Littelfuse (LFUS) Q3 2026 earnings review
Littelfuse underlying sales jump 22%, while profit nearly doubles
Littelfuse, a maker of circuit-protection parts and semiconductors, grew faster across every division while factory volume lifted its profit margins. Sales from businesses owned a year ago rose 22%, and profit per share excluding one-offs nearly doubled to $5.79. Reported sales of $767 million missed the company's plan only because a one-time $28.5 million fee to rewrite a German factory contract was deducted from revenue. Chief executive Greg Henderson set a fourth-quarter plan for 28% sales growth.
| Sales from businesses owned a year ago | +22% 21% outlook (reported sales $767M, +23%) |
|---|---|
| Profit per share, excluding one-offs | $5.79 +96% from a year ago ($4.85–5.05 outlook) |
| EBITDA margin, excluding one-offs | 28.4% +6.9 percentage points from a year ago |
| Q4 sales outlook | $750–770M middle of the range: +28% (+21% underlying) |
⚖️ Verdict: 🟢 Bullish
The story got better because factory profit margins cleared a high hurdle and heavy-truck demand woke up the lagging transportation division. Electronics and industrial orders both grew 27% on an underlying basis, and commercial vehicle growth of 20% lifted transportation margins. One caution: the $28.5 million Dortmund contract fee and $6.2 million of restructuring charges show the semiconductor factory cleanup is still expensive.
The question now is whether 22% underlying growth reflects lasting demand from data centers and power grids or a temporary rush by parts distributors to refill shelves. If end-customer demand is driving orders, underlying growth will stay in the teens after the Basler acquisition passes its one-year mark in December; if it is restocking, orders will cool. First-quarter 2027 bookings and sales outlook will tell.
🐂 Bull Case
Higher Factory Volume Lifted the Profit Margin
Littelfuse makes fuses, switches and semiconductors that protect electrical circuits. Entering the quarter, a key concern was whether the manufacturer could turn new orders into enough profit to meet its third-quarter earnings plan. By our math, that plan required about 40 cents of operating profit before depreciation and one-offs (adjusted EBITDA) on every new dollar of sales, above its 30-to-35-cent target.
The Chicago-based group cleared that bar with room to spare. Excluding a one-time contract fee, adjusted EBITDA margin rose 6.9 percentage points from a year ago to 28.4%, generating 54 cents of profit on each new dollar of sales by our math. Electronics led the jump as its segment margin rose 9.1 percentage points to 33.1% on higher volume and better pricing.
- Cost of making the products: 56.4% of sales excluding one-offs, down 5.1 percentage points by our math
- Selling and overhead costs: 14.4% of sales excluding one-offs, down 1.5 percentage points by our math
- Diluted profit per share excluding one-offs: $5.79, up 96% and 74 cents above the top of the outlook
What to watch: operating margin in the fourth quarter, when sales typically dip on winter holidays. Holding diluted profit per share near the $5.15 middle of the fourth-quarter outlook would show the margin gains are sticking.
Demand Grew Across Electronics and Industrial Markets
Chief executive Greg Henderson attributed the quarter to "broad-based demand strength, disciplined execution, and continued momentum across the portfolio". Skeptics have argued that this rebound simply reflects parts distributors refilling empty shelves after a two-year slump, which could reverse quickly if orders cool. Instead, sales from businesses owned a year ago rose 22%, beating the 21% plan as both semiconductor and industrial orders accelerated.
Growth spread well beyond data centers. Passive electronics (components like resistors and capacitors that do not require an external power source) grew 30% on an underlying basis, while power and protection semiconductors rose 24%. Industrial underlying sales jumped 27% on utility grid, heating and cooling, and factory automation demand, and Basler Electric (the grid-control business acquired in December 2025) added another 38 percentage points.
In its presentation, the circuit-protection maker said it "Entered Q4 with momentum following record Q3 bookings" (customer orders received) and set a fourth-quarter plan for 21% underlying growth. By our math, Basler contributed about $36 million in the third quarter and will add a similar amount in the fourth, beating what the earlier full-year Basler outlook implied for the second half.
What to watch: underlying sales growth in the first quarter of 2027, once the Basler acquisition passes its one-year mark in December. Holding growth in the mid-teens against tougher comparisons would show customer demand goes beyond shelf restocking.
Commercial Vehicles Lifted the Transportation Business
Transportation has been the weak spot for two years, with underlying sales growing just 1% in each of the first two quarters of 2026 and segment profit margins shrinking last quarter. In the third quarter, Transportation underlying sales rose 7% to $182.6 million, and segment adjusted EBITDA margin rebounded 2.8 percentage points from a year ago to 19.6%.
Commercial vehicle products carried the division, growing 20% on an underlying basis to $96.0 million. Littelfuse said the gain came from "improved truck, data center, material handling, construction and agricultural equipment demand". That volume lifted factory utilization and overcame ongoing declines in the passenger car unit, though one quarter of growth only fades the standing concern rather than settling it.
What to watch: commercial vehicle underlying sales growth next quarter. A second quarter of double-digit growth alongside segment adjusted EBITDA margin near 20% would confirm the heavy-truck and equipment recovery is durable.
🐻 Bear Case
Dortmund Wafer Plant Cost Another $28.5 Million
Henderson highlighted disciplined execution across the portfolio, and the company removes restructuring and contract fees from its preferred profit numbers. Yet fixing the semiconductor manufacturing footprint keeps generating cash and accounting charges. This quarter, the group took a $28.5 million reduction to reported revenue for a one-time contract amendment fee at its Dortmund, Germany wafer plant, pulling reported sales below its $780–800 million plan.
Littelfuse said the payment was for "increasing the Company’s ability to optimize the Dortmund Semiconductor GmbH asset over time" by simplifying legacy customer contracts. On top of that fee, the income statement carried $6.2 million of restructuring and impairment charges, bringing nine-month restructuring and impairment costs to $33.7 million after a $301.2 million semiconductor goodwill write-off in late 2025.
What to watch: the promised dollar savings target for the 2027 closure of the Allen, Texas semiconductor plant in the fourth-quarter report. Failing to give a concrete savings figure after $33.7 million of charges this year would leave the payback unclear.
Passenger Car and Sensor Sales Kept Falling
While heavy trucks recovered, the passenger vehicle side of the Transportation division went backwards. Underlying sales in the passenger vehicle business fell 5% from a year ago, hurt by "lower global passenger car builds and auto sensor product declines". Even though Littelfuse won more electrical content per vehicle, slower car production and sensor exits outweighed those gains.
- Passenger car products: $73.3 million, down 3% from a year ago on an underlying basis
- Automotive sensor products: $13.3 million, down 13% on an underlying basis (down 14% reported)
- Nine-month automotive sensor underlying sales: down 11% from a year ago
What to watch: automotive sensor sales in the fourth quarter. A smaller drop than this quarter's 13% underlying decline would show the deliberate exit from lower-margin car sensors is finally nearing its end.
Risks this quarter didn't answer
Four standing concerns from prior quarters received no new figures in the third-quarter earnings release or presentation slides.
- Customer fuse recall: no update in the release on the potential cost of the customer recall disclosed in last quarter's filing; the third-quarter 10-Q filing will show if an accrual was booked.
- Data center revenue size: management cites data center growth across segments, but still does not disclose total data center sales in dollars ahead of the 2027 high-voltage transition.
- Metal cost lags: higher silver, copper and gold prices were offset by customer price increases this quarter, leaving any fourth-quarter timing lag to the call.
- Unannounced acquisitions for 2030: reaching the $4.5 billion 2030 sales target requires roughly 5 percentage points of yearly acquired growth, and Basler passes its one-year mark in December.
💲 Other KPIs
Free cash flow — operating cash flow minus factory equipment purchases — rose 64% from a year ago to $215.7 million. That equals 187% of reported net income in the quarter and brings nine-month free cash flow to $409.2 million, up 66% on strong profit growth and tight capital spending of just 1.9% of sales.
Net debt as defined in the credit agreement fell from $493.8 million last quarter and $463.2 million a year ago. The electronics maker paid down $166.3 million on its credit line over the first nine months, lowering its debt-to-EBITDA ratio to 0.7x, while spending nothing on share buybacks.
Uncollected customer bills rose 17.2% from a year ago to $438.1 million, and inventory rose 11.9% to $444.0 million by our math. Both grew slower than the 22.7% rise in reported sales, showing that working capital remained under control as shipments ramped.
🔮 Guidance
New. The middle of the range ($760 million) points to 28% growth from a year ago, including 21% from businesses owned a year ago, 6% from Basler, and 1% from currency. That represents a 4.4% drop from third-quarter sales excluding the Dortmund fee by our math, on normal winter seasonality. If the six-quarter average beat of 3.1% holds, sales would land near $784 million by our math.
New. The $5.15 middle of the range is up 91% from $2.69 a year ago, when higher bonus accruals weighed on profit, and down 11% from the third quarter's $5.79 on seasonally lower sales and higher variable compensation.
New. Management expects the tax rate excluding one-offs to rise to about 24%, up from 21.8% in the third quarter and 18.4% in the fourth quarter of last year.
❓ Key Questions
What will the Dortmund contract change add to semiconductor profit?
Littelfuse gave up $28.5 million of revenue to amend a legacy customer contract at its Dortmund wafer plant. Investors need to know how much annual profit that new flexibility will generate and when the payback begins.
How much will closing the Allen, Texas factory save?
Nine-month restructuring and impairment charges reached $33.7 million as the company prepares to close its Allen, Texas power semiconductor plant in 2027. Management still has not shared a dollar or margin savings target for that closure.
How big is the data center business in dollars today?
Data center demand is helping drive 27% underlying growth in Industrial and 20% in Commercial Vehicles, ahead of a planned 2027 shift to higher-voltage systems. Without a dollar revenue base, outsiders cannot size that boost.
Has the customer fuse recall cost been estimated yet?
Last quarter's filing flagged a potential customer product recall involving Littelfuse fuses with no estimated loss range. The earnings release did not mention it, leaving the update to the quarterly 10-Q filing.