NASDAQ: QTTB
Q32 Bio Inc Stock Ownership - Who owns Q32 Bio?

Insider buying vs selling

Have Q32 Bio Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Lee KalowskiCFO;Pres2026-10-061,301$8.32
$10.82kSell
Shelia M. VioletteCSci2026-10-06917$8.32
$7.63kSell
Jodie Pope MorrisonCEO2026-10-063,221$8.32
$26.80kSell
Jodie Pope MorrisonCEO2026-08-259,845$16.56
$163.03kSell
Shelia M. VioletteCSci2026-08-252,798$16.56
$46.33kSell
Lee KalowskiCFO;Pres2026-08-253,972$16.56
$65.78kSell
Isaac MankeDirector2026-06-3053,521$2.80
$149.86kBuy
Diyong XuDirector2026-05-28625,000$8.00
$5.00MBuy
Orbimed Advisors LLCDirector2026-05-281,250,000$8.00
$10.00MBuy
Orbimed Advisors LLCDirector2026-05-28625,000$8.00
$5.00MBuy

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Net Insider Buy/Sell (L12M) Ownership

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QTTB Shareholders

What type of owners hold Q32 Bio Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Arch Venture Fund VIII LP19.38%5,768,694$50.53MInsider
James E. Flynn13.73%4,087,305$35.80MInsider
Diyong Xu9.67%2,877,987$25.21MInsider
Orbimed Advisors LLC9.67%2,877,987$25.21MInsider
David S. Grayzel7.03%2,092,106$18.33MInsider
Atlas Venture Fund X LP7.03%2,092,106$18.33MInsider
Mahendra Shah3.06%909,742$7.97MInsider
Atlas Venture Opportunity Fund ILL LP2.10%625,000$5.48MInsider
Jodie Pope Morrison1.14%340,038$2.98MInsider
Siyamak Rasty0.75%222,707$1.95MInsider

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QTTB vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
QTTB0.07%76.90%Net BuyingNet Selling
LXEO0.11%9.20%Net SellingNet Selling
BCYC0.05%43.35%Net SellingNet Selling
LCTX0.05%60.39%Net Selling
ALEC0.08%43.66%Net SellingNet Selling

Q32 Bio Stock Ownership FAQ

Who owns Q32 Bio?

Q32 Bio (NASDAQ: QTTB) is owned by 0.07% institutional shareholders, 76.90% Q32 Bio insiders, and 23.02% retail investors. Arch Venture Fund VIII LP is the largest individual Q32 Bio shareholder, owning 5.77M shares representing 19.38% of the company. Arch Venture Fund VIII LP's Q32 Bio shares are currently valued at $51.75M.

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