Exhibit 99.1 Investor Contact Media Contact David Martin Karen Tognarelli +1.267.946.1407 +1.717.480.6145 dmartin@enviri.com ktognarelli@enviri.com FOR IMMEDIATE RELEASE • Third quarter revenues totaled $574 million; organic growth in the quarter was 1% • Q3 GAAP operating income of $37 million • Adjusted EBITDA in Q3 totaled $85 million, an increase of 3% over the prior-year quarter • Completed sale of Reed Minerals, enabling Company to surpass 2024 asset sales goal of $50 to $75 million • Refinanced revol ...