Research · Sep 3, 2026
[ATMU] Atmus Filtration Thesis 2026: A Heavy-Duty Filtration Compounder Rides Aftermarket Demand and OEM Recovery
Atmus Filtration Technologies Inc. (NYSE: ATMU), headquartered in Nashville, Tennessee (corporate HQ + Nashville-TN-Atmus-Filtration-Technologies), is a heavy-duty filtration-products + aftermarket-and-OEM filtration company providing distinctive multi-cycle Fleetguard + Donaldson-and-multi-cycle-Donaldson + heavy-duty + industrial-air + emerging-Aftermarket-and-OEM filtration services to US + EU + Asia-Pacific + Latin America + emerging-multi-jurisdiction Aftermarket + OEM + heavy-duty + industrial-air filtration customer base. Founded as Cummins Filtration (multi-cycle-Cummins-Filtration providing multi-cycle-Cummins-Filtration-and-Fleetguard heavy-duty filtration platform); 2023 substantial Cummins-spinoff providing Atmus-and-Cummins-spinoff; May 2023 NYSE IPO. Multi-decade strategic-evolution: 1958-2023 Cummins Filtration + Fleetguard + Donaldson + heavy-duty + industrial-air platform; 2023 Cummins-spinoff + 2023 NYSE IPO; 2023-2025 post-Cummins-spinoff Atmus + emerging-Fleetguard + emerging-Aftermarket + emerging-OEM-recovery + emerging-industrial-air-filtration + emerging-power-generation + emerging-data-center + multi-cycle-deleveraging. Under CEO Steph Disher (since 2022, prior longtime Cummins Filtration + Cummins executive), FY2025 closes with selected various aggregate revenue ~$1.75-1.90B, adj. EBITDA ~$340-410M, adj. EPS ~$2.60-3.30, net debt ~$0.45-0.70B, and ~83-85M shares outstanding. The first deep-dive — Fleetguard heavy-duty + industrial-air + Aftermarket-and-OEM filtration franchise — covers entire heavy-duty filtration-products + aftermarket-and-OEM filtration business + Atmus-and-Fleetguard positioning. Product portfolio: Fleetguard heavy-duty filtration. Aftermarket (~65-70% revenue): fuel-filters + lube-filters + air-filters + coolant-filters + hydraulic-filters + Aftermarket-pricing-power + Genuine-Parts NAPA + Aftermarket-distributor. OEM (~30-35% revenue): Cummins (~25-35% customer-concentration) + PACCAR + Daimler-Truck + Caterpillar + John-Deere + Volvo-Truck + AGCO + CNH-Industrial. ~25-30% global heavy-duty-Fleetguard-and-Donaldson-Powercore share + ~20-30% North-American-Aftermarket-and-OEM-heavy-duty-filtration. Emerging multi-cycle industrial-air-filtration + power-generation + data-center (distinctive emerging-data-center tailwinds). Competes with Donaldson (DCI most-direct-larger-comp), Parker Hannifin (PH Parker-Filtration), Mann+Hummel (private German-filtration most-direct-private-Mann-and-Hummel-comp), Hengst Filtration (private), AAF International (private Daikin-subsidiary), Camfil (private Swedish-air-filtration), 3M (MMM), Pall (Danaher-subsidiary), Eaton (ETN), Lydall (Unifrax-acquired); heavy-duty-Aftermarket Genuine Parts (GPC NAPA most-direct-Aftermarket-distributor-comp), LKQ (LKQ), AutoNation (AN), CarMax (KMX); industrial-air-OEM Lennox (LII), Carrier Global (CARR), Trane Technologies (TT). The second deep-dive — Steph-Disher + 2023-Cummins-spinoff + emerging-Aftermarket-and-industrial-air compounder thesis — covers Steph-Disher-CEO + Cummins Filtration + Cummins expertise, 2023-Cummins-spinoff + 2023-NYSE-IPO transformational-platform + multi-cycle-deleveraging-post-Cummins-spinoff, emerging-Aftermarket + emerging-industrial-air-filtration + emerging-power-generation + emerging-data-center structural-tailwinds. Multi-decade compounder thesis combines Cummins-Filtration-and-Atmus + 2023-Cummins-spinoff ~65+ year heritage, Fleetguard heavy-duty filtration + Aftermarket + OEM + emerging-industrial-air-and-power-generation-and-data-center platform, ~25-30% global heavy-duty + ~20-30% North-American-Aftermarket-and-OEM category-leader, Steph Disher + Cummins Filtration + Cummins expertise, reliable-and-emerging-growing-dividend + IG-equivalent balance-sheet, emerging-Aftermarket + industrial-air + power-generation + data-center structural-tailwinds. Capital position is IG-equivalent (BB+/BBB-), dividend-reliable-and-emerging-growing, post-2023-Cummins-spinoff deleveraging-trajectory, conservative: net debt ~$0.45-0.70B (~1.2-1.8x leverage post-Cummins-spinoff deleveraging), BB+/BBB-equivalent (emerging-IG), $0.25-0.40B cash + undrawn revolver liquidity, FCF ~$200-280M/yr deployed into capex ~$40-70M/yr + deleveraging + dividend (~$0.21/yr, ~0.5-0.8% yield, ~7-10% payout) + ~$25-100M/yr buyback + selective-bolt-on-M&A, ~83-85M shares post-2023-Cummins-spinoff. At ~$28-45 per share, equity value ~$2.4-3.8B, EV ~$2.8-4.5B, ~11-17x EPS and ~7-12x EV/EBITDA. Base case: Aftermarket + OEM cycle constructive + emerging-Aftermarket + emerging-OEM-recovery + industrial-air + power-generation + data-center growth + deleveraging + revenue $1.85-2.05B + adj. EBITDA $370-450M + adj. EPS $2.90-3.65 + dividend hiked + ~5-15% return. Bull case: Aftermarket + OEM cycle accelerates + emerging-industrial-air-filtration + emerging-data-center inflects + emerging-power-generation accelerates + deleveraging substantial + revenue $1.95-2.20B + adj. EBITDA $410-510M + adj. EPS $3.30-4.30 + buyback + selective-M&A + re-rate 14-18x + 20-40%+ return. Bear case: Aftermarket + OEM cycle stresses + emerging-industrial-air-filtration disappoints + emerging-power-generation disappoints + Cummins-customer-concentration stress + adj. EPS $1.80-2.20 + de-rate 8-11x + flat-to-substantially-negative.