Manuel N. Stamatakis is Director at Mistras Group, Inc. (MG). They have made 16 open-market trades across 1 company since 2009, most recently 2026-03-04.
CIK 0001473735
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.
15 open-market purchases totalling $2.0M since 2009, against 1 sale. Across 15 scored buys the stock is up 4.3% at ninety days, and 3.3 points behind the S&P over the same stretch.
15 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| MG | 509,795 | $10.9M |
Shares reported on the most recent Form 4, priced at the 2026-03-10 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 53% | 60% | 47% |
| Avg Move | +1.8% | +3.3% | +4.3% |
| Alpha | +0.4% | +0.6% | -3.3% |
| Scored | 15 | 15 | 15 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MG | BUY | 2025-06-05 | 2025-06-06 | $7.71 | $77K | -3.2% | +3.7% | +25.8% |
| MG | BUY | 2025-03-19 | 2025-03-20 | $9.95 | $100K | +3.8% | -11.6% | -25.5% |
| MG | BUY | 2023-11-07 | 2024-03-27 | $6.00 | $90K | -3.7% | -7.8% | -19.6% |
| MG | BUY | 2021-08-17 | 2021-08-19 | $9.62 | $48K | +13.7% | -0.3% | -3.5% |
| MG | BUY | 2021-05-11 | 2021-05-12 | $9.98 | $150K | +5.1% | +15.0% | +8.2% |
| MG | BUY | 2020-12-18 | 2020-12-21 | $7.35 | $147K | -10.7% | +4.1% | +38.6% |
| MG | SELL | 2020-11-16 | 2020-11-17 | $4.55 | $434K | +3.6% | +45.2% | +56.9% |
| MG | BUY | 2020-03-30 | 2020-04-01 | $4.67 | $234K | -2.8% | +11.6% | -0.3% |
| MG | BUY | 2019-11-08 | 2019-11-12 | $14.60 | $73K | -6.7% | +0.1% | -32.4% |
| MG | BUY | 2019-05-15 | 2019-05-22 | $14.04 | $70K | -0.4% | -1.1% | +8.9% |
| MG | BUY | 2019-05-13 | 2019-05-14 | $13.25 | $66K | +2.3% | +0.6% | +18.5% |
| MG | BUY | 2019-03-14 | 2019-03-18 | $13.85 | $208K | -2.5% | -1.9% | -3.5% |
| MG | BUY | 2018-12-18 | 2018-12-21 | $14.50 | $363K | +2.9% | +5.7% | -2.8% |
| MG | BUY | 2017-08-14 | 2017-08-24 | $18.36 | $138K | +9.0% | +15.1% | +26.3% |
| MG | BUY | 2017-02-03 | 2017-08-25 | $22.81 | $114K | +10.8% | +16.2% | +26.7% |
| MG | BUY | 2009-10-08 | 2009-10-09 | $12.50 | $75K | +9.8% | -0.4% | -0.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.