Security key
746964105
Q32 Bio Inc. - Common Stock, par value $0.0001 per share (QTTB)
CUSIP: 746964105
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 8,978,370
- Total 13F value
- $13,355,302
- Share change
- -427,571
- SEC-reported price per share
- $1.49
- Number of holders
- 59
- Value change
- -$657,201
- Number of buys
- 21
- Number of sells
- 39
- Shares outstanding
- 16,958,106
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
59
Top holders
10
QTTB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Q32 Bio Inc. SEC filings
Q32 Bio Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 746964105
Recent filing periods:
Ownership snapshot
Top reported holders of QTTB - Q32 Bio Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
PFIZER INC
Disclosed value leader
ORBIMED ADVISORS LLC
Comparable rows
15/15
Latest evidence
31 Mar 2025
13D/G
13F
Lead comparable stake: 2.3%
13D/G row: PFIZER INC
Showing 1-6 of 15 holder rows.
Quick read
PFIZER INC leads the comparable SEC ownership view at 2.3%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens PFIZER INC's linked filing trail.
Comparable ownership
Top 5
PFIZER INC
2.3%
BRISTOL MYERS SQUIBB CO
1.6%
ORBIMED ADVISORS LLC
13%
Atlas Venture Life Science Adviso...
12%
Carlyle Group Inc.
6.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| PFIZER INC |
13D/G
13F
Pfizer Inc. (IRS Identification No.: 13-5315170) · Company
|
2.3%
|
$994,442
277,777 shares
|
$0 | 31 Dec 2024 |
| BRISTOL MYERS SQUIBB CO |
13D/G
|
1.6%
|
$312,381
200,244 shares
|
$0 | 31 Dec 2024 |
| ORBIMED ADVISORS LLC |
13F
Company
|
13%
|
$3,717,429
2,252,987 shares
|
— | 31 Mar 2025 |
| Atlas Venture Life Science Advisors, LLC |
13F
Company
|
12%
|
$3,451,975
2,092,106 shares
|
— | 31 Mar 2025 |
| Carlyle Group Inc. |
13F
Company
|
6.5%
|
$1,808,495
1,102,741 shares
|
— | 31 Mar 2025 |
| ACORN CAPITAL ADVISORS, LLC |
13F
Company
|
4.7%
|
$1,325,651
803,425 shares
|
— | 31 Mar 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
59
Shares
8,978,370
Rows available
59
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2025 vs Q1 2026 Across Filers
Q1 2026 holders
53
Q2 2025 holders
59
Holder diff
6
| Investor | Q1 2026 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend