Synlogic, Inc. SEC filings SYBX
Synlogic, Inc. has 627 filings in SEC EDGAR's recent list, going back to Aug 23, 2011. Its latest annual report, Form 10-K, was filed on Mar 12, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 11, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Jul 29, 2026 (material agreement, change to shareholder rights, change in control, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Aug 14, 2026 | Jul 27, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 29, 2026 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 29, 2026 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Apr 6, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 23, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2025 | — |
| 4 | Insider transaction | Oct 31, 2025 | Oct 29, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 26, 2025 |
| 4 | Insider transaction | Apr 29, 2025 | Apr 26, 2025 |
| 4 | Insider transaction | Apr 3, 2025 | Apr 2, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 25, 2025 | — |
| 4 | Insider transaction | Feb 4, 2025 | Feb 3, 2025 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 4 | Insider transaction | Oct 30, 2024 | Oct 29, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | May 16, 2024 | — |
| 144 | Notice of proposed sale | Apr 22, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Apr 18, 2024 | — |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 4 | Insider transaction | Apr 4, 2024 | Apr 2, 2024 |
| 3 | Initial insider ownership | Mar 21, 2024 | Mar 18, 2024 |
| 4 | Insider transaction | Mar 21, 2024 | Mar 19, 2024 |
| 3 | Initial insider ownership | Mar 21, 2024 | Mar 19, 2024 |
| 144 | Notice of proposed sale | Mar 21, 2024 | — |
| 3 | Initial insider ownership | Feb 16, 2024 | Feb 9, 2024 |
| SC 13D | Ownership over 5% (active) | Feb 16, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Jan 4, 2024 | Jan 2, 2024 |
| 4 | Insider transaction | Nov 14, 2023 | Nov 10, 2023 |
| 4 | Insider transaction | Nov 14, 2023 | Nov 10, 2023 |
| 4 | Insider transaction | Nov 14, 2023 | Nov 10, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 13, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 13, 2023 | — |
| 3 | Initial insider ownership | Oct 6, 2023 | Oct 3, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 4, 2023 | — |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 26, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Apr 5, 2023 | Apr 3, 2023 |
| 4 | Insider transaction | Apr 5, 2023 | Apr 3, 2023 |
| 4 | Insider transaction | Apr 5, 2023 | Apr 3, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 20, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Jan 20, 2023 | — |
| 4 | Insider transaction | Jan 4, 2023 | Jan 3, 2023 |
| 4 | Insider transaction | Jan 4, 2023 | Jan 3, 2023 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | Jun 13, 2022 | Jun 9, 2022 |
| 4 | Insider transaction | May 25, 2022 | May 24, 2022 |
| 4 | Insider transaction | Apr 6, 2022 | Apr 4, 2022 |
| 4 | Insider transaction | Apr 6, 2022 | Apr 4, 2022 |
| 4 | Insider transaction | Mar 3, 2022 | Mar 3, 2022 |
| 3 | Initial insider ownership | Mar 3, 2022 | Mar 3, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| 4 | Insider transaction | Feb 8, 2022 | Feb 4, 2022 |
| 4 | Insider transaction | Feb 8, 2022 | Feb 4, 2022 |
| 4 | Insider transaction | Feb 1, 2022 | Dec 6, 2021 |
| 4 | Insider transaction | Jan 5, 2022 | Jan 3, 2022 |
| SC 13G | Ownership over 5% (passive) | Oct 1, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | Sep 29, 2021 | — |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| 4 | Insider transaction | Jun 14, 2021 | Jun 10, 2021 |
| SC 13G | Ownership over 5% (passive) | May 10, 2021 | — |
| 4 | Insider transaction | Apr 22, 2021 | Apr 20, 2021 |
| 4 | Insider transaction | Apr 22, 2021 | Apr 20, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | Apr 22, 2021 | — |
| SC 13D/A | Amended ownership over 5% (active) | Mar 29, 2021 | — |
| 4 | Insider transaction | Mar 12, 2021 | Mar 10, 2021 |
| 4 | Insider transaction | Mar 12, 2021 | Mar 10, 2021 |
| 4 | Insider transaction | Mar 12, 2021 | Mar 10, 2021 |
| 4 | Insider transaction | Feb 11, 2021 | Feb 9, 2021 |
| 3 | Initial insider ownership | Feb 11, 2021 | Feb 9, 2021 |
| 4 | Insider transaction | Jan 5, 2021 | Jan 4, 2021 |
| 4 | Insider transaction | Dec 9, 2020 | Dec 8, 2020 |
| 3 | Initial insider ownership | Dec 9, 2020 | Dec 8, 2020 |
| 3 | Initial insider ownership | Aug 10, 2020 | Jul 30, 2020 |
| 4 | Insider transaction | Jul 28, 2020 | Jul 24, 2020 |
| 4 | Insider transaction | Jul 28, 2020 | Jan 2, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Jun 8, 2020 | Jun 4, 2020 |
| 4 | Insider transaction | Mar 12, 2020 | Mar 10, 2020 |
| 4 | Insider transaction | Mar 12, 2020 | Mar 10, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2020 | — |
| 4 | Insider transaction | Feb 4, 2020 | Feb 3, 2020 |
| 3 | Initial insider ownership | Feb 4, 2020 | Feb 3, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 7, 2020 | — |
| 4 | Insider transaction | Jan 2, 2020 | Dec 31, 2019 |
| 4 | Insider transaction | Dec 16, 2019 | Dec 13, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Dec 9, 2019 | — |
| 4 | Insider transaction | Oct 24, 2019 | Oct 23, 2019 |
| 3 | Initial insider ownership | Oct 24, 2019 | Oct 21, 2019 |
| 4 | Insider transaction | Sep 25, 2019 | Sep 23, 2019 |
| 4 | Insider transaction | Sep 25, 2019 | Sep 23, 2019 |
| 4 | Insider transaction | Sep 25, 2019 | Sep 23, 2019 |
| 3 | Initial insider ownership | Sep 18, 2019 | Sep 16, 2019 |
| SC 13D/A | Amended ownership over 5% (active) | Aug 12, 2019 | — |
| 4 | Insider transaction | Jul 1, 2019 | Jun 28, 2019 |
| 3 | Initial insider ownership | Jun 21, 2019 | Jun 11, 2019 |
| SC 13G | Ownership over 5% (passive) | Jun 21, 2019 | — |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 4 | Insider transaction | Jun 7, 2019 | Jun 5, 2019 |
| 3 | Initial insider ownership | May 7, 2019 | May 6, 2019 |
| 4 | Insider transaction | Apr 9, 2019 | Jan 2, 2019 |
| 4 | Insider transaction | Mar 6, 2019 | Mar 5, 2019 |
| 4 | Insider transaction | Mar 6, 2019 | Mar 5, 2019 |
| 4 | Insider transaction | Feb 14, 2019 | Feb 12, 2019 |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2019 | — |
| 4 | Insider transaction | Feb 12, 2019 | Feb 11, 2019 |
| 3 | Initial insider ownership | Feb 12, 2019 | Feb 11, 2019 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2019 | — |
| 4 | Insider transaction | Nov 1, 2018 | Oct 31, 2018 |
| 4 | Insider transaction | Oct 19, 2018 | Oct 18, 2018 |
| 4 | Insider transaction | Sep 19, 2018 | Sep 18, 2018 |
| 4 | Insider transaction | Sep 7, 2018 | Sep 5, 2018 |
| 4 | Insider transaction | Aug 31, 2018 | Aug 29, 2018 |
| 4 | Insider transaction | Jul 19, 2018 | Jul 18, 2018 |
| 4 | Insider transaction | Jun 21, 2018 | Jun 19, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 13, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 13, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 13, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 13, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 13, 2018 |
| 4 | Insider transaction | Jun 14, 2018 | Jun 13, 2018 |
| 4 | Insider transaction | Jun 6, 2018 | Jun 5, 2018 |
| SC 13G | Ownership over 5% (passive) | May 10, 2018 | — |
| SC 13G | Ownership over 5% (passive) | Apr 16, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 12, 2018 | — |
| 4 | Insider transaction | Mar 16, 2018 | Mar 14, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 14, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 14, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 14, 2018 |
| 4 | Insider transaction | Mar 15, 2018 | Mar 14, 2018 |
| SC 13D/A | Amended ownership over 5% (active) | Feb 14, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2018 | — |
| 5 | Annual insider ownership | Feb 13, 2018 | Dec 31, 2017 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Feb 1, 2018 | — |
| 4 | Insider transaction | Jan 30, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 30, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 30, 2018 | Jan 26, 2018 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 29, 2018 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jan 26, 2018 | — |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 26, 2018 | Jan 26, 2018 |
| 4 | Insider transaction | Jan 3, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Jan 3, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Jan 3, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Jan 3, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Jan 3, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Jan 3, 2018 | Dec 29, 2017 |
| 4 | Insider transaction | Dec 22, 2017 | Oct 31, 2017 |
| 3 | Initial insider ownership | Oct 10, 2017 | Oct 9, 2017 |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 28, 2017 | — |
| SC 13D | Ownership over 5% (active) | Sep 7, 2017 | — |
| SC 13D/A | Amended ownership over 5% (active) | Sep 7, 2017 | — |
| SC 13G | Ownership over 5% (passive) | Sep 6, 2017 | — |
| 4 | Insider transaction | Aug 30, 2017 | Aug 28, 2017 |
| 4 | Insider transaction | Aug 30, 2017 | Aug 28, 2017 |
| 4 | Insider transaction | Aug 30, 2017 | Aug 28, 2017 |
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
- SYBX (OTC)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Winchester, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1527599
- Former names
- Mirna Therapeutics, Inc. (until Aug 25, 2017)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.