DAVID S CHERNOW
CIK 1169897 · Vice Chairman · last filed 2026-05-01
DAVID S CHERNOW is a Vice Chairman who has filed 49 SEC Form 4 insider transactions across 1 company since 2009. The most recent filing shows the insider had shares withheld for taxes covering $370.6K of SEM on May 1, 2026. Across all open-market trades the lifetime net is −$27.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $14.5M 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.
$14.50M
1
49
-$27.33M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| SEM | Vice Chairman | 870,244 | $16.66 | $14.50M | -$27.33M | 49 | 2026-05-01 |
Recent Filings
49 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-01 | SEM | Tax (F) | −22,586 | -$370.6K | EDGAR |
| 2025-08-04 | SEM | Tax (F) | −49,100 | -$617.2K | EDGAR |
| 2025-07-31 | SEM | Grant (A) | +250,000 | $0 | EDGAR |
| 2025-05-01 | SEM | Tax (F) | −22,586 | -$412.0K | EDGAR |
| 2025-04-29 | SEM | Sell (S) | −225,000 | -$4.05M | EDGAR |
| 2024-11-07 | SEM | Tax (F) | −70,704 | -$2.63M | EDGAR |
| 2024-08-05 | SEM | Tax (F) | −88,380 | -$3.02M | EDGAR |
| 2024-08-02 | SEM | Tax (F) | −73,650 | -$2.89M | EDGAR |
| 2024-05-01 | SEM | Grant (A) | +230,000 | $0 | EDGAR |
| 2023-08-02 | SEM | Mixed | +213,175 | -$1.10M | EDGAR |