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 |
|---|---|---|---|
| EFFECT | Filing | Mar 20, 2026 | — |
| CORRESP | Letter to the SEC | Mar 18, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 18, 2026 | — |
| EFFECT | Filing | Dec 9, 2024 | — |
| EFFECT | Filing | Dec 9, 2024 | — |
| EFFECT | Filing | Dec 6, 2024 | — |
| CORRESP | Letter to the SEC | Dec 6, 2024 | — |
| UPLOAD | Letter from the SEC | Dec 6, 2024 | — |
| EFFECT | Filing | May 22, 2024 | — |
| CORRESP | Letter to the SEC | May 20, 2024 | — |
| UPLOAD | Letter from the SEC | May 20, 2024 | — |
| EFFECT | Filing | Mar 27, 2024 | — |
| EFFECT | Filing | Dec 22, 2023 | — |
| CORRESP | Letter to the SEC | Dec 21, 2023 | — |
| CORRESP | Letter to the SEC | Dec 20, 2023 | — |
| UPLOAD | Letter from the SEC | Dec 6, 2023 | — |
| CORRESP | Letter to the SEC | Dec 1, 2023 | — |
| UPLOAD | Letter from the SEC | Nov 17, 2023 | — |
| 425 | Filing | Oct 25, 2023 | — |
| EFFECT | Filing | Sep 29, 2023 | — |
| CORRESP | Letter to the SEC | Sep 28, 2023 | — |
| 425 | Filing | Sep 27, 2023 | — |
| CORRESP | Letter to the SEC | Sep 20, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 15, 2023 | — |
| CORRESP | Letter to the SEC | Aug 31, 2023 | — |
| UPLOAD | Letter from the SEC | Aug 24, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| 425 | Filing | Jul 14, 2023 | — |
| EFFECT | Filing | Nov 24, 2020 | — |
| CORRESP | Letter to the SEC | Nov 20, 2020 | — |
| UPLOAD | Letter from the SEC | Nov 19, 2020 | — |
| EFFECT | Filing | Sep 3, 2020 | — |
| CORRESP | Letter to the SEC | Sep 1, 2020 | — |
| UPLOAD | Letter from the SEC | Sep 1, 2020 | — |
| D | Filing | Jul 27, 2020 | — |
| EFFECT | Filing | Oct 2, 2019 | — |
| CORRESP | Letter to the SEC | Sep 30, 2019 | — |
| CORRESP | Letter to the SEC | Sep 30, 2019 | — |
| CERT | 8a cert | Sep 30, 2019 | — |
| 8-A12B | Filing | Sep 23, 2019 | — |
| CORRESP | Letter to the SEC | Sep 13, 2019 | — |
| SEC STAFF LETTER | Filing | Sep 11, 2019 | — |
| CORRESP | Letter to the SEC | Sep 6, 2019 | — |
| UPLOAD | Letter from the SEC | Sep 4, 2019 | — |
| SEC STAFF LETTER | Filing | Sep 3, 2019 | — |
| DRSLTR | Filing | Aug 22, 2019 | — |
| DRS/A | Filing | Aug 22, 2019 | — |
| UPLOAD | Letter from the SEC | Aug 13, 2019 | — |
| D | Filing | Jul 23, 2019 | — |
| DRS | Filing | Jul 19, 2019 | — |
| D | Filing | Apr 14, 2017 | — |
Showing 53 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
- 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)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.