Mortimer Berkowitz III is Director at Alphatec Holdings, Inc. (ATEC). They have made 9 open-market trades across 1 company since 2006, most recently 2026-06-10.
CIK 0001364333
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.
6 open-market purchases totalling $19.7M since 2006, against 3 sales. Across 6 scored buys the stock is down 0.2% at ninety days, and 1.9 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| ATEC | 650,062 | $5.4M |
Shares reported on the most recent Form 4, priced at the 2026-06-12 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 83% | 0% | 17% |
| Avg Move | +3.6% | -5.7% | -0.2% |
| Alpha | -4.7% | -6.0% | -1.9% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ATEC | SELL | 2025-09-09 | 2025-09-11 | $15.97 | $998K | +0.2% | -14.4% | +35.2% |
| ATEC | BUY | 2022-06-09 | 2022-06-13 | $7.20 | $115K | -4.5% | -7.6% | +25.4% |
| ATEC | SELL | 2012-11-28 | 2012-11-30 | $1.51 | $151K | +5.3% | -5.3% | -5.3% |
| ATEC | SELL | 2010-04-21 | 2010-04-22 | $4.75 | $43.7M | +5.3% | -5.3% | -5.3% |
| ATEC | BUY | 2009-06-04 | 2009-06-08 | $2.54 | $10.0M | +5.3% | -5.3% | -5.3% |
| ATEC | BUY | 2008-08-08 | 2008-11-06 | $4.96 | $25K | +5.3% | -5.3% | -5.3% |
| ATEC | BUY | 2007-09-26 | 2007-10-15 | $3.45 | $9.5M | +5.3% | -5.3% | -5.3% |
| ATEC | BUY | 2007-06-14 | 2007-06-18 | $3.60 | $15K | +5.3% | -5.3% | -5.3% |
| ATEC | BUY | 2006-08-10 | 2006-08-11 | $5.85 | $12K | +5.3% | -5.3% | -5.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.