Who owns Q32 Bio Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of QTTB from SEC Form 13F filings across 70 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 70 institutions disclosed 21.4M shares of Q32 Bio Inc. worth $273.2M — about 105.4% of shares outstanding; the largest disclosed holder is ORBIMED ADVISORS LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
70
13F holders
$273.2M
value, 2026 filers
105.4%
of shares outstanding (21.4M sh)
26
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of QTTB's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | ORBIMED ADVISORS LLC | 4.1M | $52.6M | 1.0% | 20.3% | +83.2% |
| 2 | Boxer Capital Management, LLCNEW | 3.1M | $40.1M | 3.0% | 15.5% | new |
| 3 | Atlas Venture Life Science Advisors, LLC | 2.7M | $34.6M | 3.9% | 13.4% | +29.9% |
| 4 | BVF INC/ILNEW | 2.4M | $29.9M | 0.8% | 11.6% | new |
| 5 | RA CAPITAL MANAGEMENT, L.P.NEW | 2.3M | $29.7M | 0.3% | 11.5% | new |
| 6 | Point72 Asset Management, L.P.NEW | 1.2M | $14.9M | 0.0% | 5.8% | new |
| 7 | Opaleye Management Inc. | 931,000 | $11.9M | 1.1% | 4.6% | -25.9% |
| 8 | Logos Global Management LPNEW | 800,000 | $10.2M | 0.4% | 3.9% | new |
| 9 | VANGUARD CAPITAL MANAGEMENT LLC | 518,803 | $6.6M | 0.0% | 2.6% | +69.3% |
| 10 | Ikarian Capital, LLCNEW | 430,000 | $5.5M | 0.6% | 2.1% | new |
| 11 | Woodline Partners LPNEW | 286,212 | $3.6M | 0.0% | 1.4% | new |
| 12 | AMERICAN CENTURY COMPANIES INC | 272,752 | $3.5M | 0.0% | 1.3% | +1353.1% |
| 13 | Sanofi | 244,083 | $3.1M | 0.6% | 1.2% | 0.0% |
| 14 | ACADIAN ASSET MANAGEMENT LLC | 218,234 | $2.8M | 0.0% | 1.1% | +26.4% |
| 15 | ACORN CAPITAL ADVISORS, LLC | 216,171 | $2.8M | 0.8% | 1.1% | -31.4% |
| 16 | RENAISSANCE TECHNOLOGIES LLC | 179,600 | $2.3M | 0.0% | 0.9% | -13.2% |
| 17 | JANE STREET GROUP, LLC | 162,747 | $2.1M | 0.0% | 0.8% | +148.1% |
| 18 | MONIMUS CAPITAL MANAGEMENT, LP | 132,036 | $1.7M | 0.4% | 0.6% | -1.7% |
| 19 | BOOTHBAY FUND MANAGEMENT, LLCNEW | 130,427 | $1.7M | 0.0% | 0.6% | new |
| 20 | GEODE CAPITAL MANAGEMENT, LLC | 122,690 | $1.6M | 0.0% | 0.6% | +3.8% |
| 21 | CITADEL ADVISORS LLC | 120,663 | $1.5M | 0.0% | 0.6% | +679.4% |
| 22 | BlackRock, Inc. | 118,507 | $1.5M | 0.0% | 0.6% | +37.6% |
| 23 | MARSHALL WACE, LLP | 67,045 | $854,153 | 0.0% | 0.3% | +27.9% |
| 24 | VANGUARD FIDUCIARY TRUST CO | 66,217 | $843,605 | 0.0% | 0.3% | +32.4% |
| 25 | Carlyle Group Inc. | 60,363 | $769,020 | 0.0% | 0.3% | -94.5% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.