Donaldson (DCI) is a defensive filtration compounder with 60% aftermarket revenue, expanding margins, Facet-led diversification, and an attractive five-year probability-weighted target despite near-term leverage and execution risks.
Overview
Donaldson is a global filtration leader with more than 150 locations across six continents and three operating segments: Mobile Solutions, Industrial Solutions, and Life Sciences, with the latter becoming Process Filtration in Q1 FY27. Its core economics resemble a razor-and-blade model: proprietary equipment placements create a captive installed base, while replacement filters generate approximately 60% of sales and support recurring, high-margin cash flow. **FY26 demonstrated strong execution**, with record sales of $3.886 billion, up 5.3%, adjusted EPS of $3.98, up 8.2%, adjusted gross margin of 36.7%, and adjusted operating margin of 16.0%; Q4 sales exceeded $1 billion and operating margin reached 17.5%. FY27 guidance calls for 5.5%–9.5% sales growth, $4.22–$4.38 EPS, 16.6%–17.2% operating margin, and 95%–105% FCF conversion. The Facet acquisition adds aerospace and defense exposure but increases leverage and interest expense. At $95.41, valuation is full at 25.08x trailing P/E and 2.89x sales, yet five-year scenarios imply $76.85–$189.08, with a probability-weighted target of $142.26. Near-term catalysts include Mexico recovery, Facet synergies, Process Filtration growth, and buyback resumption.