Gary A. Kolstad is CEO & President at CARBO CERAMICS INC (CRR). They have made 22 open-market trades across 1 company since 2006, most recently 2026-05-08.
CIK 0001362991
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.
20 open-market purchases totalling $1.1M since 2006, against 2 sales. Across 20 scored buys the stock is up 23.9% at ninety days, and 20.7 points ahead of the S&P over the same stretch.
20 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 45% | 85% | 85% |
| Avg Move | +1.7% | +10.7% | +23.9% |
| Alpha | +3.8% | +9.6% | +20.7% |
| Scored | 20 | 20 | 20 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CRR | SELL | 2020-06-12 | 2020-07-06 | $0.02 | $2K | N/A | N/A | N/A |
| CRR | BUY | 2019-08-07 | 2019-08-07 | $1.18 | $30K | +10.0% | +45.8% | +42.5% |
| CRR | BUY | 2019-07-29 | 2019-07-30 | $1.06 | $53K | +6.8% | +45.3% | +61.5% |
| CRR | BUY | 2018-12-04 | 2018-12-04 | $4.77 | $48K | -23.9% | -15.6% | -9.6% |
| CRR | BUY | 2018-05-17 | 2018-05-17 | $10.65 | $43K | -7.1% | -23.5% | -26.3% |
| CRR | BUY | 2018-05-08 | 2018-05-08 | $8.90 | $27K | +11.1% | -3.6% | -11.2% |
| CRR | BUY | 2018-05-03 | 2018-05-04 | $8.89 | $27K | +25.6% | +8.5% | +1.4% |
| CRR | BUY | 2018-05-01 | 2018-05-01 | $8.49 | $85K | +17.6% | +7.8% | +7.1% |
| CRR | BUY | 2017-05-03 | 2017-05-03 | $6.37 | $127K | +25.3% | +12.3% | +0.4% |
| CRR | BUY | 2016-11-03 | 2016-11-03 | $6.28 | $19K | +13.2% | +36.8% | +122.2% |
| CRR | BUY | 2016-11-01 | 2016-11-01 | $6.06 | $42K | +17.8% | +36.3% | +134.8% |
| CRR | BUY | 2016-10-31 | 2016-10-31 | $6.04 | $60K | +10.7% | +29.2% | +120.1% |
| CRR | SELL | 2016-03-02 | 2016-03-04 | $18.90 | $106K | -12.8% | -33.7% | -45.0% |
| CRR | BUY | 2014-08-07 | 2014-08-08 | $103.36 | $207K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2012-11-07 | 2012-11-07 | $73.80 | $37K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2012-11-02 | 2012-11-02 | $75.85 | $76K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2012-10-31 | 2012-11-01 | $74.31 | $74K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2010-05-06 | 2010-05-07 | $65.92 | $66K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2008-11-03 | 2008-11-04 | $43.60 | $22K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2007-05-15 | 2007-05-16 | $40.97 | $20K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2006-12-06 | 2006-12-07 | $37.70 | $38K | -8.1% | +3.8% | +3.8% |
| CRR | BUY | 2006-10-31 | 2006-11-01 | $33.35 | $33K | -8.1% | +3.8% | +3.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.