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

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.