Bret DiMarco is CLO & VP at COHERENT INC (COHR). They have made 9 open-market trades across 1 company since 2009, most recently 2025-11-26.
CIK 0000021510
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 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| COHR | SELL | 2017-11-14 | 2017-11-14 | $301.96 | $541K | +9.2% | -4.5% | -19.4% |
| COHR | SELL | 2017-11-09 | 2017-11-13 | $294.93 | $3.2M | +8.6% | -5.8% | -21.1% |
| COHR | SELL | 2017-05-05 | 2017-05-09 | $225.00 | $653K | -2.9% | +5.3% | +21.9% |
| COHR | SELL | 2017-05-01 | 2017-05-03 | $216.73 | $719K | +16.0% | +11.2% | +37.1% |
| COHR | SELL · Routine | 2016-11-09 | 2016-11-10 | $120.00 | $594K | +9.7% | +11.6% | +36.7% |
| COHR | SELL · 10b5-1 | 2016-11-01 | 2016-11-03 | $103.17 | $128K | +6.1% | +10.9% | +34.6% |
| COHR | SELL | 2016-10-03 | 2016-10-05 | $109.64 | $179K | +2.8% | +8.2% | +18.2% |
| COHR | SELL | 2016-09-01 | 2016-09-06 | $105.74 | $192K | +3.3% | +18.6% | +37.4% |
| COHR | SELL | 2016-08-01 | 2016-08-03 | $106.53 | $88K | +6.4% | +7.4% | +32.6% |
| COHR | SELL | 2016-08-01 | 2016-08-03 | $106.63 | $199K | +6.4% | +7.4% | +32.6% |
| COHR | SELL · 10b5-1 | 2014-12-09 | 2014-12-11 | $60.00 | $264K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2014-05-05 | 2014-05-06 | $60.00 | $108K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2014-02-03 | 2014-02-05 | $65.18 | $95K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2013-07-09 | 2013-07-11 | $60.00 | $420K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2013-05-28 | 2013-05-30 | $59.00 | $168K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2012-12-31 | 2013-01-03 | $50.00 | $307K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2012-05-02 | 2012-05-04 | $52.67 | $1.1M | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-12-15 | 2010-12-17 | $45.00 | $158K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-12-10 | 2010-12-14 | $45.04 | $157K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-12-02 | 2010-12-06 | $43.03 | $524K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-12-01 | 2010-12-01 | $43.04 | $26K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-11-22 | 2010-11-23 | $43.04 | $26K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-11-18 | 2010-11-19 | $43.06 | $601K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-11-10 | 2010-11-12 | $43.36 | $296K | -8.9% | -3.3% | -3.3% |
| COHR | SELL · 10b5-1 | 2010-10-14 | 2010-10-18 | $41.50 | $414K | -8.9% | -3.3% | -3.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.