BlackRock, Inc. 13D and 13G filings for Summit Materials, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2024-11-08 5:31 pm Unchanged | 2024-09-30 | 13G | Summit Materials, Inc. SUM | BlackRock Inc. BLK | 10,049,019 5.700% | 0 (Unchanged) | Filing |
| 2024-10-24 2:02 pm Sale | 2024-09-30 | 13G | Summit Materials, Inc. SUM | BlackRock Inc. BLK | 10,049,019 5.700% | -1,316,132 (-11.58%) | Filing |
| 2024-01-24 5:23 pm Purchase | 2023-12-31 | 13G | Summit Materials, Inc. SUM | BlackRock Inc. BLK | 11,365,151 9.500% | 2,192,134 (+23.90%) | Filing |
| 2023-02-03 4:27 pm Purchase | 2022-12-31 | 13G | Summit Materials, Inc. SUM | BlackRock Inc. BLK | 9,173,017 7.900% | 46,019 (+0.50%) | Filing |
| 2022-02-03 4:41 pm Sale | 2021-12-31 | 13G | Summit Materials, Inc. SUM | BlackRock Inc. BLK | 9,126,998 7.600% | -388,752 (-4.09%) | Filing |
| 2021-02-01 08:23 am Purchase | 2020-12-31 | 13G | Summit Materials, Inc. SUM | BlackRock Inc. BLK | 9,515,751 8.200% | 577,216 (+6.46%) | Filing |