Demski David M
SEC insider (Form 3/4/5 filer). CIK 0001555392. Director at Alphatec Holdings, Inc. (ATEC) and 2 other issuers. 7 reported Form 4/5 transactions since Sep 2024; latest on Jun 10, 2026. Located in CARLSBAD, CA.
Companies Demski David M has filed insider reports for
- Alphatec Holdings, Inc. (ATEC): Director
- Paragon 28, Inc. (FNA): Director
- Axonics, Inc. (AXNX): Director
Demski David M
CIK: 0001555392
Transaction Breakdown
Open Market Buys (P)0 (0.0%)
High conviction signal
Open Market Sales (S)1 (14.3%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)4 (57.1%)
Compensation grants
Other (G, F, J, C, D, …)2 (28.6%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (7 total)
- Jun 10, 2026ATEC
Alphatec Holdings, Inc.
AwardDirect32K shares- - Dec 11, 2025ATEC
Alphatec Holdings, Inc.
SaleDirect30K shares at avg. $21.20$636K - Jun 11, 2025ATEC
Alphatec Holdings, Inc.
AwardDirect15.1K shares- - Apr 21, 2025FNA
Paragon 28, Inc.
DispositionDirect74.3K shares- - Dec 18, 2024ATEC
Alphatec Holdings, Inc.
AwardDirect126.1K shares- - Dec 10, 2024FNA
Paragon 28, Inc.
AwardDirect34.2K shares- - Nov 15, 2024AXNX
Axonics, Inc.
DispositionDirect9.5K shares at avg. $71.00$677K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 10, 2026 |  ATEC Alphatec Holdings, Inc. | Award | 32,012 | - | $0 | Direct |
| Dec 11, 2025 | ATEC Alphatec Holdings, Inc. | Sale | 30,000 | $21.20 | $636,000 | Direct |
| Jun 11, 2025 | ATEC Alphatec Holdings, Inc. | Award | 15,131 | - | - | Direct |
| Apr 21, 2025 |  FNA Paragon 28, Inc. | Disposition | 74,307 | - | - | Direct |
| Dec 18, 2024 | ATEC Alphatec Holdings, Inc. | Award | 126,051 | - | $0 | Direct |
| Dec 10, 2024 | FNA Paragon 28, Inc. | Award | 34,207 | - | $0 | Direct |
| Nov 15, 2024 |  AXNX Axonics, Inc. | Disposition | 9,542 | $71.00 | $677,482 | Direct |
1-7 of 7 transactions