David M. Demski is CEO at GLOBUS MEDICAL INC (GMED). They have made 13 open-market trades across 2 companies since 2012, most recently 2026-06-10.
CIK 0001555392
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
3 open-market purchases totalling $861K since 2023, against 10 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GMED | 144,263 | $11.1M |
| ATEC | 431,635 | $4.5M |
| FNA | 74,307 | $973K |
| AXNX | 9,542 | $677K |
| Total | $17.2M |
Shares reported on the most recent Form 4, priced at the 2026-06-12 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ATEC | SELL | 2025-12-11 | 2025-12-12 | $21.20 | $636K | +4.6% | -11.4% | -37.1% |
| ATEC | BUY | 2024-08-21 | 2024-08-21 | $5.67 | $284K | +16.0% | +2.9% | +63.3% |
| ATEC | BUY | 2024-08-02 | 2024-08-05 | $6.56 | $262K | -3.5% | +3.1% | +27.6% |
| ATEC | BUY | 2023-11-09 | 2023-11-13 | $10.50 | $315K | +14.6% | +29.3% | +58.1% |
| GMED | SELL | 2021-04-23 | 2021-04-27 | $71.54 | $38.0M | +3.0% | +0.8% | +16.5% |
| GMED | SELL | 2020-12-16 | 2020-12-18 | $64.20 | $27.9M | +1.9% | -0.4% | -6.0% |
| GMED | SELL | 2020-08-06 | 2020-08-10 | $56.39 | $18.6M | -3.3% | +1.7% | +4.6% |
| GMED | SELL | 2018-04-18 | 2018-04-20 | $51.00 | $2.7M | -5.2% | -0.1% | +0.4% |
| GMED | SELL | 2018-04-18 | 2018-04-20 | $51.00 | $7.6M | -5.2% | -0.1% | +0.4% |
| GMED | SELL | 2018-04-12 | 2018-04-16 | $51.00 | $2.6M | +3.2% | +1.3% | +3.6% |
| GMED | SELL · 10b5-1 | 2015-02-26 | 2015-03-02 | $26.00 | $845K | -7.9% | -2.9% | -2.9% |
| GMED | SELL | 2014-03-06 | 2014-03-10 | $25.83 | $7.0M | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2014-01-15 | 2014-01-16 | $20.51 | $2.0M | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-12-31 | 2014-01-02 | $20.25 | $65K | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-12-18 | 2013-12-20 | $19.75 | $988K | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-11-26 | 2013-11-27 | $19.25 | $718K | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-10-31 | 2013-11-04 | $18.59 | $2.1M | -7.9% | -2.9% | -2.9% |
| GMED | SELL | 2013-08-22 | 2013-08-26 | $17.95 | $793K | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-05-03 | 2013-05-07 | $16.25 | $650K | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-03-11 | 2013-03-13 | $15.00 | $213K | -7.9% | -2.9% | -2.9% |
| GMED | SELL · 10b5-1 | 2013-02-13 | 2013-02-15 | $15.00 | $387K | -7.9% | -2.9% | -2.9% |
| GMED | SELL | 2012-08-08 | 2012-08-10 | $11.16 | $1.1M | -7.9% | -2.9% | -2.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.