LITTELFUSE INC /DE Research and Development Expense
LITTELFUSE INC /DE (LFUS) reported Research and Development Expense of $29.74 million for the 3-month period ending 2026-03-28, per its 10-Q filed 2026-05-06.
Financial Statements › Expense Statement › Operating Expenses
us-gaap:ResearchAndDevelopmentExpense · last filed 2026-05-06
- LITTELFUSE INC /DE research and development expense for the quarter ending 2026-03-28 was $29.74M, a 14.16% increase year-over-year.
- LITTELFUSE INC /DE research and development expense for the quarter ending 2025-12-27 was $27.12M, a 2.37% increase year-over-year.
- LITTELFUSE INC /DE research and development expense for the quarter ending 2025-09-27 was $27.33M, a 3.26% increase year-over-year.
- LITTELFUSE INC /DE research and development expense for the quarter ending 2025-06-28 was $26.40M, a 2.74% decline year-over-year.
- LITTELFUSE INC /DE research and development expense for fiscal 2025 was $106.90M, a 0.81% decline from fiscal 2024.
- LITTELFUSE INC /DE research and development expense for fiscal 2024 was $107.77M, a 5.22% increase from fiscal 2023.
- LITTELFUSE INC /DE research and development expense for fiscal 2023 was $102.43M, a 7.14% increase from fiscal 2022.
- LITTELFUSE INC /DE research and development expense for fiscal 2022 was $95.60M, a 44.98% increase from fiscal 2022.
| Period end | Research and Development Expense 3 month | Research and Development Expense 3 month as first filed | Research and Development Expense 6 month | Research and Development Expense 6 month as first filed | Research and Development Expense 9 month | Research and Development Expense 9 month as first filed | Research and Development Expense 12 month | Research and Development Expense 12 month as first filed |
|---|---|---|---|---|---|---|---|---|
| 2026-03-28 | $29.74M 10-Q · filed 2026-05-06 | $56.85M derived: sum of 2 quarters · filed 2026-05-06 | $84.19M derived: sum of 3 quarters · filed 2026-05-06 | $110.59M derived: sum of 4 quarters · filed 2026-05-06 | ||||
| 2025-12-27 | $27.12M derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-19 | $54.45M derived: sum of 2 quarters · filed 2026-02-19 | $80.85M derived: sum of 3 quarters · filed 2026-02-19 | $106.90M 10-K · filed 2026-02-19 | ||||
| 2025-09-27 | $27.33M 10-Q · filed 2025-10-29 | $53.73M derived: sum of 2 quarters · filed 2025-10-29 | $79.78M 10-Q · filed 2025-10-29 | $106.27M derived: sum of 4 quarters · filed 2026-05-06 | ||||
| 2025-06-28 | $26.40M 10-Q · filed 2025-07-30 | $52.45M 10-Q · filed 2025-07-30 | $78.94M derived: sum of 3 quarters · filed 2026-05-06 | $105.41M derived: sum of 4 quarters · filed 2026-05-06 | ||||
| 2025-03-29 | $26.05M 10-Q · filed 2026-05-06 | $52.54M derived: sum of 2 quarters · filed 2026-05-06 | $79.01M derived: sum of 3 quarters · filed 2026-05-06 | $106.15M derived: sum of 4 quarters · filed 2026-05-06 | ||||
| 2024-12-28 | $26.49M derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-19 | $52.96M derived: sum of 2 quarters · filed 2026-02-19 | $80.11M derived: sum of 3 quarters · filed 2026-02-19 | $107.77M 10-K · filed 2026-02-19 | ||||
| 2024-09-28 | $26.47M 10-Q · filed 2025-10-29 | $53.62M derived: sum of 2 quarters · filed 2025-10-29 | $81.28M 10-Q · filed 2025-10-29 | $106.44M derived: sum of 4 quarters · filed 2026-02-19 | ||||
| 2024-06-29 | $27.15M 10-Q · filed 2025-07-30 | $54.81M 10-Q · filed 2025-07-30 | $79.97M derived: sum of 3 quarters · filed 2026-02-19 | $105.46M derived: sum of 4 quarters · filed 2026-02-19 | ||||
| 2024-03-30 | $27.67M 10-Q · filed 2025-04-30 | $52.83M derived: sum of 2 quarters · filed 2026-02-19 | $78.31M derived: sum of 3 quarters · filed 2026-02-19 | $102.81M derived: sum of 4 quarters · filed 2026-02-19 | ||||
| 2023-12-30 | $25.16M derived: 10-K 12 month − 10-Q 9 month · filed 2026-02-19 | $50.64M derived: sum of 2 quarters · filed 2026-02-19 | $75.14M derived: sum of 3 quarters · filed 2026-02-19 | $102.43M 10-K · filed 2026-02-19 | ||||
| 2023-09-30 | $25.48M 10-Q · filed 2024-10-30 | $49.98M derived: sum of 2 quarters · filed 2024-10-30 | $77.27M 10-Q · filed 2024-10-30 | $104.08M derived: sum of 4 quarters · filed 2025-03-13 | ||||
| 2023-07-01 | $24.50M 10-Q · filed 2024-07-31 | $51.79M 10-Q · filed 2024-07-31 | $78.59M derived: sum of 3 quarters · filed 2025-03-13 | $104.34M derived: sum of 4 quarters · filed 2025-03-13 | ||||
| 2023-04-01 | $27.29M 10-Q · filed 2024-05-01 | $54.10M derived: sum of 2 quarters · filed 2025-03-13 | $79.85M derived: sum of 3 quarters · filed 2025-03-13 | $103.34M derived: sum of 4 quarters · filed 2025-03-13 | ||||
| 2022-12-31 | $26.81M derived: 10-K 12 month − 10-Q 9 month · filed 2025-03-13 | $52.56M derived: sum of 2 quarters · filed 2025-03-13 | $76.05M derived: sum of 3 quarters · filed 2025-03-13 | $95.60M 10-K · filed 2025-03-13 | ||||
| 2022-10-01 | $25.75M 10-Q · filed 2023-11-01 | $49.24M derived: sum of 2 quarters · filed 2023-11-01 | $68.80M 10-Q · filed 2023-11-01 | $87.82M derived: sum of 4 quarters · filed 2024-02-16 | ||||
| 2022-07-02 | $23.49M 10-Q · filed 2023-08-02 | $43.04M 10-Q · filed 2023-08-02 | $62.07M derived: sum of 3 quarters · filed 2024-02-16 | $77.85M derived: sum of 4 quarters · filed 2024-02-16 | ||||
| 2022-04-02 | $19.56M 10-Q · filed 2023-05-03 | $38.58M derived: sum of 2 quarters · filed 2024-02-16 | $54.36M derived: sum of 3 quarters · filed 2024-02-16 | $70.76M derived: sum of 4 quarters · filed 2024-02-16 | ||||
| 2022-01-01 | $19.03M derived: 10-K 12 month − 10-Q 9 month · filed 2024-02-16 | $34.81M derived: sum of 2 quarters · filed 2024-02-16 | $51.20M derived: sum of 3 quarters · filed 2024-02-16 | $65.94M 10-K · filed 2024-02-16 | ||||
| 2021-09-25 | $15.78M 10-Q · filed 2022-11-02 | $32.17M derived: sum of 2 quarters · filed 2022-11-02 | $46.91M 10-Q · filed 2022-11-02 | $58.86M derived: sum of 4 quarters · filed 2023-02-16 | ||||
| 2021-06-26 | $16.39M 10-Q · filed 2022-08-03 | $31.13M 10-Q · filed 2022-08-03 | $43.08M derived: sum of 3 quarters · filed 2023-02-16 | $56.05M derived: sum of 4 quarters · filed 2023-02-16 | ||||
| 2021-03-27 | $14.74M 10-Q · filed 2022-05-04 | $26.69M derived: sum of 2 quarters · filed 2023-02-16 | $39.65M derived: sum of 3 quarters · filed 2023-02-16 | $52.81M derived: sum of 4 quarters · filed 2023-02-16 | ||||
| 2020-12-26 | $11.95M derived: 10-K 12 month − 10-Q 9 month · filed 2023-02-16 | $24.91M derived: sum of 2 quarters · filed 2023-02-16 | $38.08M derived: sum of 3 quarters · filed 2023-02-16 | $52.54M 10-K · filed 2023-02-16 | ||||
| 2020-09-26 | $12.96M 10-Q · filed 2021-10-27 | $13.05M 10-Q · filed 2020-10-28 | $26.12M derived: sum of 2 quarters · filed 2021-10-27 | $40.59M 10-Q · filed 2021-10-27 | $41.04M 10-Q · filed 2020-10-28 | $57.99M derived: sum of 4 quarters · filed 2022-02-17 | ||
| 2020-06-27 | $13.16M 10-Q · filed 2021-07-28 | $13.40M 10-Q · filed 2020-07-29 | $27.62M 10-Q · filed 2021-07-28 | $28.00M 10-Q · filed 2020-07-29 | $45.03M derived: sum of 3 quarters · filed 2022-02-17 | $64.75M derived: sum of 4 quarters · filed 2022-02-17 | ||
| 2020-03-28 | $14.46M 10-Q · filed 2021-04-28 | $14.60M 10-Q · filed 2020-04-29 | $31.86M derived: sum of 2 quarters · filed 2022-02-17 | $51.59M derived: sum of 3 quarters · filed 2022-02-17 | $73.05M derived: sum of 4 quarters · filed 2022-02-17 | |||
| 2019-12-28 | $17.40M derived: 10-K 12 month − 10-Q 9 month · filed 2022-02-17 | $37.13M derived: sum of 2 quarters · filed 2022-02-17 | $58.59M derived: sum of 3 quarters · filed 2022-02-17 | $80.00M 10-K · filed 2022-02-17 | $80.54M 10-K · filed 2020-02-21 | |||
| 2019-09-28 | $19.73M 10-Q · filed 2020-10-28 | $41.19M derived: sum of 2 quarters · filed 2020-10-28 | $62.59M 10-Q · filed 2020-10-28 | $84.12M derived: sum of 4 quarters · filed 2021-02-18 | ||||
| 2019-06-29 | $21.46M 10-Q · filed 2020-07-29 | $42.87M 10-Q · filed 2020-07-29 | $64.39M derived: sum of 3 quarters · filed 2021-02-18 | $84.84M derived: sum of 4 quarters · filed 2021-02-18 | ||||
| 2019-03-30 | $21.41M 10-Q · filed 2020-04-29 | $42.93M derived: sum of 2 quarters · filed 2021-02-18 | $63.38M derived: sum of 3 quarters · filed 2021-02-18 | $86.13M derived: sum of 4 quarters · filed 2021-02-18 | ||||
| 2018-12-29 | $21.52M derived: 10-K 12 month − 10-Q 9 month · filed 2021-02-18 | $41.98M derived: sum of 2 quarters · filed 2021-02-18 | $64.72M derived: sum of 3 quarters · filed 2021-02-18 | $87.26M 10-K · filed 2021-02-18 | $87.30M 10-K · filed 2019-02-22 | |||
| 2018-09-29 | $20.45M 10-Q · filed 2019-10-30 | $43.20M derived: sum of 2 quarters · filed 2019-10-30 | $65.74M 10-Q · filed 2019-10-30 | $79.36M derived: sum of 4 quarters · filed 2020-02-21 | ||||
| 2018-06-30 | $22.75M 10-Q · filed 2019-07-31 | $45.29M 10-Q · filed 2019-07-31 | $58.91M derived: sum of 3 quarters · filed 2020-02-21 | $70.90M derived: sum of 4 quarters · filed 2020-02-21 | ||||
| 2018-03-31 | $22.54M 10-Q · filed 2019-05-01 | $36.16M derived: sum of 2 quarters · filed 2020-02-21 | $48.15M derived: sum of 3 quarters · filed 2020-02-21 | $60.88M derived: sum of 4 quarters · filed 2020-02-21 | ||||
| 2017-12-30 | $13.62M derived: 10-K 12 month − 10-Q 9 month · filed 2020-02-21 | $25.61M derived: sum of 2 quarters · filed 2020-02-21 | $38.34M derived: sum of 3 quarters · filed 2020-02-21 | $50.49M 10-K · filed 2020-02-21 | ||||
| 2017-09-30 | $11.99M 10-Q · filed 2018-10-31 | $24.72M derived: sum of 2 quarters · filed 2018-10-31 | $36.87M 10-Q · filed 2018-10-31 | $48.19M derived: sum of 4 quarters · filed 2019-02-22 | ||||
| 2017-07-01 | $12.73M 10-Q · filed 2018-08-01 | $24.88M 10-Q · filed 2018-08-01 | $36.19M derived: sum of 3 quarters · filed 2019-02-22 | $46.60M derived: sum of 4 quarters · filed 2019-02-22 | ||||
| 2017-04-01 | $12.15M 10-Q · filed 2018-05-02 | $23.46M derived: sum of 2 quarters · filed 2019-02-22 | $33.87M derived: sum of 3 quarters · filed 2019-02-22 | $45.78M derived: sum of 4 quarters · filed 2019-02-22 | ||||
| 2016-12-31 | $11.31M derived: 10-K 12 month − 10-Q 9 month · filed 2019-02-22 | $21.72M derived: sum of 2 quarters · filed 2019-02-22 | $33.63M derived: sum of 3 quarters · filed 2019-02-22 | $42.20M 10-K · filed 2019-02-22 | ||||
| 2016-10-01 | $10.40M 10-Q · filed 2017-11-01 | $22.32M derived: sum of 2 quarters · filed 2017-11-01 | $30.88M 10-Q · filed 2017-11-01 | $39.46M derived: sum of 4 quarters · filed 2018-02-23 | ||||
| 2016-07-02 | $11.92M 10-Q · filed 2017-08-02 | $20.48M 10-Q · filed 2017-08-02 | $29.06M derived: sum of 3 quarters · filed 2018-02-23 | $36.54M derived: sum of 4 quarters · filed 2018-02-23 | ||||
| 2016-04-02 | $8.56M 10-Q · filed 2017-05-03 | $17.14M derived: sum of 2 quarters · filed 2018-02-23 | $24.62M derived: sum of 3 quarters · filed 2018-02-23 | $31.98M derived: sum of 4 quarters · filed 2018-02-23 | ||||
| 2016-01-02 | $8.58M derived: 10-K 12 month − 10-Q 9 month · filed 2018-02-23 | $16.06M derived: sum of 2 quarters · filed 2018-02-23 | $23.42M derived: sum of 3 quarters · filed 2018-02-23 | $30.80M 10-K · filed 2016-03-01 | ||||
| 2015-09-26 | $7.48M 10-Q · filed 2016-11-04 | $14.84M derived: sum of 2 quarters · filed 2016-11-04 | $22.22M 10-Q · filed 2016-11-04 | $30.51M derived: sum of 4 quarters · filed 2017-02-27 | ||||
| 2015-06-27 | $7.36M 10-Q · filed 2016-08-05 | $14.74M 10-Q · filed 2016-08-05 | $23.03M derived: sum of 3 quarters · filed 2017-02-27 | $30.48M derived: sum of 4 quarters · filed 2017-02-27 | ||||
| 2015-03-28 | $7.38M 10-Q · filed 2016-05-06 | $15.67M derived: sum of 2 quarters · filed 2017-02-27 | $23.12M derived: sum of 3 quarters · filed 2017-02-27 | $30.93M derived: sum of 4 quarters · filed 2017-02-27 | ||||
| 2014-12-27 | $8.29M derived: 10-K 12 month − 10-Q 9 month · filed 2017-02-27 | $15.74M derived: sum of 2 quarters · filed 2017-02-27 | $23.55M derived: sum of 3 quarters · filed 2017-02-27 | $31.12M 10-K · filed 2017-02-27 | ||||
| 2014-09-27 | $7.45M 10-Q · filed 2015-10-30 | $15.26M derived: sum of 2 quarters · filed 2015-10-30 | $22.83M 10-Q · filed 2015-10-30 | $29.52M derived: sum of 4 quarters · filed 2016-03-01 | ||||
| 2014-06-28 | $7.81M 10-Q · filed 2015-07-31 | $15.38M 10-Q · filed 2015-07-31 | $22.07M derived: sum of 3 quarters · filed 2016-03-01 | $28.29M derived: sum of 4 quarters · filed 2016-03-01 | ||||
| 2014-03-29 | $7.57M 10-Q · filed 2015-05-01 | $14.26M derived: sum of 2 quarters · filed 2016-03-01 | $20.48M derived: sum of 3 quarters · filed 2016-03-01 | $26.27M derived: sum of 4 quarters · filed 2016-03-01 | ||||
| 2013-12-28 | $6.69M derived: 10-K 12 month − 10-Q 9 month · filed 2016-03-01 | $12.91M derived: sum of 2 quarters · filed 2016-03-01 | $18.70M derived: sum of 3 quarters · filed 2016-03-01 | $24.41M 10-K · filed 2016-03-01 | ||||
| 2013-09-28 | $6.22M 10-Q · filed 2014-10-31 | $12.01M derived: sum of 2 quarters · filed 2014-10-31 | $17.73M 10-Q · filed 2014-10-31 | $23.40M derived: sum of 4 quarters · filed 2015-02-24 | ||||
| 2013-06-29 | $5.79M 10-Q · filed 2014-08-01 | $11.51M 10-Q · filed 2014-08-01 | $17.19M derived: sum of 3 quarters · filed 2015-02-24 | $22.69M derived: sum of 4 quarters · filed 2015-02-24 | ||||
| 2013-03-30 | $5.71M 10-Q · filed 2014-05-02 | $11.39M derived: sum of 2 quarters · filed 2015-02-24 | $16.90M derived: sum of 3 quarters · filed 2015-02-24 | $21.79M derived: sum of 4 quarters · filed 2015-02-24 | ||||
| 2012-12-29 | $5.68M derived: 10-K 12 month − 10-Q 9 month · filed 2015-02-24 | $11.18M derived: sum of 2 quarters · filed 2015-02-24 | $16.07M derived: sum of 3 quarters · filed 2015-02-24 | $21.23M 10-K · filed 2015-02-24 | ||||
| 2012-09-29 | $5.50M 10-Q · filed 2013-11-01 | $10.39M derived: sum of 2 quarters · filed 2013-11-01 | $15.55M 10-Q · filed 2013-11-01 | $20.24M derived: sum of 4 quarters · filed 2014-07-23 | ||||
| 2012-06-30 | $4.89M 10-Q · filed 2013-08-02 | $10.05M 10-Q · filed 2013-08-02 | $14.73M derived: sum of 3 quarters · filed 2014-07-23 | $20.03M derived: sum of 4 quarters · filed 2014-07-23 | ||||
| 2012-03-31 | $5.16M 10-Q/A · filed 2014-02-18 | $9.85M derived: sum of 2 quarters · filed 2014-07-23 | $15.14M derived: sum of 3 quarters · filed 2014-07-23 | $19.80M derived: sum of 4 quarters · filed 2014-07-23 | ||||
| 2011-12-31 | $4.68M derived: 10-K 12 month − 10-Q 9 month · filed 2014-07-23 | $9.98M derived: sum of 2 quarters · filed 2014-07-23 | $14.64M derived: sum of 3 quarters · filed 2014-07-23 | $19.44M 10-K · filed 2014-07-23 | ||||
| 2011-10-01 | $5.30M 10-Q · filed 2012-11-02 | $9.96M derived: sum of 2 quarters · filed 2012-11-02 | $14.75M 10-Q · filed 2012-11-02 | $19.66M derived: sum of 4 quarters · filed 2013-02-27 | ||||
| 2011-07-02 | $4.66M 10-Q · filed 2012-08-03 | $9.46M 10-Q · filed 2012-08-03 | $14.36M derived: sum of 3 quarters · filed 2013-02-27 | $18.71M derived: sum of 4 quarters · filed 2013-02-27 | ||||
| 2011-04-02 | $4.79M 10-Q · filed 2012-05-03 | $9.70M derived: sum of 2 quarters · filed 2013-02-27 | $14.04M derived: sum of 3 quarters · filed 2013-02-27 | $18.45M derived: sum of 4 quarters · filed 2013-02-27 | ||||
| 2011-01-01 | $4.90M derived: 10-K 12 month − 10-Q 9 month · filed 2013-02-27 | $9.25M derived: sum of 2 quarters · filed 2013-02-27 | $13.65M derived: sum of 3 quarters · filed 2013-02-27 | $17.60M 10-K · filed 2013-02-27 | ||||
| 2010-10-02 | $4.34M 10-Q · filed 2011-11-03 | $8.75M derived: sum of 2 quarters · filed 2011-11-03 | $12.70M 10-Q · filed 2011-11-03 | |||||
| 2010-07-03 | $4.40M 10-Q · filed 2011-08-09 | $8.35M 10-Q · filed 2011-08-09 | ||||||
| 2010-01-02 | $18.13M 10-K · filed 2012-02-24 |
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