4 Pollution Control Stocks to Monitor Amid Strong Industry Trends
Industry Outlook: The Zacks Pollution Control industry is experiencing strong demand for air pollution control products due to increasing greenhouse gas emissions and stringent government regulations, although the rise of renewable energy sources poses challenges.
Key Players: Companies like Donaldson Company, Atmus Filtration Technologies, Energy Recovery, and Fuel Tech are well-positioned to benefit from the growing market for pollution control technologies and services.
Market Trends: Rapid urbanization and heightened public awareness of health risks from air pollution are driving demand, while strict emission standards globally are further supporting the industry.
Performance Metrics: Despite a solid Zacks Industry Rank indicating positive near-term prospects, the pollution control industry has underperformed compared to the broader Industrial Products sector and the S&P 500 over the past year.
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- Position Change: According to a February 17, 2026 SEC filing, Bayberry Capital sold its entire holding of 282,500 shares in Atmus Filtration Technologies during Q4 2025, resulting in a $12.74 million decrease in its position, indicating a strategic portfolio adjustment.
- Company Performance: Atmus reported $1.76 billion in sales for 2025, up from $1.67 billion in 2024, with net income reaching $207 million, demonstrating solid financial performance amid stable industrial demand.
- Market Performance: As of now, Atmus shares are priced at $56.72, reflecting a 51% increase over the past year, significantly outperforming the S&P 500's approximately 21% gain during the same period, indicating strong market confidence in its growth prospects.
- Investor Analysis: Bayberry's exit does not imply a negative outlook on Atmus's fundamentals but may reflect portfolio management considerations, as its largest holdings remain concentrated in companies like Lionsgate and Churchill Downs, showcasing a diversified investment strategy.
- Shareholding Change: Bayberry Capital sold 282,500 shares of Atmus Filtration Technologies in Q4 2026, resulting in a $12.74 million decrease in its position value, fully exiting its investment in the company.
- Financial Performance: Despite Bayberry's exit, Atmus achieved $1.76 billion in sales for 2025, a 5.4% increase year-over-year, with net income of $207 million and adjusted EBITDA of $354 million, indicating stability in the industrial filtration market.
- Market Demand: Atmus's Fleetguard products cater to transportation, construction, agriculture, and power generation sectors, which, while not explosive in growth, generate consistent cash flows and strong replacement demand, suggesting robust fundamentals.
- Portfolio Adjustment: Bayberry's exit appears to be a strategic portfolio decision, as its largest holdings are concentrated in companies like Lionsgate Studios, Churchill Downs, and WESCO International, indicating a preference for other investment opportunities.
- Stake Increase: Port Capital LLC filed with the SEC on February 17, 2026, revealing an increase of 446,260 shares in Atmus Filtration Technologies, with an estimated transaction value of $21.60 million, reflecting confidence in the company's growth potential and investment strategy.
- Value Growth: The value of Atmus Filtration's position rose by $26.10 million at quarter-end, indicating a positive impact from both share purchases and price changes, which further solidifies Port Capital's investment stance in the company.
- Market Performance: As of March 9, 2026, Atmus Filtration shares were priced at $58.21, up 55.7% over the past year, with a one-year alpha of 36 percentage points compared to the S&P 500, showcasing its strong market performance.
- Strategic Acquisition: Atmus's recent $450 million acquisition of Koch Filter allows entry into the rapidly growing air filtration market, particularly in data centers and power generation, indicating the company's strategy to leverage AI trends for new growth opportunities and enhance its competitive edge.
- Increased Holdings: Port Capital LLC reported an increase of 446,260 shares in Atmus Filtration Technologies as of February 17, 2026, with an estimated transaction value of $21.60 million, reflecting confidence in the company's growth potential.
- Quarter-End Value Growth: As of December 31, 2025, the value of Port Capital's position in Atmus rose by $26.10 million, indicating the dual impact of trading activity and price movements, bringing its stake to 1.96% of reported assets under management.
- Strong Market Performance: As of March 9, 2026, Atmus Filtration's stock was priced at $58.21, representing a 55.7% increase over the past year, with a 36 percentage point alpha over the S&P 500, showcasing its robust performance in the heavy asset sector.
- Strategic Acquisition: Atmus, spun off from Cummins in 2023, acquired Koch Filter for $450 million, entering the rapidly growing air filtration market, particularly in data centers and power generation, thereby solidifying its market position and laying the groundwork for future growth.
Court Ruling: A judge in the Court of International Trade ordered Customs and Border Protection to refund tariffs imposed under the International Emergency Economic Powers Act.
Implications for Importers: This ruling, stemming from a case brought by Atmus Filtration, may lead to refunds for other importers affected by similar tariff impositions.











