KRRO
insider transactionsKorro Bio, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 9 different insiders made open-market purchases in the last 365 days, totalling $70.0M.
Net shares · 365d
+5.4M
5.5M buy · 34.6K sell
Net value · 365d
$69.6M
$70.0M in · $416.1K out
Sentiment · 365d
Net buying
99% buying · 1% selling
Open-market trades · 365d
26
5.5M buy · 34.6K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Sell·S
Chief Scientific Officer
$37.0K
3.4K sh · $10.83
Own -16%
-
Sell·S
Oliver Dolan KEY
Senior Vice President, Finance
$36.6K
3.4K sh · $10.83
Own -16%
-
Sell·S
Chief Operating Officer
$34.3K
3.2K sh · $10.83
Own -16%
-
Sell·S
General Counsel
$71.6K
6.6K sh · $10.83
Own -16%
-
Grant·A
Director
$0
14.7K sh
Own New
-
Grant·A
Director
$0
14.7K sh
Own New
-
Grant·A
Director
$0
14.7K sh
Own New
-
Grant·A
Director
$0
14.7K sh
Own New
-
Grant·A
Director
$0
14.7K sh
Own New
-
Sell·S
Ram Aiyar KEY
President and CEO
$196.7K
15.2K sh · $12.98
Own -17%
-
Sell·S
Director · 10b5-1
$5.8K
419 sh · $13.95
Own -0%
-
Sell·S
Director · 10b5-1
$34.1K
2.4K sh · $13.95
Own -0%
-
Grant·A
Ram Aiyar KEY
President and CEO
$616.5K
50.0K sh · $12.33
Own +125%
-
Buy·P
$5.5K
520 sh · $10.60
Own +0%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Buy·P
10% Owner
$2.7M
242.9K sh · $11.11
Own New
-
Buy·P
10% Owner
$2.3M
207.1K sh · $11.11
Own +19%
-
Exercise·C
10% Owner
—
402.3K sh
Own New
-
Exercise·C
10% Owner
—
955.0K sh
Own New
-
Exercise·C
10% Owner
—
738.0K sh
Own New
-
Exercise·C
10% Owner
—
1.4M sh
Own New
-
Exercise·C
10% Owner
—
1.6M sh
Own New
-
Exercise·C
10% Owner
—
402.3K sh
Own +42%
-
Exercise·C
10% Owner
—
955.0K sh
Own New
-
Buy·P
10% Owner
$15.0M
937.5K sh · $16.00
Own +18%
-
Exercise·C
10% Owner
—
738.0K sh
Own +17%
-
Exercise·C
10% Owner
—
1.4M sh
Own +85%
-
Exercise·C
10% Owner
—
1.6M sh
Own New
-
Exercise·C
10% Owner
—
402.3K sh
Own New
-
Exercise·C
10% Owner
—
955.0K sh
Own New
-
Exercise·C
10% Owner
—
738.0K sh
Own New
-
Exercise·C
10% Owner
—
1.4M sh
Own New
-
Exercise·C
10% Owner
—
1.6M sh
Own New
-
Exercise·C
10% Owner
—
402.3K sh
Own +42%
-
Exercise·C
10% Owner
—
955.0K sh
Own New
-
Buy·P
10% Owner
$15.0M
937.5K sh · $16.00
Own +18%
-
Exercise·C
10% Owner
—
738.0K sh
Own +17%
-
Exercise·C
10% Owner
—
1.4M sh
Own +85%
-
Exercise·C
10% Owner
—
1.6M sh
Own New
-
Grant·A
Chief Scientific Officer
$0
35.0K sh
Own New
-
Grant·A
Oliver Dolan KEY
Senior Vice President, Finance
$0
15.0K sh
Own New
-
Grant·A
Chief Operating Officer
$0
38.0K sh
Own New
-
Grant·A
General Counsel
$0
23.0K sh
Own New
-
Grant·A
Ram Aiyar KEY
President and CEO
$0
80.0K sh
Own New
-
Grant·A
Ram Aiyar KEY
President and CEO
$0
40.0K sh
Own New
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 16, 2026 | Loic A Vincent | Sell S | 3.4K | $37.0K |
| Jun 16, 2026 | Oliver Dolan KEY | Sell S | 3.4K | $36.6K |
| Jun 16, 2026 | Todd Chappell | Sell S | 3.2K | $34.3K |
| Jun 16, 2026 | Jeffrey Cerio | Sell S | 6.6K | $71.6K |
| Jun 10, 2026 | Rachel Meyers | Grant A | 14.7K | $0 |
| Jun 10, 2026 | Timothy R Pearson | Grant A | 14.7K | $0 |
| Jun 10, 2026 | Katharine Knobil | Grant A | 14.7K | $0 |
| Jun 10, 2026 | FORMELA JEAN FRANCOIS | Grant A | 14.7K | $0 |
| Jun 10, 2026 | Nessan Bermingham | Grant A | 14.7K | $0 |
| May 29, 2026 | Ram Aiyar KEY | Sell S | 15.2K | $196.7K |
| May 28, 2026 | FORMELA JEAN FRANCOIS 10b5-1 | Sell S | 419 | $5.8K |
| May 28, 2026 | FORMELA JEAN FRANCOIS 10b5-1 | Sell S | 2.4K | $34.1K |
| May 26, 2026 | Ram Aiyar KEY | Grant A | 50.0K | $616.5K |
| Mar 31, 2026 | Lynx1 Capital Management LP / Weston Nichols | Buy P | 520 | $5.5K |
| Mar 10, 2026 | Rick Yang | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Rick Yang | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | Scott D Sandell | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Scott D Sandell | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | New Enterprise Associates 17, L.P. / NEA Partners 17, L.P. / NEA 17 GP, LLC | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | New Enterprise Associates 17, L.P. / NEA Partners 17, L.P. / NEA 17 GP, LLC | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | Edward T Mathers | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Edward T Mathers | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | Paul Edward Walker | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Paul Edward Walker | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | Mohamad Makhzoumi | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Mohamad Makhzoumi | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | Anthony A. Florence Jr. | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Anthony A. Florence Jr. | Buy P | 207.1K | $2.3M |
| Mar 10, 2026 | Forest Baskett | Buy P | 242.9K | $2.7M |
| Mar 10, 2026 | Forest Baskett | Buy P | 207.1K | $2.3M |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 402.3K | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 955.0K | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 738.0K | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 1.4M | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 1.6M | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 402.3K | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 955.0K | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Buy P | 937.5K | $15.0M |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 738.0K | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 1.4M | — |
| Feb 9, 2026 | Anthony A. Florence Jr. | Exercise C | 1.6M | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 402.3K | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 955.0K | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 738.0K | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 1.4M | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 1.6M | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 402.3K | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 955.0K | — |
| Feb 9, 2026 | Forest Baskett | Buy P | 937.5K | $15.0M |
| Feb 9, 2026 | Forest Baskett | Exercise C | 738.0K | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 1.4M | — |
| Feb 9, 2026 | Forest Baskett | Exercise C | 1.6M | — |
| Feb 2, 2026 | Loic A Vincent | Grant A | 35.0K | $0 |
| Feb 2, 2026 | Oliver Dolan KEY | Grant A | 15.0K | $0 |
| Feb 2, 2026 | Todd Chappell | Grant A | 38.0K | $0 |
| Feb 2, 2026 | Jeffrey Cerio | Grant A | 23.0K | $0 |
| Feb 2, 2026 | Ram Aiyar KEY | Grant A | 80.0K | $0 |
| Feb 2, 2026 | Ram Aiyar KEY | Grant A | 40.0K | $0 |
About KRRO insider trading
This page tracks insider transactions for Korro Bio, Inc. (KRRO) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.