Nierenberg David bought Potbelly Corp ($PBPB) shares once on the open market in the last year, for a total of about $208,000. His most recent purchase occurred on March 28, 2025. This ranks him 1,502nd among nearly 5,000 insiders by purchase value, well below the average of $1.46 million across 3.3 transactions. He reported no open market sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 28, 2025 | POTBELLY CORP | $PBPB | Nierenberg David | Not found | P | Common Stock | 22169 | $9.36 | 3,109,471.0000 | 30,720,000 | 0.72% | 0.07% |
| Jan. 7, 2025 | POTBELLY CORP | $PBPB | Nierenberg David | Not found | P | Common Stock | 7500 | $9.23 | 3,087,202.0000 | 30,720,000 | 0.24% | 0.02% |
| Jan. 7, 2025 | POTBELLY CORP | $PBPB | Nierenberg David | Not found | P | Common Stock | 100 | $9.24 | 3,087,302.0000 | 30,720,000 | 0.00% | 0.00% |
| Dec. 18, 2024 | POTBELLY CORP | $PBPB | Nierenberg David | Not found | P | Common Stock | 1590 | $9.40 | 4,740.0000 | 30,842,000 | 50.48% | 0.01% |
| Dec. 18, 2024 | POTBELLY CORP | $PBPB | Nierenberg David | Not found | P | Common Stock | 3150 | $9.34 | 4,740.0000 | 30,842,000 | 198.11% | 0.01% |
| Dec. 14, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 6785 | $3.72 | 1,317,566.0000 | 0 | 0.52% | 0.00% |
| Dec. 14, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 11948 | $3.72 | 1,317,566.0000 | 0 | 0.92% | 0.00% |
| Dec. 14, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 748 | $3.72 | 1,317,566.0000 | 0 | 0.06% | 0.00% |
| Dec. 11, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 5254 | $3.19 | 1,281,595.0000 | 0 | 0.41% | 0.00% |
| Dec. 11, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 3752 | $3.19 | 1,295,955.0000 | 0 | 0.29% | 0.00% |
| Dec. 12, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 4954 | $3.42 | 1,286,549.0000 | 0 | 0.39% | 0.00% |
| Dec. 12, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 6923 | $3.42 | 1,277,775.0000 | 0 | 0.54% | 0.00% |
| Dec. 12, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 858 | $3.42 | 1,296,813.0000 | 0 | 0.07% | 0.00% |
| Dec. 13, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 11536 | $3.53 | 1,298,085.0000 | 0 | 0.90% | 0.00% |
| Dec. 13, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 20310 | $3.53 | 1,298,085.0000 | 0 | 1.59% | 0.00% |
| Dec. 13, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | P | Common Shares | 1272 | $3.53 | 1,298,085.0000 | 0 | 0.10% | 0.00% |
| July 1, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | A | Common Shares | 241096 | $0.00 | 7,459,337.0000 | 0 | 3.34% | 0.00% |
| June 7, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | S | Common Shares | 538920 | $0.63 | 7,218,241.0000 | 0 | 6.95% | 0.00% |
| June 7, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | S | Common Shares | 211080 | $0.63 | 7,218,241.0000 | 0 | 2.84% | 0.00% |
| Jan. 20, 2023 | FLOTEK INDUSTRIES INC/CN/ | $FTK | Nierenberg David | Director | A | Common Shares | 13179 | $0.00 | 7,968,241.0000 | 0 | 0.17% | 0.00% |