Nierenberg David purchased ~$830K in Potbelly Corporation stock
Potbelly Corporation (PBPB) · Data via SEC EDGAR Form 4
Price Performance · 10 days before → 90 days after trade
▲ = insider buy date
90-day return
+27.0%
Trade Details · Public SEC Filing
Insider
Nierenberg David
Role
—
Transaction
Open-Market Purchase
Approx. Value
~$830K
Trade Date
Mar 28, 2025
Company
Potbelly Corporation
Ticker
PBPBSource
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.
~$830K purchase
A significant position. Insiders who invest $500K+ of their own money typically have strong views on their company's near-term outlook.
+27.0% in 90 days
Measured from trade date to 90 days later. We track the performance of every insider trade to identify which insiders consistently make profitable moves.
How good is Nierenberg David at picking stocks?
Full track record: win rate, average return, and performance vs S&P 500
On March 28, 2025, Nierenberg David — a corporate insider at Potbelly Corporation — filed a Form 4 with the SEC disclosing an open-market purchase of approximately ~$830K in Potbelly Corporation (PBPB) 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.
In the 90 days following this trade, PBPB returned +27.0%
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
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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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