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 |
|---|---|---|---|
| DEF 14A | Proxy statement | Oct 15, 2026 | Nov 13, 2026 |
| PRE 14A | Preliminary proxy statement | Oct 5, 2026 | Oct 5, 2026 |
| DEFA14A | Additional proxy material | Apr 29, 2025 | — |
| DEF 14A | Proxy statement | Apr 29, 2025 | Jun 16, 2025 |
| DEFA14A | Additional proxy material | Apr 29, 2024 | — |
| DEF 14A | Proxy statement | Apr 29, 2024 | Jun 14, 2024 |
| DEFM14A | Filing | Jun 20, 2023 | — |
| PREM14A | Filing | Jun 9, 2023 | Jun 9, 2023 |
| DEFA14A | Additional proxy material | May 12, 2023 | — |
| DEFA14A | Additional proxy material | Apr 3, 2023 | — |
| DEF 14A | Proxy statement | Apr 3, 2023 | May 15, 2023 |
| PRE 14A | Preliminary proxy statement | Mar 22, 2023 | May 15, 2023 |
| DEFA14A | Additional proxy material | Apr 26, 2022 | — |
| DEF 14A | Proxy statement | Apr 26, 2022 | Jun 14, 2022 |
| DEFA14A | Additional proxy material | Apr 28, 2021 | — |
| DEF 14A | Proxy statement | Apr 28, 2021 | Jun 24, 2021 |
| DEFA14A | Additional proxy material | Apr 23, 2020 | — |
| DEF 14A | Proxy statement | Apr 23, 2020 | Jun 16, 2020 |
Showing 18 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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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Source: SEC EDGAR filings. This is company-reported data, not investment advice.