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| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2020 | Summit Materials, Inc. | SUM | 0 | -325,567 | 0 | -5,385,000 | |
| 09/30/2020 | Summit Materials, Inc. | SUM | 325,567 | 325,567 | 5,385,000 | 5,385,000 | $16.54 |
| 12/31/2019 | Summit Materials, Inc. | SUM | 0 | -12,820,469 | 0 | -284,615,000 | |
| 09/30/2019 | Summit Materials, Inc. | SUM | 12,820,469 | 0 | 284,615,000 | 37,821,000 | $22.20 |
| 06/30/2019 | Summit Materials, Inc. | SUM | 12,820,469 | 0 | 246,794,000 | 43,333,000 | $19.25 |
| 03/31/2019 | Summit Materials, Inc. | SUM | 12,820,469 | 0 | 203,461,000 | 44,487,000 | $15.87 |
| 12/31/2018 | Summit Materials, Inc. | SUM | 12,820,469 | 3,569,214 | 158,974,000 | -9,214,000 | $12.40 |
| 09/30/2018 | Summit Materials, Inc. | SUM | 9,251,255 | 9,251,255 | 168,188,000 | 168,188,000 | $18.18 |
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