# Q32 BIO INC (QTTB)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/QTTB/

- Reporting holders: 73
- Reported value: $288.3M
- Shares held by institutions: 22,370,037 of 29,769,466 outstanding
- Held through calls: 0.0%
- Held through puts: 1.2%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [ORBIMED ADVISORS LLC](https://holderbook.com/funds/1055951-orbimed-advisors-llc/) | $52.6M | 4,127,987 | 1.0% | 10 |
| [Boxer Capital Management, LLC](https://holderbook.com/funds/2018299-boxer-capital-management-llc/) | $40.1M | 3,149,310 | 3.0% | 1 |
| [Atlas Venture Life Science Advisors, LLC](https://holderbook.com/funds/1917529-atlas-venture-life-science-advisors-llc/) | $34.6M | 2,717,106 | 3.9% | 10 |
| [BVF INC/IL](https://holderbook.com/funds/1056807-bvf-inc-il/) | $29.9M | 2,350,000 | 0.8% | 1 |
| [RA CAPITAL MANAGEMENT, L.P.](https://holderbook.com/funds/1346824-ra-capital-management-l-p/) | $29.7M | 2,332,457 | 0.3% | 1 |
| [Point72 Asset Management, L.P.](https://holderbook.com/funds/1603466-point72-asset-management-l-p/) | $14.9M | 1,173,396 | 0.0% | 1 |
| [Opaleye Management Inc.](https://holderbook.com/funds/1595855-opaleye-management-inc/) | $11.9M | 931,000 | 1.1% | 3 |
| [Logos Global Management LP](https://holderbook.com/funds/1792126-logos-global-management-lp/) | $10.2M | 800,000 | 0.4% | 1 |
| [SummitTX Capital, L.P.](https://holderbook.com/funds/2052310-summittx-capital-l-p/) | $9.3M | 733,774 | 0.2% | 1 |
| [Ikarian Capital, LLC](https://holderbook.com/funds/1778253-ikarian-capital-llc/) | $8.0M | 430,000 | 0.9% | 1 |
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $6.6M | 518,803 | 0.0% | 2 |
| [Woodline Partners LP](https://holderbook.com/funds/1784547-woodline-partners-lp/) | $3.6M | 286,212 | 0.0% | 1 |
| [AMERICAN CENTURY COMPANIES INC](https://holderbook.com/funds/748054-american-century-companies-inc/) | $3.5M | 272,752 | 0.0% | 2 |
| [Sanofi](https://holderbook.com/funds/1121404-sanofi/) | $3.1M | 244,083 | 0.6% | 7 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $3.1M | 241,326 | 0.0% | 5 |
| [ACADIAN ASSET MANAGEMENT LLC](https://holderbook.com/funds/916542-acadian-asset-management-llc/) | $2.8M | 218,234 | 0.0% | 6 |
| [ACORN CAPITAL ADVISORS, LLC](https://holderbook.com/funds/2054410-acorn-capital-advisors-llc/) | $2.8M | 216,171 | 0.8% | 7 |
| [BOOTHBAY FUND MANAGEMENT, LLC](https://holderbook.com/funds/1549230-boothbay-fund-management-llc/) | $2.4M | 130,427 | 0.0% | 1 |
| [RENAISSANCE TECHNOLOGIES LLC](https://holderbook.com/funds/1037389-renaissance-technologies-llc/) | $2.3M | 179,600 | 0.0% | 5 |
| [JANE STREET GROUP, LLC](https://holderbook.com/funds/1595888-jane-street-group-llc/) | $2.1M | 162,747 | 0.0% | 3 |
| [MONIMUS CAPITAL MANAGEMENT, LP](https://holderbook.com/funds/1848831-monimus-capital-management-lp/) | $1.7M | 132,036 | 0.4% | 2 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $1.6M | 122,690 | 0.0% | 10 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $1.5M | 118,507 | 0.0% | 8 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $1.3M | 104,428 | 0.0% | 9 |
| [MARSHALL WACE, LLP](https://holderbook.com/funds/1318757-marshall-wace-llp/) | $854.2K | 67,045 | 0.0% | 2 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 73 | $288.3M |
| Q1 2026 | 53 | $60.6M |
| Q4 2025 | 51 | $26.7M |
| Q3 2025 | 52 | $16.6M |
| Q2 2025 | 62 | $13.4M |
| Q1 2025 | 74 | $15.5M |
| Q4 2024 | 93 | $38.4M |
| Q3 2024 | 73 | $406.0M |
| Q2 2024 | 55 | $144.2M |
| Q1 2024 | 39 | $126.1M |