David M Demski
CIK 1555392 · President, CEO · last filed 2026-06-12
"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.
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Disclosed Exposure
$14.37M
Companies
4
Total Filings
47
Lifetime Open-Market Net
-$96.98M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ATEC | Director | 431,635 | $9.37 | $4.04M | $224.9K | 9 | 2026-06-12 |
| 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 | $85.15 | $10.33M | -$97.20M | 30 | 2022-01-31 |
Recent Filings · Page 4 of 5
47 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2016-01-27 | GMED | Grant (A) | — | $0 | EDGAR |
| 2015-03-02 | GMED | Sell (S) | −32,510 | -$845.3K | EDGAR |
| 2015-01-22 | GMED | Grant (A) | — | $0 | EDGAR |
| 2014-03-10 | GMED | Mixed | −200,000 | -$6.27M | EDGAR |
| 2014-01-27 | GMED | Grant (A) | — | $0 | EDGAR |
| 2014-01-16 | GMED | Sell (S) | −96,813 | -$1.99M | EDGAR |
| 2014-01-02 | GMED | Sell (S) | −3,187 | -$64.5K | EDGAR |
| 2013-12-20 | GMED | Sell (S) | −50,000 | -$987.5K | EDGAR |
| 2013-11-27 | GMED | Sell (S) | −37,323 | -$718.5K | EDGAR |
| 2013-11-04 | GMED | Sell (S) | −112,677 | -$2.09M | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.