Anderson Karli S. - Insider Non-Derivative Transactions at Summit Materials, Inc. (SUM) - (SEC)

Updated on January 3, 2026.

According to recent SEC insider information filed on Feb 10, 2025, Anderson Karli S.'s relationship to Summit Materials, Inc. (SUM) is Officer (See Remarks), and currently has 0 shares of Class A Common Stock.

The chart below shows the number of shares owned, and the table shows the recent insider transactions.

You can see similar information for other SUM insiders.

Related Topics: SEC Topic List.

Data Source: SEC.

Anderson Karli S. - Insider Non-Derivative Transactions of SUM Class A Common Stock

Anderson Karli S. - Insider Non-Derivative Transactions at SUM

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Date	Transaction	No. of Shares	Price Per Share	Shares Owned After Transactions
Feb 11, 2025	Disposition -- (Class A Common Stock)	48285	52.5	0
Jan 17, 2025	F -- (Class A Common Stock)	2318	52.19	48285
Jan 17, 2025	Acquisition -- (Class A Common Stock)	7587	0	50603
Dec 21, 2024	M -- (Class A Common Stock)	2409	0	32969
Dec 21, 2024	M -- (Class A Common Stock)	6148	0	39117
Dec 21, 2024	F -- (Class A Common Stock)	9690	50.5	43016
Dec 21, 2024	M -- (Class A Common Stock)	13589	0	52706
Mar 8, 2024	F -- (Class A Common Stock)	4998	42.39	29733
Mar 8, 2024	Acquisition -- (Class A Common Stock)	11420	0	34731
Mar 1, 2024	M -- (Class A Common Stock)	2369	0	21355
Mar 1, 2024	F -- (Class A Common Stock)	3527	42.71	23311
Mar 1, 2024	M -- (Class A Common Stock)	2409	0	23764
Mar 1, 2024	M -- (Class A Common Stock)	3074	0	26838
Mar 1, 2023	M -- (Class A Common Stock)	2201	0	16798
Mar 1, 2023	F -- (Class A Common Stock)	3169	29.54	18407
Mar 1, 2023	M -- (Class A Common Stock)	2369	0	19167
Mar 1, 2023	M -- (Class A Common Stock)	2409	0	21576