LITTELFUSE INC /DE (LFUS) Spending and interest coverage
- R&D / revenue · 12 months: Value (m); Formula and calculation Research and development expense / revenue. Period ending 2026-03-28..
- Stock-based compensation / revenue · 12 months: Value (m); Formula and calculation Share-based compensation / revenue. Period ending 2026-03-28..
- Interest coverage · 12 months: Value (m); Formula and calculation Estimated: average term debt × dated USD coupon proxy + average commercial paper × matching-currency disclosed rate at or before period end. Swaps, foreign-exchange, lease interest and amortization are not quantified..
Spending and interest coverage
Overview →Financial period ending 2026-03-28; current quote (m). Amounts retain their stated periods and units.
| Metric | Value | Formula and calculation |
|---|---|---|
| R&D / revenue · 12 months | (m) | Research and development expense / revenue. Period ending 2026-03-28. Calculation unavailable: missing inputs remain (m). |
| Stock-based compensation / revenue · 12 months | (m) | Share-based compensation / revenue. Period ending 2026-03-28. Calculation unavailable: missing inputs remain (m). |
| Interest coverage · 12 months | (m) | Estimated: average term debt × dated USD coupon proxy + average commercial paper × matching-currency disclosed rate at or before period end. Swaps, foreign-exchange, lease interest and amortization are not quantified. Calculation unavailable: missing inputs remain (m). |
Calculation inputs
| Input | Amount with unit | Raw financial data |
|---|---|---|
| Research and development spending | 110.59M USD | Research and Development Expense |
| Revenue | (m) | |
| Stock-based compensation | 28.12M USD | Share-based Payment Arrangement, Noncash Expense |
| Operating income | 68.54M USD | Operating Income (Loss) |
| Interest expense · reported / estimated | (m) | Interest Expense · Estimated expense assumptions |
Latest interest expense basis: (m). Estimated values carry *; expand each history row’s basis for its dated balances and rate assumptions.
Calculated history
Changes compare with the next older row (previous quarter), unless explicitly labeled otherwise. Rolling 12-month growth compares two successive quarter-end rolling totals; it is not year-over-year growth.
| Period ending | Research and development spending (USD) | Revenue (USD) | Stock-based compensation (USD) | Operating income (USD) | Interest expense · reported / estimated (USD) | R&D / revenue | SBC / revenue | Interest coverage | Interest expense basis |
|---|---|---|---|---|---|---|---|---|---|
| 2026-03-28 | $110.59M | (m) | $28.12M | $68.54M | (m) | (m) | (m) | (m) | (m) |
| 2025-12-27 | $106.90M | (m) | $27.30M | $37.53M | (m) | (m) | (m) | (m) | (m) |
| 2025-09-27 | $106.27M | (m) | $26.32M | $210.84M | (m) | (m) | (m) | (m) | (m) |
| 2025-06-28 | $105.41M | (m) | $22.57M | $201.25M | (m) | (m) | (m) | (m) | (m) |
| 2025-03-29 | $106.15M | (m) | $27.25M | $173.98M | (m) | (m) | (m) | (m) | (m) |
| 2024-12-28 | $107.77M | (m) | $26.01M | $158.78M | (m) | (m) | (m) | (m) | (m) |
| 2024-09-28 | $106.44M | (m) | $25.19M | $272.80M | (m) | (m) | (m) | (m) | (m) |
| 2024-06-29 | $105.46M | (m) | $24.51M | $278.63M | (m) | (m) | (m) | (m) | (m) |
| 2024-03-30 | $102.81M | (m) | $23.79M | $305.17M | $39.83M | (m) | (m) | 7.66× | Reported |
| 2023-12-30 | $102.43M | (m) | $23.90M | $360.86M | $39.87M | (m) | (m) | 9.05× | Reported |
| 2023-09-30 | $104.08M | (m) | $24.03M | $390.54M | $38.95M | (m) | (m) | 10.03× | Reported |
| 2023-07-01 | $104.34M | (m) | $24.63M | $418.77M | $37.25M | (m) | (m) | 11.24× | Reported |
| 2023-04-01 | $103.34M | (m) | $23.47M | $460.88M | $31.56M | (m) | (m) | 14.60× | Reported |
| 2022-12-31 | $95.60M | (m) | $23.63M | $500.83M | $26.22M | (m) | (m) | 19.10× | Reported |
| 2022-10-01 | $87.82M | (m) | $23.33M | $499.42M | $21.70M | (m) | (m) | 23.02× | Reported |
| 2022-07-02 | $77.85M | (m) | $22.64M | $497.66M | $17.90M | (m) | (m) | 27.81× | Reported |
| 2022-04-02 | $70.76M | (m) | $20.10M | $459.75M | $18.16M | (m) | (m) | 25.32× | Reported |
| 2022-01-01 | $65.94M | (m) | $19.61M | $385.64M | $18.53M | (m) | (m) | 20.82× | Reported |
| 2021-09-25 | $58.86M | (m) | $19.59M | $357.86M | $18.72M | (m) | (m) | 19.12× | Reported |
| 2021-06-26 | $56.05M | (m) | $19.52M | $302.31M | $19.10M | (m) | (m) | 15.83× | Reported |
| 2021-03-27 | $52.81M | (m) | $18.56M | $194.10M | $20.33M | (m) | (m) | 9.55× | Reported |
| 2020-12-26 | $52.54M | (m) | $18.13M | $162.37M | $21.08M | (m) | (m) | 7.70× | Reported |
| 2020-09-26 | $58.99M | (m) | $17.85M | $129.68M | $21.69M | (m) | (m) | 5.98× | Reported |
| 2020-06-27 | $65.67M | (m) | $17.65M | $112.28M | $22.26M | (m) | (m) | 5.04× | Reported |
| 2020-03-28 | $73.72M | (m) | $18.05M | $176.87M | $22.00M | (m) | (m) | 8.04× | Reported |
| 2019-12-28 | $80.54M | (m) | $19.05M | $192.79M | $22.27M | (m) | (m) | 8.66× | Reported |
| 2019-09-28 | $84.15M | (m) | $20.02M | $212.10M | $22.42M | (m) | (m) | 9.46× | Reported |
| 2019-06-29 | $84.88M | (m) | $23.80M | $241.16M | $22.64M | (m) | (m) | 10.65× | Reported |
| 2019-03-30 | $86.17M | (m) | $22.68M | $248.15M | $22.83M | (m) | (m) | 10.87× | Reported |
| 2018-12-29 | $87.30M | (m) | $27.43M | $225.05M | $22.57M | (m) | (m) | 9.97× | Reported |
| 2018-09-29 | $79.36M | (m) | $27.03M | $224.20M | $20.49M | (m) | (m) | 10.94× | Reported |
| 2018-06-30 | $70.90M | (m) | $23.61M | $206.58M | $18.18M | (m) | (m) | 11.36× | Reported |
| 2018-03-31 | $60.88M | (m) | $21.45M | $207.23M | $15.68M | (m) | (m) | 13.21× | Reported |
| 2017-12-30 | $50.49M | $1.22B | $16.32M | $218.51M | $13.38M | 4.13% | 1.34% | 16.33× | Reported |
| 2017-09-30 | $48.19M | $1.20B | $15.26M | $208.72M | $12.21M | 4.01% | 1.27% | 17.09× | Reported |
| 2017-07-01 | $46.60M | $1.16B | $14.45M | $177.64M | $11.31M | 4.00% | 1.24% | 15.70× | Reported |
| 2017-04-01 | $45.78M | $1.12B | $13.37M | $147.07M | $9.70M | 4.08% | 1.19% | 15.16× | Reported |
| 2016-12-31 | $42.20M | $1.06B | $11.99M | $130.64M | $8.63M | 4.00% | 1.13% | 15.14× | Reported |
| 2016-10-01 | (m) | $991.66M | (m) | $119.51M | (m) | (m) | (m) | (m) | (m) |
| 2016-07-02 | (m) | $926.84M | (m) | $100.57M | $5.71M | (m) | (m) | 17.62× | Reported |
| 2016-04-02 | (m) | $876.95M | (m) | $107.04M | $4.99M | (m) | (m) | 21.47× | Reported |
| 2016-01-02 | $30.80M | (m) | $10.27M | (m) | (m) | (m) | (m) | (m) | (m) |
| 2015-09-26 | $30.51M | $854.46M | $9.90M | $100.69M | $4.19M | 3.57% | 1.16% | 24.04× | Reported |
| 2015-06-27 | $30.48M | $856.56M | $9.60M | $132.24M | $4.56M | 3.56% | 1.12% | 29.01× | Reported |
| 2015-03-28 | $30.93M | $855.45M | $9.41M | $129.79M | $4.84M | 3.62% | 1.10% | 26.83× | Reported |
| 2014-12-27 | $31.12M | $852.00M | $9.07M | $133.83M | $4.90M | 3.65% | 1.06% | 27.30× | Reported |
| 2014-09-27 | $29.52M | $843.50M | $8.75M | $140.26M | $4.69M | 3.50% | 1.04% | 29.88× | Reported |
| 2014-06-28 | $28.29M | $826.94M | $9.28M | $137.69M | $4.34M | 3.42% | 1.12% | 31.72× | Reported |
| 2014-03-29 | $26.27M | $793.79M | $8.29M | $135.35M | $3.76M | 3.31% | 1.04% | 36.03× | Reported |
| 2013-12-31 | (m) | $757.85M | (m) | $129.88M | $2.92M | (m) | (m) | 44.53× | Reported |
| 2013-12-28 | $24.41M | $757.85M | $8.61M | $129.88M | $2.92M | 3.22% | 1.14% | 44.53× | Reported |
| 2013-09-28 | $23.40M | $718.52M | $8.80M | $115.08M | $2.36M | 3.26% | 1.23% | 48.72× | Reported |
| 2013-06-29 | $22.69M | $690.17M | $8.19M | $108.45M | $1.88M | 3.29% | 1.19% | 57.78× | Reported |
| 2013-03-30 | $21.79M | $678.25M | $7.76M | $109.16M | $1.65M | 3.21% | 1.14% | 66.00× | Reported |
| 2012-12-31 | (m) | $667.91M | (m) | $106.87M | $1.70M | (m) | (m) | 62.83× | Reported |
| 2012-12-29 | $21.23M | $667.91M | $7.35M | $106.87M | $1.70M | 3.18% | 1.10% | 62.83× | Reported |
| 2012-09-29 | $20.24M | $656.31M | $6.88M | $106.97M | $1.72M | 3.08% | 1.05% | 62.27× | Reported |
| 2012-06-30 | $20.03M | $657.61M | $6.49M | $105.61M | $1.68M | 3.05% | 0.99% | 62.94× | Reported |
| 2012-03-31 | $19.80M | $658.37M | (m) | $108.81M | $1.78M | 3.01% | (m) | 61.20× | Reported |
| 2011-12-31 | $19.44M | $664.96M | $5.80M | $113.90M | $1.69M | 2.92% | 0.87% | 67.36× | Reported |
| 2011-10-01 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2011-07-02 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2011-04-02 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2011-01-01 | $17.60M | $608.02M | $5.24M | $107.57M | $1.44M | 2.89% | 0.86% | 74.86× | Reported |
| 2010-10-02 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2010-07-03 | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) | (m) |
| 2010-01-02 | $18.13M | $430.15M | $5.50M | $13.70M | $2.38M | 4.22% | 1.28% | 5.76× | Reported |
(m) means missing inputs. Historical market-based ratios use the saved close on or immediately before period ending and that period’s reported shares; current quotes are not substituted. Five-year projections repeat historical CAGR, not analyst forecasts.
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