The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Demski David M since 2012.
This trader's CIK number is 1555392.
At the time of last reporting, Demski David M was the Officer of Alphatec Holdings, Inc.. (stock ticker symbol ATEC).
Also see all insider trading activities at Alphatec Holdings, Inc..
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2024 | ATEC | 90,000 | $545,900 | 0 | $0 | 0 | $0 |
| 2023 | ATEC | 30,000 | $315,000 | 0 | $0 | 0 | $0 |
| Insider Buying | Insider Sales | Option Exercises | |||||
|---|---|---|---|---|---|---|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
| 2020 | GMED | 0 | $0 | 547,075 | $32,491,124 | 398,220 | $14,895,240 |
| 2018 | GMED | 0 | $0 | 200,000 | $10,200,000 | 200,000 | $4,484,866 |
| 2015 | GMED | 0 | $0 | 32,510 | $845,260 | 0 | $0 |
| 2014 | GMED | 0 | $0 | 371,329 | $9,164,416 | 71,329 | $795,888 |
| 2013 | GMED | 0 | $0 | 324,154 | $5,876,425 | 0 | $0 |
| 2012 | GMED | 0 | $0 | 98,957 | $1,104,360 | 0 | $0 |
1. Alphatec Holdings, Inc. (ATEC)
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2024-08-21 | ATEC | Buy | 50,000 | 5.67 | 283,500 |
| 2024-08-02 | ATEC | Buy | 40,000 | 6.56 | 262,400 |
| 2023-11-09 | ATEC | Buy | 30,000 | 10.50 | 315,000 |
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|---|---|---|---|---|
| 2020-12-17 | GMED | Sale | 164,719 | 64.20 | 10,574,959 |
| 2020-12-16 | GMED | Option Ex | 52,356 | 32.09 | 1,680,208 |
| 2020-12-17 | GMED | Option Ex | 15,864 | 24.10 | 382,322 |
| 2020-12-16 | GMED | Sale | 52,356 | 64.20 | 3,361,255 |
| 2020-08-06 | GMED | Sale | 330,000 | 56.23 | 18,554,910 |
| 2020-08-06 | GMED | Option Ex | 330,000 | 38.89 | 12,832,710 |
| 2018-04-18 | GMED | Sale | 52,062 | 51.00 | 2,655,162 |
| 2018-04-19 | GMED | Sale | 97,047 | 51.00 | 4,949,397 |
| 2018-04-18 | GMED | Option Ex | 52,062 | 24.02 | 1,250,789 |
| 2018-04-19 | GMED | Option Ex | 97,047 | 24.81 | 2,407,736 |
| 2018-04-12 | GMED | Option Ex | 47,848 | 15.75 | 753,462 |
| 2018-04-13 | GMED | Option Ex | 3,043 | 23.95 | 72,879 |
| 2018-04-12 | GMED | Sale | 47,848 | 51.00 | 2,440,248 |
| 2018-04-13 | GMED | Sale | 3,043 | 51.00 | 155,193 |
| 2015-02-26 | GMED | Sale | 32,510 | 26.00 | 845,260 |
| 2014-03-06 | GMED | Option Ex | 71,329 | 11.16 | 795,888 |
| 2014-03-06 | GMED | Sale | 271,329 | 26.22 | 7,114,246 |
| 2014-01-15 | GMED | Sale | 96,813 | 20.51 | 1,985,634 |
| 2013-12-31 | GMED | Sale | 3,187 | 20.25 | 64,536 |
| 2013-12-18 | GMED | Sale | 1,634 | 19.75 | 32,271 |
| 2013-12-19 | GMED | Sale | 19,412 | 19.75 | 383,387 |
| 2013-12-20 | GMED | Sale | 28,954 | 19.75 | 571,841 |
| 2013-11-27 | GMED | Sale | 30,447 | 19.25 | 586,104 |
| 2013-11-26 | GMED | Sale | 6,876 | 19.25 | 132,363 |
| 2013-11-01 | GMED | Sale | 1,498 | 19.25 | 28,836 |
| 2013-10-31 | GMED | Sale | 111,179 | 18.88 | 2,099,059 |
| 2013-08-22 | GMED | Sale | 44,154 | 17.95 | 792,564 |
| 2013-05-03 | GMED | Sale | 40,000 | 16.25 | 650,000 |
| 2013-03-11 | GMED | Sale | 14,225 | 15.00 | 213,375 |
| 2013-02-13 | GMED | Sale | 25,775 | 15.00 | 386,625 |
| 2012-08-08 | GMED | Sale | 98,957 | 11.16 | 1,104,360 |
Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Demski David M (Officer of Alphatec Holdings, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.