Gregory R. Chemnitz is CLO & VP +1 at MATERION Corp (MTRN). They have made 28 open-market trades across 1 company since 2017, most recently 2026-03-09.
CIK 0001519910
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.
0 open-market purchases, against 28 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MTRN | 5,935 | $1.5M |
Shares reported on the most recent Form 4, priced at the 2026-03-10 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 |
|---|---|---|---|---|---|---|---|---|
| MTRN | SELL | 2026-03-03 | 2026-03-03 | $157.32 | $711K | -16.4% | -8.4% | +36.8% |
| MTRN | SELL | 2026-02-17 | 2026-02-19 | $157.09 | $628K | +8.0% | -7.6% | +37.9% |
| MTRN | SELL | 2025-11-04 | 2025-11-06 | $113.23 | $196K | -0.1% | +8.1% | +33.0% |
| MTRN | SELL | 2025-08-04 | 2025-08-06 | $105.17 | $631K | +1.2% | +1.0% | +0.1% |
| MTRN | SELL | 2025-05-05 | 2025-05-06 | $80.40 | $311K | +4.5% | +4.7% | +38.8% |
| MTRN | SELL | 2024-11-07 | 2024-11-12 | $117.57 | $235K | -2.1% | -6.5% | -15.6% |
| MTRN | SELL | 2024-11-04 | 2024-11-06 | $105.10 | $210K | -4.8% | -6.6% | -16.2% |
| MTRN | SELL | 2024-08-08 | 2024-08-12 | $112.87 | $226K | +2.9% | -7.0% | +9.2% |
| MTRN | SELL | 2024-05-13 | 2024-05-15 | $113.34 | $387K | -1.0% | -6.0% | -2.6% |
| MTRN | SELL | 2024-02-20 | 2024-02-22 | $133.84 | $767K | +0.1% | +1.5% | -14.6% |
| MTRN | SELL | 2023-08-28 | 2023-08-30 | $107.78 | $347K | -5.5% | -6.7% | +3.0% |
| MTRN | SELL | 2023-05-17 | 2023-05-19 | $102.05 | $485K | -2.4% | +3.8% | -1.8% |
| MTRN | SELL | 2023-02-23 | 2023-02-27 | $110.00 | $330K | +1.2% | +2.4% | -7.4% |
| MTRN | SELL | 2022-08-19 | 2022-08-23 | $96.35 | $276K | -9.6% | -12.7% | -14.8% |
| MTRN | SELL | 2022-05-13 | 2022-05-16 | $80.00 | $376K | -0.6% | -6.6% | +18.0% |
| MTRN | SELL | 2021-02-22 | 2021-02-24 | $67.00 | $449K | +7.8% | -4.2% | +9.8% |
| MTRN | SELL | 2020-08-13 | 2020-08-14 | $59.98 | $154K | -4.6% | -11.9% | -6.0% |
| MTRN | SELL | 2020-08-10 | 2020-08-11 | $60.43 | $242K | -9.7% | -19.6% | -8.7% |
| MTRN | SELL | 2019-02-22 | 2019-02-26 | $58.18 | $126K | -1.8% | -1.4% | +11.0% |
| MTRN | SELL | 2019-02-22 | 2019-02-26 | $58.18 | $126K | -1.8% | -1.4% | +11.0% |
| MTRN | SELL | 2019-02-21 | 2019-02-25 | $57.57 | $173K | -0.7% | -4.1% | +10.1% |
| MTRN | SELL | 2018-11-01 | 2018-11-01 | $57.50 | $230K | -4.8% | -9.1% | -18.7% |
| MTRN | SELL | 2018-08-03 | 2018-08-06 | $63.31 | $127K | -4.1% | -4.2% | -11.3% |
| MTRN | SELL | 2018-05-04 | 2018-05-08 | $52.02 | $520K | +3.7% | +3.5% | +17.9% |
| MTRN | SELL | 2017-11-02 | 2017-11-03 | $50.16 | $201K | -0.9% | -1.8% | -0.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.