| Insider Name | Buy/Sell | Company Name | Ticker | Amount | Shares Change | |||
|---|---|---|---|---|---|---|---|---|
| Nov 19, 2018 | Nov 21, 2018 | Beck Thomas A. | Buy | Summit Materials, Inc. | SUM | $13.97 | $139,700 | +43.64% |
| Sep 15, 2017 | Sep 19, 2017 | Beck Thomas A. | Sell | Summit Materials, Inc. | SUM | $29.31 | $537,956 | -0 |
| Sep 06, 2017 | Sep 08, 2017 | Beck Thomas A. | Sell | Summit Materials, Inc. | SUM | $30.23 | $588,222 | -51.46% |