Summary
Updated Aug 30, 2026
David S. Grayzel files SEC Form 4 reports at Q32 Bio Inc. (QTTB). 4 SEC Form 4 filings on record going back to 2025, most recently on 22 July 2026.
Trading Pattern
InsiderAlpha's records for David S. Grayzel go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies David S. Grayzel files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- ORBIMED ADVISORS LLC - $15.00M of QTTB open-market activity in the last 12 months
- Diyong Xu - $15.00M of QTTB open-market activity in the last 12 months
- Jodie Pope Morrison - $286K of QTTB open-market activity in the last 12 months
- Lee Kalowski - $115K of QTTB open-market activity in the last 12 months
- Shelia M. Violette - $59K of QTTB open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is David S. Grayzel?
David S. Grayzel is a corporate insider of Q32 Bio Inc. (QTTB). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has David S. Grayzel submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Where can I see all of David S. Grayzel's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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