John M. Gellert is COO at SEACOR HOLDINGS INC /NEW/ (CKH). They have made 21 open-market trades across 2 companies since 2006, most recently 2026-03-07.
CIK 0001292966
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 $2.2M since 2017, against 15 sales. Across 6 scored buys the stock is down 9.9% at ninety days, and 19.8 points behind the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 33% | 67% | 50% |
| Avg Move | -3.0% | -3.5% | -9.9% |
| Alpha | -2.1% | -5.4% | -19.8% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SMHI | BUY | 2020-08-10 | 2020-08-12 | $2.90 | $78K | -1.1% | -21.5% | -38.4% |
| SMHI | BUY | 2020-03-06 | 2020-03-09 | $6.52 | $326K | -21.4% | -28.1% | -16.8% |
| SMHI | BUY | 2019-11-13 | 2019-11-14 | $12.71 | $397K | -4.6% | +7.7% | -24.9% |
| SMHI | BUY | 2018-12-21 | 2018-12-21 | $12.10 | $278K | +2.2% | +15.4% | +12.3% |
| SMHI | BUY | 2018-04-26 | 2018-04-26 | $20.00 | $1.0M | +7.1% | +4.8% | +7.1% |
| SMHI | BUY | 2017-08-15 | 2017-08-18 | $12.50 | $106K | -0.3% | +0.9% | +1.3% |
| CKH | SELL | 2016-03-02 | 2016-03-04 | $48.04 | $464K | +3.6% | +5.6% | +13.9% |
| CKH | SELL | 2016-03-02 | 2016-03-04 | $48.04 | $929K | +3.6% | +5.6% | +13.9% |
| CKH | SELL | 2014-03-12 | 2014-03-14 | $85.49 | $256K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2014-03-10 | 2014-03-12 | $88.74 | $1.1M | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2010-12-21 | 2010-12-22 | $104.66 | $916K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2010-12-06 | 2010-12-07 | $113.16 | $863K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2010-11-08 | 2010-11-10 | $98.33 | $1.7M | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2010-03-05 | 2010-03-08 | $78.17 | $410K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2009-06-09 | 2009-06-10 | $77.98 | $16K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2009-03-05 | 2009-03-06 | $54.38 | $176K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2008-03-03 | 2008-03-05 | $95.05 | $310K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2007-03-06 | 2007-03-08 | $94.21 | $221K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2006-11-10 | 2006-11-14 | $92.12 | $691K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2006-03-06 | 2006-03-08 | $74.50 | $60K | -16.4% | -0.0% | -0.0% |
| CKH | SELL | 2006-03-01 | 2006-03-03 | $73.12 | $33K | -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.