Korro Bio, Inc. (KRRO)
Data as of , from SEC Form 4 filings.
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About Korro Bio, Inc. (KRRO)
Korro Bio Inc is a biopharmaceutical company with a mission to discover, develop, and commercialize a new class of genetic medicines based on editing RNA, enabling the treatment of both rare and highly prevalent diseases. It is generating a portfolio of differentiated programs that are designed to harness the body's natural RNA editing process to effect a precise yet transient single base edit. By editing RNA instead of DNA, Korro Bio is expanding the reach of genetic medicines by delivering additional precision and tunability. The company operates and manages its business as one reportable segment and one operating segment, which is the business of discovering, developing and commercializing therapies derived from or incorporating its RNA-editing technology.
- CAMBRIDGE, MA
- 57
- 2023
- XNAS
KRRO Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market purchase | 2 | 6,684 | $79K |
| Open-market sale | 14 | 92,761 | $1.28M |
| Grant or award | 4 | 27,000 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
KRRO insider transactions (Form 4)
4550 Form 4 filings on record, the earliest from Oct 18, 2024, newest first. Filing history page 2 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| New Enterprise Associates 17, L.P. | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
| New Enterprise Associates 17, L.P. | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
 Carmen Chang | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
| Carmen Chang | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
 Ali Behbahani | Grant or award | Common Stock | 207,100 | $11.11 | $2.30M | |
| Ali Behbahani | Grant or award | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
| Forest Baskett | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
| Forest Baskett | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
| Edward T. Mathers | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
| Edward T. Mathers | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
| Mohamad Makhzoumi | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
| Mohamad Makhzoumi | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
 Paul Edward Walker | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
| Paul Edward Walker | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
| Anthony A. Florence Jr. | Open-market purchase | Common Stock | 207,100 | $11.11 | $2.30M | |
| Anthony A. Florence Jr. | Open-market purchase | Pre-Funded Warrants | 242,945 | $11.11 | $2.70M | |
| Ram Aiyar - Officer | Grant or award | Common Stock | 40,000 footnote F1 | $0.00 | - | |
| Ram Aiyar - Officer | Grant or award | Stock Option (Right to Buy) | 80,000 | $0.00 | - | |
| ||||||
| Loic A. Vincent - Officer | Grant or award | Stock Option (Right to Buy) | 35,000 | $0.00 | - | |
| Oliver Dolan - Officer | Grant or award | Stock Option (Right to Buy) | 15,000 | $0.00 | - | |
| Jeffrey Cerio - Officer | Grant or award | Stock Option (Right to Buy) | 23,000 | $0.00 | - | |
| Todd Chappell - Officer | Grant or award | Stock Option (Right to Buy) | 38,000 | $0.00 | - | |
| Todd Chappell - Officer | Grant or award | Common Stock | 20,132 | $0.00 | - | |
| Loic A. Vincent - Officer | Grant or award | Common Stock | 21,715 | $0.00 | - | |
| Jeffrey Cerio - Officer | Grant or award | Common Stock | 41,902 | $0.00 | - | |
| Oliver Dolan - Officer | Grant or award | Common Stock | 21,482 | $0.00 | - | |
| Jean Francois Formela | Grant or award | Stock Option (Right to Buy) | 6,010 | $0.00 | - | |
| Vineet Agarwal - Officer | Option exercise | Common Stock | 800 | $11.68 | $9K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 800 | $70.00 | $56K | |
| Vineet Agarwal - Officer | Option exercise | Stock Option (Right to Buy) | 800 | $0.00 | - | |
| Vineet Agarwal - Officer | Option exercise | Common Stock | 9,263 | $11.68 | $108K | |
| Vineet Agarwal - Officer | Option exercise | Common Stock | 953 | $14.98 | $14K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 2,023 | $71.51 | $145K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 164 | $73.71 | $12K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 115 | $74.56 | $9K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 56 | $76.00 | $4K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 23 | $77.00 | $2K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 260 | $77.55 | $20K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 457 | $78.59 | $36K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 1,815 | $79.79 | $145K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 4,961 | $80.50 | $399K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 317 | $81.48 | $26K | |
| Vineet Agarwal - Officer | Open-market sale | Common Stock | 25 | $82.89 | $2K | |
| Vineet Agarwal - Officer | Option exercise | Stock Option (Right to Buy) | 9,263 | $0.00 | - | |
| Vineet Agarwal - Officer | Option exercise | Stock Option (Right to Buy) | 953 | $0.00 | - | |
Recent KRRO Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Atlas Venture Opportunity Fund II, L.P. | Shareholder | 6,602 | $91K | View on EDGAR | |
| Atlas Venture Fund XI, L.P. | Shareholder | 31,888 |
KRRO insider trading FAQ
What is the latest insider trade for KRRO?
Korro Bio, Inc. (KRRO) had 12 insider filings in the last 90 days, with the most recent on 2026-09-15. The full record for KRRO runs to 50 Form 4 filings, the earliest from 2024-10-18. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying KRRO stock?
2 insider purchases of KRRO were filed in the last 90 days, totaling $79K.
How many insiders are selling KRRO stock?
14 insider sales of KRRO were filed in the last 90 days, totaling $1.28M.
Where can I see KRRO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects KRRO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Jean Francois Formela view on EDGAR
- - Oliver Dolan view on EDGAR
- - Oliver Dolan view on EDGAR
- - Jean Francois Formela view on EDGAR
- - Jean Francois Formela view on EDGAR
- - Jean Francois Formela view on EDGAR
- - Lynx1 Capital Management LP view on EDGAR
- - Ram Aiyar view on EDGAR
- - Loic A. Vincent view on EDGAR
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Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where KRRO's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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