David Nierenberg
CIK 1040899 · last filed 2023-12-15
David Nierenberg is a corporate insider who has filed 97 SEC Form 4 insider transactions across 10 companies since 2007. The most recent filing shows the insider bought $72.5K of FTK on Dec 15, 2023. Across all open-market trades the lifetime net is −$67.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $79.2M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$79.22M
10
97
-$67.74M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| FTK | Director | 835,079 | $24.64 | $20.58M | $5.68M | 26 | 2023-12-15 |
| ROSETTA STONE INC (RST) Delisted | Director | 0 | — | — | -$14.43M | 16 | 2020-10-16 |
| RVSB | Director | 130,869 | $5.98 | $782.6K | $637.0K | 6 | 2020-03-17 |
| Houston Wire & Cable CO (HWCC) Delisted | Director | 664,888 | $5.30 | $3.52M | $1.60M | 1 | 2020-03-17 |
| ELECTRO SCIENTIFIC INDUSTRIES INC (ESIO) Delisted | Director | 2,048,494 | — | — | $2.81M | 7 | 2015-05-18 |
| ASSET ACCEPTANCE CAPITAL CORP (AACC) Delisted | 10%+ Owner | 2,787,899 | — | — | $25.32M | 12 | 2013-04-16 |
| MOVE | 10%+ Owner | 3,060,568 | $18.91 | $57.86M | -$95.19M | 7 | 2012-11-29 |
| NATUS MEDICAL INC (BABY) Delisted | 10%+ Owner | 422,738 | — | — | -$53.35M | 6 | 2010-03-09 |
| MEXICAN RESTAURANTS INC (CASA) Delisted | 10%+ Owner | 0 | $0.04 | $0 | -$14.32M | 1 | 2009-12-02 |
| MEDCATH CORP (MDTH) Delisted | 10%+ Owner | 558,166 | — | — | $73.50M | 6 | 2008-08-27 |
Recent Filings
97 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2023-12-15 | FTK | Buy (P) | +19,481 | $72.5K | EDGAR |
| 2023-12-13 | FTK | Buy (P) | +54,859 | $189.2K | EDGAR |
| 2023-07-05 | FTK | Grant (A) | +241,096 | $0 | EDGAR |
| 2023-06-09 | FTK | Sell (S) | −750,000 | -$468.8K | EDGAR |
| 2023-01-24 | FTK | Grant (A) | +13,179 | $0 | EDGAR |
| 2022-08-08 | FTK | Grant (A) | +165,289 | $0 | EDGAR |
| 2022-03-23 | FTK | Conv (C) | +2,793,030 | $0 | EDGAR |
| 2022-02-04 | FTK | Buy (P) | — | $0 | EDGAR |
| 2021-06-21 | — | Disp (D) | −4,086,716 | $0 | |
| 2021-06-07 | FTK | Grant (A) | +103,774 | $0 | EDGAR |