Donaldson (DCI) Q4 2025 earnings review
Record FY25 Capped by Strong Q4; FY26 Guidance Points to Continued Margin Expansion
Donaldson delivered a strong finish to a record year, with Q4 sales growing 4.8% and adjusted EPS up 9.6%. Growth was driven by continued market share gains in the high-margin Aftermarket business and a key inflection in the Off-Road segment, which returned to growth after eight quarters of declines. This strength offset ongoing weakness in the On-Road truck market. A notable dip in Q4 gross margin, attributed to LIFO accounting and tariff inflation, was a blemish on an otherwise strong profitability story. However, management expressed confidence in its mitigation strategies and issued robust FY26 guidance, forecasting another record year for sales ($3.8B), operating margin (16.4%), and EPS ($4.00), demonstrating a clear path to continued earnings growth.
🐂 Bull Case
The company continues to win and gain share in its high-margin Aftermarket business, which serves as a stable foundation, providing resilience against cyclical first-fit market weakness.
Despite a Q4 gross margin dip, FY26 guidance for a record 16.4% operating margin (midpoint) is ahead of the company's prior long-term targets, underscoring strong operational discipline and cost control.
The key Off-Road segment, heavily tied to agriculture, inflected to 5.1% growth in Q4, signaling a potential bottoming of the ag cycle and a future tailwind for the Mobile business.
🐻 Bear Case
Adjusted gross margin fell 140 bps YoY to 34.8% in Q4, attributed to tariff-related inflation and LIFO accounting. This highlights a vulnerability that could pressure profitability if not effectively managed.
The strategic investment in Life Sciences, particularly bioprocessing, continues to weigh on profitability. Muted FY26 sales guidance of 1-5% and management commentary suggest a meaningful earnings contribution is still a year or more away.
The On-Road segment remains very weak, with sales down 20%. While Off-Road has bottomed, a robust recovery in cyclical first-fit markets is not yet evident and remains a risk to the outlook.
⚖️ Verdict: 🟢
Bullish. The company is executing impressively in a choppy macro environment. The strength and share gains in the Aftermarket business are more than offsetting cyclical weakness elsewhere. The robust FY26 guidance, particularly on operating margin, signals strong confidence from management and suggests the Q4 gross margin pressure is a manageable, non-structural issue.
Key Themes
Aftermarket Engine Powers Through
The high-margin Aftermarket business remains the company's core strength. Mobile Aftermarket sales grew 3.3% in Q4, contributing to the Mobile segment's record 19.1% pretax margin. Management highlighted continued share gains and new partnerships, such as with Mighty Distributing System of America, underscoring the durability of this recurring revenue stream.
Off-Road Cycle Shows Signs of Life
A significant positive development this quarter was the reversal in the Off-Road business, where sales grew 5.1% YoY after eight consecutive quarters of declines. Management commentary suggests this marks a trough in the agriculture market, a key end market for the company, potentially turning a multi-quarter headwind into a tailwind in FY26.
Gross Margin Hit by Tariffs and LIFO Accounting
The most significant negative data point was the 140 basis point drop in Q4 adjusted gross margin. Management attributed nearly all of this to 'tariff-related inflation on our LIFO inventory valuation'. While the company is confident in its ability to offset tariff costs over time through pricing and its global footprint, this quarter's result demonstrates a tangible P&L risk and contradicts the narrative of straightforward margin expansion.
Operational Discipline Drives Record Profitability
Donaldson's focus on cost control is yielding results. Adjusted operating margin reached a record 16.4% in Q4, capping a full year at a record 15.7%. The company is guiding for further expansion to a midpoint of 16.4% in FY26, which is ahead of the long-term targets set a year ago. Management projects a strong incremental margin of approximately 40% for FY26, highlighting confidence in continued operating leverage.
Life Sciences Bioprocessing Ramp Remains Elusive
Following a $62M impairment charge in Q3, the Life Sciences segment continues to be a drag on profitability. Management noted on the call that a significant revenue ramp from new bioprocessing products is likely a 'more in the 27 time frame'. The muted FY26 sales growth guidance of 1% to 5% for the segment confirms that a meaningful return on these investments remains distant.
On-Road Segment Continues to Struggle
The On-Road business remains the weakest part of the portfolio, with sales declining another 20.1% in Q4 due to lower global truck production. While FY26 guidance projects a high-single-digit rebound, this is off a very low base and the timing of a sustained recovery in the transportation market is uncertain.
Navigating the Macro Tariff Landscape
Management repeatedly addressed the 'ever-changing global tariff dynamics' as a key challenge. However, they expressed strong confidence in their mitigation strategies, which include a region-for-region global footprint, ensuring that nearly 90% of goods shipped from Mexico are USMCA qualified and exempt from tariffs, and leveraging their pricing power.
Innovation in Filtration Technology
The company continues to invest in R&D across its portfolio. Key initiatives highlighted include deploying connected solutions in the Industrial segment (projecting 30% growth in connected machines in FY26), developing new products for alternative fuels in Mobile, and launching new bioprocessing technologies like the Purexa membrane chromatography product in Life Sciences.
Other KPIs
The company returned $465 million to shareholders in FY25, consisting of $131.9 million in dividends and $333.6 million in share repurchases (4.0% of shares outstanding). The FY26 plan to repurchase another 2% to 3% of shares signals continued confidence in the business and commitment to returning cash.
Full-year free cash flow was $342 million, representing a conversion rate of 77% of adjusted net income, below the company's long-term target. However, performance improved significantly in Q4 with a quarterly conversion rate of 123%. Management guided for a return to the historical 85% to 95% range in FY26, implying better working capital management ahead.
The Industrial Solutions segment posted a record 20.9% pretax profit margin on strong sales growth of 7.7%. This was driven by a 10.5% increase in Industrial Filtration Solutions (IFS) sales from new dust collection equipment and favorable timing for Power Generation projects.
Guidance
Accelerating. The midpoint of $4.00 represents 8.7% YoY growth, an acceleration from the 7.6% growth achieved in FY25. This demonstrates confidence in continued profitability improvements.
Stable/Slightly Accelerating. The midpoint of +3% is slightly ahead of the 2.9% growth in FY25. The outlook assumes a rebound in first-fit Mobile businesses (Off-Road +mid-single digits, On-Road +high-single digits) and continued growth in Industrial, offsetting very modest growth in Life Sciences.
Accelerating. The midpoint of 16.4% represents a 70-basis point improvement over the record 15.7% achieved in FY25. This is the core of the bull case, driven by expectations for gross margin expansion and operating expense leverage on higher sales.
Decelerating. This is a significant deceleration from the 9.8% growth achieved in FY25. The muted outlook reflects continued headwinds in the bioprocessing market and a longer ramp-up for new technologies.