Lantheus Holdings, Inc. SEC filings LNTH
Lantheus Holdings, Inc. has 1,003 filings in SEC EDGAR's recent list, going back to Aug 5, 2016. Its latest annual report, Form ARS, was filed on Mar 20, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2026 | — |
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2026 | Nov 5, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 30, 2026 | — |
| 8-K |
Current report
Other events
|
Oct 22, 2026 | Oct 21, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Oct 14, 2026 | Oct 14, 2026 |
| DEFA14A | Additional proxy material | Oct 2, 2026 | — |
| 8-K |
Current report
Other events
|
Oct 2, 2026 | Oct 2, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Sep 23, 2026 | — |
| DEFA14A | Additional proxy material | Sep 21, 2026 | — |
| 8-K |
Current report
Other events
|
Sep 21, 2026 | Sep 17, 2026 |
| DEFA14A | Additional proxy material | Sep 17, 2026 | — |
| 4 | Insider transaction | Sep 8, 2026 | Sep 3, 2026 |
| DEFM14A | Filing | Sep 8, 2026 | — |
| 4 | Insider transaction | Sep 4, 2026 | Sep 2, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Sep 4, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Sep 4, 2026 | — |
| SCHEDULE 13D | Ownership over 5% (active) | Sep 4, 2026 | — |
| 4 | Insider transaction | Sep 3, 2026 | Sep 1, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| 4 | Insider transaction | Sep 2, 2026 | Aug 31, 2026 |
| S-8 | Employee stock plan registration | Sep 2, 2026 | — |
| PREM14A | Filing | Aug 26, 2026 | Aug 26, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 17, 2026 |
| 4 | Insider transaction | Aug 19, 2026 | Aug 17, 2026 |
| DEFA14A | Additional proxy material | Aug 13, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2026 | — |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 6, 2026 | Aug 6, 2026 |
| DEFA14A | Additional proxy material | Aug 4, 2026 | — |
| DEFA14A | Additional proxy material | Aug 4, 2026 | — |
| 8-K |
Current report
Material agreement, Officer or director change
|
Aug 4, 2026 | Aug 1, 2026 |
| DEFA14A | Additional proxy material | Aug 3, 2026 | — |
| DEFA14A | Additional proxy material | Aug 3, 2026 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Aug 3, 2026 | Aug 3, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jun 3, 2026 | May 14, 2026 |
| 4 | Insider transaction | Jun 3, 2026 | May 14, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| 8-K |
Current report
Change to shareholder rights, Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
May 1, 2026 | Apr 30, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| 4 | Insider transaction | Apr 21, 2026 | Apr 17, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| ARS | Annual report to shareholders | Mar 20, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Mar 20, 2026 | — |
| DEF 14A | Proxy statement | Mar 20, 2026 | Apr 30, 2026 |
| PRE 14A | Preliminary proxy statement | Mar 10, 2026 | Apr 30, 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 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 10-K | Annual report | Feb 26, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2026 | Feb 26, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2026 | — |
| 144 | Notice of proposed sale | Feb 2, 2026 | — |
| 144 | Notice of proposed sale | Jan 6, 2026 | — |
| 4 | Insider transaction | Dec 17, 2025 | Dec 15, 2024 |
| 144 | Notice of proposed sale | Dec 12, 2025 | — |
| 144 | Notice of proposed sale | Nov 26, 2025 | — |
| 4 | Insider transaction | Nov 19, 2025 | Nov 17, 2025 |
| 144 | Notice of proposed sale | Nov 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Nov 12, 2025 | Nov 6, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 12, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 7, 2025 | — |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations, Officer or director change, Regulation FD disclosure
|
Nov 6, 2025 | Oct 31, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2025 | — |
| 4 | Insider transaction | Sep 3, 2025 | Aug 29, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 4 | Insider transaction | Aug 21, 2025 | Aug 19, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Aug 15, 2025 |
| 3 | Initial insider ownership | Aug 18, 2025 | Aug 1, 2025 |
| 3 | Initial insider ownership | Aug 18, 2025 | Aug 6, 2025 |
| 3 | Initial insider ownership | Aug 18, 2025 | Aug 6, 2025 |
| 4 | Insider transaction | Aug 15, 2025 | Aug 13, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 144 | Notice of proposed sale | Aug 13, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Aug 11, 2025 | Aug 7, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 6, 2025 | — |
| 10-Q | Quarterly report | Aug 6, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Aug 6, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Acquisition or sale of assets, Regulation FD disclosure
|
Jul 22, 2025 | Jul 21, 2025 |
| 4 | Insider transaction | Jul 17, 2025 | Jul 15, 2025 |
| 4 | Insider transaction | Jun 17, 2025 | Jun 13, 2025 |
| 144 | Notice of proposed sale | Jun 13, 2025 | — |
| 4 | Insider transaction | Jun 11, 2025 | Jun 9, 2025 |
| 4 | Insider transaction | Jun 11, 2025 | Jun 9, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 4 | Insider transaction | Jun 9, 2025 | Jun 5, 2025 |
| 144 | Notice of proposed sale | Jun 9, 2025 | — |
| 144 | Notice of proposed sale | Jun 9, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 6, 2025 | — |
| 144 | Notice of proposed sale | Jun 5, 2025 | — |
| 144 | Notice of proposed sale | Jun 5, 2025 | — |
| 144 | Notice of proposed sale | Jun 5, 2025 | — |
| 4 | Insider transaction | Jun 4, 2025 | Jun 2, 2025 |
| SD | Specialized disclosure (conflict minerals) | May 30, 2025 | — |
| 4 | Insider transaction | May 29, 2025 | May 27, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 14, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 14, 2025 | — |
| 4 | Insider transaction | May 13, 2025 | May 9, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 8, 2025 | — |
| 10-Q | Quarterly report | May 7, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
May 5, 2025 | May 1, 2025 |
| 4 | Insider transaction | Apr 21, 2025 | Apr 17, 2025 |
| 4 | Insider transaction | Apr 21, 2025 | Apr 17, 2025 |
| 8-K |
Current report
Acquisition or sale of assets, Regulation FD disclosure
|
Apr 1, 2025 | Apr 1, 2025 |
| 4 | Insider transaction | Mar 21, 2025 | Mar 5, 2025 |
| ARS | Annual report to shareholders | Mar 21, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Mar 21, 2025 | — |
| DEF 14A | Proxy statement | Mar 21, 2025 | May 1, 2025 |
| 4 | Insider transaction | Mar 19, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 17, 2025 | Jun 7, 2024 |
| 144 | Notice of proposed sale | Mar 17, 2025 | — |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 3, 2025 |
| 144 | Notice of proposed sale | Mar 5, 2025 | — |
| 144 | Notice of proposed sale | Feb 28, 2025 | — |
| 10-K | Annual report | Feb 26, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2025 | Feb 26, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 4/A | Amended statement of changes in beneficial ownership of securities | Feb 12, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 3 | Initial insider ownership | Feb 7, 2025 | Feb 1, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Jan 30, 2025 | Jan 29, 2025 |
| 8-K |
Current report
Material agreement, Results of operations, Regulation FD disclosure
|
Jan 28, 2025 | Jan 27, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 144 | Notice of proposed sale | Jan 15, 2025 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jan 13, 2025 | Jan 12, 2025 |
| 4 | Insider transaction | Dec 23, 2024 | Dec 19, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 23, 2024 | Dec 19, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 19, 2024 | Dec 19, 2024 |
| 8-K |
Current report
Other events
|
Nov 20, 2024 | Nov 20, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 18, 2024 | Nov 14, 2024 |
| 144 | Notice of proposed sale | Nov 15, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 144 | Notice of proposed sale | Nov 14, 2024 | — |
| 4 | Insider transaction | Nov 12, 2024 | Nov 8, 2024 |
| 144 | Notice of proposed sale | Nov 8, 2024 | — |
| 10-Q | Quarterly report | Nov 6, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 6, 2024 | Nov 6, 2024 |
| 144 | Notice of proposed sale | Oct 15, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 25, 2024 | Sep 25, 2024 |
| 144 | Notice of proposed sale | Sep 13, 2024 | — |
| 4 | Insider transaction | Sep 12, 2024 | Sep 10, 2024 |
| 3 | Initial insider ownership | Sep 9, 2024 | Sep 3, 2024 |
| 8-K |
Current report
Officer or director change
|
Sep 5, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 3, 2024 | Aug 29, 2024 |
| 4 | Insider transaction | Aug 23, 2024 | Aug 21, 2024 |
| S-8 | Employee stock plan registration | Aug 21, 2024 | — |
| 144 | Notice of proposed sale | Aug 21, 2024 | — |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 14, 2024 |
| 4 | Insider transaction | Aug 14, 2024 | Aug 12, 2024 |
| 144 | Notice of proposed sale | Aug 14, 2024 | — |
| 144 | Notice of proposed sale | Aug 13, 2024 | — |
| 4 | Insider transaction | Aug 12, 2024 | Aug 8, 2024 |
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Company profile
- Industry
- In Vitro & In Vivo Diagnostic Substances (SIC 2835)
- Listed as
- LNTH (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Bedford, MA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1521036
- Former names
- Lantheus MI Holdings, Inc. (until May 23, 2014)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.