Littelfuse Inc /DE SEC filings LFUS
Littelfuse Inc /DE has 1,001 filings in SEC EDGAR's recent list, going back to May 1, 2018. Its latest annual report, Form ARS, was filed on Mar 12, 2026 for the period ended Dec 27, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 28, 2026, covering the quarter ended Sep 26, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 26.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Oct 28, 2026 | Sep 26, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 28, 2026 | Oct 28, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 17, 2026 | Sep 15, 2026 |
| 8-K |
Current report
Officer or director change
|
Sep 16, 2026 | Sep 10, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 11, 2026 | Aug 6, 2026 |
| 10-Q | Quarterly report | Jul 29, 2026 | Jun 27, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 29, 2026 | Jul 29, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 28, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 14, 2026 | May 14, 2026 |
| 10-Q | Quarterly report | May 6, 2026 | Mar 28, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 6, 2026 | May 6, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 28, 2026 | Apr 22, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Mar 13, 2026 | Mar 12, 2026 |
| ARS | Annual report to shareholders | Mar 12, 2026 | Dec 27, 2025 |
| DEFA14A | Additional proxy material | Mar 12, 2026 | — |
| DEF 14A | Proxy statement | Mar 12, 2026 | Apr 22, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 5, 2026 | Mar 4, 2026 |
| 10-K | Annual report | Feb 19, 2026 | Dec 27, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 28, 2026 | Jan 28, 2026 |
| 8-K |
Current report
Officer or director change
|
Jan 8, 2026 | Jan 7, 2026 |
| 10-Q | Quarterly report | Oct 29, 2025 | Sep 27, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 29, 2025 | Oct 29, 2025 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Oct 28, 2025 | Oct 24, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 7, 2025 | Aug 7, 2025 |
| 10-Q | Quarterly report | Jul 30, 2025 | Jun 28, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 30, 2025 | Jul 30, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 28, 2025 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
May 27, 2025 | May 27, 2025 |
| 10-Q | Quarterly report | Apr 30, 2025 | Mar 29, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 29, 2025 | Apr 29, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 28, 2025 | Apr 24, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Apr 9, 2025 | Apr 8, 2025 |
| ARS | Annual report to shareholders | Mar 14, 2025 | Dec 28, 2024 |
| DEFA14A | Additional proxy material | Mar 14, 2025 | — |
| DEF 14A | Proxy statement | Mar 14, 2025 | Apr 24, 2025 |
| 10-K | Annual report | Mar 13, 2025 | Dec 28, 2024 |
| NT 10-K | Filing | Feb 27, 2025 | Dec 28, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 28, 2025 | Jan 28, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 13, 2025 | Jan 10, 2025 |
| 10-Q | Quarterly report | Oct 30, 2024 | Sep 28, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 29, 2024 | Oct 29, 2024 |
| 10-Q | Quarterly report | Jul 31, 2024 | Jun 29, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 30, 2024 | Jul 30, 2024 |
| SD | Specialized disclosure (conflict minerals) | May 24, 2024 | — |
| 10-Q | Quarterly report | May 1, 2024 | Mar 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 30, 2024 | Apr 30, 2024 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 26, 2024 | Apr 25, 2024 |
| ARS | Annual report to shareholders | Mar 14, 2024 | Dec 30, 2023 |
| DEFA14A | Additional proxy material | Mar 14, 2024 | — |
| DEF 14A | Proxy statement | Mar 14, 2024 | Apr 25, 2024 |
| 10-K | Annual report | Feb 16, 2024 | Dec 30, 2023 |
| 8-K |
Current report
Officer or director change
|
Feb 1, 2024 | Jan 26, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 30, 2024 | Jan 30, 2024 |
| 8-K |
Current report
Officer or director change
|
Jan 5, 2024 | Jan 1, 2024 |
| UPLOAD | Letter from the SEC | Nov 9, 2023 | — |
| CORRESP | Letter to the SEC | Nov 6, 2023 | — |
| 10-Q | Quarterly report | Nov 1, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 31, 2023 | Oct 31, 2023 |
| UPLOAD | Letter from the SEC | Oct 30, 2023 | — |
| 8-K |
Current report
Officer or director change, Other events
|
Sep 28, 2023 | Sep 28, 2023 |
| 8-K |
Current report
Auditor change
|
Aug 16, 2023 | Aug 15, 2023 |
| 10-Q | Quarterly report | Aug 2, 2023 | Jul 1, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 1, 2023 | Aug 1, 2023 |
| S-8 | Employee stock plan registration | Jun 20, 2023 | — |
| SD | Specialized disclosure (conflict minerals) | May 25, 2023 | — |
| 8-K |
Current report
Officer or director change, Other events
|
May 15, 2023 | May 15, 2023 |
| 10-Q | Quarterly report | May 3, 2023 | Apr 1, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 2, 2023 | May 2, 2023 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
Apr 28, 2023 | Apr 27, 2023 |
| ARS | Annual report to shareholders | Mar 16, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Mar 16, 2023 | — |
| DEF 14A | Proxy statement | Mar 16, 2023 | — |
| 10-K | Annual report | Feb 16, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Feb 2, 2023 | Jan 27, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 1, 2023 | Feb 1, 2023 |
| 10-Q | Quarterly report | Nov 2, 2022 | Oct 1, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 1, 2022 | Nov 1, 2022 |
| 10-Q | Quarterly report | Aug 3, 2022 | Jul 2, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 2, 2022 | Aug 2, 2022 |
| 8-K |
Current report
New debt, Regulation FD disclosure
|
Jul 19, 2022 | Jul 18, 2022 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 30, 2022 | Jun 30, 2022 |
| SD | Specialized disclosure (conflict minerals) | May 27, 2022 | — |
| 8-K |
Current report
Material agreement, New debt
|
May 19, 2022 | May 18, 2022 |
| 10-Q | Quarterly report | May 4, 2022 | Apr 2, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 3, 2022 | May 3, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Apr 29, 2022 | Apr 28, 2022 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Apr 8, 2022 | Apr 7, 2022 |
| DEFA14A | Additional proxy material | Mar 16, 2022 | — |
| DEF 14A | Proxy statement | Mar 16, 2022 | Apr 28, 2022 |
| 10-K | Annual report | Feb 17, 2022 | Jan 1, 2022 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 1, 2022 | Feb 1, 2022 |
| 8-K |
Current report
Acquisition or sale of assets, Regulation FD disclosure
|
Nov 30, 2021 | Nov 30, 2021 |
| 10-Q | Quarterly report | Oct 27, 2021 | Sep 25, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 26, 2021 | Oct 26, 2021 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Oct 20, 2021 | Oct 19, 2021 |
| 10-Q | Quarterly report | Jul 28, 2021 | Jun 26, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 28, 2021 | Jul 28, 2021 |
| SD | Specialized disclosure (conflict minerals) | May 27, 2021 | — |
| 10-Q | Quarterly report | Apr 28, 2021 | Mar 27, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 28, 2021 | Apr 28, 2021 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 23, 2021 | Apr 22, 2021 |
| DEFA14A | Additional proxy material | Mar 12, 2021 | — |
| DEF 14A | Proxy statement | Mar 12, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 23, 2021 | Feb 23, 2021 |
| 10-K | Annual report | Feb 18, 2021 | Dec 26, 2020 |
| 8-K |
Current report
Results of operations
|
Feb 3, 2021 | Feb 3, 2021 |
| 8-K |
Current report
Officer or director change
|
Jan 27, 2021 | Jan 21, 2021 |
| UPLOAD | Letter from the SEC | Dec 4, 2020 | — |
| CORRESP | Letter to the SEC | Dec 2, 2020 | — |
| UPLOAD | Letter from the SEC | Nov 20, 2020 | — |
| 10-Q | Quarterly report | Oct 28, 2020 | Sep 26, 2020 |
| 8-K |
Current report
Results of operations
|
Oct 28, 2020 | Oct 28, 2020 |
| 10-Q | Quarterly report | Jul 29, 2020 | Jun 27, 2020 |
| 8-K |
Current report
Results of operations
|
Jul 29, 2020 | Jul 29, 2020 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2020 | — |
| 10-Q | Quarterly report | Apr 29, 2020 | Mar 28, 2020 |
| 8-K |
Current report
Results of operations
|
Apr 29, 2020 | Apr 29, 2020 |
| 8-K/A |
Amended current report
Officer or director change
|
Apr 24, 2020 | Jan 24, 2020 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 24, 2020 | Apr 22, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Apr 7, 2020 | Apr 3, 2020 |
| DEFA14A | Additional proxy material | Mar 13, 2020 | — |
| DEF 14A | Proxy statement | Mar 13, 2020 | Apr 23, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 26, 2020 | Feb 26, 2020 |
| 10-K | Annual report | Feb 21, 2020 | Dec 28, 2019 |
| 8-K |
Current report
Results of operations
|
Jan 29, 2020 | Jan 29, 2020 |
| 8-K |
Current report
Officer or director change, Other events
|
Jan 27, 2020 | Jan 24, 2020 |
| 10-Q | Quarterly report | Oct 30, 2019 | Sep 28, 2019 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2019 | Oct 30, 2019 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 28, 2019 | Aug 28, 2019 |
| 10-Q | Quarterly report | Jul 31, 2019 | Jun 29, 2019 |
| 8-K |
Current report
Results of operations
|
Jul 31, 2019 | Jul 31, 2019 |
| 8-K |
Current report
Results of operations
|
Jul 17, 2019 | Jul 16, 2019 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2019 | — |
| 10-Q | Quarterly report | May 1, 2019 | Mar 30, 2019 |
| 8-K |
Current report
Results of operations
|
May 1, 2019 | May 1, 2019 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 29, 2019 | Apr 26, 2019 |
| DEFA14A | Additional proxy material | Mar 15, 2019 | — |
| DEF 14A | Proxy statement | Mar 15, 2019 | Apr 26, 2019 |
| 10-K | Annual report | Feb 22, 2019 | Dec 29, 2018 |
| 8-K |
Current report
Results of operations
|
Jan 30, 2019 | Jan 30, 2019 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jan 25, 2019 | Jan 24, 2019 |
| 8-K |
Current report
Officer or director change, Other events
|
Dec 10, 2018 | Dec 10, 2018 |
| 10-Q | Quarterly report | Oct 31, 2018 | Sep 29, 2018 |
| 8-K |
Current report
Results of operations
|
Oct 31, 2018 | Oct 31, 2018 |
| UPLOAD | Letter from the SEC | Aug 20, 2018 | — |
| CORRESP | Letter to the SEC | Aug 15, 2018 | — |
| S-8 | Employee stock plan registration | Aug 9, 2018 | — |
| UPLOAD | Letter from the SEC | Aug 7, 2018 | — |
| 10-Q | Quarterly report | Aug 1, 2018 | Jun 30, 2018 |
| 8-K |
Current report
Results of operations, Other events
|
Aug 1, 2018 | Aug 1, 2018 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2018 | — |
| 8-K |
Current report
Other events
|
May 3, 2018 | May 3, 2018 |
| 10-Q | Quarterly report | May 2, 2018 | Mar 31, 2018 |
| 8-K |
Current report
Results of operations
|
May 2, 2018 | May 2, 2018 |
Showing 154 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Switchgear & Switchboard Apparatus (SIC 3613)
- Listed as
- LFUS (Nasdaq)
- Fiscal year ends
- December 26
- Incorporated in
- DE
- Headquarters
- Rosemont, IL
- SEC filer status
- Large accelerated filer
- SEC CIK
- 889331
Other Switchgear & Switchboard Apparatus companies
- Powell Industries Inc POWL
- Abb Ltd ABBNY
Source: SEC EDGAR filings. This is company-reported data, not investment advice.