Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Nierenberg Investment Management Company, LLC - 14 Mar 2025 SCHEDULE 13D/A Report for Potbelly Corp. Common Stock, par value $0.01 (PBPB)
- Filing manager
- Nierenberg Investment Management Company, LLC
- Reporting owner
- David Nierenberg
- Beneficially owned shares
- 3,087,302 shares
- Large-stake signal
-
Ownership
10%Beneficial ownership of this reported class.
Shares
3,087,302 sharesShares beneficially owned as disclosed.
Event date
14 Mar 2025Date tied to the ownership event or amendment.
Accepted by SEC
17 Mar 2025EDGAR acceptance date.
How to read this large-stake filing
- Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
- Compare this filing with the holder history and issuer page before treating the percentage as a current position.
- Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
- Class ownership
- 10%
- Symbol
- PBPB
- Shares outstanding
- 29,973,806 shares
- SEC form
- SCHEDULE 13D/A
- Accepted by SEC
- 17 Mar 2025, 16:14:09 UTC
- Event date
- 14 Mar 2025
- Source filing
- View source filing
Ownership signal
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Subject security
Names, identifiers, and filing context for this profile.
2 source fields
Source evidence
Original filing metadata and source links for verification.
4 source fields
Key filing fact
Nierenberg Investment Management Company, LLC disclosed 10% ownership in Potbelly Corp. Common Stock, par value $0.01 (PBPB) on 14 Mar 2025.
Key facts
- Nierenberg Investment Management Company, LLC filed SCHEDULE 13D/A for Potbelly Corp. Common Stock, par value $0.01 (PBPB).
- Disclosed ownership: 10%.
- Date of event: 14 Mar 2025.
Change
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 17 Mar 2025, 16:14.
Research use
- This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
- Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.
Evidence
Backed by Schedule 13D/13G
View source filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Disclosed reporting parties (6)
Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares owned | Sole voting power | Shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| D3 Family Fund, LP | 3% | 887,555 | 0 | 887,555 | Nierenberg Investment Management Company, Inc. | /s/David Nierenberg, President | 0001282685 |
| D3 Family Bulldog Fund, LP | 5.2% | 1,561,985 | 0 | 1,561,985 | /s/ David Nierenberg | D3 Family Bulldog Fund, LP | 0001365745 |
| Benedict Value Fund, L.P. | 1.4% | 425,555 | 0 | 425,555 | Nierenberg Investment Management Company, Inc., it's General Partner | /s/David Nierenberg, President | |
| Haredale Ltd. | 0.3% | 105,469 | 105,469 | 0 | /s/ David Nierenberg | David Nierenberg, President | |
| Nierenberg Investment Management Company, Inc. | 10% | 2,980,564 | 0 | 2,980,564 | /s/ David Nierenberg | David Nierenberg, President | 0001282683 |
| David Nierenberg | 10% | 3,087,302 | 101,998 | 2,985,304 | /s/ David Nierenberg | David Nierenberg, President | 0001040899 |
CIK / CUSIP context first