| 2017-11-01 | Sale | Summit Materials, Inc. SUM | See Remarks | 26,324 0.0253% | $31.36 | $825,532 | -5.49% | |
| 2017-09-01 | Sale | Summit Materials, Inc. SUM | See Remarks | 14,574 0.0136% | $30.00 | $437,220 | -0.07% | |
| 2017-08-10 | Sale | Summit Materials, Inc. SUM | See Remarks | 100,000 0.0941% | $28.69 | $2.87M | +5.24% | |
| 2017-08-04 | Sale | Summit Materials, Inc. SUM | See Remarks | 31,500 0.0295% | $29.32 | $923,580 | +2.62% | |
| 2017-06-06 | Sale | Summit Materials, Inc. SUM | See Remarks | 19,000 0.0177% | $26.81 | $509,390 | +10.5% | |
| 2016-12-12 | Sale | Summit Materials, Inc. SUM | See Remarks | 20,000 0.0237% | $24.15 | $483,000 | +16.99% | |
| 2016-11-16 | Sale | Summit Materials, Inc. SUM | See Remarks | 80,000 0.0857% | $21.87 | $1.75M | +13.47% | |
| 2016-08-19 | Sale | Summit Materials, Inc. SUM | See Remarks | 50,000 0.0674% | $19.32 | $966,000 | +22.65% | |
| 2016-07-19 | Sale | Summit Materials, Inc. SUM | See Remarks | 4,815 0.0063% | $20.67 | $99,526 | +10.25% | |
| 2016-05-16 | Sale | Summit Materials, Inc. SUM | See Remarks | 10,000 0.0164% | $21.60 | $216,000 | +7.07% | |
| 2016-04-05 | Sale | Summit Materials, Inc. SUM | See Remarks | 70,000 0.1155% | $19.85 | $1.39M | +9.62% | |
| 2015-03-17 | Summit Materials, Inc. SUM | See Remarks | 3,500 0.0112% | $18.00 | $63,000 | +4.37% |