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DCI · Analysis updated Nov 10, 2026, 6:00 PM ET
Why is Donaldson Company, Inc. (DCI) stock moving?
The most material item is the Oct 27 Note Purchase Agreement, which permits up to $1.5B of senior unsecured notes, with an initial $250M series priced at 5.93% and 6.10% coupons, subject to closing conditions. That is a sizable financing program with coupons near 6%, so the company gains flexibility while taking on fixed borrowing costs. The Alpha-Pore launch and the Baird conference appear operational or routine, and neither discloses financial figures. Price action is the stronger current signal: DCI fell to a 30-day low of 82.50 on Oct 30 on 764,102 shares, then rebounded to a 30-day high of 88.85 on Nov 10. Nov 9 closed up 4.6% at 88.21 on 548,558 shares, which is below the heavier volume of Oct 30 and Nov 3 (813,415), so the rally was not accompanied by an unusual volume spike. Nov 10 closed at 87.35, down about 1%, below its VWAP of 87.54. The news flow gives no clear catalyst for the Nov 9 move, and the evidence is thin, so the outlook is roughly balanced.
News behind the analysis
- Donaldson Company to Present at the Baird 2026 Global Industrial ConferenceDonaldson is scheduled to take part in the Baird 2026 Global Industrial Conference. The item is a routine investor-event notice with no new financial figures.
- Donaldson Introduces Alpha-Pore™ Technology Platform for Extended Sterile Filtration PerformanceDonaldson launched Alpha-Pore™, a sterile filtration platform meant to extend filter service life and improve operational efficiency in critical applications. No sales or margin impact was disclosed.
- Form 8-K: Entry into Material Definitive Agreement (Note Purchase Agreement)On Oct 27 Donaldson signed a Note Purchase Agreement allowing up to $1.5B of senior unsecured notes. The initial $250M private placement includes $125M at 5.93% due 2032 and $75M at 6.10% due 2034, subject to closing conditions.
About Donaldson Company, Inc.
Donaldson is a Minneapolis-based maker of filters and filtration systems used in engines, heavy equipment, factories, aircraft and life-sciences processes. It stands out for its large aftermarket business selling replacement filters, and in fiscal 2026 (ended July) it reported record sales of roughly $3.9 billion and finished Facet Filtration, the biggest acquisition in its history.
How it makes money
Its largest segment, Mobile Solutions, brings in roughly 60% of sales. It sells air, fuel and lube filters for trucks and for construction, mining and farm equipment, both to the original equipment makers and, more often, as replacement parts. Industrial Solutions makes dust collectors, compressed-air filters, gas turbine filters and aerospace and defense filtration. Facet added more of this aerospace, defense and power-generation work. Life Sciences makes filters for food, beverage, pharmaceutical and other process uses. Recurring sales of replacement filters provide a steady base of revenue.
What usually moves DCI
- Heavy-duty truck and off-road equipment demand
- Aftermarket replacement filter volumes
- Industrial capital spending and power-generation demand
- Tariffs, raw-material costs and currency swings
- Integration of the Facet acquisition