David M Demski
CIK 1555392 · President, CEO · last filed 2025-12-12
David M Demski is a President, CEO who has filed 45 SEC Form 4 insider transactions across 4 companies since 2012. The most recent filing shows the insider sold $636.0K of ATEC on Dec 12, 2025. Across all open-market trades the lifetime net is −$97.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $13.1M 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.
$13.06M
4
45
-$96.98M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ATEC | Director | 399,623 | $8.28 | $3.31M | $224.9K | 8 | 2025-12-12 |
| Paragon 28, Inc. (FNA) Delisted | Director | 0 | $13.09 | $0 | $0 | 2 | 2025-04-21 |
| Axonics, Inc. (AXNX) Delisted | Director | 0 | $70.98 | $0 | $0 | 5 | 2024-11-15 |
| GMED | President, CEO | 121,259 | $80.39 | $9.75M | -$97.20M | 30 | 2022-01-31 |
Recent Filings
45 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-12-12 | ATEC | Sell (S) | −30,000 | -$636.0K | EDGAR |
| 2025-06-13 | ATEC | Grant (A) | +15,131 | $0 | EDGAR |
| 2025-04-21 | Paragon 28, Inc. (FNA) Delisted | Disp (D) | −74,307 | $0 | EDGAR |
| 2024-12-18 | ATEC | Grant (A) | +126,051 | $0 | EDGAR |
| 2024-12-12 | Paragon 28, Inc. (FNA) Delisted | Grant (A) | +34,207 | $0 | EDGAR |
| 2024-11-15 | Axonics, Inc. (AXNX) Delisted | Disp (D) | −9,542 | -$677.5K | EDGAR |
| 2024-08-21 | ATEC | Buy (P) | +50,000 | $283.5K | EDGAR |
| 2024-08-05 | ATEC | Buy (P) | +40,000 | $262.4K | EDGAR |
| 2024-06-14 | ATEC | Grant (A) | +16,747 | $0 | EDGAR |
| 2023-11-13 | ATEC | Buy (P) | +30,000 | $315.0K | EDGAR |