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BlackRock Inc.
> SUM
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | Summit Materials, Inc. | SUM | 9,616,329 | 485,086 | 363,978,053,000 | 103,828,940,000 | $37,850.00 |
| 03/31/2023 | Summit Materials, Inc. | SUM | 9,131,243 | -125,149 | 260,149,113,000 | 259,927,329,000 | $28,490.00 |
| 09/30/2022 | Summit Materials, Inc. | SUM | 9,256,392 | -155,927 | 221,784,000 | 2,570,000 | $23.96 |
| 06/30/2022 | Summit Materials, Inc. | SUM | 9,412,319 | 379,448 | 219,214,000 | -61,347,000 | $23.29 |
| 03/31/2022 | Summit Materials, Inc. | SUM | 9,032,871 | 58,438 | 280,561,000 | -79,674,000 | $31.06 |
| 12/31/2021 | Summit Materials, Inc. | SUM | 8,974,433 | 172,210 | 360,235,000 | 78,828,000 | $40.14 |
| 09/30/2021 | Summit Materials, Inc. | SUM | 8,802,223 | -603,780 | 281,407,000 | -46,393,000 | $31.97 |
| 06/30/2021 | Summit Materials, Inc. | SUM | 9,406,003 | -73,470 | 327,800,000 | 62,186,000 | $34.85 |
| 03/31/2021 | Summit Materials, Inc. | SUM | 9,479,473 | 122,786 | 265,614,000 | 77,730,000 | $28.02 |
| 12/31/2020 | Summit Materials, Inc. | SUM | 9,356,687 | 278,852 | 187,884,000 | 37,738,000 | $20.08 |
| 09/30/2020 | Summit Materials, Inc. | SUM | 9,077,835 | 164,671 | 150,146,000 | 6,823,000 | $16.54 |
| 06/30/2020 | Summit Materials, Inc. | SUM | 8,913,164 | 231,456 | 143,323,000 | 13,098,000 | $16.08 |
| 03/31/2020 | Summit Materials, Inc. | SUM | 8,681,708 | -107,412 | 130,225,000 | -79,836,000 | $15.00 |
| 12/31/2019 | Summit Materials, Inc. | SUM | 8,789,120 | 660,814 | 210,061,000 | 29,613,000 | $23.90 |
| 09/30/2019 | Summit Materials, Inc. | SUM | 8,128,306 | 464,885 | 180,448,000 | 180,300,480 | $22.20 |
| 06/30/2019 | Summit Materials, Inc. | SUM | 7,663,421 | 97,208 | 147,520 | -119,927,480 | $0.02 |
| 03/31/2019 | Summit Materials, Inc. | SUM | 7,566,213 | -232,696 | 120,075,000 | 23,368,000 | $15.87 |
| 12/31/2018 | Summit Materials, Inc. | SUM | 7,798,909 | 110,731 | 96,707,000 | -43,064,000 | $12.40 |
| 09/30/2018 | Summit Materials, Inc. | SUM | 7,688,178 | 128,036 | 139,771,000 | -58,682,000 | $18.18 |
| 06/30/2018 | Summit Materials, Inc. | SUM | 7,560,142 | 612,601 | 198,453,000 | -11,919,000 | $26.25 |
| 03/31/2018 | Summit Materials, Inc. | SUM | 6,947,541 | -109,141 | 210,372,000 | -11,492,000 | $30.28 |
| 12/31/2017 | Summit Materials, Inc. | SUM | 7,056,682 | 355,922 | 221,864,000 | 7,239,000 | $31.44 |
| 09/30/2017 | Summit Materials, Inc. | SUM | 6,700,760 | -822,076 | 214,625,000 | 28,735,000 | $32.03 |
| 03/31/2017 | Summit Materials, Inc. | SUM | 7,522,836 | 7,509,709 | 185,890,000 | 185,577,000 | $24.71 |
| 12/31/2016 | Summit Materials, Inc. | SUM | 13,127 | 5,418 | 313,000 | 170,000 | $23.84 |
| 09/30/2016 | Summit Materials, Inc. | SUM | 7,709 | 7,709 | 143,000 | 143,000 | $18.55 |
| 06/30/2016 | Summit Materials, Inc. | SUM | 18,204 | 16,382 | 373,000 | 338,000 | $20.49 |
| 03/31/2016 | Summit Materials, Inc. | SUM | 1,822 | -1,756 | 35,000 | -37,000 | $19.21 |
| 12/31/2015 | Summit Materials, Inc. | SUM | 3,578 | 2,202 | 72,000 | 46,000 | $20.12 |
| 09/30/2015 | Summit Materials, Inc. | SUM | 1,376 | 800 | 26,000 | 11,000 | $18.90 |
| 06/30/2015 | Summit Materials, Inc. | SUM | 576 | 576 | 15,000 | 15,000 | $26.04 |
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