Quick Answer
LITTELFUSE INC /DE reported R&D Expense of $106.90 million for fiscal year 2025.
LITTELFUSE INC /DE R&D Expense — Annual History
| Fiscal Year | R&D Expense | YoY Change |
|---|---|---|
| 2025 | $106.90M | -0.8% |
| 2024 | $107.77M | +5.2% |
| 2023 | $102.43M | +7.1% |
| 2022 | $95.60M | +45.0% |
| 2021 | $65.94M | +25.5% |
| 2020 | $52.54M | -34.3% |
| 2019 | $80.00M | -8.3% |
| 2018 | $87.26M | +72.8% |
| 2017 | $50.49M | +19.6% |
| 2016 | $42.20M | +37.0% |
| 2015 | $30.80M | -1.0% |
| 2014 | $31.12M | +27.5% |
| 2013 | $24.41M | +15.0% |
| 2012 | $21.23M | +9.2% |
| 2011 | $19.44M | +10.4% |
| 2010 | $17.60M | -2.9% |
| 2009 | $18.13M | — |
Quarterly R&D Expense
| Quarter Ending | R&D Expense | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | $27.33M | +3.3% | +3.5% |
| June 30, 2025 | $26.40M | -2.7% | +1.4% |
| March 31, 2025 | $26.05M | -5.9% | -1.6% |
| September 30, 2024 | $26.47M | +3.9% | -2.5% |
| June 30, 2024 | $27.15M | +10.8% | -1.9% |
| March 31, 2024 | $27.67M | +1.4% | +8.6% |
| September 30, 2023 | $25.48M | -1.0% | +4.0% |
| June 30, 2023 | $24.50M | +4.3% | -10.2% |
- LITTELFUSE INC /DE showed a decrease of -0.8% in R&D Expense compared to the prior fiscal year.
- Over the 2009–2025 period, LITTELFUSE INC /DE’s r&d expense has grown by 489.5% (from $18.13 million to $106.90 million).
- The most recent figure is from LITTELFUSE INC /DE’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 19, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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