Onterris ONT

NYSE ONT

$18.17 +0.35 (+1.96%)

As of: Sep 10, 2026 · 3:59 PM EDT

Key Stats

Market Cap648.80 Mn

P/E-58.12

P/S0.84

Div. Yield0.00

Total Debt (Qtr)349.05 Mn

Revenue Growth (1y) (Qtr)-20.42

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About

Montrose Environmental Group, Inc. provides environmental consulting testing and remediation services to help clients meet regulatory and sustainability requirements across the lifecycle of their projects. The company generates revenue by offering services through its three operating segments: Assessment Permitting and Response Measurement and Analysis and Remediation and Reuse primarily under time and materials fixed price and milestone based contracts serving a…

The company generates revenue by offering services through its three operating segments: Assessment Permitting and Response Measurement and Analysis and Remediation and Reuse primarily under time and materials fixed price and milestone based contracts serving a diversified mix of private and public sector clients whose spending is largely non discretionary due to regulatory drivers.

The company operates through the following segments: Assessment Permitting and Response Measurement and Analysis and Remediation and Reuse.

Assessment Permitting and Response: This segment delivers scientific advisory and consulting services for environmental assessments emergency response and recovery toxicology consulting environmental audits and permitting for current operations facility upgrades new projects decommissioning and development projects while helping clients navigate regulatory processes and manage environmental and political impacts and it generated approximately 37.0% of total revenue for the fiscal year ended December 31 2025.
Measurement and Analysis: This segment is one of the largest providers of environmental testing and laboratory services in North America testing air water and soil for contaminant concentrations and toxicological impact offering source and ambient air testing leak detection and advanced multi media laboratory analyses and it generated approximately 29.6% of total revenue for the fiscal year ended December 31 2025.
Remediation and Reuse: This segment provides engineering design and implementation services that treat contaminated water and remove pollutants from soil using advanced treatment technologies and it generated approximately 33.4% of total revenue for the fiscal year ended December 31 2025.

Montrose Environmental Group, Inc. competes in a highly fragmented environmental services industry where no single participant dominates. Its primary competitors include the environmental divisions of large engineering firms such as ERM Ramboll Geosyntec Exponent and WSP for assessment services SGS TRC Companies Eurofins and Pace Analytical for testing and Tetra Tech AECOM Xylem Veolia and Mead & Hunt for remediation. While the company differentiates itself through an integrated platform a focus on innovation reflected in 31 patents proprietary real time monitoring technology a nationwide service footprint and a track record of successful acquisitions that broaden its capabilities and geographic reach.

The company serves a broad customer base that includes oil and gas producers utilities local state provincial and federal government agencies engineering firms industrial manufacturers chemical companies transportation providers renewable energy developers and telecommunications operators with the majority of revenue coming from private sector clients and no single customer disclosed by name although its largest client accounted for roughly 17.8% of 2025 revenue.

Investment Thesis

▲ Bull case

Onterris is positioned to benefit from a structural shift in the environmental solutions market driven by increasing regulatory pressure on PFAS contamination and methane emissions, with its proprietary SORBIX™ RePURE technology offering a defensible competitive advantage through its regenerable, closed-loop ion exchange system that reduces PFAS-laden waste by over 99% and cuts operational costs by more than 50% via shared infrastructure models, a capability not widely replicated by competitors relying on single-use or incineration-based approaches, which positions the company to capture growing demand from municipalities and industrial clients facing tightening EPA and state-level regulations on forever chemicals.
The recent rebranding from Montrose Environmental Group to Onterris, effective May 4, 2026, represents a strategic unification of legacy brands including ECT2, CTEH, Enthalpy Analytical, and Epic Environmental under a single global identity, which management has explicitly stated will enhance cross-selling opportunities, improve client engagement, and accelerate long-term organic growth by eliminating regional fragmentation and creating a more consistent experience for multinational clients — a move that is underappreciated by the market as merely cosmetic but is in fact a foundational step toward scalable, platform-based delivery of environmental solutions.
Despite a 5.2% year-over-year revenue decline in Q1 FY26 due to transitory factors like severe winter weather and lower emergency response activity, the company reported improved Adjusted EBITDA margin stability at 10.6% (vs. 10.7% prior year) and a $6.7 million year-over-year improvement in net loss, driven by operational leverage in the Consulting and Treatment segment, improved project mix, and reduced stock-based compensation, indicating that underlying profitability is strengthening even as top-line growth is temporarily muted — a sign that the market is overlooking the company’s ability to expand margins through cost discipline and operational efficiency amid external headwinds.
Onterris’s liquidity position remains robust with $188.4 million in available liquidity as of March 31, 2026, including a $178.4 million revolver availability and a leverage ratio of 2.8x under its 2025 Credit Facility, providing ample financial flexibility to fund organic growth initiatives, pursue bolt-on acquisitions in high-growth areas like PFAS remediation and methane monitoring, and invest in scaling its RePURE and VeriPlume technologies without relying on dilutive equity financing — a strength that is not being adequately weighted against the company’s near-term earnings volatility.
The company’s pipeline visibility, reinforced by recent award wins such as the Judges’ Choice recognition in the 2026 Environment+Energy Leader Awards for its PFAS solution and prior recognition in Digital Transformation and Environmental Impact categories, signals strong market validation of its innovation pipeline, which management cited as a key support for its unchanged full-year outlook — an indicator that demand is not only present but accelerating in high-value, regulated niches where Onterris holds differentiated technology, suggesting that current revenue softness is a temporary weather-related blip rather than a demand deterioration.

Onterris is positioned to benefit from a structural shift in the environmental solutions market driven by increasing regulatory pressure on PFAS contamination and methane emissions, with its proprietary SORBIX™ RePURE technology offering a defensible competitive advantage through its regenerable, closed-loop ion exchange system that reduces PFAS-laden waste by over 99% and cuts operational costs by more than 50% via shared infrastructure models, a capability not widely replicated by competitors relying on single-use or incineration-based approaches, which positions the company to capture growing demand from municipalities and industrial clients facing tightening EPA and state-level regulations on forever chemicals.
The recent rebranding from Montrose Environmental Group to Onterris, effective May 4, 2026, represents a strategic unification of legacy brands including ECT2, CTEH, Enthalpy Analytical, and Epic Environmental under a single global identity, which management has explicitly stated will enhance cross-selling opportunities, improve client engagement, and accelerate long-term organic growth by eliminating regional fragmentation and creating a more consistent experience for multinational clients — a move that is underappreciated by the market as merely cosmetic but is in fact a foundational step toward scalable, platform-based delivery of environmental solutions.
Despite a 5.2% year-over-year revenue decline in Q1 FY26 due to transitory factors like severe winter weather and lower emergency response activity, the company reported improved Adjusted EBITDA margin stability at 10.6% (vs. 10.7% prior year) and a $6.7 million year-over-year improvement in net loss, driven by operational leverage in the Consulting and Treatment segment, improved project mix, and reduced stock-based compensation, indicating that underlying profitability is strengthening even as top-line growth is temporarily muted — a sign that the market is overlooking the company’s ability to expand margins through cost discipline and operational efficiency amid external headwinds.
Onterris’s liquidity position remains robust with $188.4 million in available liquidity as of March 31, 2026, including a $178.4 million revolver availability and a leverage ratio of 2.8x under its 2025 Credit Facility, providing ample financial flexibility to fund organic growth initiatives, pursue bolt-on acquisitions in high-growth areas like PFAS remediation and methane monitoring, and invest in scaling its RePURE and VeriPlume technologies without relying on dilutive equity financing — a strength that is not being adequately weighted against the company’s near-term earnings volatility.
The company’s pipeline visibility, reinforced by recent award wins such as the Judges’ Choice recognition in the 2026 Environment+Energy Leader Awards for its PFAS solution and prior recognition in Digital Transformation and Environmental Impact categories, signals strong market validation of its innovation pipeline, which management cited as a key support for its unchanged full-year outlook — an indicator that demand is not only present but accelerating in high-value, regulated niches where Onterris holds differentiated technology, suggesting that current revenue softness is a temporary weather-related blip rather than a demand deterioration.

▼ Bear case

Onterris continues to face significant execution risk in its consulting and treatment segment, where organic growth of only $2.5 million in Q1 FY26 failed to offset a $5.8 million decline in environmental emergency response revenue, revealing a troubling dependency on volatile, project-based emergency work that is inherently unpredictable and not a sustainable foundation for long-term growth, especially as climate patterns may reduce the frequency of certain extreme weather events that historically drove such demand.
Despite management’s claims of improved operating margins in the Consulting and Treatment segment, the company’s overall Adjusted EBITDA margin remained flat year-over-year at 10.6% (vs. 10.7%) despite cost-cutting benefits from reduced stock-based compensation and prior-year renewables business losses, suggesting that core operational profitability is not improving meaningfully and that any margin gains are being offset by structural weaknesses in the Measurement and Analysis segment, where weather-related disruptions continue to erode lab and field service reliability — a persistent issue that undermines confidence in the company’s ability to deliver consistent, scalable results.
The rebranding initiative, while framed as strategic, carries substantial execution risk: integrating legacy brands such as ECT2, CTEH, and Enthalpy Analytical under the Onterris name involves complex IT migration, cultural alignment, and potential client confusion during transition, as evidenced by the $1.1 million in non-recurring rebranding expenses recorded in Q1 FY26, with no clear timeline for when these costs will subside or when synergies will materialize — a risk that is downplayed in forward-looking statements but could delay the promised growth acceleration and dilute brand equity if not managed flawlessly.
Onterris’s leverage ratio of 2.8x, while within covenant limits, leaves little room for error in a rising interest rate environment, especially given that interest expense increased year-over-year to $5.466 million from $5.065 million, and the company’s reliance on its revolving credit facility for liquidity (with $178.4 million available) could become costly if credit conditions tighten, particularly as the company continues to burn cash — with negative free cash flow of $17.2 million in Q1 FY26 driven by a $16.0 million bonus payout tied to 2025 outperformance, a one-time item that flattered prior-year cash flow and masks ongoing operational cash consumption.
The company’s dependence on government and industrial clients for its PFAS and methane solutions exposes it to political and regulatory uncertainty; while EPA regulations on PFAS and methane are currently favorable, any shift in federal policy — such as delayed enforcement, weakened standards, or reduced funding for state and municipal environmental programs — could abruptly slow adoption of Onterris’s high-cost, technology-intensive solutions, and the firm has not provided sufficient detail on how insulated its revenue is from such policy swings, leaving investors exposed to an unquantified macro risk that is not reflected in its current valuation.

Onterris continues to face significant execution risk in its consulting and treatment segment, where organic growth of only $2.5 million in Q1 FY26 failed to offset a $5.8 million decline in environmental emergency response revenue, revealing a troubling dependency on volatile, project-based emergency work that is inherently unpredictable and not a sustainable foundation for long-term growth, especially as climate patterns may reduce the frequency of certain extreme weather events that historically drove such demand.
Despite management’s claims of improved operating margins in the Consulting and Treatment segment, the company’s overall Adjusted EBITDA margin remained flat year-over-year at 10.6% (vs. 10.7%) despite cost-cutting benefits from reduced stock-based compensation and prior-year renewables business losses, suggesting that core operational profitability is not improving meaningfully and that any margin gains are being offset by structural weaknesses in the Measurement and Analysis segment, where weather-related disruptions continue to erode lab and field service reliability — a persistent issue that undermines confidence in the company’s ability to deliver consistent, scalable results.
The rebranding initiative, while framed as strategic, carries substantial execution risk: integrating legacy brands such as ECT2, CTEH, and Enthalpy Analytical under the Onterris name involves complex IT migration, cultural alignment, and potential client confusion during transition, as evidenced by the $1.1 million in non-recurring rebranding expenses recorded in Q1 FY26, with no clear timeline for when these costs will subside or when synergies will materialize — a risk that is downplayed in forward-looking statements but could delay the promised growth acceleration and dilute brand equity if not managed flawlessly.
Onterris’s leverage ratio of 2.8x, while within covenant limits, leaves little room for error in a rising interest rate environment, especially given that interest expense increased year-over-year to $5.466 million from $5.065 million, and the company’s reliance on its revolving credit facility for liquidity (with $178.4 million available) could become costly if credit conditions tighten, particularly as the company continues to burn cash — with negative free cash flow of $17.2 million in Q1 FY26 driven by a $16.0 million bonus payout tied to 2025 outperformance, a one-time item that flattered prior-year cash flow and masks ongoing operational cash consumption.
The company’s dependence on government and industrial clients for its PFAS and methane solutions exposes it to political and regulatory uncertainty; while EPA regulations on PFAS and methane are currently favorable, any shift in federal policy — such as delayed enforcement, weakened standards, or reduced funding for state and municipal environmental programs — could abruptly slow adoption of Onterris’s high-cost, technology-intensive solutions, and the firm has not provided sufficient detail on how insulated its revenue is from such policy swings, leaving investors exposed to an unquantified macro risk that is not reflected in its current valuation.

Geographical Breakdown of Revenue (2025)

Peer group

Peer Comparison

Companies in the Environmental Services

S.No.	Ticker	Company	match	Market Cap	P/E	P/S	Total Debt (Qtr)
1	ONT	Onterris, Inc.	primary	0.65 Bn	-58.12	0.84	0.35 Bn
2	PWR	Quanta Services, Inc.	secondary	92.96 Bn	68.84	2.83	6.10 Bn
3	ECL	Ecolab Inc.	secondary	76.29 Bn	37.15	4.53	13.18 Bn
4	VST	Vistra Corp.	secondary	49.64 Bn	24.49	2.58	21.47 Bn
5	FERG	Ferguson Enterprises Inc. /DE/	secondary	43.04 Bn	21.21	1.37	4.13 Bn
6	IDXX	Idexx Laboratories Inc /De	secondary	39.99 Bn	35.09	8.78	0.82 Bn
7	IR	Ingersoll Rand Inc.	secondary	28.47 Bn	29.47	3.58	4.77 Bn
8	TDY	Teledyne Technologies Inc	secondary	27.62 Bn	28.33	4.33	2.03 Bn

Onterris ONT

About

Investment Thesis

Segments Breakdown of Revenue (2025)

Geographical Breakdown of Revenue (2025)

Peer Comparison

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