C. James Koch is Chairman at BOSTON BEER CO INC (SAM). They have made 391 open-market trades across 1 company since 2006, most recently 2026-05-20.
CIK 0001008079
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.
1 open-market purchase totalling $334K since 2008, against 390 sales. Too few scored purchases to measure a record yet.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 98% | 98% | 98% |
| Avg Move | -16.0% | -0.8% | -0.9% |
| Scored | 221 | 221 | 221 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SAM | SELL | 2021-07-08 | 2021-07-09 | $960.27 | $2.8M | -4.1% | -29.4% | -43.8% |
| SAM | SELL | 2021-07-07 | 2021-07-08 | $955.44 | $3.3M | -2.3% | -28.6% | -45.2% |
| SAM | SELL | 2021-07-06 | 2021-07-07 | $933.39 | $2.3M | +1.2% | -30.1% | -46.0% |
| SAM | SELL | 2021-07-02 | 2021-07-06 | $952.90 | $2.4M | -3.4% | -31.5% | -47.4% |
| SAM | SELL | 2021-07-01 | 2021-07-02 | $979.06 | $3.6M | -3.6% | -25.8% | -47.2% |
| SAM | SELL | 2021-06-30 | 2021-07-01 | $1026.22 | $4.1M | -5.6% | -26.5% | -47.2% |
| SAM | SELL | 2021-06-29 | 2021-06-30 | $1030.14 | $4.7M | -7.1% | -29.9% | -48.9% |
| SAM | SELL | 2021-06-28 | 2021-06-29 | $1040.46 | $3.5M | -5.3% | -31.8% | -49.4% |
| SAM | SELL | 2021-06-25 | 2021-06-28 | $1026.85 | $4.1M | -6.2% | -30.9% | -49.5% |
| SAM | SELL | 2021-06-24 | 2021-06-25 | $1015.07 | $3.2M | -7.0% | -30.0% | -49.3% |
| SAM | SELL | 2021-06-23 | 2021-06-24 | $1007.59 | $2.5M | -6.7% | -29.3% | -49.2% |
| SAM | SELL | 2021-06-22 | 2021-06-23 | $998.48 | $3.1M | -8.6% | -30.9% | -48.7% |
| SAM | SELL | 2021-06-21 | 2021-06-22 | $986.64 | $3.6M | -4.9% | -5.6% | -47.7% |
| SAM | SELL | 2021-06-18 | 2021-06-21 | $973.58 | $2.4M | -2.6% | -6.2% | -47.1% |
| SAM | SELL | 2021-06-17 | 2021-06-21 | $980.44 | $3.4M | -2.6% | -6.2% | -47.1% |
| SAM | SELL | 2021-06-16 | 2021-06-17 | $1002.25 | $2.9M | +6.9% | -1.6% | -45.2% |
| SAM | SELL | 2021-06-15 | 2021-06-16 | $1014.67 | $3.7M | +5.3% | -6.1% | -46.1% |
| SAM | SELL | 2021-06-14 | 2021-06-15 | $1024.34 | $4.0M | +3.5% | -6.9% | -45.6% |
| SAM | SELL | 2021-06-11 | 2021-06-14 | $1033.21 | $3.3M | -0.4% | -10.2% | -46.9% |
| SAM | SELL | 2021-06-10 | 2021-06-11 | $1037.24 | $3.7M | -1.9% | -4.9% | -47.7% |
| SAM | SELL | 2021-06-09 | 2021-06-10 | $1050.58 | $3.6M | -2.4% | -4.8% | -45.6% |
| SAM | SELL | 2021-06-08 | 2021-06-09 | $1093.32 | $3.4M | -5.2% | -6.4% | -46.2% |
| SAM | SELL | 2021-06-07 | 2021-06-08 | $1082.41 | $4.1M | -11.6% | -12.1% | -49.0% |
| SAM | SELL | 2021-06-04 | 2021-06-07 | $1104.91 | $3.6M | -11.0% | -12.0% | -48.6% |
| SAM | SELL | 2021-06-03 | 2021-06-04 | $1083.65 | $4.2M | -9.6% | -15.7% | -48.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.