Exhibit 99.1 Montrose Environmental Group Reports Record First Quarter Results, Increases 2025 Guidance, and Announces Inaugural Stock Repurchase Program First Quarter 2025 Highlights (comparisons to first quarter 2024) Increased 2025 Guidance Strategic Capital Allocation Update Little Rock, Arkansas (May 7, 2025) – Montrose Environmental Group, Inc. (the "Company," "Montrose" or "MEG") (NYSE: MEG) is on a mission to help protect the air we breathe, the water we drink, and the soil that feeds us, and aims t ...

Core Insights - Montrose Environmental Group reported its highest-ever first-quarter revenue, Consolidated Adjusted EBITDA, and operating cash flow for Q1 2025, driven by strong organic growth and strategic capital allocation [3][6][12] - The company has increased its 2025 guidance for Consolidated Adjusted EBITDA to a range of $103.0 million to $110.0 million, reflecting a positive outlook despite macroeconomic uncertainties [4][5] - Montrose aims to achieve high-single-digit organic revenue growth and enhance margins while maintaining liquidity and optimizing its balance sheet [3][5] Financial Performance - Total revenue for Q1 2025 was $177.8 million, a 14.5% increase from $155.3 million in Q1 2024, attributed to organic growth and contributions from acquisitions [6][8] - The net loss for Q1 2025 was $19.4 million, or $0.64 per diluted share, compared to a net loss of $13.4 million, or $0.53 per diluted share in the prior year [9][10] - Adjusted Net Income for Q1 2025 was $5.8 million, or $0.07 per diluted share, down from $8.4 million, or $0.16 per diluted share in Q1 2024 [10][36] Segment Performance - The Remediation and Reuse segment generated $65.7 million in revenue, while the Measurement and Analysis segment contributed $59.0 million, reflecting strong demand across diverse end markets [8][20] - The Assessment, Permitting and Response segment saw a revenue decline to $53.1 million due to the absence of larger projects that occurred in the prior year [8][20] Cash Flow and Liquidity - Operating cash flow for Q1 2025 was $5.5 million, a significant improvement from a cash outflow of $22.0 million in the prior year [12][23] - As of March 31, 2025, Montrose had a leverage ratio of 2.2x and liquidity of $294.2 million, including $30.3 million in cash [14][21] Strategic Initiatives - The company announced a stock repurchase program of up to $40.0 million and redeemed $60.0 million of preferred equity in April 2025 [6][14] - Montrose's strategic focus includes enhancing environmental stewardship while driving economic growth through its integrated service portfolio [3][5]

Group 1: Company Overview - Montrose Environmental Group is focused on enhancing environmental stewardship while supporting economic development, with a recent contract worth $4 million AUD for environmental services in Australia's Bowen Basin [1][2] - The company employs approximately 3,400 people across over 100 locations globally, combining local knowledge with an integrated approach to deliver innovative solutions [4] Group 2: Industry Context - The global demand for steel is increasing, prompting Montrose to assist the industry in transitioning to more sustainable practices [2] - Montrose's expertise in environmental consulting, including risk assessments and regulatory compliance, positions it as a trusted partner for responsible mining operations [3][4] Group 3: Project Details - The project in Bowen Basin includes advanced environmental baseline and impact assessments, crucial for the mine's development and sustainability [1] - Montrose aims for fast-tracked delivery over the coming year, reinforcing its role in advancing sustainable development in resource-intensive industries [1][3]

Core Insights - Montrose Environmental Group, Inc. is focused on protecting air, water, and soil while enhancing environmental stewardship and economic development [1] Group 1: Financial Results Announcement - Montrose plans to release its first quarter 2025 results on May 7, 2025, after the close of trading on the New York Stock Exchange [2] - A conference call to discuss the first quarter 2025 results and forward outlook is scheduled for May 8, 2025, at 8:30 a.m. Eastern Time [2] Group 2: Conference Call Details - A live webcast of the conference call will be available on the Investors section of the Montrose website [3] - Participants can join the call by dialing 1-844-826-3035 in the U.S. or 1-412-317-5195 internationally [3] Group 3: Company Overview - Montrose is a leading environmental solutions company with approximately 3,400 employees across 120 locations worldwide [5] - The company offers a range of services including air measurement, regulatory compliance, environmental emergency response, and remediation [5]

Core Insights - Montrose Environmental Group has been selected by a public multinational energy company to support emissions monitoring, with a project valued at over $3 million for 2025, indicating sustained demand from key clients [1] - The company aims to help clients minimize greenhouse gas emissions and reduce costs, achieving approximately 60% reduction in reported emissions compared to default EPA factors [2] - Montrose has one of the largest air quality teams in North America, providing emissions solutions that benefit both the environment and industry, even amidst regulatory uncertainties [3] Company Overview - Montrose Environmental Group employs around 3,410 individuals across 120 locations globally, combining local knowledge with an integrated approach to address unique project requirements [4] - The company offers a wide range of services including air measurement, regulatory compliance, environmental emergency response, permitting, engineering, and remediation [4]

LITTLE ROCK, Ark., April 9, 2025 /PRNewswire/ -- Montrose Environmental Group, Inc. (the "Company", "Montrose" or "MEG") (NYSE: MEG) is on a mission to help protect the air we breathe, the water we drink, and the soil that feeds us, and aims to enhance environmental stewardship and economic development. The Company is providing an interim update to highlight continued strong business performance and affirm 2025 revenue, consolidated adjusted EBITDA, organic growth, and environmental response guidance. The c ...

Recognized for Top Product Business & Infrastructure and three Top Project Environmental Impact LITTLE ROCK, Ark., April 2, 2025 /PRNewswire/ -- Montrose Environmental Group (NYSE: MEG) is on a mission to help protect the air we breathe, the water we drink, and the soil that feeds us. The company recently earned four wins in the prestigious E+E Leader Product & Project Awards for: The E+E Leader Product & Project Awards is an annual program recognizing excellence in products and services that provide compa ...

Core Insights - Montrose Environmental (MEG) is currently rated as a 2 (Buy) by Zacks Rank, while Casella (CWST) holds a 3 (Hold) rating, indicating a more favorable outlook for MEG [3] - MEG has shown positive revisions in earnings estimates, suggesting an improving earnings outlook compared to CWST [3] Valuation Metrics - MEG has a forward P/E ratio of 13.06, significantly lower than CWST's forward P/E of 95.09, indicating that MEG may be undervalued [5] - The PEG ratio for MEG is 0.36, while CWST's PEG ratio is 3.69, further suggesting that MEG is more attractive in terms of growth relative to its price [5] - MEG's P/B ratio stands at 1.12, compared to CWST's P/B of 4.51, reinforcing the notion that MEG is a better value investment [6] - Overall, MEG has a Value grade of A, while CWST has a Value grade of C, highlighting MEG's superior valuation metrics [6]

Group 1 - The Conservative Income Portfolio targets high-value stocks with significant margins of safety and aims to reduce volatility through well-priced options [1][3] - The Enhanced Equity Income Solutions Portfolio is designed to generate yields of 7-9% while minimizing volatility [1] - Trapping Value provides Covered Calls and focuses on capital preservation, while the Fixed Income Portfolio emphasizes high income potential and undervalued securities [2][3] Group 2 - MEG Energy has received a Buy rating after a period of cautious observation, indicating a positive outlook for the company [2] - The team behind Trapping Value has over 40 years of combined experience in generating options income and capital preservation [3]

Core Insights - The article compares two stocks in the Waste Removal Services sector: Montrose Environmental (MEG) and Casella (CWST), evaluating which presents a better value opportunity for investors [1] Valuation Metrics - Both MEG and CWST currently hold a Zacks Rank of 2 (Buy), indicating positive earnings estimate revisions and improving earnings outlooks [3] - MEG has a forward P/E ratio of 17.77, significantly lower than CWST's forward P/E of 96.09, suggesting MEG is more attractively priced [5] - MEG's PEG ratio is 0.49, while CWST's PEG ratio is 3.73, indicating that MEG is expected to grow earnings at a more favorable rate relative to its price [5] - MEG's P/B ratio stands at 1.53, compared to CWST's P/B of 4.56, further supporting the notion that MEG is undervalued relative to its book value [6] - Based on these valuation metrics, MEG is assigned a Value grade of B, while CWST receives a Value grade of C, reinforcing MEG's position as the superior value option [6]