Korro Bio, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Korro Bio, Inc. (KRRO), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are KRRO insiders buying or selling?
In the last 12 months, Korro Bio, Inc. insiders reported 11 open-market purchases ($20.8M) and 15 sales ($5.7M) — net buying of $15.1M. Since October 2019, Trabud has recorded 161 Form 4 filings for KRRO: 26 buys ($36.1M) and 135 sells ($25.2M).
Source: SEC EDGAR Form 4
Key Statistics (October 2019 – Sep 15, 2026)
Total Form 4 filings
161
SEC EDGAR
Insider filers
28
Insider buys (26)
$36.1M
Insider sells (135)
$25.2M
Insider sentiment
Net buyingNet insider flow of $10.9M in net buying since October 2019, and $15.1M in net buying over the last 12 months. 1 insider buy in the last 90 days.
Recent KRRO insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 15, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 48.7K | $14.09 | $686.2K | SEC ↗ |
| Sep 14, 2026 | Oliver Dolan | Senior Vice President, Finance | Sale | 5 | $13.72 | $68.58 | SEC ↗ |
| Sep 10, 2026 | Oliver Dolan | Senior Vice President, Finance | Sale | 7.4K | $13.51 | $99.4K | SEC ↗ |
| Aug 28, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 300 | $13.96 | $4.2K | SEC ↗ |
| Aug 21, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 28.5K | $14.00 | $398.6K | SEC ↗ |
| Aug 13, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 2.1K | $13.96 | $29.9K | SEC ↗ |
| Aug 13, 2026 | Lynx1 Capital Management LP | 10% Owner | Purchase | 6.7K | $11.79 | $78.8K | SEC ↗ |
| Aug 5, 2026 | Ram Aiyar | President and CEO | Sale | 5.8K | $10.84 | $62.9K | SEC ↗ |
| Jul 7, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 110.0K | $14.02 | $1.5M | SEC ↗ |
| Jun 25, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 171.4K | $14.34 | $2.5M | SEC ↗ |
| Jun 17, 2026 | Todd Chappell | Chief Operating Officer | Sale | 3.2K | $10.83 | $34.3K | SEC ↗ |
| Jun 17, 2026 | Loic A Vincent | Chief Scientific Officer | Sale | 3.4K | $10.83 | $37.0K | SEC ↗ |
| Jun 17, 2026 | Jeffrey Cerio | General Counsel | Sale | 6.6K | $10.83 | $71.6K | SEC ↗ |
| Jun 17, 2026 | Oliver Dolan | Senior Vice President, Finance | Sale | 3.4K | $10.83 | $36.6K | SEC ↗ |
| Jun 2, 2026 | Ram Aiyar | President and CEO | Sale | 15.2K | $12.98 | $196.7K | SEC ↗ |
| Jun 1, 2026 | FORMELA JEAN FRANCOIS | Director | Sale | 2.9K | $13.95 | $39.9K | SEC ↗ |
| Apr 2, 2026 | Lynx1 Capital Management LP | 10% Owner | Purchase | 520 | $10.60 | $5.5K | SEC ↗ |
| Mar 13, 2026 | Rick Yang | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | Scott D Sandell | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | New Enterprise Associates 17, L.P. | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | Carmen Chang | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | Forest Baskett | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | Edward T Mathers | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | Mohamad Makhzoumi | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
| Mar 13, 2026 | Paul Edward Walker | 10% Owner | Purchase | 207.1K | $11.11 | $2.3M | SEC ↗ |
Showing the 25 most recent of 161 Form 4 filings for Korro Bio, Inc..
Most active KRRO insiders
- Lucchino David L.47 filings
- Christopher R. Loose34 filings
- Richard J. Mitrano20 filings
- FORMELA JEAN FRANCOIS7 filings
- Quentin Mccubbin5 filings
Ask anything about KRRO insider activity
Use Trabud's AI agent to query Korro Bio, Inc.'s Form 4 history in plain English — "Show me KRRO CEO purchases this year" or compare it against any other ticker.
Open the AI agentKRRO insider trading FAQ
Are Korro Bio, Inc. insiders buying or selling?
In the last 12 months, Korro Bio, Inc. insiders reported 11 open-market purchases ($20.8M) and 15 sales ($5.7M) — net buying of $15.1M. Since October 2019, Trabud has recorded 161 Form 4 filings for KRRO: 26 buys ($36.1M) and 135 sells ($25.2M). Over the full record that is net buying of $10.9M.
How many insiders trade KRRO stock?
28 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Korro Bio, Inc.. The most recent filing was accepted on Sep 15, 2026.
Where does Trabud get KRRO insider trading data?
All KRRO insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.