ORBIMED ADVISORS LLC purchased ~$150M in Q32 Bio Inc stock
Q32 Bio Inc (QTTB) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
Trade Details · Public SEC Filing
Insider
ORBIMED ADVISORS LLC
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$150M
Trade Date
May 28, 2026
Company
Q32 Bio Inc
Ticker
QTTBSource
SEC EDGAR Form 4
Why This Trade Stands Out
Very Strong conviction signal
Scored in the top tier across multiple factors. Fewer than 5% of insider trades receive this rating.
~$150M purchase
Trades over $1M are rare. When insiders put this much of their own money on the line, they tend to have high conviction in their company's direction.
2 insiders traded in the same window
When multiple insiders independently buy within 30 days, it's called a cluster. Studies show clustered insider purchases outperform solo trades significantly, because several people with inside knowledge are reaching the same conclusion.
How good is ORBIMED ADVISORS LLC at picking stocks?
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ORBIMED ADVISORS LLC wasn't the only one buying.
2 insiders at Q32 Bio Inc traded within the same 30-day window.
See who else bought · FreeOn May 28, 2026, ORBIMED ADVISORS LLC — a corporate insider at Q32 Bio Inc — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$150M in Q32 Bio Inc (QTTB) stock.
This transaction was part of a cluster — 2 insiders at Q32 Bio Inc made open-market purchases within the same 30-day window. Cluster activity from multiple independent insiders is one of the most studied patterns in insider trading research.
Under Section 16(a) of the Securities Exchange Act of 1934, corporate insiders must report all open-market stock transactions to the SEC within two business days. These filings — known as Form 4s — are publicly available on the SEC's EDGAR database. VeritySignals filters and scores the full Form 4 stream to surface high-conviction signals like this one.
VeritySignals Conviction Analysis
Full Conviction Analysis
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All data sourced from publicly available SEC Form 4 filings via EDGAR · Not financial advice · Past performance does not guarantee future results.
At a Glance
More QTTB Insider Activity
ORBIMED ADVISORS LLC
May 28, 2026
~$10M
VS
ORBIMED ADVISORS LLC
May 28, 2026
~$5.0M
VS
Xu Diyong
May 28, 2026
~$10M
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Xu Diyong
May 28, 2026
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How to Read Insider Trades
What is this?
When company executives buy or sell their own stock, they must report it to the SEC within 2 days. These public filings reveal what the people who know the company best are doing with their own money.
Why does it matter?
Insiders can sell for many reasons (taxes, diversification, expenses), but they generally only buy for one: they think the stock is going up. That's why insider purchases are more predictive than sales.
What makes a trade "strong"?
We score trades on 15+ factors: the insider's role (CEO > director), trade size relative to their salary, whether other insiders also bought (clusters), and historical accuracy of the insider.
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