Q1 2025 Quarterly Results and Outlook Conference Call May 1, 2025 © 2025 Enviri Corporation. All Rights Reserved. This document and the information set forth herein are the property of Enviri Corporation. 1 ADMINISTRATIVE ITEMS More information on Enviri's quarterly earnings, including the Company's earnings press release issued today and this presentation, is available on the Investor Relations portion of Enviri's website. Company management will discuss the Company's financial performance during a confere ...

Exhibit 99.1 Investor Contact Media Contact +1.267.946.1407 +1.717.480.6145 David Martin Karen Tognarelli dmartin@enviri.com ktognarelli@enviri.com FOR IMMEDIATE RELEASE Enviri Corporation Reports First Quarter 2025 Results PHILADELPHIA (May 01, 2025) - Enviri Corporation (NYSE: NVRI) (the "Company") today reported first quarter 2025 results. Revenues in the first quarter of 2025 totaled $548 million, and on a U.S. GAAP ("GAAP") basis, the consolidated loss from continuing operations was $11 million. Q1 Adj ...

Core Insights - Enviri Corporation reported first quarter 2025 revenues of $548 million, a decrease of 9% compared to the same quarter in 2024, which had revenues of $600 million [4][6] - The company experienced a GAAP consolidated loss from continuing operations of $11 million in Q1 2025, an improvement from a loss of $16 million in Q1 2024 [4][6] - Adjusted EBITDA for Q1 2025 was $67 million, down from $78 million in the prior year, but exceeded the company's guidance of $57 million to $63 million [5][6] Financial Performance - The diluted loss per share from continuing operations on a GAAP basis was $0.15 in Q1 2025, compared to $0.21 in Q1 2024 [2][4] - Adjusted diluted loss per share from continuing operations was $0.18 in Q1 2025, significantly higher than the adjusted loss of $0.03 in the same quarter of 2024 [2][4] - The company reaffirmed its 2025 Adjusted EBITDA guidance range of $305 million to $325 million and free cash flow outlook of $30 million to $50 million [5][12] Segment Performance - Harsco Environmental reported revenues of $243 million in Q1 2025, down from $299 million in Q1 2024, with an adjusted EBITDA of $39 million compared to $49 million in the prior year [7][8] - Clean Earth achieved revenues of $235 million, a 4% increase from $226 million in Q1 2024, with adjusted EBITDA rising to $38 million from $34 million [8][9] - Harsco Rail's revenues decreased to $70 million from $75 million year-over-year, with an adjusted EBITDA loss of $2 million compared to a profit of $2 million in the prior year [9][10] Cash Flow and Outlook - Net cash provided by operating activities was $7 million in Q1 2025, an increase from $1 million in the prior year [11] - Adjusted free cash flow was $(13) million in Q1 2025, an improvement from $(17) million in Q1 2024 [11] - The company anticipates that economic conditions will remain stable for the remainder of 2025, despite elevated economic uncertainty [12][13]

Core Insights - Clean Earth, a division of Enviri Corporation, is enhancing its regulatory compliance services to better support clients in navigating complex regulatory landscapes [1][2] - The expansion includes comprehensive offerings such as reporting and compliance support, auditing and compliance assessments, and training [1][3] Service Offerings - Reporting & Compliance Support: Services include EPA ID application and modifications, Annual/Biennial Reporting, Clear Air Act Reporting, and Paying Agency Fees [3] - Auditing & Compliance Assessments: This includes state-specific inspection-ready assessments, manifest and paperwork audits, EHS Gap Analysis, and Operations and Systems Audits [3] - Training: Training programs cover DOT Hazmat, DOT IATA/IMDG, OSHA General Industry, RCRA, OSHA Hazcom, Laboratory Safety, and SPCC Training [3] Market Position - Clean Earth is positioning itself as a leading provider of comprehensive waste management solutions that extend beyond waste disposal, focusing on enhancing overall business operations for clients [2][3] - The company operates a network of 93 locations across the United States, providing a wide range of treatment, recycling, and sustainability services [4]

Corporate Governance - Stockholders approved the election of all eight nominees to the Board of Directors to serve until the 2026 Annual Meeting of Stockholders [1] - The Audit Committee's appointment of Deloitte as Independent Auditors for the year ending December 31, 2025 was ratified [1] Executive Compensation - Stockholders approved the compensation of the Company's named executive officers on an advisory basis [2] - Amendment No. 5 to the 2013 Equity and Incentive Compensation Plan was approved [2] - Amendment No. 3 to the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan was approved [2] - An amendment to the Company's Certificate of Incorporation to limit the liability of certain officers in accordance with recent Delaware law amendments was approved [2] Company Overview - Enviri is a global leader in providing a broad range of environmental services and innovative solutions [3] - The company offers critical recycle and reuse solutions for waste streams, helping customers address complex environmental challenges and achieve sustainability goals [3] - Enviri operates in more than 150 locations across over 30 countries [3]

Core Viewpoint - Harsco Rail, a division of Enviri Corporation, has appointed Gary Lada as the new president, effective May 5, 2025, succeeding Claus Heuschmid, who will leave the organization on June 1, 2025 [1][2]. Company Leadership Changes - Gary Lada is recognized for his extensive experience in the rail industry and operational excellence, previously holding key roles at GE Transportation and leading businesses at Ingersoll Rand [2][3]. - The leadership team at Harsco Rail has been further strengthened with the hiring of Barry Learner as chief financial officer and Mike Lafferty as vice president of operations [3]. Company Background - Enviri Corporation is a global leader in environmental services, operating in over 150 locations across more than 30 countries, focusing on recycling and sustainability solutions [4]. - Harsco Rail has over 100 years of experience as a global supplier of railway track maintenance services, providing engineering, equipment, and innovative technology from multiple locations worldwide [5].

Core Viewpoint - Enviri Corporation will release its first quarter 2025 earnings results on May 1, 2025, before the NYSE market opens, and will host a conference call that morning at 9:00 a.m. ET [1][3]. Company Overview - Enviri Corporation is a global leader in providing a wide range of environmental services and innovative solutions, focusing on recycling and reuse solutions for waste streams [3]. - The company operates in over 150 locations across more than 30 countries, helping customers address complex environmental challenges and achieve sustainability goals [3]. Conference Call Details - The conference call is scheduled for May 1, 2025, at 9:00 a.m. ET, with dial-in options available for both US and international participants [3]. - Listeners are encouraged to join the call approximately ten minutes early, and an archived version of the webcast will be available on the company's website [2].

Core Insights - Clean Earth, a division of Enviri Corporation, has deployed a new fleet of 132 Class 7 and Class 8 trucks designed to enhance safety, compliance, and customer service while reducing environmental impact [1][3] Fleet Features - The new fleet features an innovative modular design that allows for the integration of high-quality components, promoting sustainability by reusing cargo boxes that can last three times longer than the chassis [2] - The trucks are equipped with technology-driven advancements, including a mobile office system for on-site documentation, AI-powered cameras for real-time monitoring, and integrated climate control systems to ensure safe transport of regulated materials [3] Production and Commitment - Production of these new trucks began in 2024, with additional vehicles contracted for release starting this year, reflecting Clean Earth's commitment to continuous innovation and improvement in service capabilities [4] Company Overview - Clean Earth operates a network of 93 locations across the United States, providing a wide range of waste management and environmental services, from simple waste needs to complex environmental challenges [5]

Company Performance - Enviri (NVRI) closed at $6.75, reflecting a -0.15% change from the previous day, underperforming the S&P 500 which gained 0.08% [1] - Over the past month, Enviri's shares have depreciated by 10.58%, compared to a 9.22% loss in the Business Services sector and a 7.33% loss in the S&P 500 [1] Earnings Forecast - Enviri is expected to report an EPS of -$0.15, indicating a 400% decline from the same quarter last year [2] - The consensus estimate for quarterly revenue is $580.6 million, down 3.28% from the previous year [2] - For the entire year, the forecasted earnings are -$0.19 per share and revenue of $2.35 billion, reflecting changes of -171.43% and +0.31% respectively compared to the prior year [3] Analyst Estimates and Rankings - Recent changes in analyst estimates for Enviri are crucial as they reflect short-term business trends [4] - The Zacks Rank system, which ranges from 1 (Strong Buy) to 5 (Strong Sell), currently places Enviri at 3 (Hold) [6] - The Zacks Consensus EPS estimate has decreased by 371.43% in the past month [6] Industry Context - The Waste Removal Services industry, part of the Business Services sector, has a Zacks Industry Rank of 179, placing it in the bottom 29% of over 250 industries [7] - Research indicates that the top 50% rated industries outperform the bottom half by a factor of 2 to 1 [7]

Core Insights - Harsco Environmental has announced the opening of a new SteelPhalt plant in Murga, Basque Country, Spain, marking its first permanent asphalt plant outside the UK, aimed at expanding its global footprint and promoting sustainable practices in the asphalt industry [1][2][3] Company Developments - The new plant is set to host a grand opening event on March 19, 2025, and is designed to process over 195,000 tons of slag annually, producing more than 200,000 tons of sustainable asphalt products for regional roads [1][3] - The plant will contribute to the Basque Country's environmental goals as outlined in the Waste Prevention and Management Plan 2030 and the Circular Economy Strategy 2030 [2] Environmental Impact - The new facility is expected to reduce the carbon footprint of road construction materials by up to 50%, showcasing the company's commitment to innovation and addressing critical environmental challenges [4] - SteelPhalt offers a circular economy solution for steel industry byproducts, producing high-quality asphalt without the use of natural aggregates [7] Company Background - SteelPhalt has been developing high-performance asphalt products for roadmaking in the UK since the 1960s, with a focus on sustainability and innovation [5] - Harsco Environmental operates at over 130 customer sites across more than 32 countries, providing environmentally viable solutions for the treatment and reuse of production co-products in the metals industry [6]