Q32 Bio Inc.
QTTB- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001661998
In the last 90 days, Q32 Bio Inc. insiders filed 0 open-market purchases and 3 sales; 72 institutions reported holding it in 13F filings for Q2 2026, worth $282.6M in total; no superinvestor holds it.
Holders of 5% or more of QTTB
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Q32 Bio Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| OrbiMed Advisors LLC | 13D/A | 15.40%2.25M shares | – | Mar 12, 20261 filing | Mar 12, 2026 | SEC |
| Point72 Asset Management, L.P. | 13G | 9.90%2.06M shares | New | Feb 19, 20261 filing | Feb 19, 2026 | SEC |
| Opaleye Management Inc. | 13G | 8.65%1.26M shares | New | Feb 20, 20261 filing | Feb 20, 2026 | SEC |
| ADAR1 Partners, LP | 13G | 5.40%3.12M shares | New | Mar 14, 20241 filing | Mar 14, 2024 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
8 Schedule 13D and 13G filings on Q32 Bio Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 12, 20265:06 PM ET | OrbiMed Advisors LLCand 1 other | 13D/A | 15.40%2.25M shares | – | Feb 18, 2026 | SEC |
| Feb 20, 20268:13 PM ET | Opaleye Management Inc.and 2 others | 13G | 8.65%1.26M shares | New | Feb 19, 2026 | SEC |
| Feb 19, 20264:59 PM ET | Point72 Asset Management, L.P.and 2 others | 13G | 9.90%2.06M shares | New | Feb 17, 2026 | SEC |
| Feb 13, 20265:08 PM ET | Pfizer Inc | 13G/A | 2.30%277.8K shares | –Below 5% | Dec 31, 2024 | SEC |
| Apr 8, 20253:14 PM ET | Sio Capital Management, LLC | 13G | 0.00%0 shares | −5.73 ppfrom 5.73%Below 5% | Mar 31, 2025 | SEC |
| Feb 14, 20254:10 PM ET | Bristol Myers Squibb Co | 13G/A | 1.64%200.2K shares | –Below 5% | Dec 31, 2024 | SEC |
| Feb 10, 202512:57 PM ET | Sio Capital Management, LLC | 13G | 5.73%697.4K shares | New | Dec 31, 2024 | SEC |
| Mar 14, 20247:42 AM ET | ADAR1 Partners, LPand 3 others | 13G | 5.40%3.12M shares | New | Mar 4, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Q32 Bio Inc. shares.
No Form 144 notices for Q32 Bio Inc. are on file.