Demski David M
CIK: 0001555392
Demski David M's purchase track record
How the stock did after each of Demski David M's open-market purchases, measured from the purchase date. Several fills within a week count as one purchase.
Purchases measured
3
of 3 since November 9, 2023
Stock higher 6 months later
100%
3 months: 100%
Median 6-month return
+87.1%
3 months: +64.5%
Beat the S&P 500
67%
median +74.2% vs. index
| Purchase | Stock | Amount | 3 months | 6 months | S&P 500, 6 mo. |
|---|---|---|---|---|---|
| 8/21/2024 | ATEC | $284K | +74.8% | +91.2% | +9.3% |
| 8/2/2024 | ATEC | $262K | +28.7% | +87.1% | +13.0% |
| 11/9/2023 | ATEC | $315K | +64.5% | +12.1% | +19.9% |
Computed by MarketWall from SEC Form 4 filings and daily closing prices (close on the purchase date to the close about 3 and 6 months later). Companies that have since delisted are not included. Past results, not investment advice.
Associated companies
Transaction History
| ATEC | ▲ Buy | Grant | 32,012 | $0 | 6/10/2026 | View on chart |
| ATEC | ▼ Sell | Open Market | 30,000 | $636K | 12/11/2025 | View on chart |
| ATEC | ▲ Buy | Grant | 15,131 | $0 | 6/11/2025 | View on chart |
| ATEC | ▲ Buy | Grant | 126,051 | — | 12/18/2024 | View on chart |
| ATEC | ▲ Buy | Open Market | 50,000 | $284K | 8/21/2024 | View on chart |
| ATEC | ▲ Buy | Open Market | 40,000 | $262K | 8/2/2024 | View on chart |
| ATEC | ▲ Buy | Grant | 16,747 | $0 | 6/12/2024 | View on chart |
| ATEC | ▲ Buy | Open Market | 30,000 | $315K | 11/9/2023 | View on chart |
| ATEC | ▲ Buy | Grant | 7,842 | $0 | 10/17/2023 | View on chart |
| ATEC | ▲ Buy | Grant | 23,852 | $0 | 10/17/2023 | View on chart |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
September 25, 2026
Alphatec Appoints Tommy Carls as EVP for Data Intelligence
Alphatec Holdings has named Tommy Carls as Executive Vice President of Data Intelligence and Strategy. This leadership addition focuses on the company's data capabilities and strategic direction. The stock is currently trading within its 52-week range, with analyst targets averaging $15.79.
Alphatec Appoints Tommy Carls as EVP for Data Intelligence. Alphatec Holdings has named Tommy Carls as Executive Vice President of Data Intelligence and Strategy. This leadership addition focuses on the company's data capabilities and strategic direction. The stock is currently trading within its 52-week range, with analyst targets averaging $15.79.