Donaldson (DCI) Q4 2026 earnings review
Record Finish Driven by Margin Recovery and Facet Acquisition
Donaldson capped off FY26 with a robust Q4, accelerating revenue growth to 8.0% and pushing adjusted EPS up 11.7%. The story centers on strong operational execution and the immediate impact of the Facet acquisition. Gross margin surged 180 basis points YoY to 36.3% as the company moved past previous production inefficiencies and utilized pricing power. Industrial segment margins saw a sharp 300 basis point sequential recovery, a major positive after struggles earlier in the year. FY27 guidance projects another record year with 5.5-9.5% sales growth, signaling confidence in sustained end-market demand and M&A integration.
🐂 Bull Case
The 180 bps gross margin expansion proves the heavy lift of footprint optimization and overcoming power generation ramp inefficiencies is yielding results.
The Facet acquisition contributed ~$30M to Q4 sales and is expected to drive 50%+ growth in the Aerospace & Defense unit in FY27, adding high-margin recurring revenue.
🐻 Bear Case
Industrial Filtration Solutions (IFS) sales fell 2.0% in Q4 as new equipment orders in dust collection softened, signaling potential capex hesitation among customers.
Interest expense doubled YoY to $14.7M in Q4 following the Facet deal. Elevated debt levels are capping share repurchases at just ~1% for FY27.
⚖️ Verdict: 🟢
Bullish. Donaldson is accelerating both its top and bottom lines while actively fixing the operational inefficiencies that plagued it earlier in the fiscal year. The accretive nature of the Facet deal and a return to margin expansion outweigh cyclical softness in specific industrial niches.
Key Themes
Margin Expansion via Operational Turnaround
Gross margin expanded 180 basis points YoY to 36.3%, reversing the severe contraction seen earlier in FY26. Management successfully moved past the costs of footprint optimization and the steep learning curve at its Mexico power generation facility. The Industrial segment's EBT margin, a major concern in Q1 and Q2, rebounded 300 basis points sequentially from Q3, demonstrating strong execution.
Facet Acquisition Supercharges Aerospace & Defense
The $820M Facet acquisition closed and immediately contributed ~$30M to Q4 top line, driving a massive 61.0% YoY spike in Aerospace & Defense sales. This pivot into mission-critical, highly regulated filtration for aviation and marine end markets gives Donaldson a durable new growth vector. FY27 guidance models an over 50% increase in A&D sales due to a full year of Facet operations alongside mid-teens organic recovery.
Mobile Aftermarket Remains the Unshakeable Anchor
Mobile Aftermarket sales accelerated to 9.4% growth in Q4, powered by robust performance in both OE and independent channels. High global vehicle utilization rates and ongoing market share gains, partly fueled by new fleet operator contracts, continue to validate the company's 'razor-to-sell razor blades' model. This segment generated over $1.9B in FY26, providing crucial stability.
Organic Weakness in Industrial Filtration Solutions
Reversing its previous growth trajectory, IFS sales declined 2.0% in Q4. Management attributed this to weaker new equipment sales in dust collection, which offset the ongoing strength in Power Generation. This indicates that broader industrial capex decisions, particularly in the Americas, remain delayed due to macroeconomic uncertainty.
Increased Leverage and Interest Expense Burden
The all-cash Facet acquisition fundamentally shifted the balance sheet. Long-term debt spiked to $1.28B (from $630M a year ago). Interest expense in Q4 more than doubled to $14.7M. For FY27, interest expense is guided to $55M-$60M, a significant headwind to net income that will force management to prioritize debt paydown over aggressive share repurchases.
On-Road Equipment Cycle Showing Green Shoots
Mobile On-Road sales flipped from negative to an 8.7% YoY increase in Q4. After multiple quarters of cyclical trough conditions, US and European truck production volumes appear to be recovering. Management forecasts high-single-digit On-Road growth for FY27, signaling the start of a new upcycle.
Other KPIs
Operating cash flow generated $199.9M against just $14.7M in capex. The quarter's massive cash generation represented a 143% conversion rate of net earnings, highlighting excellent working capital efficiency that helps mitigate the new debt load.
Accelerated to 9.7% YoY growth. Sustained momentum is driven by double-digit expansion in Disk Drive (benefiting from AI/cloud storage and HAMR technology share gains) and robust volume in Food & Beverage equipment and consumables.
Guidance
Accelerating from 5.3% in FY26. Includes a 2% inorganic benefit from Facet, 2% from pricing, and 1% from FX. Implies core organic volume growth of 0.5% to 4.5%.
Accelerating trajectory. Represents a notable step up from FY26 GAAP EPS of $3.85 and Adjusted EPS of $3.98, despite carrying ~$0.12 of projected dilution from the Facet acquisition (due to amortization and run-rate expenses).
Accelerating. Up from FY26 GAAP operating margin of 15.4% (and adjusted 16.0%). Gross margin expansion is expected to outpace expense deleveraging linked to the Facet deal.
Stable. Up slightly from FY26 actuals of $67.4M. Sustained investment level is needed to support the rapidly growing liquid cooling, power generation, and life sciences manufacturing footprint.
Key Questions
Industrial Dust Collection Demand
IFS organic sales declined 2.0% as dust collection equipment orders weakened. Are you seeing outright project cancellations or merely deferrals, and what lead indicators would signal a capex recovery in the Americas?
Facet Integration and Revenue Synergies
With Facet now closed, what is the timeline for cross-selling its mission-critical aviation and marine products through Donaldson's established global industrial distribution channels?
Pricing Power Sustainability
FY27 guidance bakes in 2% pricing growth. Given the normalization of inflation and the 180 bps gross margin expansion already achieved, how much pushback are you experiencing from key OEM partners on further price increases?