Q32 Bio Inc
Ownership
Ownership Structure
Who owns Q32 Bio Inc (QTTB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 48.5% of the shares are freely tradable; institutional investors hold 70.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Atlas Venture Life Science Advisors, LLC | 16.02 | 2,717,106 | +29.9 | 06/30/2026 |
| Orbimed Advisors LLC | 13.29 | 2,252,987 | +0.0 | 03/31/2026 |
| Opaleye Management Inc | 5.49 | 931,000 | -25.9 | 06/30/2026 |
| Logos Global Management LP | 4.72 | 800,000 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 1.81 | 306,401 | +0.0 | 03/31/2026 |
| American Century Companies Inc | 1.61 | 272,752 | +1,353.1 | 06/30/2026 |
| Mackenzie Investments | 1.45 | 246,304 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.54 | 755,247 | +0.0 | 08/31/2026 |
| Avantis US Small Cap Value ETF | 1.71 | 510,364 | +0.9 | 08/31/2026 |
| JPMorgan Small Cap Growth A | 1.71 | 508,056 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Morrison Jodie Pope | CEO | 343,259 | 3,020,679 $ | Aug 25, 2026 | direct |
| Kalowski Lee | CFO and President | 138,471 | 1,218,545 $ | Aug 25, 2026 | direct |
| Violette Shelia M. | Chief Scientific Officer | 127,771 | 1,124,385 $ | Aug 25, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 25, 2026 | Kalowski Lee | CFO and President | Sell | 3,972 | 16.56 | 65,776 |
| Aug 25, 2026 | Morrison Jodie Pope | CEO | Sell | 9,845 | 16.56 | 163,033 |
| Aug 25, 2026 | Violette Shelia M. | Chief Scientific Officer | Sell | 2,798 | 16.56 | 46,335 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.