| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Director | President, CEO | Chief Executive Officer +1 more
2 companies
Demski David M serves as a Director at ATEC and has filed Form 4s across 2 companies. Across recent SEC filings that breaks down to 3 buys and 18 sells.
Historically, Demski David M's trades have earned a middling insider score of 67/100 across 6 rated trades. Over a 12-month horizon, 80.0% of those trades were profitable, with an average 12-month return of +40.4%.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 11, 2025 | ATEC Alphatec Holdings, Inc. | Director | Sell | 30,000 | $21.20 | $636,000.00 | -7.0% | -36.4% | - | |
| Aug 21, 2024 | ATEC Alphatec Holdings, Inc. | Director | Buy | 50,000 | $5.67 | $283,500.00 | +21.0% | +68.5% | +180.5% | |
| Aug 2, 2024 | ATEC Alphatec Holdings, Inc. | Director | Buy | 40,000 | $6.56 | $262,400.00 | +20.2% | +24.6% | +118.6% | |
| Nov 9, 2023 | ATEC Alphatec Holdings, Inc. | Director | Buy | 30,000 | $10.50 | $315,000.00 | +19.8% | +61.1% | -7.1% | |
| Apr 26, 2021 | President, CEO | Sale+OE | 265,522 | $71.54 | $18,995,736.31 | - | +16.0% | -5.6% | ||
| Dec 17, 2020 | President, CEO | Sale+OE | 217,075 | $64.20 | $13,936,215.00 | - | - | - | ||
| Aug 6, 2020 | President, CEO | Sale+OE | 330,000 | $56.39 | $18,608,442.00 | - | - | - | ||
| Apr 19, 2018 | Chief Executive Officer | Sale+OE | 149,109 | $51.00 | $7,604,564.21 | -50.0% | - | - | ||
| Apr 13, 2018 | Chief Executive Officer | Sale+OE | 50,891 | $51.00 | $2,595,441.00 | -25.5% | - | - | ||
| Feb 26, 2015 | President and COO | Sell | 32,510 | $26.00 | $845,260.00 | -17.9% | - | - |