13F

Stock

Q32 Bio Inc.

QTTB · held by 53 managers

Reported value

$59.3M

Holders

53

+8 new · −8 exited

Holders’ est. mark

$22.2M

Price effect on 42 books still in the name

Largest holder

$14.5M

ORBIMED ADVISORS LLC

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
ORBIMED ADVISORS LLC2.25M$14.5M$6.98MAdded$6.98M
Atlas Venture Life Science Advisors, LLC2.09M$13.4M$6.49MAdded$6.49M
Opaleye Management Inc.1.26M$8.06M$661.4KAdded$7.36M
Carlyle Group Inc.1.1M$7.08M$3.46MAdded$3.46M
ARCH Venture Management, LLC320.5K$2.06M$993.5KAdded$993.5K
ACORN CAPITAL ADVISORS, LLC315.1K$2.02M$976.7KAdded$384.5K
VANGUARD CAPITAL MANAGEMENT LLC306.4K$1.97MHeld
MACKENZIE FINANCIAL CORP246.3K$1.58MNew
Sanofi244.1K$1.57M$756.7KAdded$756.7K
Renaissance Technologies206.9K$1.33M$308.8KAdded$997.7K
MONIMUS CAPITAL MANAGEMENT, LP134.3K$862.3KNew
GEODE CAPITAL MANAGEMENT, LLC118.2K$758.7K$329KAdded$406.3K
Pfizer Inc101.6K$736.7K$399.4KCut−$185.5K
BlackRock, Inc.86.1K$553.1K$185.8KAdded$354.1K
JANE STREET GROUP, LLC65.6K$421.1K$78.7KAdded$336.9K
MARSHALL WACE, LLP52.4K$336.7KNew
VANGUARD FIDUCIARY TRUST CO50K$321KHeld
TWO SIGMA INVESTMENTS, LP42.3K$271.9K$131.3KAdded$116.4K
State Street41.5K$266.5K$65.8KAdded$196K
ADAR1 Capital Management, LLC35K$224.7K$62KAdded$158.3K
Affinity Asset Advisors, LLC27.8K$178.3K$86.1KAdded$86.1K
NORTHERN TRUST CORP25K$160.7K$77.6KAdded$77.6K
Cetera Investment Advisers20.7K$132.9KNew
AMERICAN CENTURY COMPANIES INC18.8K$120.5KNew
Citadel15.5K$99.4K$48KCut−$52.4K
BRIDGEWAY CAPITAL MANAGEMENT, LLC12.6K$81KNew
MORGAN STANLEY9.56K$61.4K$17KAdded$43.2K
EverSource Wealth Advisors, LLC4.64K$29.8K$14.4KAdded$14.4K
Fidelity3.4K$21.8K$10.4KAdded$10.7K
ROYAL BANK OF CANADA2.74K$18K$542Added$17K
FEDERATED HERMES, INC.2.27K$14.6K$7.05KAdded$7.05K
Vanguard Global Advisers, LLC1.92K$12.3KHeld
Tower Research Capital LLC (TRC)1.87K$12K$3.03KAdded$8.77K
Arax Advisory Partners1.15K$7.37K$3.44KAdded$3.68K
Rockefeller Capital Management L.P.577$3.7K$1.79KAdded$1.79K
JONES FINANCIAL COMPANIES LLLP500$3.63K$1.97KAdded$1.97K
Russell Investments Group, Ltd.454$2.92K$1.41KAdded$1.41K
BNP PARIBAS FINANCIAL MARKETS303$1.95K$939Added$922
UBS Group AG270$1.73K$837Cut−$43.4K
ACADIAN ASSET MANAGEMENT LLC172.6K$1.11K$151Added$947
NISA INVESTMENT ADVISORS, LLC166$1.07K$515Added$515
OSAIC HOLDINGS, INC.124$796$385Added$359
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO111$713$93Added$613
SBI Securities Co., Ltd.104$668$323Added$147
Allworth Financial LP98$630$304Added$304
WELLS FARGO & COMPANY/MN84$539New
Federation des caisses Desjardins du Quebec70$446$215Added$215
CWM, LLC39$250$250Added$250
Cambridge Investment Research Advisors, Inc.35K$225New
GROUP ONE TRADING LLC34$218$105Added$105
HARBOUR INVESTMENTS, INC.11$71$34Added$34
AdvisorNet Financial, Inc2$13$6Added$6
DANSKE BANK A/S1$6$3Added$3

Who left

Positions as of Q1 2026. 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.