Loomes David - 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, Loomes David's relationship to Summit Materials, Inc. (SUM) is Officer (EVP, Cement), 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.

Loomes David - Insider Non-Derivative Transactions of SUM Class A Common Stock

Loomes David - 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)	33674	52.5	0
Jan 17, 2025	F -- (Class A Common Stock)	3330	52.19	33674
Jan 17, 2025	Acquisition -- (Class A Common Stock)	7086	0	37004
Dec 21, 2024	M -- (Class A Common Stock)	2250	0	20219
Dec 21, 2024	M -- (Class A Common Stock)	5177	0	25396
Dec 21, 2024	F -- (Class A Common Stock)	9452	50.5	29918
Dec 21, 2024	M -- (Class A Common Stock)	13974	0	39370
Mar 1, 2024	M -- (Class A Common Stock)	2703	0	14598
Mar 1, 2024	M -- (Class A Common Stock)	2250	0	16848
Mar 1, 2024	F -- (Class A Common Stock)	2295	42.71	17142
Mar 1, 2024	M -- (Class A Common Stock)	2589	0	19437