Korro Bio, Inc. SEC filings KRRO
Korro Bio, Inc. has 830 filings in SEC EDGAR's recent list, going back to Apr 14, 2017. Its latest annual report, Form ARS, was filed on Apr 16, 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 (agreement ended, results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Agreement ended, Results of operations
|
Nov 5, 2026 | Nov 3, 2026 |
| 8-K |
Current report
Other events
|
Oct 22, 2026 | Oct 22, 2026 |
| 8-K |
Current report
Other events
|
Oct 5, 2026 | Oct 5, 2026 |
| 8-K |
Current report
Other events
|
Aug 19, 2026 | Aug 19, 2026 |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Material agreement, Results of operations, Unregistered share sale
|
Aug 6, 2026 | Aug 5, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2026 | Jun 10, 2026 |
| 8-K |
Current report
Other events
|
May 19, 2026 | May 19, 2026 |
| 424B3 | Prospectus | May 12, 2026 | — |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 7, 2026 | May 7, 2026 |
| ARS | Annual report to shareholders | Apr 16, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 16, 2026 | — |
| DEF 14A | Proxy statement | Apr 16, 2026 | Jun 10, 2026 |
| EFFECT | Filing | Mar 20, 2026 | — |
| 424B5 | Prospectus supplement | Mar 20, 2026 | — |
| CORRESP | Letter to the SEC | Mar 18, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 18, 2026 | — |
| S-3 | Shelf registration | Mar 13, 2026 | — |
| 10-K | Annual report | Mar 12, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 12, 2026 | Mar 12, 2026 |
| 8-K |
Current report
Material agreement, Results of operations, Unregistered share sale, Regulation FD disclosure
|
Mar 9, 2026 | Mar 9, 2026 |
| S-8 | Employee stock plan registration | Jan 27, 2026 | — |
| 8-K |
Current report
Other events
|
Jan 27, 2026 | Jan 27, 2026 |
| 8-K |
Current report
Other events
|
Jan 15, 2026 | Jan 15, 2026 |
| 8-K |
Current report
Officer or director change
|
Dec 18, 2025 | Dec 15, 2025 |
| 10-Q | Quarterly report | Nov 12, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Material agreement, Results of operations, Exit or restructuring costs, Officer or director change
|
Nov 12, 2025 | Nov 7, 2025 |
| 8-K |
Current report
Officer or director change
|
Oct 8, 2025 | Oct 7, 2025 |
| 10-Q | Quarterly report | Aug 12, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2025 | Aug 12, 2025 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Jun 18, 2025 | Jun 11, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2025 | Jun 11, 2025 |
| 10-Q | Quarterly report | May 7, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations, Exit or restructuring costs
|
May 7, 2025 | May 7, 2025 |
| ARS | Annual report to shareholders | Apr 29, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 29, 2025 | — |
| DEF 14A | Proxy statement | Apr 29, 2025 | Jun 11, 2025 |
| 8-K |
Current report
Officer or director change
|
Mar 27, 2025 | Mar 27, 2025 |
| S-8 | Employee stock plan registration | Mar 18, 2025 | — |
| 10-K | Annual report | Mar 18, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 18, 2025 | Mar 18, 2025 |
| 8-K |
Current report
Officer or director change
|
Feb 11, 2025 | Feb 11, 2025 |
| 8-K |
Current report
Other events
|
Jan 13, 2025 | Jan 13, 2025 |
| 424B3 | Prospectus | Dec 10, 2024 | — |
| 424B3 | Prospectus | Dec 10, 2024 | — |
| EFFECT | Filing | Dec 9, 2024 | — |
| EFFECT | Filing | Dec 9, 2024 | — |
| EFFECT | Filing | Dec 6, 2024 | — |
| 424B5 | Prospectus supplement | Dec 6, 2024 | — |
| CORRESP | Letter to the SEC | Dec 6, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 6, 2024 | — |
| POS AM | Filing | Dec 2, 2024 | — |
| POS AM | Filing | Dec 2, 2024 | — |
| S-3 | Shelf registration | Dec 2, 2024 | — |
| 424B3 | Prospectus | Nov 21, 2024 | — |
| 424B3 | Prospectus | Nov 21, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 21, 2024 | Nov 21, 2024 |
| 424B3 | Prospectus | Nov 12, 2024 | — |
| 424B3 | Prospectus | Nov 12, 2024 | — |
| 10-Q | Quarterly report | Nov 12, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2024 | Nov 12, 2024 |
| 424B3 | Prospectus | Nov 4, 2024 | — |
| 424B3 | Prospectus | Nov 4, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 4, 2024 | Nov 4, 2024 |
| 424B3 | Prospectus | Sep 16, 2024 | — |
| 424B3 | Prospectus | Sep 16, 2024 | — |
| 8-K |
Current report
Material agreement
|
Sep 16, 2024 | Sep 13, 2024 |
| 424B3 | Prospectus | Aug 28, 2024 | — |
| 424B3 | Prospectus | Aug 28, 2024 | — |
| 8-K |
Current report
Officer or director change
|
Aug 28, 2024 | Aug 26, 2024 |
| 424B3 | Prospectus | Aug 13, 2024 | — |
| 424B3 | Prospectus | Aug 13, 2024 | — |
| 10-Q | Quarterly report | Aug 13, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2024 | Aug 13, 2024 |
| 424B3 | Prospectus | Jun 21, 2024 | — |
| 424B3 | Prospectus | Jun 21, 2024 | — |
| 8-K |
Current report
Officer or director change
|
Jun 21, 2024 | Jun 17, 2024 |
| 424B3 | Prospectus | Jun 17, 2024 | — |
| 424B3 | Prospectus | Jun 17, 2024 | — |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Jun 12, 2024 | Jun 11, 2024 |
| EFFECT | Filing | May 22, 2024 | — |
| 424B3 | Prospectus | May 22, 2024 | — |
| CORRESP | Letter to the SEC | May 20, 2024 | — |
| UPLOAD | Letter from the SEC | May 20, 2024 | — |
| S-1 | Registration statement | May 14, 2024 | — |
| 424B3 | Prospectus | May 14, 2024 | — |
| 8-K |
Current report
Other events
|
May 14, 2024 | May 13, 2024 |
| 10-Q | Quarterly report | May 14, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 14, 2024 | May 14, 2024 |
| DEFA14A | Additional proxy material | May 1, 2024 | — |
| ARS | Annual report to shareholders | Apr 29, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 29, 2024 | — |
| DEF 14A | Proxy statement | Apr 29, 2024 | Jun 11, 2024 |
| 424B3 | Prospectus | Apr 22, 2024 | — |
| 8-K |
Current report
Other events
|
Apr 22, 2024 | Apr 22, 2024 |
| PRE 14A | Preliminary proxy statement | Apr 19, 2024 | Jun 11, 2024 |
| 424B3 | Prospectus | Apr 18, 2024 | — |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Apr 18, 2024 | Apr 17, 2024 |
| 424B3 | Prospectus | Mar 28, 2024 | — |
| EFFECT | Filing | Mar 27, 2024 | — |
| POS AM | Filing | Mar 26, 2024 | — |
| S-8 | Employee stock plan registration | Mar 26, 2024 | — |
| 8-K |
Current report
Results of operations
|
Mar 26, 2024 | Mar 26, 2024 |
| 10-K | Annual report | Mar 26, 2024 | Dec 31, 2023 |
| 424B3 | Prospectus | Jan 9, 2024 | — |
| 8-K |
Current report
Other events
|
Jan 9, 2024 | Jan 9, 2024 |
| EFFECT | Filing | Dec 22, 2023 | — |
| 424B3 | Prospectus | Dec 22, 2023 | — |
| CORRESP | Letter to the SEC | Dec 21, 2023 | — |
| CORRESP | Letter to the SEC | Dec 20, 2023 | — |
| S-1/A | Amended registration statement | Dec 20, 2023 | — |
| UPLOAD | Letter from the SEC | Dec 6, 2023 | — |
| CORRESP | Letter to the SEC | Dec 1, 2023 | — |
| S-1/A | Amended registration statement | Dec 1, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Nov 29, 2023 | Nov 27, 2023 |
| UPLOAD | Letter from the SEC | Nov 17, 2023 | — |
| 8-K |
Current report
Officer or director change
|
Nov 14, 2023 | Nov 8, 2023 |
| S-8 | Employee stock plan registration | Nov 6, 2023 | — |
| S-3 | Shelf registration | Nov 6, 2023 | — |
| 8-K |
Current report
Material agreement, Acquisition or sale of assets, Results of operations, Unregistered share sale, Change to shareholder rights, Auditor change, Change in control, Officer or director change, Bylaw or fiscal year change, Shareholder vote results, Regulation FD disclosure, Other events
|
Nov 6, 2023 | Nov 3, 2023 |
| 10-Q | Quarterly report | Nov 2, 2023 | Sep 30, 2023 |
| 425 | Filing | Oct 25, 2023 | — |
| EFFECT | Filing | Sep 29, 2023 | — |
| 424B3 | Prospectus | Sep 29, 2023 | — |
| CORRESP | Letter to the SEC | Sep 28, 2023 | — |
| S-4/A | Filing | Sep 28, 2023 | — |
| 425 | Filing | Sep 27, 2023 | — |
| 8-K |
Current report
Agreement ended, Other events
|
Sep 27, 2023 | Sep 26, 2023 |
| S-4/A | Filing | Sep 21, 2023 | — |
| CORRESP | Letter to the SEC | Sep 20, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 15, 2023 | — |
| S-4/A | Filing | Sep 1, 2023 | — |
| CORRESP | Letter to the SEC | Aug 31, 2023 | — |
| UPLOAD | Letter from the SEC | Aug 24, 2023 | — |
| 8-K |
Current report
Agreement ended
|
Aug 15, 2023 | Aug 11, 2023 |
| 10-Q | Quarterly report | Aug 10, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 10, 2023 | Aug 10, 2023 |
| 8-K |
Current report
Officer or director change
|
Jul 31, 2023 | Jul 28, 2023 |
| S-4 | Registration for a merger or exchange | Jul 27, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| 8-K |
Current report
Material agreement, Change in control, Officer or director change
|
Jul 14, 2023 | Jul 14, 2023 |
| 425 | Filing | Jul 14, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 14, 2023 | Jul 14, 2023 |
| 8-K |
Current report
Exit or restructuring costs, Officer or director change
|
Jun 6, 2023 | May 31, 2023 |
| 10-Q | Quarterly report | May 12, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 12, 2023 | May 12, 2023 |
| 8-K |
Current report
Officer or director change
|
May 10, 2023 | May 5, 2023 |
| 10-K/A | Amended annual report | May 1, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Listing notice, Officer or director change
|
Mar 29, 2023 | Mar 23, 2023 |
| 10-K | Annual report | Mar 10, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 10, 2023 | Mar 10, 2023 |
| 8-K |
Current report
Results of operations, Exit or restructuring costs, Officer or director change, Regulation FD disclosure
|
Feb 13, 2023 | Feb 13, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 13, 2022 | Dec 13, 2022 |
| 10-Q | Quarterly report | Nov 8, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2022 | Nov 8, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 12, 2022 | Sep 12, 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
Material agreement
|
Jul 12, 2022 | Jul 8, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Jun 23, 2022 | Jun 21, 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 29, 2022 | — |
| DEF 14A | Proxy statement | Apr 29, 2022 | Jun 21, 2022 |
| 8-K |
Current report
Officer or director change
|
Apr 15, 2022 | Apr 11, 2022 |
| 8-K |
Current report
Exit or restructuring costs, Officer or director change, Regulation FD disclosure
|
Apr 8, 2022 | Apr 5, 2022 |
| 8-K |
Current report
Officer or director change
|
Mar 31, 2022 | Mar 25, 2022 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Mar 18, 2022 | Mar 18, 2022 |
| S-8 | Employee stock plan registration | Mar 17, 2022 | — |
| 10-K | Annual report | Mar 15, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Mar 15, 2022 | Mar 15, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 13, 2022 | Jan 13, 2022 |
| 8-K |
Current report
Material agreement
|
Dec 10, 2021 | Dec 10, 2021 |
| 424B5 | Prospectus supplement | Dec 10, 2021 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Dec 9, 2021 | Dec 9, 2021 |
| 10-Q | Quarterly report | Nov 15, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Results of operations
|
Nov 15, 2021 | Nov 15, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Nov 9, 2021 | Nov 9, 2021 |
| 8-K |
Current report
Other events
|
Oct 21, 2021 | Oct 21, 2021 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 22, 2021 | Sep 22, 2021 |
| 10-Q | Quarterly report | Aug 12, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 12, 2021 | Aug 12, 2021 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 30, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Shareholder vote results
|
Jun 21, 2021 | Jun 17, 2021 |
| 10-Q | Quarterly report | May 13, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 13, 2021 | May 13, 2021 |
| DEFA14A | Additional proxy material | Apr 29, 2021 | — |
| DEF 14A | Proxy statement | Apr 29, 2021 | Jun 17, 2021 |
| 10-K | Annual report | Mar 29, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 29, 2021 | Mar 29, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure, Other events
|
Mar 23, 2021 | Mar 23, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Feb 22, 2021 | Feb 22, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 11, 2021 | Jan 11, 2021 |
| 8-K |
Current report
Agreement ended
|
Dec 16, 2020 | Dec 11, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 15, 2020 | Dec 11, 2020 |
| 8-K |
Current report
Officer or director change
|
Dec 1, 2020 | Dec 1, 2020 |
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
- KRRO (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Cambridge, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1703647
- Former names
- Frequency Therapeutics, Inc. (until Nov 6, 2023)
Other Pharmaceutical Preparations companies
- ELI LILLY & Co LLY
- Johnson & Johnson JNJ
- AbbVie Inc. ABBV
- Merck & Co., Inc. MRK
- Novartis AG NVS
- Astrazeneca PLC AZN
- Abbott Laboratories ABT
- Novo Nordisk A S NVO
Source: SEC EDGAR filings. This is company-reported data, not investment advice.