Korsana Biosciences, Inc. SEC filings KRSA
Korsana Biosciences, Inc. has 391 filings in SEC EDGAR's recent list, going back to Oct 9, 2018. Its latest annual report, Form 10-K, was filed on Mar 30, 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 |
|---|---|---|---|
| 144 | Notice of proposed sale | Oct 22, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 15, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 7, 2026 | — |
| 144 | Notice of proposed sale | Sep 23, 2026 | — |
| 144 | Notice of proposed sale | Sep 22, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Sep 18, 2026 | — |
| 144 | Notice of proposed sale | Sep 18, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Sep 16, 2026 | — |
| SCHEDULE 13D | Ownership over 5% (active) | Sep 15, 2026 | — |
| SCHEDULE 13D | Ownership over 5% (active) | Sep 11, 2026 | — |
| 4 | Insider transaction | Sep 10, 2026 | Sep 9, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 9, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 9, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 9, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 3 | Initial insider ownership | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jul 20, 2026 | — |
| 4 | Insider transaction | Jul 20, 2026 | Jul 16, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 7, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Oct 17, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 11, 2025 | Aug 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Mar 28, 2025 | — |
| 4 | Insider transaction | Mar 27, 2025 | Mar 25, 2025 |
| 4 | Insider transaction | Mar 27, 2025 | Mar 25, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 6, 2024 | — |
| 4 | Insider transaction | Nov 25, 2024 | Nov 21, 2024 |
| 4 | Insider transaction | Aug 7, 2024 | Aug 5, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 12, 2024 | — |
| 3 | Initial insider ownership | Mar 11, 2024 | Mar 4, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| 4 | Insider transaction | Jan 26, 2024 | Jan 1, 2024 |
| 4 | Insider transaction | Jan 26, 2024 | Jan 1, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 22, 2024 | — |
| 3 | Initial insider ownership | Dec 11, 2023 | Nov 30, 2023 |
| 3 | Initial insider ownership | Dec 7, 2023 | Nov 30, 2023 |
| 3/A | Filing | Dec 7, 2023 | Dec 1, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | Dec 5, 2023 | — |
| 3 | Initial insider ownership | Dec 4, 2023 | Dec 1, 2023 |
| 4 | Insider transaction | Dec 4, 2023 | Nov 30, 2023 |
| 4 | Insider transaction | Dec 4, 2023 | Nov 30, 2023 |
| 4 | Insider transaction | Dec 4, 2023 | Nov 30, 2023 |
| 4 | Insider transaction | Dec 4, 2023 | Nov 30, 2023 |
| SC 13G | Ownership over 5% (passive) | Sep 5, 2023 | — |
| 4 | Insider transaction | Aug 11, 2023 | Aug 9, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | May 23, 2023 | — |
| 4 | Insider transaction | May 22, 2023 | May 19, 2023 |
| SC 13D/A | Amended ownership over 5% (active) | May 12, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Apr 3, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Jan 13, 2023 | — |
| SC 13D/A | Amended ownership over 5% (active) | Nov 21, 2022 | — |
| SC 13D | Ownership over 5% (active) | Oct 21, 2022 | — |
| 4/A | Form 4/a | Jul 27, 2022 | Jul 25, 2022 |
| 4 | Insider transaction | Jul 26, 2022 | Jul 25, 2022 |
| 3 | Initial insider ownership | Jul 26, 2022 | Jul 25, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 14, 2022 |
| 4 | Insider transaction | Jun 16, 2022 | Jun 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 9, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| 4 | Insider transaction | Jan 24, 2022 | Jan 20, 2022 |
| 4 | Insider transaction | Jan 24, 2022 | Jan 20, 2022 |
| 4 | Insider transaction | Jan 24, 2022 | Jan 3, 2022 |
| 4 | Insider transaction | Jan 24, 2022 | Jan 20, 2022 |
| 4 | Insider transaction | Dec 10, 2021 | Dec 9, 2021 |
| 4 | Insider transaction | Dec 10, 2021 | Dec 9, 2021 |
| 4 | Insider transaction | Dec 10, 2021 | Dec 9, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 28, 2021 | Jun 24, 2021 |
| 4 | Insider transaction | Jun 7, 2021 | Jun 3, 2021 |
| 4 | Insider transaction | Jun 7, 2021 | Jun 3, 2021 |
| SC 13D/A | Amended ownership over 5% (active) | Jun 7, 2021 | — |
| 4 | Insider transaction | Jun 7, 2021 | Jun 3, 2021 |
| 3 | Initial insider ownership | May 19, 2021 | Apr 21, 2021 |
| SC 13D | Ownership over 5% (active) | May 14, 2021 | — |
| 4 | Insider transaction | May 10, 2021 | May 6, 2021 |
| 4 | Insider transaction | May 6, 2021 | May 4, 2021 |
| 4 | Insider transaction | Mar 1, 2021 | Feb 25, 2021 |
| 4 | Insider transaction | Mar 1, 2021 | Feb 25, 2021 |
| SC 13G/A | Amended 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 8, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2021 | — |
| 3 | Initial insider ownership | Jan 11, 2021 | Jan 1, 2021 |
| 3 | Initial insider ownership | Jan 11, 2021 | Jan 1, 2021 |
| 3 | Initial insider ownership | Dec 30, 2020 | Dec 16, 2020 |
| 4 | Insider transaction | Dec 30, 2020 | Dec 28, 2020 |
| 4 | Insider transaction | Nov 12, 2020 | Nov 9, 2020 |
| 4 | Insider transaction | Nov 10, 2020 | Nov 6, 2020 |
| 4 | Insider transaction | Nov 6, 2020 | Nov 4, 2020 |
| SC 13G/A | Amended ownership over 5% (passive) | Sep 9, 2020 | — |
| 3 | Initial insider ownership | Aug 10, 2020 | Jul 29, 2020 |
| SC 13G | Ownership over 5% (passive) | Aug 10, 2020 | — |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Jun 18, 2020 | Jun 16, 2020 |
| 4 | Insider transaction | Apr 2, 2020 | Mar 31, 2020 |
| 4 | Insider transaction | Feb 25, 2020 | Feb 21, 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 13, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 7, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 7, 2020 | — |
| SC 13G | Ownership over 5% (passive) | Feb 3, 2020 | — |
| 4 | Insider transaction | Dec 31, 2019 | Dec 27, 2019 |
| SC 13G | Ownership over 5% (passive) | Dec 27, 2019 | — |
| 4 | Insider transaction | Nov 26, 2019 | Nov 22, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 22, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 22, 2019 |
| 4 | Insider transaction | Nov 26, 2019 | Nov 22, 2019 |
| 4 | Insider transaction | Nov 19, 2019 | Nov 15, 2019 |
| 4 | Insider transaction | Nov 12, 2019 | Nov 8, 2019 |
| 4/A | Form 4/a submission | Sep 20, 2019 | Apr 1, 2019 |
| 4/A | Form 4/a submission | Sep 20, 2019 | Apr 1, 2019 |
| 4/A | Form 4/a submission | Sep 20, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Jul 12, 2019 | Jul 10, 2019 |
| SC 13G | Ownership over 5% (passive) | Jun 17, 2019 | — |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | Jun 4, 2019 | Jun 1, 2019 |
| 4 | Insider transaction | May 1, 2019 | Apr 29, 2019 |
| 3 | Initial insider ownership | May 1, 2019 | Apr 29, 2019 |
| SC 13G | Ownership over 5% (passive) | Apr 11, 2019 | — |
| 4 | Insider transaction | Apr 10, 2019 | Apr 8, 2019 |
| 4 | Insider transaction | Apr 10, 2019 | Apr 8, 2019 |
| 4/A | Form 4/a submission | Apr 4, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 4/A | Form 4/a submission | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 3, 2019 | Apr 1, 2019 |
| 3 | Initial insider ownership | Apr 3, 2019 | Apr 1, 2019 |
| 4 | Insider transaction | Apr 2, 2019 | Mar 29, 2019 |
| 3 | Initial insider ownership | Mar 15, 2019 | Mar 14, 2019 |
| 3 | Initial insider ownership | Mar 14, 2019 | Mar 14, 2019 |
| 3 | Initial insider ownership | Mar 14, 2019 | Mar 14, 2019 |
| 3 | Initial insider ownership | Mar 14, 2019 | Mar 14, 2019 |
Showing 191 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
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- KRSA (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- MA
- Headquarters
- Waltham, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1755237
- Former names
- Cyclerion Therapeutics, Inc. (until Aug 27, 2026)
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- Abbott Laboratories ABT
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.