSIP Number(s):
415864107
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
The percentage set forth in this Schedule 13G is calculated based upon an aggregate of
82,704,523 shares of Common Stock outstanding as of March 20, 2026, as reported in the Company's Definitive Proxy Statement on Schedule 14A, filed with the Securities and Exchange Commission on April 3, 2026.
(b)
Percent of class:
5.5%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
See Item 2(a).
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
What stake does Mason Capital report in ENVIRI Corp (NVRI)?
Mason Capital reports beneficial ownership of 4,509,778 shares, representing 5.5% of ENVIRI Corp's common stock. This percentage uses 82,704,523 shares outstanding as of March 20, 2026 per the filing.
Who are the reporting persons on the Schedule 13G for NVRI?
The Schedule 13G is filed jointly by Mason Capital Management LLC, and individuals Kenneth M. Garschina and Michael E. Martino. They report shared voting and dispositive power over the disclosed shares.
Does the filing state Mason Capital has sole voting power over the shares?
No. The filing lists 0 shares with sole voting or sole dispositive power and reports 4,509,778 shares with shared voting and shared dispositive power for each reporting person.
What entity directly holds the shares reported by Mason Capital?
The shares are directly held by Mason Capital Master Fund, L.P., a Cayman Islands partnership, for which Mason Capital Management is the investment manager and Mason Management is the general partner.
How was the 5.5% ownership percentage calculated?
The percentage is calculated using an aggregate of 82,704,523 shares outstanding as of March 20, 2026, as reported in the Company's Definitive Proxy Statement on Schedule 14A.
