DAVID W NIEMIEC
CIK 1102903 · last filed 2026-03-10
DAVID W NIEMIEC is a corporate insider who has filed 29 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for HESM, was dated Mar 10, 2026. Across all open-market trades the lifetime net is +$906.6K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $1.9M 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.
$1.94M
2
29
$906.6K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| HESM | Director | 50,527 | $38.49 | $1.94M | $575.0K | 15 | 2026-03-10 |
| OSI PHARMACEUTICALS INC (OSIP) Delisted | Director | 0 | — | — | $331.6K | 6 | 2010-06-09 |
Recent Filings
29 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-10 | HESM | Mixed | +1,612 | $0 | EDGAR |
| 2025-03-11 | HESM | Mixed | +1,855 | $0 | EDGAR |
| 2024-03-12 | HESM | Mixed | +2,299 | $0 | EDGAR |
| 2023-03-10 | HESM | Mixed | +1,939 | $0 | EDGAR |
| 2022-03-10 | HESM | Mixed | +2,902 | $0 | EDGAR |
| 2021-03-16 | HESM | Exer (M) | +6,069 | $0 | EDGAR |
| 2021-03-09 | HESM | Grant (A) | — | $0 | EDGAR |
| 2020-03-17 | HESM | Grant (A) | — | $0 | EDGAR |
| 2020-03-11 | HESM | Exer (M) | +2,856 | $0 | EDGAR |
| 2019-12-17 | HESM | Grant (A) | +30,995 | $0 | EDGAR |