A. Alex Porter is 10% at SEACOR HOLDINGS INC /NEW/ (CKH). They have made 6 open-market trades across 3 companies since 2006, most recently 2011-01-06.
CIK 0001120329
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.
6 open-market purchases totalling $10.8M since 2006, never a sale. Across 5 scored buys the stock is down 0.1% at ninety days, and 0.4 points behind the S&P over the same stretch.
5 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 0% | 0% | 0% |
| Avg Move | -13.4% | -0.1% | -0.1% |
| Alpha | -7.6% | -0.4% | -0.4% |
| Scored | 5 | 5 | 5 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MTXX | BUY | 2011-01-06 | 2011-01-10 | $8.63 | $1.1M | N/A | N/A | N/A |
| CHSP | BUY | 2010-10-06 | 2010-10-08 | $16.25 | $8.9M | -1.7% | -0.5% | -0.5% |
| CKH | BUY | 2006-01-27 | 2006-01-31 | $73.23 | $264K | -16.4% | -0.0% | -0.0% |
| CKH | BUY | 2006-01-26 | 2006-01-31 | $71.82 | $151K | -16.4% | -0.0% | -0.0% |
| CKH | BUY | 2006-01-25 | 2006-01-27 | $71.89 | $273K | -16.4% | -0.0% | -0.0% |
| CKH | BUY | 2006-01-25 | 2006-01-27 | $71.91 | $65K | -16.4% | -0.0% | -0.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.