Korsana Biosciences, Inc. SEC filings KRSA
Korsana Biosciences, Inc. has 389 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 Aug 4, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 11, 2026 (material agreement, acquisition or sale of assets, results of operations, unregistered share sale, change to shareholder rights, change in control, officer or director change, bylaw or fiscal year change, regulation fd disclosure). 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 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Results of operations, Unregistered share sale, Change to shareholder rights, Change in control, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure
|
Sep 11, 2026 | Sep 8, 2026 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Aug 27, 2026 | Aug 26, 2026 |
| 425 | Filing | Aug 25, 2026 | — |
| 8-K |
Current report
Other events
|
Aug 25, 2026 | Aug 25, 2026 |
| 425 | Filing | Aug 12, 2026 | — |
| 425 | Filing | Aug 10, 2026 | — |
| 425 | Filing | Aug 6, 2026 | — |
| 10-Q | Quarterly report | Aug 4, 2026 | Jun 30, 2026 |
| 425 | Filing | Aug 3, 2026 | — |
| EFFECT | Filing | Jul 24, 2026 | — |
| 424B3 | Prospectus | Jul 24, 2026 | — |
| S-4/A | Filing | Jul 22, 2026 | — |
| 425 | Filing | Jul 10, 2026 | — |
| S-4/A | Filing | Jul 10, 2026 | — |
| S-4/A | Filing | Jun 9, 2026 | — |
| 10-Q | Quarterly report | May 12, 2026 | Mar 31, 2026 |
| 10-K/A | Amended annual report | Apr 30, 2026 | Dec 31, 2025 |
| S-4 | Registration for a merger or exchange | Apr 20, 2026 | — |
| 425 | Filing | Apr 1, 2026 | — |
| 8-K |
Current report
Material agreement, Change in control, Officer or director change, Regulation FD disclosure
|
Apr 1, 2026 | Apr 1, 2026 |
| 10-K | Annual report | Mar 30, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 17, 2026 | Feb 17, 2026 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jan 6, 2026 | Jan 3, 2026 |
| 8-K |
Current report
Other events
|
Dec 1, 2025 | Dec 1, 2025 |
| 10-Q | Quarterly report | Nov 12, 2025 | Sep 30, 2025 |
| 10-K/A | Amended annual report | Nov 12, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Sep 23, 2025 | Sep 19, 2025 |
| 10-Q | Quarterly report | Aug 5, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 18, 2025 | Jun 16, 2025 |
| EFFECT | Filing | May 15, 2025 | — |
| CORRESP | Letter to the SEC | May 13, 2025 | — |
| UPLOAD | Letter from the SEC | May 12, 2025 | — |
| 8-K |
Current report
Material agreement
|
May 7, 2025 | May 7, 2025 |
| 424B5 | Prospectus supplement | May 7, 2025 | — |
| S-3 | Shelf registration | May 6, 2025 | — |
| 10-Q | Quarterly report | May 6, 2025 | Mar 31, 2025 |
| DEFA14A | Additional proxy material | Apr 29, 2025 | — |
| DEF 14A | Proxy statement | Apr 29, 2025 | Jun 16, 2025 |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Mar 25, 2025 | Mar 21, 2025 |
| 10-K | Annual report | Mar 4, 2025 | Dec 31, 2024 |
| EFFECT | Filing | Feb 12, 2025 | — |
| CORRESP | Letter to the SEC | Feb 10, 2025 | — |
| UPLOAD | Letter from the SEC | Feb 7, 2025 | — |
| S-3 | Shelf registration | Feb 4, 2025 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Dec 17, 2024 | Dec 13, 2024 |
| 10-Q | Quarterly report | Nov 14, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 7, 2024 | Aug 7, 2024 |
| 10-Q | Quarterly report | Aug 7, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Jun 14, 2024 | Jun 14, 2024 |
| 10-Q | Quarterly report | May 7, 2024 | Mar 31, 2024 |
| DEFA14A | Additional proxy material | Apr 29, 2024 | — |
| DEF 14A | Proxy statement | Apr 29, 2024 | Jun 14, 2024 |
| 8-K |
Current report
Other events
|
Apr 18, 2024 | Apr 18, 2024 |
| 10-K | Annual report | Mar 5, 2024 | Dec 31, 2023 |
| UPLOAD | Letter from the SEC | Dec 28, 2023 | — |
| CORRESP | Letter to the SEC | Dec 12, 2023 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 4, 2023 | Dec 1, 2023 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 1, 2023 | Nov 30, 2023 |
| UPLOAD | Letter from the SEC | Nov 28, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Nov 24, 2023 | Nov 19, 2023 |
| 10-Q | Quarterly report | Nov 13, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Officer or director change
|
Oct 23, 2023 | Oct 17, 2023 |
| S-8 | Employee stock plan registration | Jul 31, 2023 | — |
| 10-Q | Quarterly report | Jul 28, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Jul 19, 2023 | Jul 19, 2023 |
| 8-K |
Current report
Other events
|
Jul 12, 2023 | Jul 12, 2023 |
| 8-K |
Current report
Officer or director change
|
Jun 27, 2023 | Jun 27, 2023 |
| DEFM14A | Filing | Jun 20, 2023 | — |
| PREM14A | Filing | Jun 9, 2023 | Jun 9, 2023 |
| 8-K |
Current report
Other events
|
Jun 1, 2023 | Jun 1, 2023 |
| D | Filing | May 25, 2023 | — |
| 8-K |
Current report
Unregistered share sale, Bylaw or fiscal year change
|
May 25, 2023 | May 19, 2023 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Shareholder vote results, Regulation FD disclosure, Other events
|
May 15, 2023 | May 15, 2023 |
| 10-Q | Quarterly report | May 12, 2023 | Mar 31, 2023 |
| DEFA14A | Additional proxy material | May 12, 2023 | — |
| 8-K |
Current report
Material agreement, Results of operations, Unregistered share sale, Regulation FD disclosure, Other events
|
May 12, 2023 | May 11, 2023 |
| DEFA14A | Additional proxy material | Apr 3, 2023 | — |
| DEF 14A | Proxy statement | Apr 3, 2023 | May 15, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 3, 2023 | Mar 31, 2023 |
| PRE 14A | Preliminary proxy statement | Mar 22, 2023 | May 15, 2023 |
| 10-K | Annual report | Mar 22, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 22, 2023 | Mar 22, 2023 |
| 8-K |
Current report
Listing notice
|
Nov 29, 2022 | Nov 29, 2022 |
| 8-K |
Current report
Other events
|
Nov 22, 2022 | Nov 22, 2022 |
| 10-Q | Quarterly report | Nov 3, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Exit or restructuring costs, Regulation FD disclosure
|
Oct 6, 2022 | Oct 6, 2022 |
| 8-K |
Current report
Officer or director change
|
Sep 30, 2022 | Sep 30, 2022 |
| S-8 | Employee stock plan registration | Aug 10, 2022 | — |
| 10-Q | Quarterly report | Aug 9, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2022 | Aug 9, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 28, 2022 | Jul 28, 2022 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jul 26, 2022 | Jul 26, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Jun 15, 2022 | Jun 15, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 10, 2022 | Jun 10, 2022 |
| 8-K |
Current report
Listing notice
|
Jun 3, 2022 | Jun 3, 2022 |
| 10-Q | Quarterly report | May 4, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Results of operations
|
May 4, 2022 | May 4, 2022 |
| DEFA14A | Additional proxy material | Apr 26, 2022 | — |
| DEF 14A | Proxy statement | Apr 26, 2022 | Jun 14, 2022 |
| 10-K | Annual report | Feb 24, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 24, 2022 | Feb 24, 2022 |
| 10-Q | Quarterly report | Nov 9, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2021 | Nov 9, 2021 |
| 8-K |
Current report
Officer or director change
|
Oct 28, 2021 | Oct 27, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 30, 2021 | Sep 30, 2021 |
| UPLOAD | Letter from the SEC | Sep 7, 2021 | — |
| 10-Q/A | Amended quarterly report | Aug 27, 2021 | Jun 30, 2021 |
| 10-Q/A | Amended quarterly report | Aug 27, 2021 | Mar 31, 2021 |
| 10-K/A | Amended annual report | Aug 27, 2021 | Dec 31, 2020 |
| CORRESP | Letter to the SEC | Aug 27, 2021 | — |
| UPLOAD | Letter from the SEC | Aug 24, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Aug 19, 2021 | Aug 18, 2021 |
| S-8 | Employee stock plan registration | Jul 30, 2021 | — |
| 10-Q | Quarterly report | Jul 29, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations
|
Jul 29, 2021 | Jul 29, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Jun 25, 2021 | Jun 24, 2021 |
| 424B4 | Prospectus | Jun 24, 2021 | — |
| EFFECT | Filing | Jun 23, 2021 | — |
| S-3/A | Filing | Jun 23, 2021 | — |
| CORRESP | Letter to the SEC | Jun 21, 2021 | — |
| UPLOAD | Letter from the SEC | Jun 21, 2021 | — |
| D | Filing | Jun 17, 2021 | — |
| S-3 | Shelf registration | Jun 16, 2021 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale
|
Jun 4, 2021 | Jun 3, 2021 |
| 8-K |
Current report
Agreement ended
|
May 4, 2021 | Apr 30, 2021 |
| 10-Q | Quarterly report | Apr 30, 2021 | Mar 31, 2021 |
| DEFA14A | Additional proxy material | Apr 28, 2021 | — |
| DEF 14A | Proxy statement | Apr 28, 2021 | Jun 24, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 27, 2021 | Apr 27, 2021 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Apr 26, 2021 | Apr 21, 2021 |
| 8-K/A |
Amended current report
Other events
|
Mar 19, 2021 | Mar 18, 2021 |
| 8-K |
Current report
Other events
|
Mar 18, 2021 | Mar 18, 2021 |
| 10-K | Annual report | Feb 25, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 13, 2021 | Jan 13, 2021 |
| 8-K |
Current report
Officer or director change
|
Dec 21, 2020 | Dec 16, 2020 |
| 10-Q | Quarterly report | Nov 5, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Other events
|
Oct 14, 2020 | Oct 14, 2020 |
| 8-K |
Current report
Other events
|
Oct 1, 2020 | Oct 1, 2020 |
| S-8 | Employee stock plan registration | Sep 22, 2020 | — |
| 424B5 | Prospectus supplement | Sep 3, 2020 | — |
| 8-K |
Current report
Material agreement
|
Sep 3, 2020 | Sep 3, 2020 |
| 424B4 | Prospectus | Aug 17, 2020 | — |
| EFFECT | Filing | Aug 14, 2020 | — |
| UPLOAD | Letter from the SEC | Aug 12, 2020 | — |
| CORRESP | Letter to the SEC | Aug 12, 2020 | — |
| D | Filing | Aug 11, 2020 | — |
| S-3 | Shelf registration | Aug 7, 2020 | — |
| 8-K |
Current report
Results of operations
|
Aug 3, 2020 | Aug 3, 2020 |
| 10-Q | Quarterly report | Aug 3, 2020 | Jun 30, 2020 |
| EFFECT | Filing | Jul 31, 2020 | — |
| CORRESP | Letter to the SEC | Jul 30, 2020 | — |
| S-3/A | Form s-3/a | Jul 30, 2020 | — |
| UPLOAD | Letter from the SEC | Jul 30, 2020 | — |
| S-3 | Shelf registration | Jul 24, 2020 | — |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 9, 2020 | Jul 9, 2020 |
| 8-K |
Current report
Shareholder vote results, Regulation FD disclosure
|
Jun 18, 2020 | Jun 16, 2020 |
| 10-Q | Quarterly report | May 4, 2020 | Mar 31, 2020 |
| DEFA14A | Additional proxy material | Apr 23, 2020 | — |
| DEF 14A | Proxy statement | Apr 23, 2020 | Jun 16, 2020 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Apr 14, 2020 | Apr 10, 2020 |
| 10-K | Annual report | Mar 12, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Material agreement
|
Mar 5, 2020 | Feb 28, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 13, 2020 | Jan 13, 2020 |
| 10-Q | Quarterly report | Nov 12, 2019 | Sep 30, 2019 |
| 8-K |
Current report
Results of operations, Exit or restructuring costs, Other events
|
Oct 30, 2019 | Oct 29, 2019 |
| 8-K |
Current report
Officer or director change
|
Sep 25, 2019 | Sep 23, 2019 |
| 10-Q | Quarterly report | Aug 12, 2019 | Jun 30, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2019 | Aug 12, 2019 |
| 10-Q | Quarterly report | May 13, 2019 | Mar 31, 2019 |
| 8-K |
Current report
Results of operations
|
May 13, 2019 | May 13, 2019 |
| EFFECT | Filing | Apr 23, 2019 | — |
| 424B3 | Prospectus | Apr 23, 2019 | — |
| CORRESP | Letter to the SEC | Apr 22, 2019 | — |
| S-1 | Registration statement | Apr 18, 2019 | — |
| D | Filing | Apr 17, 2019 | — |
| UPLOAD | Letter from the SEC | Apr 16, 2019 | — |
| DRS | Filing | Apr 9, 2019 | — |
| 8-K |
Current report
Other events
|
Apr 9, 2019 | Apr 9, 2019 |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Unregistered share sale, Change to shareholder rights, Change in control, Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure
|
Apr 2, 2019 | Mar 29, 2019 |
| S-8 | Employee stock plan registration | Mar 29, 2019 | — |
| 8-K |
Current report
Officer or director change
|
Mar 19, 2019 | Mar 14, 2019 |
| SEC STAFF ACTION | Filing | Mar 14, 2019 | — |
| UPLOAD | Letter from the SEC | Mar 14, 2019 | — |
| CERT | Filing | Mar 14, 2019 | — |
| CORRESP | Letter to the SEC | Mar 12, 2019 | — |
| 10-12B/A | Filing | Mar 11, 2019 | — |
| 10-12B/A | Filing | Mar 4, 2019 | — |
| 10-12B | Filing | Jan 28, 2019 | — |
| DRSLTR | Filing | Jan 7, 2019 | — |
| DRS/A | Filing | Jan 7, 2019 | — |
| UPLOAD | Letter from the SEC | Dec 18, 2018 | — |
| DRSLTR | Filing | Dec 6, 2018 | — |
| DRS/A | Filing | Dec 6, 2018 | — |
| UPLOAD | Letter from the SEC | Nov 6, 2018 | — |
| DRSLTR | Filing | Oct 9, 2018 | — |
| DRS | Filing | Oct 9, 2018 | — |
Showing 198 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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- ELI LILLY & Co LLY
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- Abbott Laboratories ABT
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.