| 2019-11-01 | Sale | Summit Materials, Inc. SUM | See Remarks | 344,231 0.3069% | $23.60 | $8.12M | -28.53% | |
| 2017-05-05 | Sale | Summit Materials, Inc. SUM | See Remarks | 37,200 0.036% | $28.57 | $1.06M | +7.5% | |
| 2016-12-16 | Sale | Summit Materials, Inc. SUM | See Remarks | 60,000 0.07% | $23.80 | $1.43M | +17.69% | |
| 2016-11-16 | Sale | Summit Materials, Inc. SUM | See Remarks | 50,000 0.0535% | $21.87 | $1.09M | +13.47% | |
| 2016-07-19 | Sale | Summit Materials, Inc. SUM | See Remarks | 39,400 0.0516% | $20.67 | $814,398 | +10.25% | |
| 2016-04-19 | Sale | Summit Materials, Inc. SUM | See Remarks | 20,000 0.0323% | $20.00 | $400,000 | +8.13% | |
| 2015-03-17 | Summit Materials, Inc. SUM | See Remarks | 6,000 0.0192% | $18.00 | $108,000 | +4.37% |