X0202 SCHEDULE 13D/A 0001104659-25-117433 0001009268 XXXXXXXX LIVE 1 Common stock, par value $1.25 per share 06/01/2026 true 0000045876 415864107 Enviri Corporation

Two Logan Square 100-120 North 18th Street, 17th Floor Philadelphia PA 19103

D. E. Shaw & Co., L.P. 212-478-0000 Legal & Compliance, Two Manhattan West 375 Ninth Ave., 52nd Floor New York NY 10001 0001009268 N D. E. Shaw & Co., L.P. AF Y DE 0.00 0.00 0.00 0.00 0.00 N 0 IA PN 0001277502 N D. E. Shaw & Co., L.L.C. AF N DE 0.00 0.00 0.00 0.00 0.00 N 0 OO 0001023870 N David E. Shaw AF N X1 0.00 0.00 0.00 0.00 0.00 N 0 IN Common stock, par value $1.25 per share Enviri Corporation Two Logan Square 100-120 North 18th Street, 17th Floor Philadelphia PA 19103 Introductory Note: This Amendment No. 1 to Schedule 13D ("Amendment No. 1") is filed by and on behalf of each of the Reporting Persons to amend and supplement the Schedule 13D related to the common stock, par value $1.25 per share (the "Shares"), of Enviri Corporation (the "Issuer") previously filed by the Reporting Persons with the Securities and Exchange Commission (the "SEC") on December 1, 2025 (the "Initial Schedule 13D"). Each capitalized term used and not defined herein shall have the meaning assigned to such term in the Initial Schedule 13D. Except as provided herein, each Item of the Initial Schedule 13D remains unchanged. Item 4 of the Initial Schedule 13D is hereby amended and supplemented as follows: On June 1, 2026, Enviri LLC (CIK: 0000045876), as successor by merger to the Issuer, filed a Form 8-K with the SEC disclosing, among other things, the consummation of the separation and sale to the Buyer of the Issuer's "Clean Energy" business through a series of transactions (collectively, the "Transactions"). Upon consummation of the Transactions, for every three Shares held and exchanged by the Reporting Persons, the Reporting Persons received one share of common stock, par value $0.00001 per share, of Enviri II Corporation, a Delaware corporation (CIK: 0002104052). Item 5(a) of the Initial Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 4 of Amendment No. 1 is incorporated herein by reference. Following the consummation of the Transactions, none of the Reporting Persons beneficially owns any Shares. Item 5(b) of the Initial Schedule 13D is hereby amended and supplemented as follows: See Item 5(a) of Amendment No. 1 to the Initial Schedule 13D. Item 5(c) of the Initial Schedule 13D is hereby amended and supplemented as follows: Schedule I to Amendment No. 1, which is incorporated by reference into this Item 5(c) as if restated in full herein, describes all of the transactions in Shares by the Reporting Persons and/or any affiliates of the Reporting Persons during the past sixty (60) days. Item 5(d) of the Initial Schedule 13D is hereby amended and supplemented as follows: The information set forth in Item 4 of Amendment No. 1 is incorporated herein by reference. Following the consummation of the Transactions, none of the Reporting Persons beneficially owns any Shares. Item 5(e) of the Initial Schedule 13D is hereby amended and restated in its entirety as follows: The information set forth in Item 4 of Amendment No. 1 is incorporated herein by reference. On June 1, 2026, following the consummation of the Transactions, the Reporting Persons ceased to be the beneficial owners of more than five percent of the outstanding Shares. Item 6 of the Initial Schedule 13D is hereby amended and supplemented as follows: As of the date of this Amendment No. 1, none of the Reporting Persons has any contract, arrangement, understanding or relationship with any person with respect to any securities of the Issuer. Item 7 of the Initial Schedule 13D is hereby amended and restated in its entirety as follows: Exhibit 99.1 - Schedule I (Transactions in the Securities of the Issuer During the Past Sixty Days) Exhibit 99.2 - Power of Attorney, granted by David E. Shaw relating to D. E. Shaw & Co., Inc., in favor of the signatories hereto, among others, dated August 1, 2024. Exhibit 99.3 - Power of Attorney, granted by David E. Shaw relating to D. E. Shaw & Co. II, Inc., in favor of the signatories hereto, among others, dated August 1, 2024. Exhibit 99.4 - Joint Filing Agreement, by and among the Reporting Persons, dated June 3, 2026. D. E. Shaw & Co., L.P. /s/ Daniel R. Marcus 06/03/2026 D. E. Shaw & Co., L.L.C. /s/ Daniel R. Marcus 06/03/2026 David E. Shaw /s/ Daniel R. Marcus 06/03/2026