Heron Patrick J purchased ~$60M in MBX Biosciences, Inc. Common Stock stock
MBX Biosciences, Inc. Common Stock (MBX) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
Trade Details · Public SEC Filing
Insider
Heron Patrick J
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$60M
Trade Date
Sep 26, 2025
Company
MBX Biosciences, Inc. Common Stock
Ticker
MBXSource
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.
~$60M 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.
How good is Heron Patrick J at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
On September 26, 2025, Heron Patrick J — a corporate insider at MBX Biosciences, Inc. Common Stock — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$60M in MBX Biosciences, Inc. Common Stock (MBX) stock.
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 MBX Insider Activity
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New Enterprise Associates 17, L.P.
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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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