William S. Johnson is President & CFO +1 at CABOT MICROELECTRONICS CORP (CCMP). They have made 29 open-market trades across 1 company since 2006, most recently 2025-11-06.
CIK 0001102934
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 29 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CCMP | SELL | 2017-10-31 | 2017-11-02 | $96.38 | $3.4M | +0.0% | -4.9% | +4.8% |
| CCMP | SELL | 2017-08-02 | 2017-08-03 | $73.77 | $1.7M | -3.3% | -0.9% | +33.7% |
| CCMP | SELL | 2017-05-05 | 2017-05-08 | $78.08 | $3.0M | -4.2% | -1.2% | -8.0% |
| CCMP | SELL | 2017-01-30 | 2017-02-01 | $67.37 | $2.6M | +1.9% | +4.0% | +16.9% |
| CCMP | SELL | 2016-10-31 | 2016-11-01 | $54.81 | $3.2M | +7.2% | +6.9% | +23.7% |
| CCMP | SELL | 2016-08-01 | 2016-08-02 | $50.43 | $4.0M | -0.9% | +0.2% | +10.5% |
| CCMP | SELL | 2016-08-01 | 2016-08-02 | $50.43 | $2.0M | -0.9% | +0.2% | +10.5% |
| CCMP | SELL | 2015-11-30 | 2015-12-02 | $41.98 | $868K | -9.5% | +0.6% | -9.3% |
| CCMP | SELL | 2015-02-02 | 2015-02-03 | $49.99 | $2.0M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2014-11-05 | 2014-11-06 | $47.56 | $1.8M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2014-05-05 | 2014-05-07 | $42.04 | $1.7M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2014-05-01 | 2014-05-02 | $42.69 | $2.0M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2013-11-21 | 2013-11-21 | $43.47 | $2.0M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2013-11-04 | 2013-11-04 | $42.23 | $1.8M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2013-09-03 | 2013-09-04 | $36.19 | $1.3M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2013-05-28 | 2013-05-29 | $36.27 | $56K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2013-05-24 | 2013-05-28 | $35.62 | $1.0M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2013-05-22 | 2013-05-24 | $36.21 | $217K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2012-09-13 | 2012-09-14 | $35.32 | $1.0M | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2012-08-16 | 2012-08-16 | $31.58 | $676K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2012-08-15 | 2012-08-16 | $31.52 | $240K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2010-12-01 | 2010-12-01 | $42.04 | $336K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2008-08-07 | 2008-08-07 | $40.61 | $609K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2007-12-26 | 2007-12-26 | $37.87 | $4K | -9.5% | +0.6% | +0.6% |
| CCMP | SELL | 2007-12-05 | 2007-12-05 | $37.00 | $24K | -9.5% | +0.6% | +0.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.