Dimensional Fund Advisors’s Summit Materials, Inc. Class A Common Stock SUM Stock Holding History

Dimensional Fund Advisors’s Portfolio SUM Stock Details SUM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q1	–	Sell	-3,147,009	Closed	-$159M	–	3379
2024 Q4	$159M	Sell	3,147,009 -1,035,244	-25%	-$48.4M	0.04%	640
2024 Q3	$163M	Sell	4,182,253 -145,188	-3%	-$5.58M	0.04%	638
2024 Q2	$158M	Sell	4,327,441 -540,509	-11%	-$21.2M	0.04%	588
2024 Q1	$217M	Sell	4,867,950 -590,864	-11%	-$23.4M	0.06%	395
2023 Q4	$210M	Sell	5,458,814 -77,813	-1%	-$2.7M	0.06%	373
2023 Q3	$172M	Sell	5,536,627 -442,634	-7%	-$15.8M	0.06%	409
2023 Q2	$226M	Sell	5,979,261 -148,066	-2%	-$4.58M	0.07%	282
2023 Q1	$175M	Buy	6,127,327 +128,368	+2%	+$3.88M	0.06%	386
2022 Q4	$170K	Buy	5,998,959 +293,145	+5%	+$8.08M	0.05%	405
2022 Q3	$134M	Buy	5,705,814 +103,285	+2%	+$2.77M	0.05%	484
2022 Q2	$128M	Buy	5,602,529 +184,732	+3%	+$4.91M	0.05%	534
2022 Q1	$165M	Sell	5,417,797 -277,806	-5%	-$9.25M	0.05%	466
2021 Q4	$225M	Sell	5,695,603 -353,405	-6%	-$12.9M	0.07%	315
2021 Q3	$190M	Buy	6,049,008 +90,025	+2%	+$2.94M	0.06%	374
2021 Q2	$204M	Sell	5,958,983 -78,223	-1%	-$2.47M	0.06%	337
2021 Q1	$166M	Sell	6,037,206 -103,575	-2%	-$2.6M	0.06%	440
2020 Q4	$121M	Sell	6,140,781 -141,912	-2%	-$2.64M	0.04%	584
2020 Q3	$102M	Buy	6,282,693 +189,411	+3%	+$3.03M	0.04%	561
2020 Q2	$96.3M	Buy	6,093,282 +486,426	+9%	+$6.98M	0.04%	586
2020 Q1	$82.7M	Buy	5,606,856 +5,241	+0.1%	+$102K	0.04%	565
2019 Q4	$132M	Sell	5,601,615 -375,036	-6%	-$8.51M	0.05%	528
2019 Q3	$130M	Buy	5,976,651 +146,800	+3%	+$2.9M	0.05%	479
2019 Q2	$110M	Buy	5,829,851 +1,004,752	+21%	+$16M	0.04%	598
2019 Q1	$75.3M	Buy	4,825,099 +1,178,176	+32%	+$18.4M	0.03%	936
2018 Q4	$44.5M	Buy	3,646,923 +1,394,806	+62%	+$19.3M	0.02%	1385
2018 Q3	$40.3M	Buy	2,252,117 +330,725	+17%	+$7.19M	0.02%	1664
2018 Q2	$49.6M	Buy	1,921,392 +158,471	+9%	+$4.42M	0.02%	1436
2018 Q1	$52.5M	Buy	1,762,921 +233,654	+15%	+$7.21M	0.02%	1290
2017 Q4	$47.3M	Buy	1,529,267 +124,234	+9%	+$3.74M	0.02%	1411
2017 Q3	$43.6M	Buy	1,405,033 +162,702	+13%	+$4.62M	0.02%	1454
2017 Q2	$34.8M	Buy	1,242,331 +284,786	+30%	+$7.41M	0.02%	1614
2017 Q1	$22.9M	Buy	957,545 +687,704	+255%	+$16.1M	0.01%	1906
2016 Q4	$6.22M	Buy	+269,841	New	+$5.66M	﹤0.01%	2484

Other funds holding SUM

SFCL

Strengthening Families & Communities LLC Boston, Massachusetts $401M AUM 33.17% 1-Year Est. Return

Principal Securities Des Moines, Iowa $6.82B AUM 17.15% 1-Year Est. Return

DekaBank Deutsche Girozentrale Frankfurt, Germany $60.6B AUM 23.27% 1-Year Est. Return

WAM

WFA Asset Management Whitefish Bay, Wisconsin $184M AUM 12.29% 1-Year Est. Return

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

HNB

Huntington National Bank Columbus, Ohio $18.1B AUM 24.69% 1-Year Est. Return

Dimensional Fund Advisors's SUM Position: Q1 2025 in Review

Dimensional Fund Advisors sold out of Summit Materials, Inc. Class A Common Stock (SUM) in Q1 2025, closing a stake of 3,147,009 shares — an estimated $159M sold.

Dimensional Fund Advisors first reported a position in SUM in Q4 2016 and held it in 33 quarters. The position peaked at $226M in Q2 2023. 7 funds tracked by Wall St. Rank hold SUM as of Q1 2025.

Dimensional Fund Advisors reported no remaining Summit Materials, Inc. Class A Common Stock position as of Q1 2025 after selling out during the quarter.
Dimensional Fund Advisors sold 3,147,009 Summit Materials, Inc. Class A Common Stock shares in Q1 2025, an estimated $159M.
Dimensional Fund Advisors first reported a position in Summit Materials, Inc. Class A Common Stock in Q4 2016 and held it in 33 quarters.
Dimensional Fund Advisors's Summit Materials, Inc. Class A Common Stock position peaked at $226M in Q2 2023.
7 funds tracked by Wall St. Rank held Summit Materials, Inc. Class A Common Stock as of Q1 2025.

Based on Dimensional Fund Advisors's 13F filing for Q1 2025, filed 13 May 2025.