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Q32 Bio Inc. (QTTB) institutional ownership

Latest close $14.64 Jul 29, 2026
Market cap$89M 52-week range SectorHealthcare
Funds holding · Q1 2026
40
reported QTTB position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
23 buyers · 17 sellers

Q32 Bio Inc. (QTTB) price and institutional activity

Dates

Q1 2026

$0 bought by 23 investors
Opaleye Management Inc.Mackenzie Financial Corp +21 more
$0 sold by 17 investors
Acorn Capital Advisors, LLCPfizer Inc +15 more
Bought Sold Totals per quarter; hover a bar for the names.

Q32 Bio Inc. (QTTB) institutional activity · 40

Investor Type Est. change Change Δ Own Date
Opaleye Management Inc. · Added
Change +1.0M Date Q1 2026
Opaleye Management Inc. Added· Q1 2026 +1.0M Q1 2026
Mackenzie Financial Corp · New
Change +246K Date Q1 2026
Mackenzie Financial Corp New· Q1 2026 +246K Q1 2026
Acorn Capital Advisors, LLC · Reduced
Change −178K Date Q1 2026
Acorn Capital Advisors, LLC Reduced· Q1 2026 −178K Q1 2026
Pfizer Inc · Reduced
Change −176K Date Q1 2026
Pfizer Inc Reduced· Q1 2026 −176K Q1 2026
Monimus Capital Management, LP · New
Change +134K Date Q1 2026
Monimus Capital Management, LP New· Q1 2026 +134K Q1 2026
Acadian Asset Management LLC · Added
Change +124K Date Q1 2026
Acadian Asset Management LLC Added· Q1 2026 +124K Q1 2026
Renaissance Technologies LLC Added· Q1 2026 +107K +107.7% Q1 2026
Marshall Wace, LLP · New
Change +52K Date Q1 2026
Marshall Wace, LLP New· Q1 2026 +52K Q1 2026
Millennium Management LLC · Exited
Change −51K Δ Own −100.0% Date Q1 2026
Millennium Management LLC Exited· Q1 2026 −51K −100.0% Q1 2026
Monaco Asset Management Sam · Exited
Change −51K Δ Own −100.0% Date Q1 2026
Monaco Asset Management Sam Exited· Q1 2026 −51K −100.0% Q1 2026
Jane Street Group, LLC · Added
Change +40K Date Q1 2026
Jane Street Group, LLC Added· Q1 2026 +40K Q1 2026
Vanguard · Added
Change +37K Date Q1 2026
Vanguard Added· Q1 2026 +37K Q1 2026
Cambridge Investment Research Advisors, Inc. · New
Change +35K Date Q1 2026
Cambridge Investment Research Advisors, Inc. New· Q1 2026 +35K Q1 2026
Citadel Advisors LLC Reduced· Q1 2026 −30K −66.1% Q1 2026
BlackRock · Added
Change +26K Date Q1 2026
BlackRock Added· Q1 2026 +26K Q1 2026
Data through Q1 2026 · filed May 16, 2026
15 of 40

Famous investor activity in Q32 Bio Inc. (QTTB)

Q32 Bio Inc. (QTTB) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Violette Shelia M. · Officer Grant (A) 38K
Owned 131K ΔOwn +40.3% Trade date Jul 16, 2026 Filed date Jul 20, 2026
Violette Shelia M. Officer Grant (A) 38K 131K +40.3% Jul 16, 2026 Jul 20, 2026
Morrison Jodie Pope · Director Grant (A) 132K
Owned 353K ΔOwn +59.7% Trade date Jul 16, 2026 Filed date Jul 20, 2026
Morrison Jodie Pope Director Grant (A) 132K 353K +59.7% Jul 16, 2026 Jul 20, 2026
Kalowski Lee · Officer Grant (A) 53K
Owned 142K ΔOwn +59.7% Trade date Jul 16, 2026 Filed date Jul 20, 2026
Kalowski Lee Officer Grant (A) 53K 142K +59.7% Jul 16, 2026 Jul 20, 2026
Manke Isaac · Director 2 operations 0
Price $2.80 Owned 0 Trade date Jun 30, 2026 Filed date Jul 2, 2026
Manke Isaac Director 2 operations $2.80 0 0 Jun 30, 2026 Jul 2, 2026
Laporte Kathleen · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Laporte Kathleen Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Iwicki Mark T. · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Iwicki Mark T. Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Manke Isaac · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Manke Isaac Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Tzianabos Arthur · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Tzianabos Arthur Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Grayzel David S. · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Grayzel David S. Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Thistle Mary · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Thistle Mary Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Xu Diyong · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Xu Diyong Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Lundberg Sven Ante · Director Grant (A) 10K
Owned 10K Trade date Jun 12, 2026 Filed date Jun 16, 2026
Lundberg Sven Ante Director Grant (A) 10K 10K Jun 12, 2026 Jun 16, 2026
Xu Diyong · Director 2 operations +$15M
Price $8.00 Qty +1.9M Owned 625K Trade date May 28, 2026 Filed date Jun 1, 2026
Xu Diyong Director 2 operations $8.00 +1.9M +$15M 625K May 28, 2026 Jun 1, 2026
Orbimed Advisors LLC · Director 2 operations +$15M
Price $8.00 Qty +1.9M Owned 625K Trade date May 28, 2026 Filed date Jun 1, 2026
Orbimed Advisors LLC Director 2 operations $8.00 +1.9M +$15M 625K May 28, 2026 Jun 1, 2026
Kalowski Lee · Officer Sell −$18K
Price $4.51 Qty −4K Owned 36K Trade date Feb 25, 2026 Filed date Feb 27, 2026
Kalowski Lee Officer Sell $4.51 −4K −$18K 36K Feb 25, 2026 Feb 27, 2026
15 of 36
15 of 36 Sign in to continue to older insider transactions.

Q32 Bio Inc. (QTTB) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Boxer Capital Management, LLC 3.1M
% of shares outstanding 13.3% Filing date Jul 10, 2026
Boxer Capital Management, LLC 3.1M 13.3% Jul 10, 2026
Sirenia Capital Management LP 2.1M
% of shares outstanding 9.9% Filing date May 15, 2026
Sirenia Capital Management LP 2.1M 9.9% May 15, 2026
Ra Capital Management, L.P. 2.3M
% of shares outstanding 9.8% Filing date Jun 4, 2026
Ra Capital Management, L.P. 2.3M 9.8% Jun 4, 2026
Opaleye Management Inc. 1.3M
% of shares outstanding 8.6% Filing date May 6, 2026
Opaleye Management Inc. 1.3M 8.6% May 6, 2026
Point72 Asset Management, L.P. 959K
% of shares outstanding 5.7% Filing date May 15, 2026
Point72 Asset Management, L.P. 959K 5.7% May 15, 2026
Biotechnology Value Fund L P 1.2M
% of shares outstanding 5.3% Filing date Jun 4, 2026
Biotechnology Value Fund L P 1.2M 5.3% Jun 4, 2026
The Carlyle Group Inc. 692K
% of shares outstanding 4.1% Filing date Jul 6, 2026
The Carlyle Group Inc. 692K 4.1% Jul 6, 2026
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Q32 Bio Inc. (QTTB) ownership FAQ

Who owns QTTB?

40 reporting institutions disclosed QTTB position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.