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 |
|---|---|---|---|
| 4 | Insider transaction | Oct 30, 2026 | Oct 29, 2026 |
| 4 | Insider transaction | Oct 30, 2026 | Oct 29, 2026 |
| 144 | Notice of proposed sale | Oct 29, 2026 | — |
| 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 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| 4 | Insider transaction | Aug 17, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | Aug 12, 2026 | Aug 11, 2026 |
| 4 | Insider transaction | Aug 11, 2026 | Aug 6, 2026 |
| 3 | Initial insider ownership | Aug 11, 2026 | Aug 6, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 11, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Jul 31, 2026 | Jul 30, 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 |
| 144 | Notice of proposed sale | Jul 17, 2026 | — |
| 4 | Insider transaction | Jun 22, 2026 | Jun 18, 2026 |
| 144 | Notice of proposed sale | Jun 18, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 18, 2026 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 4 | Insider transaction | Jun 11, 2026 | Jun 11, 2026 |
| 144 | Notice of proposed sale | Jun 11, 2026 | — |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 4, 2026 |
| 4 | Insider transaction | Jun 4, 2026 | Jun 3, 2026 |
| 144 | Notice of proposed sale | Jun 3, 2026 | — |
| 4 | Insider transaction | Jun 3, 2026 | Jun 2, 2026 |
| 144 | Notice of proposed sale | Jun 2, 2026 | — |
| SD | Specialized disclosure (conflict minerals) | May 28, 2026 | — |
| 4 | Insider transaction | May 21, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 1, 2026 |
| 3 | Initial insider ownership | May 21, 2026 | May 1, 2026 |
| 144 | Notice of proposed sale | May 20, 2026 | — |
| 4 | Insider transaction | May 20, 2026 | Apr 27, 2023 |
| 4 | Insider transaction | May 20, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 14, 2026 | May 14, 2026 |
| 144 | Notice of proposed sale | May 13, 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 |
| 4 | Insider transaction | May 1, 2026 | Apr 30, 2026 |
| 4 | Insider transaction | Apr 30, 2026 | Apr 28, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 4 | Insider transaction | Apr 28, 2026 | Apr 24, 2026 |
| 144 | Notice of proposed sale | Apr 28, 2026 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Apr 28, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| 4 | Insider transaction | Apr 24, 2026 | Apr 22, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Mar 16, 2026 | Mar 13, 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 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 4, 2026 |
| 3 | Initial insider ownership | Mar 5, 2026 | Mar 4, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 5, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Feb 25, 2026 | Feb 24, 2026 |
| 144 | Notice of proposed sale | Feb 24, 2026 | — |
| 4 | Insider transaction | Feb 20, 2026 | Feb 20, 2026 |
| 144 | Notice of proposed sale | Feb 20, 2026 | — |
| 10-K | Annual report | Feb 19, 2026 | Dec 27, 2025 |
| 4 | Insider transaction | Feb 11, 2026 | Feb 10, 2026 |
| 144 | Notice of proposed sale | Feb 10, 2026 | — |
| 4 | Insider transaction | Feb 6, 2026 | Feb 5, 2026 |
| 4 | Insider transaction | Feb 6, 2026 | Feb 4, 2026 |
| 4 | Insider transaction | Feb 5, 2026 | Feb 4, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 144 | Notice of proposed sale | Feb 4, 2026 | — |
| 144 | Notice of proposed sale | Feb 2, 2026 | — |
| 144 | Notice of proposed sale | Feb 2, 2026 | — |
| 144 | Notice of proposed sale | Feb 2, 2026 | — |
| 144 | Notice of proposed sale | Feb 2, 2026 | — |
| 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 |
| 4 | Insider transaction | Dec 15, 2025 | Dec 11, 2025 |
| 4 | Insider transaction | Dec 15, 2025 | Dec 11, 2025 |
| 144 | Notice of proposed sale | Dec 11, 2025 | — |
| 144 | Notice of proposed sale | Dec 11, 2025 | — |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 4, 2025 |
| 4 | Insider transaction | Dec 8, 2025 | Dec 5, 2025 |
| 144 | Notice of proposed sale | Dec 5, 2025 | — |
| 144 | Notice of proposed sale | Dec 4, 2025 | — |
| 4 | Insider transaction | Nov 28, 2025 | Nov 26, 2025 |
| 144 | Notice of proposed sale | Nov 26, 2025 | — |
| 4 | Insider transaction | Oct 31, 2025 | Oct 30, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 31, 2025 | — |
| 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 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Sep 8, 2025 | Sep 5, 2025 |
| 4 | Insider transaction | Aug 26, 2025 | Aug 25, 2025 |
| 4 | Insider transaction | Aug 26, 2025 | Aug 25, 2025 |
| 144 | Notice of proposed sale | Aug 25, 2025 | — |
| 144 | Notice of proposed sale | Aug 25, 2025 | — |
| 144 | Notice of proposed sale | Aug 22, 2025 | — |
| 144 | Notice of proposed sale | Aug 22, 2025 | — |
| 144 | Notice of proposed sale | Aug 19, 2025 | — |
| 4 | Insider transaction | Aug 15, 2025 | Aug 13, 2025 |
| 4 | Insider transaction | Aug 15, 2025 | Aug 14, 2025 |
Showing 200 filings, the most recent 200. 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.