Summary
Updated Aug 31, 2026
David Nierenberg files SEC Form 4 reports at POTBELLY CORP (PBPB). 1 SEC Form 4 filing on record, dated 20 December 2024. Most recent open-market trade: bought $29K of PBPB on 20 December 2024. Lifetime open-market purchases: $44K.
Recent Transactions
2Every recent SEC Form 4 transaction David Nierenberg has reported, most recent first.
Trading Pattern
InsiderAlpha's records for David Nierenberg go back to 2024: 1 primary Form 4 filing, an average of 0.3 per year. The typical open-market purchase is $22K (2 buys totaling $44K). The largest single buy on record is $29K of PBPB in 2024. 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 Sector
No other insider has filed at David Nierenberg's companies, so these are insiders reporting open-market trades at other companies in the same sector.
- KL Pattern Holdings LP - $170.79M of PTRN open-market activity in the last 12 months
- Coliseum Capital Management, LLC - $155.01M of UTI open-market activity in the last 12 months
- PEP TG Investments GP LLC - $147.00M of CALY open-market activity in the last 12 months
- Neil Mehta - $136.56M of CPNG open-market activity in the last 12 months
- Mary T. Barra - $135.41M of GM open-market activity in the last 12 months
- David K. Wright - $122.57M of PTRN 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 Nierenberg?
David Nierenberg is a corporate insider of POTBELLY CORP (PBPB). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did David Nierenberg last file a Form 4?
The only primary Form 4 on record is dated 20 December 2024.
Has David Nierenberg been buying or selling stock?
Recorded transactions: 2 open-market purchases ($44K) and 0 open-market sales across all tracked filings.
Where can I see all of David Nierenberg'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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