Korro Bio, Inc. (KRRO) Insider Trading

Over the last 3 months, KRRO insiders made 0 open-market buys and 15 sales, a net sale of -$2.9M (SEC Form 4). Over the last 6 months, 57 institutions increased and 42 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
15
Net (3m)
-$2.9M
Insider trades by month Buys Sells
Apr
Oct
Nov
Mar
Apr
Jun
Context3-month price +16.4%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell3,382$13.95
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell114$14.98
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell6,979$14.60
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell666$14.98
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell40,679$14.60
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell17,426$14.25
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell101,579$14.25
Jun 24, 2026FORMELA JEAN FRANCOISdirectorSell580$13.95
Jun 17, 2026Chappell Toddofficer: Chief Operating OfficerSell3,168$10.83
Jun 17, 2026Dolan Oliverofficer: Senior Vice President, FinanceSell3,383$10.83
Jun 17, 2026Cerio Jeffreyofficer: General CounselSell6,609$10.83
Jun 17, 2026Vincent Loic Aofficer: Chief Scientific OfficerSell3,418$10.83
Jun 11, 2026FORMELA JEAN FRANCOISdirectorGrant14,677$10.59
Jun 11, 2026Bermingham NessandirectorGrant14,677$10.59
Jun 11, 2026Knobil KatharinedirectorGrant14,677$10.59
Jun 11, 2026Meyers RacheldirectorGrant14,677$10.59
Jun 11, 2026PEARSON TIMOTHY RdirectorGrant14,677$10.59
Jun 11, 2026Behbahani AlidirectorGrant14,677$10.59
Jun 2, 2026Aiyar Ramdirector, officer: President and CEOSell15,152$12.98
Jun 1, 2026FORMELA JEAN FRANCOISdirectorSell2,441$13.95
Jun 1, 2026FORMELA JEAN FRANCOISdirectorSell419$13.95
May 28, 2026Aiyar Ramdirector, officer: President and CEOGrant50,000$12.33
Apr 2, 2026Lynx1 Capital Management LP10 percent ownerBuy520$10.60
Mar 12, 2026Chang Carmen10 percent ownerBuy207,100$11.11
Mar 12, 2026New Enterprise Associates 17, L.P.10 percent ownerBuy207,100$11.11
Mar 12, 2026SANDELL SCOTT D10 percent ownerBuy242,945$0.00
Mar 12, 2026SANDELL SCOTT D10 percent ownerBuy207,100$11.11
Mar 12, 2026Yang Rick10 percent ownerBuy242,945$0.00
Mar 12, 2026Yang Rick10 percent ownerBuy207,100$11.11
Mar 12, 2026Makhzoumi Mohamad10 percent ownerBuy242,945$0.00

Source: KRRO SEC Form 4 filings, latest Jun 24, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their KRRO positions over the last 6 months (SEC Form 13F).

Increased
57
New positions
58
Reduced
42
Sold out
43
Largest moves
InstitutionActionSharesFiled
LYNX1 CAPITAL MANAGEMENT LPIncreased1.5MMay 4, 2026
NEA MANAGEMENT COMPANY, LLCIncreased1.3MMay 15, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLCUnchanged1.1MMay 14, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLCUnchanged1.1MFeb 13, 2026
NEA MANAGEMENT COMPANY, LLCUnchanged1.1MFeb 17, 2026
BALYASNY ASSET MANAGEMENT L.P.New Position1.0MMay 15, 2026
VR ADVISER, LLCNew Position1.0MMay 15, 2026
AFFINITY ASSET ADVISORS, LLCNew Position707KMay 14, 2026
LYNX1 CAPITAL MANAGEMENT LPNew Position678KFeb 17, 2026
NANTAHALA CAPITAL MANAGEMENT, LLCIncreased660KMay 15, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position622KMay 15, 2026
NANTAHALA CAPITAL MANAGEMENT, LLCNew Position600KFeb 13, 2026
ADAR1 CAPITAL MANAGEMENT, LLCNew Position540KMay 18, 2026
VANGUARD GROUP INCIncreased490KJan 29, 2026
BLACKROCK, INC.Increased460KMay 13, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.

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