ATMU vs DCI

Key Takeaways

• Atmus Filtration Technologies (ATMU) is executing a transformational growth strategy, having recently acquired Koch Filter to enter industrial filtration markets including data centers and healthcare.
• Donaldson Company (DCI), a 111-year-old filtration leader, recently completed its largest-ever acquisition (Facet Filtration for approximately $820 million) and posted record quarterly results.
• Both companies are leveraging exposure to data center and power generation tailwinds, though DCI operates with substantially greater scale — roughly $3.8 billion in trailing revenue versus ATMU's $1.76 billion.
• ATMU carries higher near-term execution risk due to ongoing acquisition integration, while DCI benefits from a more diversified, mature business model with 66% recurring replacement-part revenue.
• DCI is an S&P Dividend Aristocrat with 30 consecutive years of dividend increases; ATMU only initiated its dividend following its 2023 spinoff from Cummins.
• Momentum indicators and analyst sentiment have been constructive for both names, though their risk/reward profiles appeal to different types of investors.

Introduction

Two filtration companies, two very different stages of corporate maturity — yet both are competing for investor attention in an environment shaped by data center expansion, industrial reshoring, and evolving emissions regulations. ATMU, spun off from Cummins in 2023, represents a younger, more aggressive growth narrative centered on M&A (mergers and acquisitions)-driven expansion. DCI, with over a century of operating history, offers the steadier profile of a dividend aristocrat that is now layering fresh catalysts — including AI (artificial intelligence)-infrastructure filtration demand — onto its durable aftermarket base. This stock comparison examines how these two filtration pure-plays stack up in the current market environment, providing context for traders and long-term investors weighing relative performance, risk exposure, and strategic positioning.

ATMU Overview and Recent Performance

Atmus Filtration Technologies is a global developer and manufacturer of high-performance filter media and filtration solutions, headquartered in Nashville, Tennessee. Originally part of Cummins Inc., the company completed its separation in 2023 and now operates through two business segments: Power Solutions, serving on- and off-highway equipment markets through its Fleetguard brand, and Industrial Solutions — established in January 2026 following the acquisition of Koch Filter Corporation. This acquisition was a pivotal strategic move, giving Atmus exposure to commercial and industrial HVAC (heating, ventilation, and air conditioning) applications as well as high-growth end markets such as data centers and healthcare.

In its most recent quarterly report, ATMU posted net sales of $478 million, a 14.6% increase year-over-year, largely driven by the Koch Filter contribution. Adjusted EBITDA (earnings before interest, taxes, depreciation, and amortization) reached $95 million, representing a 19.8% margin, while adjusted EPS (earnings per share) came in at $0.69. Power Solutions grew 5.4%, helped by favorable foreign exchange and pricing, though volume was slightly lower. The company guided for full-year 2026 revenue of $1.945 billion to $2.015 billion and adjusted EPS of $2.75 to $3.00. Over recent months, the stock has reflected both enthusiasm for the industrial filtration expansion and caution around geopolitical risks — particularly the Middle East conflict — and muted aftermarket freight activity.

DCI Overview and Recent Performance

Donaldson Company is a pure-play filtration leader with a 111-year operating history and a global footprint spanning more than 140 countries. The company designs and manufactures filtration systems and replacement parts across three segments: Mobile Solutions (on- and off-highway equipment), Industrial Solutions (dust collection, power generation, and aerospace), and Life Sciences (high-purity filtration for food and beverage, disk drives, and bioprocessing). With over 3,000 active patents and roughly two-thirds of revenue derived from recurring, high-margin replacement parts, DCI has built one of the most resilient business models in the industrials sector.

Recent performance has reinforced the bullish narrative. The company posted record third-quarter fiscal 2026 results, with sales of $995.1 million — a 6% year-over-year increase — and adjusted EPS of $1.06. Mobile Solutions aftermarket sales grew 8%, with double-digit growth in independent channels. The Life Sciences segment surged 13%, driven by food and beverage and disk drive filtration demand. Crucially, DCI completed its $820 million acquisition of Facet Filtration, adding high-margin, regulation-driven aerospace and defense filtration capabilities. Analysts at Jefferies upgraded the stock to Buy with a $120 price target, citing improving conditions in mining, non-residential construction, and gas turbine demand linked to data center and AI infrastructure buildout. Morgan Stanley also shifted to a more constructive Equalweight rating.

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Head-to-Head Comparison

While both ATMU and DCI occupy the filtration industry, the contrasts are as important as the similarities.

Scale and maturity: DCI is roughly twice the size by revenue ($3.8 billion trailing versus ~$1.76 billion for ATMU) and operates with a deeply entrenched aftermarket franchise that generates 66% of sales from replacement consumables. ATMU is earlier in its independent corporate lifecycle and is actively building out its aftermarket footprint.

Growth strategy: ATMU is pursuing a four-pillar growth strategy with M&A at its core — the Koch Filter deal is the first step in building an industrial filtration platform. DCI is also acquisitive (the Facet deal being its largest ever) but has a longer track record of integrating bolt-ons into an already diversified portfolio.

Risk factors: ATMU faces near-term integration execution risk from the Koch Filter acquisition and geopolitical exposure to the Middle East, where it generated $38 million in 2025 sales. DCI faces temporary operational headwinds from plant closures and production transfers, but these are expected to resolve by mid-fiscal 2027.

Shareholder returns: DCI has raised its dividend for 30 consecutive years, recently increasing it by 7%. ATMU started its dividend program only post-spinoff and allocated $20–40 million toward buybacks in 2026 — a meaningful start but far from a multi-decade track record.

Valuation context: DCI trades on a trailing P/E (price-to-earnings ratio) of approximately 22.6x, below the machinery industry average of roughly 26.8x, while some discounted cash flow models suggest limited upside from current levels. ATMU carries a P/E ratio reflecting higher growth expectations but also greater uncertainty, as the Koch Filter integration is still in progress.

Tickeron AI Verdict

Based on observable trend consistency, business model resilience, and the balance of near-term catalysts against execution risk, Tickeron's AI-driven analysis would likely lean toward Donaldson Company (DCI) as the more probabilistically favorable choice in the current environment. DCI benefits from a broader, more diversified revenue base, a deeply entrenched aftermarket model with 66% recurring revenue, a 30-year dividend growth track record, and a clearer path to margin recovery as temporary operational headwinds abate. Meanwhile, ATMU offers a more dynamic growth narrative through its Koch Filter integration and industrial filtration expansion, but carries higher near-term integration risk and geopolitical exposure that introduces greater uncertainty. An AI model weighing trend strength, stability, and catalyst visibility would likely assign a higher probability score to DCI at this juncture, while acknowledging that ATMU could present a more asymmetric opportunity if its M&A execution and aftermarket acceleration meet management targets.

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