KRRO Korro Bio, Inc.
Korro Bio, Inc. (KRRO) Insider Activity
What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.
How much of that selling was preplanned? 100% planned / 0% discretionary
Largest single sale: $450.3K.
Where they traded
Last open-market purchase: August 10, 2026 .
Recent open-market activity
| Date | Insider | Role | Action | Shares | Price | Value | Held after |
|---|---|---|---|---|---|---|---|
| FORMELA JEAN FRANCOIS 2 fills | Director | Sell 10b5-1 | 38,490 | $14.12 | $543.5K | 640,610 −5.7% of holding | |
| FORMELA JEAN FRANCOIS 2 fills | Director | Sell 10b5-1 | 10,200 | $13.99 | $142.7K | 672,498 −1.5% of holding | |
| Dolan Oliver | Senior Vice President, Finance | Sell 10b5-1 | 5 | $13.72 | $69 | 16,241 −0% of holding | |
| Dolan Oliver | Senior Vice President, Finance | Sell 10b5-1 | 6 | $13.60 | $82 | 16,246 −0% of holding | |
| Dolan Oliver | Senior Vice President, Finance | Sell 10b5-1 | 7,347 | $13.51 | $99.3K | 16,252 −31.1% of holding |
Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.