Edward H. McDermott is 10% at CABOT CORP (CBT). They have made 6 open-market trades across 6 companies since 2008, most recently 2025-10-24.
CIK 0001252464
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.
4 open-market purchases totalling $198.4M since 2008, against 2 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ADVS | SELL | 2013-08-19 | 2013-08-19 | $25.79 | $28.1M | N/A | N/A | N/A |
| REN | BUY | 2013-05-09 | 2013-05-13 | $8.04 | $50.4M | -24.4% | -2.3% | -2.3% |
| LBTYA | BUY | 2009-11-12 | 2009-11-16 | $21.38 | $128.3M | -18.5% | +0.9% | +0.9% |
| CPN | BUY | 2008-10-23 | 2008-10-24 | $10.99 | $12.0M | -7.4% | +0.4% | +0.4% |
| MLM | BUY | 2008-10-09 | 2008-10-14 | $76.98 | $7.7M | -9.0% | +0.6% | +0.6% |
| CBT | SELL | 2008-10-06 | 2008-10-08 | $28.98 | $9.4M | -8.2% | +0.2% | +0.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.