Larimar Therapeutics, Inc. SEC filings LRMR
Larimar Therapeutics, Inc. has 696 filings in SEC EDGAR's recent list, going back to Aug 28, 2006. Its latest annual report, Form ARS, was filed on Apr 20, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 4, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 29, 2026 (officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Oct 1, 2026 | Sep 29, 2026 |
| 3 | Initial insider ownership | Oct 1, 2026 | Sep 29, 2026 |
| 4 | Insider transaction | Jul 8, 2026 | Jul 6, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 20, 2026 | May 19, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 14, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Mar 2, 2026 | — |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Feb 27, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2026 | — |
| 4 | Insider transaction | Jan 27, 2026 | Jan 26, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 26, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 26, 2026 |
| 4 | Insider transaction | Jan 27, 2026 | Jan 26, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 6, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 29, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 31, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 17, 2025 | — |
| 4 | Insider transaction | May 15, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| 4 | Insider transaction | May 14, 2025 | May 13, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 13, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 22, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 16, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 4, 2025 | — |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| 4 | Insider transaction | Jan 24, 2025 | Jan 22, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 8, 2025 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 6, 2024 | — |
| 4 | Insider transaction | Jun 3, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | May 29, 2024 |
| 4 | Insider transaction | May 31, 2024 | Feb 16, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 15, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 26, 2024 | — |
| 4 | Insider transaction | Feb 16, 2024 | Feb 16, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Feb 16, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 15, 2024 | — |
| 4 | Insider transaction | Feb 15, 2024 | Feb 14, 2024 |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| 4 | Insider transaction | Jan 19, 2024 | Jan 17, 2024 |
| 4 | Insider transaction | Jan 19, 2024 | Jan 17, 2024 |
| 4 | Insider transaction | Jan 19, 2024 | Jan 17, 2024 |
| 4 | Insider transaction | Jan 19, 2024 | Jan 17, 2024 |
| 4 | Insider transaction | Dec 8, 2023 | Dec 7, 2023 |
| 4 | Insider transaction | Oct 5, 2023 | Oct 3, 2023 |
| 3 | Initial insider ownership | Oct 5, 2023 | Oct 3, 2023 |
| SC 13G | Ownership over 5% (passive) | Aug 18, 2023 | — |
| 144 | Notice of proposed sale | Jul 24, 2023 | — |
| 4 | Insider transaction | Jul 18, 2023 | Jul 17, 2023 |
| 3 | Initial insider ownership | Jul 18, 2023 | Jul 17, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 18, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 11, 2023 | May 9, 2023 |
| 4 | Insider transaction | May 11, 2023 | May 9, 2023 |
| 4 | Insider transaction | May 11, 2023 | May 9, 2023 |
| 4 | Insider transaction | May 11, 2023 | May 9, 2023 |
| 4 | Insider transaction | May 11, 2023 | May 9, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Mar 17, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2023 | — |
| 4 | Insider transaction | Feb 9, 2023 | Feb 7, 2023 |
| 3 | Initial insider ownership | Feb 9, 2023 | Feb 7, 2023 |
| 4 | Insider transaction | Feb 2, 2023 | Jan 31, 2023 |
| 4 | Insider transaction | Feb 2, 2023 | Jan 31, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2022 | — |
| 4 | Insider transaction | Sep 20, 2022 | Sep 16, 2022 |
| 3 | Initial insider ownership | Sep 20, 2022 | Sep 16, 2022 |
| 4 | Insider transaction | Sep 20, 2022 | Sep 16, 2022 |
| 4 | Insider transaction | Sep 19, 2022 | Sep 16, 2022 |
| 4 | Insider transaction | Sep 19, 2022 | Sep 16, 2022 |
| SC 13D/A | Amended ownership over 5% (active) | Sep 16, 2022 | — |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 12, 2022 | May 10, 2022 |
| 4 | Insider transaction | May 11, 2022 | May 10, 2022 |
| SC 13G | Ownership over 5% (passive) | Feb 18, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 15, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2022 | — |
| 4 | Insider transaction | Jan 20, 2022 | Jan 18, 2022 |
| 4 | Insider transaction | Jan 20, 2022 | Jan 18, 2022 |
| SC 13D/A | Amended ownership over 5% (active) | Jul 2, 2021 | — |
| 4 | Insider transaction | Jul 2, 2021 | Jun 30, 2021 |
| 4 | Insider transaction | Jul 2, 2021 | Jun 30, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | May 26, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | May 21, 2021 | — |
| 4 | Insider transaction | May 20, 2021 | May 12, 2021 |
| 4 | Insider transaction | May 17, 2021 | May 12, 2021 |
| 4 | Insider transaction | May 17, 2021 | May 12, 2021 |
| 4 | Insider transaction | May 17, 2021 | May 12, 2021 |
| 4 | Insider transaction | May 17, 2021 | May 12, 2021 |
| 4 | Insider transaction | May 17, 2021 | May 12, 2021 |
| 4 | Insider transaction | May 17, 2021 | May 12, 2021 |
| SC 13G | Ownership over 5% (passive) | Mar 2, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 12, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 2, 2021 | — |
| 4 | Insider transaction | Jan 21, 2021 | Jan 19, 2021 |
| 4 | Insider transaction | Jan 21, 2021 | Jan 19, 2021 |
| 4 | Insider transaction | Oct 1, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| 4 | Insider transaction | Sep 30, 2020 | Sep 29, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | Jul 1, 2020 | — |
| 4 | Insider transaction | Jun 30, 2020 | Jun 26, 2020 |
| 4 | Insider transaction | Jun 30, 2020 | Jun 26, 2020 |
| 4 | Insider transaction | Jun 30, 2020 | Jun 26, 2020 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 30, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Jun 11, 2020 | — |
| 3 | Initial insider ownership | Jun 8, 2020 | May 28, 2020 |
| SC 13D | Ownership over 5% (active) | Jun 8, 2020 | — |
| SC 13D | Ownership over 5% (active) | Jun 8, 2020 | — |
| 3 | Initial insider ownership | Jun 5, 2020 | May 28, 2020 |
| 4 | Insider transaction | Jun 5, 2020 | May 28, 2020 |
| 3 | Initial insider ownership | Jun 5, 2020 | May 28, 2020 |
| 3 | Initial insider ownership | Jun 5, 2020 | May 28, 2020 |
| 3 | Initial insider ownership | Jun 5, 2020 | May 28, 2020 |
| 3 | Initial insider ownership | Jun 5, 2020 | May 28, 2020 |
| 3 | Initial insider ownership | Jun 5, 2020 | May 28, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 5, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 12, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 4, 2020 | — |
| SC 13D | Ownership over 5% (active) | Dec 27, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 19, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Oct 15, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 10, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 18, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Sep 16, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Aug 16, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 10, 2019 | — |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Jun 27, 2019 | Jun 26, 2019 |
| 4 | Insider transaction | Apr 4, 2019 | Apr 2, 2019 |
| SC 13G | Ownership over 5% (passive) | Mar 25, 2019 | — |
| 3 | Initial insider ownership | Mar 11, 2019 | Mar 4, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2019 | — |
| SC 13G | Ownership over 5% (passive) | Feb 8, 2019 | — |
| 4 | Insider transaction | Jan 28, 2019 | Jan 24, 2019 |
| 4 | Insider transaction | Jan 28, 2019 | Jan 24, 2019 |
| 4 | Insider transaction | Jan 28, 2019 | Jan 24, 2019 |
| 4 | Insider transaction | Jan 28, 2019 | Jan 24, 2019 |
| 4 | Insider transaction | Jan 28, 2019 | Jan 24, 2019 |
| 4 | Insider transaction | Jan 24, 2019 | Jan 22, 2019 |
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
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- LRMR (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Bala Cynwyd, PA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1374690
- Former names
- ZAFGEN, INC. (until May 19, 2020); ZAFGEN INC (until Nov 3, 2008)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.