QTTB Institutional Ownership
Who owns Q32 Bio Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 71 funds reported holding QTTB at Jun 30, 2026, together owning 74.6% of the company.
- ▲45 buying vs 21 selling
- ▲Held by funds +42.9 pts
- ▲Funds holding +18
- ▲Superinvestors: 3 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 71 | 53 | +34.0% |
| In funds' top 10 | 3 | 4 | −25.0% |
| 13F shares | 22.2M | 9.4M | +135.4% |
| Held by funds | 74.6% | 31.7% | +42.9 pts |
| New positions | 27 | 8 | +237.5% |
| Increased | 18 | 14 | +28.6% |
| Reduced | 13 | 9 | +44.4% |
| Sold out | 8 | 8 | 0.0% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 261K | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in QTTB
All superinvestors →
Who owns QTTB
share of fund held shares- Index and passive funds4.2%
- Active managers and hedge funds94.8%
- Banks and brokers1.0%
- Pensions, insurers and other0.0%
The top 10 holders own 84.8% of all QTTB shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
6 funds changed their position- Cambridge Investment Research Advisors, Inc.Sold out−36K sh
- State of WyomingNew+70 sh
- Caitong International Asset Management Co., LtdSold out−45 sh
- SBI Securities Co., Ltd.Added+60 sh
- Physician Wealth Advisors, Inc.New+42 sh
🔒 Free account: see all 6.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Orbimed Advisors LLC | 13.87% | 4.1M | $52.6M | +1.9M |
| 2 | Boxer Capital Management, LLC | 10.58% | 3.1M | $40.1M | +3.1M |
| 3 | Atlas Venture Life Science Advisors, LLC | 9.13% | 2.7M | $34.6M | +625K |
| 4 | Bvf Inc/il | 7.89% | 2.4M | $29.9M | +2.4M |
| 5 | RA Capital Management, L.P. | 7.84% | 2.3M | $29.7M | +2.3M |
| 6 | Point72 Asset Management, L.P. | 3.94% | 1.2M | $14.9M | +1.2M |
| 7 | Opaleye Management Inc. | 3.13% | 931K | $11.9M | −325K |
| 8 | Logos Global Management LP | 2.69% | 800K | $10.2M | +800K |
| 9 | SummitTX Capital, L.P. | 2.46% | 734K | $9.3M | +734K |
| 10 | Vanguard Capital Management LLC | 1.74% | 519K | $6.6M | +212K |
- Boxer Capital Management, LLC+3.1M sh+$40.1M
- Bvf Inc/il+2.4M sh+$29.9M
- RA Capital Management, L.P.+2.3M sh+$29.7M
- Orbimed Advisors LLC+1.9M sh+$23.9M
- Point72 Asset Management, L.P.+1.2M sh+$14.9M
- Logos Global Management LP+800K sh+$10.2M
- SummitTX Capital, L.P.+734K sh+$9.3M
- Atlas Venture Life Science Advisors, LLC+625K sh+$8M
- Carlyle Group Inc.−1M sh−$13.3M
- Opaleye Management Inc.−325K sh−$4.1M
- ARCH Venture Management, LLC−320K sh−$2.1M
- Mackenzie Financial Corp−246K sh−$1.6M
- Acorn Capital Advisors, LLC−99K sh−$1.3M
- Pfizer Inc−102K sh−$737K
- Renaissance Technologies LLC−27K sh−$348K
- ADAR1 Capital Management, LLC−35K sh−$225K
QTTB institutional ownership FAQ
Who owns the most QTTB stock?
In Q2 2026 13F filings the largest holder of QTTB was Orbimed Advisors LLC, followed by Boxer Capital Management, LLC and Atlas Venture Life Science Advisors, LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of QTTB is owned by institutions?
Funds that file 13F reports held 74.6% of QTTB's shares at Jun 30, 2026, compared with 31.7% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying QTTB?
In Q2 2026, 45 funds bought QTTB (27 of them new positions) and 21 sold (8 sold out completely). Among well known investors, 3 added and 1 cut. Our fund sentiment for QTTB is strongly bullish.
What is QTTB's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this QTTB ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.