Enviri Corporation is providing supplemental information to its definitive proxy statement filed on April 3, 2026, regarding the sale of its Clean Earth business to Veolia Environnement S.A. The supplement addresses allegations from shareholder lawsuits and demand letters claiming the original proxy statement omitted material information. Enviri maintains that the original disclosures were sufficient and denies all allegations of wrongdoing, but is providing this information to mitigate litigation risks and potential delays to the transaction. The supplemental disclosures include additional background on the merger process, details on the CEO search for 'New Enviri', and updated financial projections and valuation methodologies used by BofA Securities. The Special Meeting of stockholders remains scheduled for May 4, 2026, and the Board continues to recommend a vote in favor of the proposals.