QTTB Q32 Bio Inc.
Q32 Bio Inc. (QTTB) Institutional Ownership
What the institutions did with QTTB last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| ORBIMED ADVISORS LLC | 4.1M | 18.6% |
| Boxer Capital Management, LLC | 3.1M | 14.2% |
| Atlas Venture Life Science Advisors, LLC | 2.7M | 12.2% |
| BVF INC/IL | 2.4M | 10.6% |
| RA CAPITAL MANAGEMENT, L.P. | 2.3M | 10.5% |
| Point72 Asset Management, L.P. | 1.2M | 5.3% |
| Opaleye Management Inc. | 931.0K | 4.2% |
| Logos Global Management LP | 800.0K | 3.6% |
| SummitTX Capital, L.P. | 733.8K | 3.3% |
| VANGUARD CAPITAL MANAGEMENT LLC | 518.8K | 2.3% |
| Ikarian Capital, LLC | 430.0K | 1.9% |
| Woodline Partners LP | 286.2K | 1.3% |
| AMERICAN CENTURY COMPANIES INC | 272.8K | 1.2% |
| Sanofi | 244.1K | 1.1% |
| ACADIAN ASSET MANAGEMENT LLC | 218.2K | 1.0% |
| ACORN CAPITAL ADVISORS, LLC | 216.2K | 1.0% |
| RENAISSANCE TECHNOLOGIES LLC | 179.6K | 0.8% |
| JANE STREET GROUP, LLC | 162.7K | 0.7% |
| MONIMUS CAPITAL MANAGEMENT, LP | 132.0K | 0.6% |
| BOOTHBAY FUND MANAGEMENT, LLC | 130.4K | 0.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 122.7K | 0.6% |
| CITADEL ADVISORS LLC | 120.7K | 0.5% |
| BlackRock, Inc. | 118.5K | 0.5% |
| MARSHALL WACE, LLP | 67.0K | 0.3% |
| VANGUARD FIDUCIARY TRUST CO | 66.2K | 0.3% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Boxer Capital Management, LLC | New | 0 | 3.1M | +3.1M |
| BVF INC/IL | New | 0 | 2.4M | +2.4M |
| RA CAPITAL MANAGEMENT, L.P. | New | 0 | 2.3M | +2.3M |
| ORBIMED ADVISORS LLC | Increased | 2.3M | 4.1M | +1.9M |
| Point72 Asset Management, L.P. | New | 0 | 1.2M | +1.2M |
| Carlyle Group Inc. | Reduced | 1.1M | 60.4K | -1.0M |
| Logos Global Management LP | New | 0 | 800.0K | +800.0K |
| SummitTX Capital, L.P. | New | 0 | 733.8K | +733.8K |
| Atlas Venture Life Science Advisors, LLC | Increased | 2.1M | 2.7M | +625.0K |
| Ikarian Capital, LLC | New | 0 | 430.0K | +430.0K |
| Opaleye Management Inc. | Reduced | 1.3M | 931.0K | -325.2K |
| ARCH Venture Management, LLC | Sold Out | 320.5K | 0 | -320.5K |
| Woodline Partners LP | New | 0 | 286.2K | +286.2K |
| AMERICAN CENTURY COMPANIES INC | Increased | 18.8K | 272.8K | +254.0K |
| MACKENZIE FINANCIAL CORP | Sold Out | 246.3K | 0 | -246.3K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 306.4K | 518.8K | +212.4K |
| BOOTHBAY FUND MANAGEMENT, LLC | New | 0 | 130.4K | +130.4K |
| CITADEL ADVISORS LLC | Increased | 15.5K | 120.7K | +105.2K |
| Pfizer Inc | Sold Out | 101.6K | 0 | -101.6K |
| ACORN CAPITAL ADVISORS, LLC | Reduced | 315.1K | 216.2K | -98.9K |
| JANE STREET GROUP, LLC | Increased | 65.6K | 162.7K | +97.1K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 172.6K | 218.2K | +45.6K |
| Quadrature Capital Ltd | New | 0 | 36.4K | +36.4K |
| ADAR1 Capital Management, LLC | Sold Out | 35.0K | 0 | -35.0K |
| DAFNA Capital Management LLC | New | 0 | 32.9K | +32.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.