Ownership

Christopher B. Gaskill - Title: EVP, Chief Legal Officer and Secretary at Summit Materials, Inc.

Insider Transactions and Holdings

Entity Type: Individual
Role: Title: EVP, Chief Legal Officer and Secretary
Stock Symbol: SUM on NYSE
Industry: Mining & Quarrying of Nonmetallic Minerals (No Fuels)
All Insider Reports: All Insider Reports

Christopher B. Gaskill - trading volume in the past year for Summit Materials, Inc.

	Shares	%	Avg Price	Total $
Buys
Sells	-1.54K	100%	$50.91	-$78.2K
Net	-1.54K	-100%		-$78.2K

Holdings reported by Christopher B. Gaskill for Summit Materials, Inc.

Security	Num Shares	Value	Price $	Transaction Date	Ownership	Underlying Class	Underlying Amount
Class A Common Stock	0	$0	$52.50	Feb 10, 2025	Direct
Restricted Stock Units	0	$0	$52.50	Feb 10, 2025	Direct	Class A Common Stock
Options (right to buy)	0			Dec 10, 2024	Direct	Class A Common Stock
Performance Stock Units	0			Feb 10, 2025	Direct	Class A Common Stock

Transactions reported by Christopher B. Gaskill for Summit Materials, Inc.

Sym	Class	Transaction	%	Value $	* Price $	Shares	Shares After	Date	Ownership

* An asterisk sign (*) next to the price indicates that the price is likely invalid.