KRRO — Korro Bio, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2019-10-03.
Performance
Technicals
Others in Healthcare
Measured signals that fired on KRRO
| date | signal | measured base rate |
|---|---|---|
| 2026-06-17 | Cluster sale: three or more insiders insider | -0.37% over 21 days · t = -3.38 · n = 21,542 statistically distinguishable from its control group |
| 2026-04-06 | Equal highs taken out structure | -0.70% over 21 days · t = -8.28 · n = 68,636 statistically distinguishable from its control group |
| 2026-03-12 | Cluster buy: three or more insiders insider | +0.63% over 21 days · t = 1.84 · n = 3,050 not distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-08-19 | FORMELA JEAN FRANCOIS Director | Open-market sale 10b5-1 plan | 23.6K | 14.00 | 330.2K |
| 2026-08-19 | FORMELA JEAN FRANCOIS Director | Open-market sale 10b5-1 plan | 4.9K | 14.00 | 68.4K |
| 2026-08-11 | FORMELA JEAN FRANCOIS Director | Open-market sale 10b5-1 plan | 1.8K | 13.96 | 24.8K |
| 2026-08-11 | FORMELA JEAN FRANCOIS Director | Open-market sale 10b5-1 plan | 368 | 13.96 | 5.1K |
| 2026-08-10 | Nichols Weston 10% owner | Open-market purchase | 1.5K | 13.19 | 19.3K |
| 2026-08-10 | Lynx1 Capital Management LP 10% owner | Open-market purchase | 1.5K | 13.19 | 19.3K |
| 2026-08-06 | Lynx1 Capital Management LP 10% owner | Open-market purchase | 5.2K | 11.40 | 59.5K |
| 2026-08-06 | Nichols Weston 10% owner | Open-market purchase | 5.2K | 11.40 | 59.5K |
| 2026-08-04 | Aiyar Ram President and CEO | Open-market sale | 5.8K | 10.84 | 62.9K |
| 2026-07-15 | Cerio Jeffrey General Counsel | Grant or award | 6.5K | 0.00 | 0 |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| Lynx1 Capital Management LP | 17.4M | 1.5M |
| NEA Management Company, LLC | 14.7M | 1.3M |
| Atlas Venture Life Science Advisors, LLC | 12.9M | 1.1M |
| Balyasny Asset Management L.P. | 11.8M | 1.0M |
| Venrock Adviser, LLC | 11.4M | 1.0M |
| Affinity Asset Advisors, LLC | 8.0M | 706.9K |
| Nantahala Capital Management, LLC | 7.5M | 660.0K |
| ADAR1 Capital Management, LLC | 6.1M | 540.1K |
| BlackRock, Inc. | 5.2M | 460.0K |
| Driehaus Capital Management LLC | 5.1M | 450.0K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
- Korro Bio, Inc. (KRRO) filed form 8-K · 2026-08-19 · SEC EDGAR
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