| 2016-11-16 | Sale | Summit Materials, Inc. SUM | 10 percent owner | 12,501 0.0134% | $21.87 | $273,397 | +13.47% | |
| 2016-07-19 | Sale | Summit Materials, Inc. SUM | 10 percent owner | 9,278 0.0122% | $20.67 | $191,776 | +10.25% | |
| 2016-04-19 | Sale | Summit Materials, Inc. SUM | 10 percent owner | 7,047 0.0114% | $20.00 | $140,940 | +8.13% | |
| 2015-08-11 | Sale | Summit Materials, Inc. SUM | 10 percent owner | 16.93M – | $0 | $0 | -20.63% |