Q32 BIO INC.

PublicCIK: 1661998
FIXXCBOEQTTBNASDAQ
Location

WALTHAM, MA

13F Filings

Institutional Holders

Q32 BIO INC.FIXX— Latest position per institution from SEC 13F filings

15

Institutional holders

22.67M

Total shares held

290.40M

Estimated value

1.13M

Avg. position size

1

ORBIMED ADVISORS LLC

CIK 1055951

Shares

4.13M

Value

52.59M

Filed

Jun 30, 2026

2

BOXER CAPITAL MANAGEMENT, LLC

CIK 2018299

Shares

3.15M

Value

40.12M

Filed

Jun 30, 2026

3

ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC

CIK 1917529

Shares

2.72M

Value

34.62M

Filed

Jun 30, 2026

4

BVF INC/IL

CIK 1056807

Shares

2.35M

Value

29.94M

Filed

Jun 30, 2026

5

RA CAPITAL MANAGEMENT, L.P.

CIK 1346824

Shares

2.33M

Value

29.72M

Filed

Jun 30, 2026

6

POINT72 ASSET MANAGEMENT, L.P.

CIK 1603466

Shares

1.17M

Value

14.95M

Filed

Jun 30, 2026

7

OPALEYE MANAGEMENT INC.

CIK 1595855

Shares

931K

Value

11.86M

Filed

Jun 30, 2026

8

LOGOS GLOBAL MANAGEMENT LP

CIK 1792126

Shares

800K

Value

10.19M

Filed

Jun 30, 2026

9

SUMMITTX CAPITAL, L.P.

CIK 2052310

Shares

733.77K

Value

9.35M

Filed

Jun 30, 2026

10

SIO CAPITAL MANAGEMENT, LLC

CIK 1482416

Shares

697.41K

Value

2.40M

Filed

Dec 31, 2024

11

IKARIAN CAPITAL, LLC

CIK 1778253

Shares

630K

Value

8.03M

Filed

Jun 30, 2026

12

VANGUARD CAPITAL MANAGEMENT LLC

CIK 2100119

Shares

518.80K

Value

6.61M

Filed

Jun 30, 2026

13

ADAGE CAPITAL PARTNERS GP, L.L.C.

CIK 1165408

Shares

404.41K

Value

18.04M

Filed

Sep 30, 2024

14

BLACKROCK FINANCE, INC.

CIK 1364742

Shares

342.27K

Value

6.14M

Filed

Jun 30, 2024

15

VANGUARD GROUP INC

CIK 102909

Shares

321.05K

Value

1.07M

Filed

Dec 31, 2025

16

ARCH VENTURE MANAGEMENT, LLC

CIK 1274403

Shares

320.48K

Value

2.06M

Filed

Mar 31, 2026

17

TEMASEK HOLDINGS (PRIVATE) LTD

CIK 1021944

Shares

313.94K

Value

1.08M

Filed

Dec 31, 2024

18

WOODLINE PARTNERS LP

CIK 1784547

Shares

286.21K

Value

3.65M

Filed

Jun 30, 2026

19

AMERICAN CENTURY COMPANIES INC

CIK 748054

Shares

272.75K

Value

3.47M

Filed

Jun 30, 2026

20

5AM VENTURE MANAGEMENT, LLC

CIK 1799883

Shares

251.99K

Value

4.52M

Filed

Jun 30, 2024

Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.