# Littelfuse Inc: overview

LFUS · Nasdaq · CIK 889331 · [Technology](/sectors/technology.md) · fiscal year ends Dec 26

Pages: [Overview](/companies/lfus.md) · [Financials](/companies/lfus/financials.md) · [Filings](/companies/lfus/filings.md) · [Insiders](/companies/lfus/insiders.md)

Latest reported revenue: [$766.7m](/filings/0001628280-26-067807.md) for Q3 FY2026, three months to 2026-09-26, from the 10-Q filed Oct 28, 2026 (XBRL us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax, accession 0001628280-26-067807).

## Last eight quarters

| Line item | Unit | Q4 FY2024 (2024-12-28) | Q1 FY2025 (2025-03-29) | Q2 FY2025 (2025-06-28) | Q3 FY2025 (2025-09-27) | Q4 FY2025 (2025-12-27) | Q1 FY2026 (2026-03-28) | Q2 FY2026 (2026-06-27) | Q3 FY2026 (2026-09-26) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [530 d](/filings/0001628280-26-009585.md) | [554](/filings/0001628280-26-031041.md) | [613](/filings/0001628280-26-050481.md) | [625](/filings/0001628280-26-067807.md) | [594 d](/filings/0001628280-26-009585.md) | [657](/filings/0001628280-26-031041.md) | [739](/filings/0001628280-26-050481.md) | [767](/filings/0001628280-26-067807.md) |
| Gross margin | % | [33.4% d](/filings/0001628280-26-009585.md) | [37.4%](/filings/0001628280-26-031041.md) | [37.8%](/filings/0001628280-26-050481.md) | [38.6%](/filings/0001628280-26-067807.md) | [38.0% d](/filings/0001628280-26-009585.md) | [38.7%](/filings/0001628280-26-031041.md) | [41.4%](/filings/0001628280-26-050481.md) | [41.5%](/filings/0001628280-26-067807.md) |
| Operating margin | % | [(9.3%) d](/filings/0001628280-26-009585.md) | [12.7%](/filings/0001628280-26-031041.md) | [15.1%](/filings/0001628280-26-050481.md) | [15.6%](/filings/0001628280-26-067807.md) | [(37.5%) d](/filings/0001628280-26-009585.md) | [15.4%](/filings/0001628280-26-031041.md) | [16.2%](/filings/0001628280-26-050481.md) | [20.0%](/filings/0001628280-26-067807.md) |
| Net margin | % | [(9.8%) d](/filings/0001628280-26-009585.md) | [7.9%](/filings/0001628280-26-067807.md) | [9.3%](/filings/0001628280-26-067807.md) | [11.1%](/filings/0001628280-26-067807.md) | [(40.8%) d](/filings/0001628280-26-009585.md) | [11.4%](/filings/0001628280-26-067807.md) | [12.1%](/filings/0001628280-26-067807.md) | [15.0%](/filings/0001628280-26-067807.md) |
| Diluted EPS | $ per share | not reported | [1.75](/filings/0001628280-26-031041.md) | [2.30](/filings/0001628280-26-050481.md) | [2.77](/filings/0001628280-26-067807.md) | not reported | [2.96](/filings/0001628280-26-031041.md) | [3.49](/filings/0001628280-26-050481.md) | [4.49](/filings/0001628280-26-067807.md) |
| Free cash flow | $m | [135 d](/filings/0001628280-26-009585.md) | [42.7](/filings/0001628280-26-031041.md) | [72.6 d](/filings/0001628280-26-050481.md) | [131 d](/filings/0001628280-26-067807.md) | [120 d](/filings/0001628280-26-009585.md) | [66.2](/filings/0001628280-26-031041.md) | [127 d](/filings/0001628280-26-050481.md) | [216 d](/filings/0001628280-26-067807.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 12-month figure less the 9-month figure; 6-month figure less the 3-month figure; 9-month figure less the 6-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2022-01-01) | FY2022 (2022-12-31) | FY2023 (2023-12-30) | FY2024 (2024-12-28) | FY2025 (2025-12-27) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [2,080](/filings/0000889331-24-000034.md) | [2,514](/filings/0000889331-25-000039.md) | [2,363](/filings/0001628280-26-009585.md) | [2,191](/filings/0001628280-26-009585.md) | [2,386](/filings/0001628280-26-009585.md) |
| Gross margin | % | [37.1%](/filings/0000889331-24-000034.md) | [40.1%](/filings/0000889331-25-000039.md) | [38.1%](/filings/0001628280-26-009585.md) | [35.9%](/filings/0001628280-26-009585.md) | [38.0%](/filings/0001628280-26-009585.md) |
| Operating margin | % | [18.5%](/filings/0000889331-24-000034.md) | [19.9%](/filings/0000889331-25-000039.md) | [15.3%](/filings/0001628280-26-009585.md) | [7.2%](/filings/0001628280-26-009585.md) | [1.6%](/filings/0001628280-26-009585.md) |
| Net margin | % | [13.6%](/filings/0000889331-24-000034.md) | [14.8%](/filings/0000889331-25-000039.md) | [11.0%](/filings/0001628280-26-009585.md) | [4.6%](/filings/0001628280-26-009585.md) | [(3.0%)](/filings/0001628280-26-009585.md) |
| Diluted EPS | $ per share | [11.38](/filings/0000889331-24-000034.md) | [14.94](/filings/0000889331-25-000039.md) | [10.34](/filings/0001628280-26-009585.md) | [4.00](/filings/0001628280-26-009585.md) | [(2.89)](/filings/0001628280-26-009585.md) |
| Free cash flow | $m | [283](/filings/0000889331-24-000034.md) | [315](/filings/0000889331-25-000039.md) | [371](/filings/0001628280-26-009585.md) | [292](/filings/0001628280-26-009585.md) | [366](/filings/0001628280-26-009585.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax.
- Gross margin (gross profit / revenue). XBRL Gross profit: us-gaap:GrossProfit; Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/lfus/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $1.15bn | 2,523,051 |  | Added +174,016 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $684.9m | 1,504,081 |  | Reduced −62,996 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $519.6m | 1,141,062 |  | Added +14,792 |
| [VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.](/funds/1367401.md) | 2026-06-30 | $425.1m | 933,511 |  | Reduced −49,203 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $361.6m | 794,167 |  | Added +23,267 |
| [MAIRS & POWER INC](/funds/1070134.md) | 2026-06-30 | $274.2m | 602,104 |  | Reduced −122,606 |
| [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $265.6m | 583,297 |  | Added +92,925 |
| [MORGAN STANLEY](/funds/895421.md) | 2026-06-30 | $214.6m | 471,250 |  | Added +44,218 |
| [NEUBERGER BERMAN GROUP LLC](/funds/1465109.md) | 2026-06-30 | $213.0m | 467,862 |  | Reduced −273,321 |
| [DIMENSIONAL FUND ADVISORS LP](/funds/354204.md) | 2026-06-30 | $202.7m | 445,099 |  | Reduced −57,710 |

## Recent filings

[All 2,102 filings](/companies/lfus/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-28 | 12:33 ET | [10-Q](/filings/0001628280-26-067807.md) | Quarterly report, period 2026-09-26 | 0001628280-26-067807 |
| 2026-10-28 | 07:06 ET | [8-K](/filings/0001628280-26-067718.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001628280-26-067718 |
| 2026-09-17 | 08:13 ET | [8-K](/filings/0000889331-26-000014.md) | 7.01 Regulation FD disclosure | 0000889331-26-000014 |
| 2026-09-16 | 09:02 ET | [8-K](/filings/0000889331-26-000012.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0000889331-26-000012 |
| 2026-08-11 | 07:34 ET | [8-K](/filings/0000889331-26-000010.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0000889331-26-000010 |
| 2026-07-29 | 13:08 ET | [10-Q](/filings/0001628280-26-050481.md) | Quarterly report, period 2026-06-27 | 0001628280-26-050481 |
| 2026-07-29 | 07:02 ET | [8-K](/filings/0001628280-26-050382.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001628280-26-050382 |
| 2026-05-14 | 07:56 ET | [8-K](/filings/0001140361-26-021160.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001140361-26-021160 |
| 2026-05-06 | 12:14 ET | [10-Q](/filings/0001628280-26-031041.md) | Quarterly report, period 2026-03-28 | 0001628280-26-031041 |
| 2026-05-06 | 07:02 ET | [8-K](/filings/0001628280-26-030892.md) | 2.02 Results of operations; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001628280-26-030892 |

## Latest annual report

[Form 10-K for the fiscal year ended Dec 27, 2025](/filings/0001628280-26-009585.md), filed Feb 19, 2026.

## Forecast league

Not in this season’s league. [This season’s league](/leagues.md)

## About the filer

- CIK: 889331
- Tickers: LFUS
- Exchange: Nasdaq
- SIC code: 3613 Switchgear & Switchboard Apparatus
- State of incorporation: DE
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 30, 2026, 16:31 ET. No prices; not investment advice.