13F

Stock

Korro Bio, Inc.

KRRO · held by 83 managers

Reported value

$60.1M

Holders

83

+0 new · −1 exited

Holders’ est. mark

−$2.97M

Price effect on 4 books still in the name

Largest holder

$9.11M

Atlas Venture Life Science Advisors, LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
Atlas Venture Life Science Advisors, LLC1.14M$9.11MHeld
NEA Management Company, LLC1.09M$8.74MHeld
Lynx1 Capital Management LP677.9K$5.43MHeld
Nantahala Capital Management, LLC600K$4.81MHeld
Vanguard489.6K$3.92MHeld
BlackRock, Inc.457.4K$3.66MHeld
TCG Crossover Management, LLC416.3K$3.33MHeld
Siren, L.L.C.347.7K$2.79MHeld
JANE STREET GROUP, LLC288.5K$2.31MHeld
72 Investment Holdings, LLC276.8K$2.22MHeld
SUSQUEHANNA INTERNATIONAL GROUP, LLP196.8K$1.58MHeld
GEODE CAPITAL MANAGEMENT, LLC162.8K$1.3MHeld
MILLENNIUM MANAGEMENT LLC161.1K$1.29MHeld
State Street146.2K$1.17MHeld
TWO SIGMA INVESTMENTS, LP79K$632.7KHeld
Renaissance Technologies74.9K$599.9KHeld
MORGAN STANLEY69.7K$558.5K−$2.78MCut−$7.46M
EMERALD MUTUAL FUND ADVISERS TRUST65.5K$525KHeld
F/m Investments LLC65.5K$525KHeld
Citadel58.3K$467.2KHeld
XTX Topco Ltd57.1K$457.1KHeld
NORTHERN TRUST CORP55.6K$445.7KHeld
GOLDMAN SACHS GROUP INC52K$416.1KHeld
Graham Capital Management, L.P.40.8K$326.5KHeld
Icahn Capital40.6K$325.6KHeld
Fidelity37.9K$303.2KHeld
AIHC Capital Management Ltd30.3K$242.4KHeld
SIMPLEX TRADING, LLC28.2K$226.3KHeld
Quantinno Capital Management LP27.6K$221.1KHeld
Quadrature Capital Ltd27.1K$216.8KHeld
Engineers Gate Manager LP26.9K$215.3KHeld
RAYMOND JAMES FINANCIAL INC23K$184.5KHeld
UBS Group AG20K$160.2KHeld
MARSHALL WACE, LLP19.8K$158.4KHeld
Bank of New York Mellon Corp18.9K$151KHeld
CHARLES SCHWAB INVESTMENT MANAGEMENT INC16.3K$130.8KHeld
DEUTSCHE BANK AG\12.8K$102.2KHeld
TWO SIGMA ADVISERS, LP11.2K$90KHeld
AMERICAN CENTURY COMPANIES INC10.6K$84.8KHeld
Jain Global LLC10.6K$84.7KHeld
GUGGENHEIM CAPITAL LLC10.4K$83.6KHeld
RHUMBLINE ADVISERS10.3K$82.1KHeld
AlphaQuest LLC7.7K$61.7KHeld
WELLS FARGO & COMPANY/MN7.52K$60.3KHeld
BANK OF AMERICA CORP /DE/5.9K$47.2K−$187.6KCut−$178K
GROUP ONE TRADING LLC4K$32KHeld
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.3.15K$25.2KHeld
NEW YORK STATE COMMON RETIREMENT FUND3K$24KHeld
JPMORGAN CHASE & CO2.84K$22.7KHeld
Russell Investments Group, Ltd.1.93K$15.5KHeld
North Star Investment Management Corp.1.8K$14.4KHeld
Steward Partners Investment Advisory, LLC1.5K$12KHeld
BNP PARIBAS FINANCIAL MARKETS1.49K$11.9KHeld
OSAIC HOLDINGS, INC.1.42K$11.3KHeld
Tower Research Capital LLC (TRC)1.39K$11.1KHeld
Police & Firemen's Retirement System of New Jersey1.37K$11KHeld
TD Waterhouse Canada Inc.800$6.4KHeld
PNC Financial Services Group, Inc.740$5.93KHeld
CITIGROUP INC607$4.86KHeld
Ameritas Investment Partners, Inc.598$4.79KHeld
Legal & General Group Plc526$4.21KHeld
LOS ANGELES CAPITAL MANAGEMENT LLC110$4.01KHeld
Sterling Capital Management LLC458$3.67KHeld
DUNCKER STREETT & CO INC437$3.5KHeld
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM408$3.27KHeld
FEDERATED HERMES, INC.302$2.42KHeld
ROYAL BANK OF CANADA224$2KHeld
Optiver Holding B.V.116$929Held
GAMMA Investing LLC102$817Held
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC91$729Held
Keating Financial Advisory Services, Inc.63$505Held
IFP Advisors, Inc40$320−$1.6KCut−$1.6K
Global Retirement Partners, LLC35$280Held
ACADIAN ASSET MANAGEMENT LLC33.8K$270Held
ALGERT GLOBAL LLC27.1K$217Held
ROTHSCHILD INVESTMENT LLC6$48Held
MAI Capital Management5$41Held
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO2$16Held
Allworth Financial LP1$9−$39Cut−$4.4K
Sunbelt Securities, Inc.1$8Held
SBI Securities Co., Ltd.1$8Held
CWM, LLC288$2Held
AMALGAMATED BANK208$2Held

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.