Greedy Insider
Korro Bio, Inc. (KRRO) Insider Trades and Scores
Korro Bio, Inc. (KRRO) insider trades: since Mar 10, 2026, Greedy Insider recorded 24 open-market buys and 33 sales on Form 4 from 17 insiders. The strongest recent filing scored 83 (Strong).
Who bought and who sold
Across the last 57 scoreable Form 4 transactions in KRRO, 24 were open-market purchases and 33 were sales. The table lists the most recent filings with each one's Greediness Score, so the structurally unusual trades are easy to spot first.
| Insider | Role | Type | Shares | Date | Score | ||
|---|---|---|---|---|---|---|---|
| FORMELA JEAN FRANCOIS | Director | Sell | 31888.0 | 450258.56 | 2026-09-14 | 68 | View |
| FORMELA JEAN FRANCOIS | Director | Sell | 6602.0 | 93220.24 | 2026-09-14 | 56 | View |
| Dolan Oliver | President | Sell | 5.0 | 68.58 | 2026-09-11 | 61 | View |
| FORMELA JEAN FRANCOIS | Director | Sell | 8450.0 | 118215.5 | 2026-09-11 | 56 | View |
| FORMELA JEAN FRANCOIS | Director | Sell | 1750.0 | 24482.5 | 2026-09-11 | 51 | View |
| Dolan Oliver | President | Sell | 6.0 | 81.6198 | 2026-09-09 | 62 | View |
| Dolan Oliver | President | Sell | 7347.0 | 99285.89 | 2026-09-08 | 79 | View |
| FORMELA JEAN FRANCOIS | Director | Sell | 249.0 | 3476.04 | 2026-08-26 | 52 | View |
| FORMELA JEAN FRANCOIS | Director | Sell | 51.0 | 711.96 | 2026-08-26 | 52 | View |
| FORMELA JEAN FRANCOIS | Director | Sell | 23584.0 | 330176.0 | 2026-08-19 | 65 | View |
The strongest recent filing
Dolan Oliver (President) sold 3,383 shares of Korro Bio, Inc. on Jun 16, 2026, a filing that scored 83 (Strong). It scored Strong because a senior insider was trading and it was direct personal ownership. The score describes the filing, not future returns. This is not investment advice.
Cluster activity
A cluster buy is present: 5 insiders (FORMELA JEAN FRANCOIS, Chappell Todd, Dolan Oliver, Vincent Loic A) traded KRRO the same direction within a 7-day window. Shared conviction is a stronger structural signal than a lone trade.
How this compares with Korro Bio, Inc.'s own history
Open-market buys make up 42% of the 57 scoreable KRRO transactions on record between Mar 10, 2026 and Sep 14, 2026. Comparing a filing with the company's own buy/sell mix is how you tell a routine disposal from an unusual accumulation.
Methodology and sources
Scores come from six published, user-adjustable factors (insider role, cluster activity, trade size versus the insider's own history, position impact, filing urgency, and direct versus indirect ownership). The score describes the filing, not future returns. This is not investment advice.
Key facts
- Scoreable Form 4 transactions on record: 57
- Open-market buys: 24
- Sales: 33
- Distinct insiders: 17
- Strongest recent Greediness Score: 83 (Strong)
Primary sources
Related
- Strongest filing
- KRRO in the live feed
- How the Greediness Score works
- What is a cluster buy?
- Form 4 transaction codes
The score describes the filing, not future returns. This is not investment advice.