Who
David M. Demski
Director
Company insider
Files Form 4 as: Director, Alphatec Holdings; Director, Paragon 28; Director, Axonics; President, CEO, Globus Medical.
In numbers
- Trades disclosed
- 140
- Buys
- 3
- Sells
- 27
- Bought
- $861K
- Sold
- $97.8M
- Companies
- 4
- Companies where not an officer
- 3
- First trade
- 8 Aug 2012
- Last trade
- 10 Jun 2026
- Last filed
- 12 Jun 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 10 Jun 2026filed 12 Jun 2026 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —32,012 at $0.00 | filing |
| 10 Jun 2026filed 12 Jun 2026 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —32,012 at $0.00 | filing |
| 11 Dec 2025filed 12 Dec 2025 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Sold | $636K30,000 at $21.20 | filing |
| 11 Jun 2025filed 13 Jun 2025 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —15,131 at $0.00 | filing |
| 21 Apr 2025filed 21 Apr 2025 | Paragon 28 | SEC FORM 4 Code D | —74,307 | filing |
| 18 Dec 2024filed 18 Dec 2024 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —126,051 | filing |
| 10 Dec 2024filed 12 Dec 2024 | Paragon 28 | SEC FORM 4 Code A | —34,207 at $0.00 | filing |
| 15 Nov 2024filed 15 Nov 2024 | Axonicsoption or derivative | SEC FORM 4 Code D | $193K10,000 at $19.30 | filing |
| 15 Nov 2024filed 15 Nov 2024 | Axonics | SEC FORM 4 Code D | $677K9,542 at $71.00 | filing |
| 21 Aug 2024filed 21 Aug 2024 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Bought | $284K50,000 at $5.67 | filing |
| 2 Aug 2024filed 5 Aug 2024 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Bought | $262K40,000 at $6.56 | filing |
| 12 Jun 2024filed 14 Jun 2024 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —16,747 at $0.00 | filing |
| 9 Nov 2023filed 13 Nov 2023 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Bought | $315K30,000 at $10.50 | filing |
| 17 Oct 2023filed 19 Oct 2023 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —7,842 at $0.00 | filing |
| 17 Oct 2023filed 19 Oct 2023 | ATEC Alphatec HoldingsMedical Devices | SEC FORM 4 Code A | —23,852 at $0.00 | filing |
| 26 Jun 2023filed 28 Jun 2023 | Axonics | SEC FORM 4 Code A | —3,000 at $0.00 | filing |
| 18 Aug 2022filed 22 Aug 2022 | Axonics | SEC FORM 4 Code A | —2,100 at $0.00 | filing |
| 27 Jan 2022filed 31 Jan 2022 | GMED Globus Medicaloption or derivative · Medical Devices | SEC FORM 4 Code A | —150,000 at $0.00 | filing |
| 22 Oct 2021filed 2 Nov 2021 | Axonics | SEC FORM 4 Code A | —942 at $0.00 | filing |
| 26 Apr 2021filed 27 Apr 2021 | GMED Globus MedicalMedical Devices | SEC FORM 4 Code M | $2.1M78,334 at $26.27 | filing |
News
IRIDEX (NASDAQ:IRIX) vs. Alphatec (NASDAQ:ATEC) Head-To-Head AnalysisATEC · tickerreport.com · 22 Oct 2026Sanuwave Health (NASDAQ:SNWV) & Alphatec (NASDAQ:ATEC) Head-To-Head ContrastATEC · dailypolitical.com · 11 Oct 2026
0 headlines in the last 90 days name David M. Demski; 2 articles from the last 14 days about the 1 company they traded most, at most three about any one of them.